Update static/style.css

static/style.css

@@ -1,108 +1,140 @@
-/* =============================================
-   InfinityChat - Professional Design System
-   ============================================= */
+/* ============================================= *
+ * InfinityChat - Design System & Styles         *
+ * Professional, Responsive, Theme-Aware        *
+ * ============================================= */
 
-/* CSS Variables - Theme System */
+/* ---------- CSS Variables (Light Theme Default) ---------- */
 :root {
-    /* Base Colors */
-    --color-primary: #2563EB;
-    --color-primary-dark: #1D4ED8;
-    --color-primary-light: #DBEAFE;
+    /* Primary Palette */
+    --primary: #2563EB;
+    --primary-hover: #1D4ED8;
+    --primary-light: #DBEAFE;
+    --primary-dark: #1E40AF;
     
-    --color-bg: #FFFFFF;
-    --color-bg-secondary: #F9FAFB;
-    --color-bg-tertiary: #F3F4F6;
+    /* Neutrals */
+    --bg: #FFFFFF;
+    --bg-secondary: #F9FAFB;
+    --bg-tertiary: #F3F4F6;
+    --bg-elevated: #FFFFFF;
     
-    --color-text: #111827;
-    --color-text-secondary: #6B7280;
-    --color-text-tertiary: #9CA3AF;
+    /* Text */
+    --text: #111827;
+    --text-secondary: #6B7280;
+    --text-tertiary: #9CA3AF;
+    --text-inverse: #FFFFFF;
     
-    --color-border: #E5E7EB;
-    --color-border-light: #F3F4F6;
+    /* Borders */
+    --border: #E5E7EB;
+    --border-light: #F3F4F6;
+    --border-focus: var(--primary);
     
-    /* Bubble Colors */
-    --bubble-self: var(--color-primary);
+    /* Message Bubbles */
+    --bubble-self: var(--primary);
     --bubble-self-text: #FFFFFF;
-    --bubble-other: var(--color-bg-tertiary);
-    --bubble-other-text: var(--color-text);
+    --bubble-other: var(--bg-tertiary);
+    --bubble-other-text: var(--text);
     
     /* Header */
-    --header-bg: var(--color-bg);
-    --header-border: var(--color-border);
+    --header-bg: var(--bg-elevated);
+    --header-border: var(--border);
+    --header-text: var(--text);
     
     /* Input */
-    --input-bg: var(--color-bg-tertiary);
-    --input-border: var(--color-border);
-    --input-focus: var(--color-primary);
+    --input-bg: var(--bg-tertiary);
+    --input-border: var(--border);
+    --input-text: var(--text);
+    --input-placeholder: var(--text-tertiary);
     
-    /* Shadows */
-    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
-    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
-    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
-    
-    /* Typography */
-    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
-    --font-mono: 'SF Mono', 'Fira Code', monospace;
+    /* Status */
+    --success: #10B981;
+    --warning: #F59E0B;
+    --error: #EF4444;
+    --info: #3B82F6;
     
-    /* Spacing */
-    --space-xs: 0.25rem;
-    --space-sm: 0.5rem;
-    --space-md: 1rem;
-    --space-lg: 1.5rem;
-    --space-xl: 2rem;
+    /* Shadows */
+    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
+    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
+    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
+    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
+    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
     
     /* Border Radius */
+    --radius-xs: 4px;
     --radius-sm: 6px;
     --radius-md: 8px;
     --radius-lg: 12px;
     --radius-xl: 16px;
+    --radius-2xl: 20px;
     --radius-full: 9999px;
     
     /* Transitions */
-    --transition-fast: 150ms ease;
-    --transition-normal: 250ms ease;
+    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
+    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
+    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
+    
+    /* Typography */
+    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', monospace;
+    
+    /* Spacing */
+    --space-1: 0.25rem;
+    --space-2: 0.5rem;
+    --space-3: 0.75rem;
+    --space-4: 1rem;
+    --space-5: 1.25rem;
+    --space-6: 1.5rem;
+    --space-8: 2rem;
+    --space-10: 2.5rem;
+    --space-12: 3rem;
+    
+    /* Layout */
+    --header-height: 64px;
+    --compose-min-height: 60px;
+    --sidebar-width: 320px;
 }
 
-/* Dark Theme */
+/* ---------- Dark Theme ---------- */
 [data-theme="dark"] {
-    --color-primary: #60A5FA;
-    --color-primary-dark: #3B82F6;
-    --color-primary-light: #1E3A5F;
+    --primary: #60A5FA;
+    --primary-hover: #3B82F6;
+    --primary-light: #1E3A5F;
+    --primary-dark: #1D4ED8;
     
-    --color-bg: #111827;
-    --color-bg-secondary: #1F2937;
-    --color-bg-tertiary: #374151;
+    --bg: #111827;
+    --bg-secondary: #1F2937;
+    --bg-tertiary: #374151;
+    --bg-elevated: #1F2937;
     
-    --color-text: #F9FAFB;
-    --color-text-secondary: #9CA3AF;
-    --color-text-tertiary: #6B7280;
+    --text: #F9FAFB;
+    --text-secondary: #9CA3AF;
+    --text-tertiary: #6B7280;
+    --text-inverse: #111827;
     
-    --color-border: #374151;
-    --color-border-light: #1F2937;
+    --border: #374151;
+    --border-light: #1F2937;
     
-    --bubble-self: var(--color-primary);
+    --bubble-self: var(--primary);
     --bubble-self-text: #111827;
-    --bubble-other: var(--color-bg-tertiary);
-    --bubble-other-text: var(--color-text);
+    --bubble-other: var(--bg-tertiary);
+    --bubble-other-text: var(--text);
     
-    --header-bg: var(--color-bg-secondary);
-    --header-border: var(--color-border);
+    --header-bg: var(--bg-secondary);
+    --input-bg: var(--bg-tertiary);
+    --input-border: var(--border);
     
-    --input-bg: var(--color-bg-tertiary);
-    --input-border: var(--color-border);
-    
-    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
+    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
+    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
     --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
+    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
+    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);
 }
 
-/* Custom Theme */
+/* ---------- Custom Theme ---------- */
 [data-theme="custom"] {
-    /* Values set by JavaScript */
+    /* Colors set via JavaScript */
 }
 
-/* =============================================
-   Reset & Base Styles
-   ============================================= */
+/* ---------- Global Reset ---------- */
 *, *::before, *::after {
     margin: 0;
     padding: 0;
@@ -112,171 +144,521 @@
 html {
     font-size: 16px;
     -webkit-text-size-adjust: 100%;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+    text-rendering: optimizeLegibility;
 }
 
 body {
-    font-family: var(--font-sans);
-    background: var(--color-bg);
-    color: var(--color-text);
+    font-family: var(--font-family);
+    font-size: 0.9375rem;
+    line-height: 1.5;
+    color: var(--text);
+    background: var(--bg);
+    overflow: hidden;
     height: 100vh;
+    height: 100dvh; /* Dynamic viewport for mobile */
     width: 100vw;
-    overflow: hidden;
-    line-height: 1.5;
-    -webkit-font-smoothing: antialiased;
+    user-select: none;
 }
 
-/* =============================================
-   Buttons
-   ============================================= */
+/* ---------- Screen Management ---------- */
+.screen {
+    display: none;
+    width: 100%;
+    height: 100%;
+}
+
+.screen.active {
+    display: flex;
+}
+
+#chat-screen {
+    flex-direction: column;
+}
+
+/* ---------- Scrollbar ---------- */
+::-webkit-scrollbar {
+    width: 6px;
+    height: 6px;
+}
+
+::-webkit-scrollbar-track {
+    background: transparent;
+}
+
+::-webkit-scrollbar-thumb {
+    background: var(--border);
+    border-radius: var(--radius-full);
+}
+
+::-webkit-scrollbar-thumb:hover {
+    background: var(--text-tertiary);
+}
+
+/* ---------- Typography ---------- */
+h1, h2, h3, h4, h5, h6 {
+    font-weight: 600;
+    line-height: 1.3;
+    color: var(--text);
+}
+
+p {
+    color: var(--text-secondary);
+}
+
+a {
+    color: var(--primary);
+    text-decoration: none;
+}
+
+a:hover {
+    text-decoration: underline;
+}
+
+small {
+    font-size: 0.8125rem;
+    color: var(--text-tertiary);
+}
+
+.text-secondary { color: var(--text-secondary); }
+.text-success { color: var(--success); }
+.text-error { color: var(--error); }
+.text-warning { color: var(--warning); }
+.text-primary { color: var(--primary); }
+
+/* ---------- Buttons ---------- */
 .btn {
     display: inline-flex;
     align-items: center;
     justify-content: center;
+    gap: var(--space-2);
     padding: 0.625rem 1.25rem;
     font-size: 0.875rem;
     font-weight: 500;
-    border: none;
+    font-family: inherit;
+    border: 1px solid transparent;
     border-radius: var(--radius-md);
     cursor: pointer;
     transition: all var(--transition-fast);
     text-decoration: none;
-    gap: var(--space-sm);
+    white-space: nowrap;
+    line-height: 1.4;
+    position: relative;
+    overflow: hidden;
 }
 
 .btn:disabled {
-    opacity: 0.5;
+    opacity: 0.6;
     cursor: not-allowed;
+    pointer-events: none;
+}
+
+.btn:active {
+    transform: scale(0.98);
 }
 
 .btn-primary {
-    background: var(--color-primary);
+    background: var(--primary);
     color: white;
-    box-shadow: var(--shadow-sm);
+    border-color: var(--primary);
+    box-shadow: var(--shadow-xs);
 }
 
 .btn-primary:hover:not(:disabled) {
-    background: var(--color-primary-dark);
-    box-shadow: var(--shadow-md);
+    background: var(--primary-hover);
+    border-color: var(--primary-hover);
+    box-shadow: var(--shadow-sm);
     transform: translateY(-1px);
 }
 
 .btn-secondary {
-    background: var(--color-bg-secondary);
-    color: var(--color-text);
-    border: 1px solid var(--color-border);
+    background: var(--bg-elevated);
+    color: var(--text);
+    border-color: var(--border);
+    box-shadow: var(--shadow-xs);
 }
 
 .btn-secondary:hover:not(:disabled) {
-    background: var(--color-bg-tertiary);
+    background: var(--bg-tertiary);
+    border-color: var(--text-tertiary);
+}
+
+.btn-ghost {
+    background: transparent;
+    color: var(--text-secondary);
+    border-color: transparent;
+}
+
+.btn-ghost:hover:not(:disabled) {
+    background: var(--bg-tertiary);
+    color: var(--text);
 }
 
-/* =============================================
-   Forms & Inputs
-   ============================================= */
-.input-group {
+.btn-sm {
+    padding: 0.375rem 0.75rem;
+    font-size: 0.8125rem;
+    border-radius: var(--radius-sm);
+}
+
+.btn-block {
+    width: 100%;
+    justify-content: center;
+}
+
+.btn-send {
+    width: 40px;
+    height: 40px;
+    padding: 0;
+    border-radius: var(--radius-full);
+    background: var(--primary);
+    color: white;
+    border: none;
+    box-shadow: var(--shadow-sm);
+}
+
+.btn-send:hover:not(:disabled) {
+    background: var(--primary-hover);
+    box-shadow: var(--shadow-md);
+    transform: scale(1.05);
+}
+
+.btn-send:disabled {
+    background: var(--bg-tertiary);
+    color: var(--text-tertiary);
+    box-shadow: none;
+    transform: none;
+}
+
+/* Icon Button */
+.btn-icon {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 40px;
+    height: 40px;
+    background: transparent;
+    border: none;
+    border-radius: var(--radius-md);
+    color: var(--text-secondary);
+    cursor: pointer;
+    transition: all var(--transition-fast);
+    font-size: 1.125rem;
+    position: relative;
+}
+
+.btn-icon:hover {
+    background: var(--bg-tertiary);
+    color: var(--text);
+}
+
+.btn-icon:active {
+    background: var(--border);
+    transform: scale(0.95);
+}
+
+.btn-icon-sm {
+    width: 32px;
+    height: 32px;
+    font-size: 0.875rem;
+}
+
+/* Badge */
+.badge {
+    position: absolute;
+    top: 2px;
+    right: 2px;
+    min-width: 18px;
+    height: 18px;
+    padding: 0 4px;
+    background: var(--error);
+    color: white;
+    font-size: 0.6875rem;
+    font-weight: 600;
+    border-radius: var(--radius-full);
     display: flex;
-    flex-direction: column;
-    gap: var(--space-xs);
-    margin-bottom: var(--space-md);
+    align-items: center;
+    justify-content: center;
+    border: 2px solid var(--bg);
+}
+
+/* ---------- Forms ---------- */
+.form-group {
+    margin-bottom: var(--space-4);
 }
 
-.input-group label {
+.form-group label {
+    display: block;
+    margin-bottom: var(--space-1);
     font-size: 0.875rem;
     font-weight: 500;
-    color: var(--color-text);
+    color: var(--text);
+}
+
+.form-group label i {
+    margin-right: var(--space-1);
+    color: var(--text-secondary);
+}
+
+.input-wrapper {
+    position: relative;
+    display: flex;
+    align-items: center;
 }
 
-.input {
+.form-input {
     width: 100%;
     padding: 0.75rem 1rem;
     font-size: 0.9375rem;
     font-family: inherit;
-    color: var(--color-text);
+    color: var(--input-text);
     background: var(--input-bg);
     border: 1px solid var(--input-border);
     border-radius: var(--radius-md);
     outline: none;
     transition: all var(--transition-fast);
+    line-height: 1.5;
 }
 
-.input:focus {
-    border-color: var(--input-focus);
-    box-shadow: 0 0 0 3px var(--color-primary-light);
+.form-input:focus {
+    border-color: var(--border-focus);
+    box-shadow: 0 0 0 3px var(--primary-light);
 }
 
-.input::placeholder {
-    color: var(--color-text-tertiary);
+.form-input:disabled {
+    opacity: 0.7;
+    cursor: not-allowed;
 }
 
-select.input {
-    appearance: none;
-    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%236B7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
-    background-repeat: no-repeat;
-    background-position: right 1rem center;
-    padding-right: 2.5rem;
+.form-input::placeholder {
+    color: var(--input-placeholder);
+}
+
+.input-toggle {
+    position: absolute;
+    right: var(--space-2);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 32px;
+    height: 32px;
+    background: transparent;
+    border: none;
+    color: var(--text-tertiary);
     cursor: pointer;
+    font-size: 0.875rem;
+    border-radius: var(--radius-sm);
 }
 
-/* =============================================
-   Auth Screen
-   ============================================= */
-#auth-screen {
+.input-toggle:hover {
+    color: var(--text);
+    background: var(--bg-tertiary);
+}
+
+.form-hint {
+    display: block;
+    margin-top: var(--space-1);
+    font-size: 0.75rem;
+    color: var(--text-tertiary);
+}
+
+.label-hint {
+    font-weight: 400;
+    font-size: 0.75rem;
+    color: var(--text-tertiary);
+}
+
+/* Password Strength */
+.password-strength {
+    margin-top: var(--space-2);
+    margin-bottom: var(--space-4);
     display: flex;
     align-items: center;
+    gap: var(--space-2);
+}
+
+.strength-bar {
+    flex: 1;
+    height: 4px;
+    background: var(--bg-tertiary);
+    border-radius: var(--radius-full);
+    overflow: hidden;
+}
+
+.strength-fill {
+    height: 100%;
+    width: 0;
+    background: var(--error);
+    border-radius: var(--radius-full);
+    transition: all var(--transition);
+}
+
+.strength-fill.weak { background: var(--error); width: 25%; }
+.strength-fill.fair { background: var(--warning); width: 50%; }
+.strength-fill.good { background: #3B82F6; width: 75%; }
+.strength-fill.strong { background: var(--success); width: 100%; }
+
+.strength-text {
+    font-size: 0.75rem;
+    font-weight: 500;
+    min-width: 50px;
+}
+
+/* ---------- Alerts ---------- */
+.alert {
+    padding: var(--space-3) var(--space-4);
+    border-radius: var(--radius-md);
+    display: flex;
+    align-items: center;
+    gap: var(--space-2);
+    font-size: 0.875rem;
+    margin-top: var(--space-4);
+    display: none;
+}
+
+.alert:not(:empty) {
+    display: flex;
+}
+
+.alert i {
+    font-size: 1.125rem;
+}
+
+.alert-error {
+    background: #FEF2F2;
+    color: var(--error);
+    border: 1px solid #FCA5A5;
+}
+
+/* ---------- Spinner ---------- */
+.spinner {
+    width: 24px;
+    height: 24px;
+    border: 3px solid var(--border);
+    border-top-color: var(--primary);
+    border-radius: 50%;
+    animation: spin 0.8s linear infinite;
+}
+
+.spinner-sm {
+    width: 16px;
+    height: 16px;
+    border-width: 2px;
+}
+
+@keyframes spin {
+    to { transform: rotate(360deg); }
+}
+
+/* ========== AUTH SCREEN ========== */
+#auth-screen {
+    background: var(--bg);
+    position: relative;
+    overflow: hidden;
     justify-content: center;
-    min-height: 100vh;
-    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
-    padding: var(--space-xl);
+    align-items: center;
+    padding: var(--space-4);
 }
 
-.auth-container {
+.auth-bg {
+    position: absolute;
+    top: 0;
+    left: 0;
     width: 100%;
-    max-width: 420px;
-    background: var(--color-bg);
-    border-radius: var(--radius-xl);
-    box-shadow: var(--shadow-lg);
-    padding: var(--space-xl);
+    height: 100%;
+    pointer-events: none;
+    z-index: 0;
+}
+
+.auth-bg-circle {
+    position: absolute;
+    border-radius: 50%;
+    background: var(--primary-light);
+    opacity: 0.4;
+    filter: blur(60px);
+}
+
+.auth-bg-circle-1 {
+    width: 300px;
+    height: 300px;
+    top: -100px;
+    right: -50px;
+}
+
+.auth-bg-circle-2 {
+    width: 200px;
+    height: 200px;
+    bottom: -80px;
+    left: -50px;
+}
+
+.auth-bg-circle-3 {
+    width: 150px;
+    height: 150px;
+    top: 40%;
+    left: 40%;
+}
+
+.auth-container {
     position: relative;
     z-index: 1;
+    width: 100%;
+    max-width: 440px;
+    background: var(--bg-elevated);
+    border-radius: var(--radius-2xl);
+    box-shadow: var(--shadow-xl);
+    padding: var(--space-8);
 }
 
-.auth-logo {
+.auth-header {
     text-align: center;
-    margin-bottom: var(--space-xl);
+    margin-bottom: var(--space-8);
 }
 
-.auth-logo svg {
-    color: var(--color-primary);
-    margin-bottom: var(--space-sm);
+.auth-logo {
+    width: 64px;
+    height: 64px;
+    margin: 0 auto var(--space-4);
+    background: var(--primary);
+    color: white;
+    border-radius: var(--radius-xl);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 1.75rem;
+    box-shadow: var(--shadow-lg);
 }
 
-.auth-logo h1 {
+.auth-title {
     font-size: 1.75rem;
     font-weight: 700;
-    color: var(--color-text);
-    margin-bottom: var(--space-xs);
+    margin-bottom: var(--space-1);
 }
 
 .auth-subtitle {
     font-size: 0.875rem;
-    color: var(--color-text-secondary);
+    color: var(--text-secondary);
 }
 
 .auth-tabs {
     display: flex;
-    gap: var(--space-xs);
-    margin-bottom: var(--space-xl);
-    background: var(--color-bg-tertiary);
-    padding: var(--space-xs);
+    gap: var(--space-2);
+    margin-bottom: var(--space-6);
+    background: var(--bg-tertiary);
+    padding: var(--space-1);
     border-radius: var(--radius-md);
 }
 
 .auth-tab {
     flex: 1;
-    padding: var(--space-sm) var(--space-md);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: var(--space-2);
+    padding: var(--space-2) var(--space-4);
     font-size: 0.875rem;
     font-weight: 500;
-    color: var(--color-text-secondary);
+    color: var(--text-secondary);
     background: transparent;
     border: none;
     border-radius: var(--radius-sm);
@@ -285,8 +667,8 @@ select.input {
 }
 
 .auth-tab.active {
-    background: var(--color-bg);
-    color: var(--color-text);
+    background: var(--bg-elevated);
+    color: var(--text);
     box-shadow: var(--shadow-sm);
 }
 
@@ -298,280 +680,357 @@ select.input {
     display: block;
 }
 
-.auth-form .btn {
-    width: 100%;
-    margin-top: var(--space-md);
-}
-
-.error-message {
-    margin-top: var(--space-md);
-    padding: var(--space-sm) var(--space-md);
-    background: #FEF2F2;
-    color: #DC2626;
-    border: 1px solid #FCA5A5;
-    border-radius: var(--radius-md);
-    font-size: 0.875rem;
-    display: none;
-}
-
-.error-message:not(:empty) {
-    display: block;
+.auth-loading {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: var(--space-2);
+    margin-top: var(--space-4);
+    color: var(--text-secondary);
 }
 
-/* =============================================
-   Chat Screen
-   ============================================= */
-#chat-screen {
+.auth-loading.hidden {
     display: none;
-    height: 100vh;
-    flex-direction: column;
 }
 
-#chat-screen.active {
-    display: flex;
-}
-
-/* Header */
+/* ========== CHAT HEADER ========== */
 .chat-header {
     display: flex;
     align-items: center;
     justify-content: space-between;
-    padding: var(--space-md) var(--space-lg);
+    padding: 0 var(--space-4);
+    height: var(--header-height);
     background: var(--header-bg);
     border-bottom: 1px solid var(--header-border);
-    min-height: 64px;
     flex-shrink: 0;
+    z-index: 10;
 }
 
-.header-center {
-    text-align: center;
+.header-section {
+    display: flex;
+    align-items: center;
+    gap: var(--space-3);
 }
 
-.chat-title {
-    font-size: 1.0625rem;
+.header-avatar-img {
+    width: 40px;
+    height: 40px;
+    border-radius: var(--radius-full);
+    object-fit: cover;
+    border: 2px solid var(--border);
+}
+
+.header-avatar-img.hidden,
+#header-avatar-placeholder.hidden {
+    display: none;
+}
+
+.header-info {
+    display: flex;
+    flex-direction: column;
+}
+
+.header-name {
+    font-size: 1rem;
     font-weight: 600;
     line-height: 1.3;
 }
 
-.online-count {
+.header-status {
     font-size: 0.75rem;
-    color: var(--color-text-secondary);
+    color: var(--text-secondary);
+    display: flex;
+    align-items: center;
+    gap: var(--space-1);
 }
 
-.icon-btn {
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-    width: 40px;
-    height: 40px;
-    background: transparent;
-    border: none;
-    border-radius: var(--radius-md);
-    color: var(--color-text-secondary);
-    cursor: pointer;
-    transition: all var(--transition-fast);
+.status-dot {
+    width: 8px;
+    height: 8px;
+    border-radius: 50%;
+    background: var(--text-tertiary);
 }
 
-.icon-btn:hover {
-    background: var(--color-bg-tertiary);
-    color: var(--color-text);
+.status-dot.online {
+    background: var(--success);
 }
 
-/* Typing Indicator */
-.typing-indicator {
+/* Connection Status */
+.connection-status {
     height: 28px;
+    padding: 0 var(--space-4);
+    background: var(--bg-secondary);
+    border-bottom: 1px solid var(--border-light);
     display: flex;
     align-items: center;
-    padding: 0 var(--space-lg);
-    font-size: 0.8125rem;
-    color: var(--color-text-secondary);
-    background: var(--color-bg);
-    border-bottom: 1px solid var(--color-border-light);
-    flex-shrink: 0;
+    gap: var(--space-2);
+    font-size: 0.75rem;
+    color: var(--text-secondary);
+}
+
+.connection-status .fa-wifi {
+    font-size: 0.875rem;
 }
 
-/* Messages Container */
+.connection-status.reconnecting {
+    color: var(--warning);
+}
+
+.connection-status.connected {
+    color: var(--success);
+}
+
+.connection-status.disconnected {
+    color: var(--error);
+}
+
+/* ========== MESSAGES CONTAINER ========== */
 .messages-container {
     flex: 1;
+    overflow: hidden;
+    position: relative;
+    background: var(--bg);
+}
+
+.messages-scroll {
+    height: 100%;
     overflow-y: auto;
-    padding: var(--space-md);
-    background: var(--color-bg);
-    display: flex;
-    flex-direction: column;
+    padding: var(--space-4);
+    scroll-behavior: smooth;
+}
+
+.load-more {
+    text-align: center;
+    margin-bottom: var(--space-4);
+}
+
+.load-more .btn {
+    font-size: 0.8125rem;
 }
 
 .messages-list {
     display: flex;
     flex-direction: column;
-    gap: var(--space-xs);
-    padding-bottom: var(--space-md);
+    gap: var(--space-2);
+    min-height: 100%;
 }
 
-.load-more {
+.empty-state {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    padding: var(--space-12) var(--space-4);
     text-align: center;
-    padding: var(--space-md);
+    color: var(--text-secondary);
+    opacity: 0.7;
+    height: 100%;
 }
 
-.load-more .btn {
-    font-size: 0.8125rem;
-    padding: var(--space-sm) var(--space-md);
+.empty-icon {
+    font-size: 3rem;
+    margin-bottom: var(--space-4);
+    color: var(--text-tertiary);
 }
 
-/* Message Bubbles */
-.message-bubble {
-    max-width: 75%;
-    margin-bottom: var(--space-xs);
-    animation: messageSlideIn 0.3s ease;
+.empty-state h3 {
+    margin-bottom: var(--space-1);
+    font-size: 1.125rem;
 }
 
-@keyframes messageSlideIn {
-    from {
-        opacity: 0;
-        transform: translateY(8px);
-    }
-    to {
-        opacity: 1;
-        transform: translateY(0);
-    }
+.empty-state p {
+    font-size: 0.875rem;
 }
 
-.message-self {
-    align-self: flex-end;
+/* Scroll to bottom button */
+.scroll-bottom-btn {
+    position: absolute;
+    bottom: var(--space-4);
+    right: var(--space-4);
+    width: 36px;
+    height: 36px;
+    background: var(--bg-elevated);
+    border: 1px solid var(--border);
+    border-radius: var(--radius-full);
+    box-shadow: var(--shadow-md);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    cursor: pointer;
+    transition: all var(--transition-fast);
+    z-index: 5;
+    color: var(--text-secondary);
 }
 
-.message-other {
-    align-self: flex-start;
+.scroll-bottom-btn:hover {
+    background: var(--bg-tertiary);
+    transform: scale(1.05);
 }
 
-.message-content {
-    position: relative;
+/* ========== MESSAGE BUBBLES ========== */
+.message-wrapper {
+    display: flex;
+    flex-direction: column;
+    animation: messageSlide 0.3s ease;
+}
+
+.message-wrapper.self {
+    align-items: flex-end;
+}
+
+.message-wrapper.other {
+    align-items: flex-start;
+}
+
+.message-sender {
+    font-size: 0.75rem;
+    font-weight: 500;
+    margin-bottom: var(--space-1);
+    color: var(--primary);
+    padding: 0 var(--space-3);
+}
+
+.message-bubble {
+    max-width: 75%;
     padding: 0.625rem 1rem;
     border-radius: var(--radius-lg);
     word-wrap: break-word;
+    overflow-wrap: break-word;
     white-space: pre-wrap;
+    line-height: 1.5;
+    position: relative;
 }
 
-.message-self .message-content {
+.message-self .message-bubble {
     background: var(--bubble-self);
     color: var(--bubble-self-text);
     border-bottom-right-radius: var(--radius-sm);
+    margin-right: var(--space-1);
 }
 
-.message-other .message-content {
+.message-other .message-bubble {
     background: var(--bubble-other);
     color: var(--bubble-other-text);
     border-bottom-left-radius: var(--radius-sm);
+    margin-left: var(--space-1);
 }
 
-.message-info {
-    display: flex;
-    align-items: center;
-    gap: var(--space-sm);
-    margin-bottom: var(--space-xs);
-    font-size: 0.75rem;
+.message-bubble.deleted {
+    opacity: 0.6;
+    font-style: italic;
 }
 
-.message-self .message-info {
-    justify-content: flex-end;
+.message-text {
+    font-size: 0.9375rem;
 }
 
-.sender-name {
-    font-weight: 600;
-    color: var(--color-primary);
+.message-meta {
+    display: flex;
+    align-items: center;
+    gap: var(--space-2);
+    margin-top: var(--space-1);
+    font-size: 0.6875rem;
 }
 
-.message-other .sender-name {
-    color: var(--color-text);
+.message-self .message-meta {
+    justify-content: flex-end;
+    color: var(--bubble-self-text);
+    opacity: 0.8;
 }
 
-.timestamp {
-    color: var(--color-text-tertiary);
-    font-size: 0.6875rem;
+.message-other .message-meta {
+    color: var(--text-tertiary);
 }
 
-.message-text {
-    font-size: 0.9375rem;
-    line-height: 1.5;
+.message-time {
+    white-space: nowrap;
 }
 
 .message-status {
     display: inline-flex;
     align-items: center;
-    margin-left: var(--space-xs);
-    font-size: 0.75rem;
-    color: var(--color-text-tertiary);
+    gap: 2px;
+}
+
+.message-status .fa-check {
+    font-size: 0.625rem;
 }
 
 .message-status.read {
-    color: var(--color-primary);
+    color: var(--primary);
 }
 
 .message-actions {
     display: flex;
-    gap: var(--space-xs);
-    margin-top: var(--space-xs);
+    gap: 2px;
+    margin-top: var(--space-1);
     opacity: 0;
     transition: opacity var(--transition-fast);
 }
 
-.message-bubble:hover .message-actions {
+.message-wrapper:hover .message-actions {
     opacity: 1;
 }
 
 .message-actions button {
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
     width: 28px;
     height: 28px;
-    background: var(--color-bg-secondary);
-    border: 1px solid var(--color-border);
+    background: transparent;
+    border: none;
     border-radius: var(--radius-sm);
-    color: var(--color-text-secondary);
+    color: inherit;
     cursor: pointer;
     font-size: 0.75rem;
     transition: all var(--transition-fast);
+    display: flex;
+    align-items: center;
+    justify-content: center;
 }
 
-.message-actions button:hover {
-    background: var(--color-bg-tertiary);
-    color: var(--color-text);
+.message-other .message-actions button {
+    color: var(--text-secondary);
+}
+
+.message-other .message-actions button:hover {
+    background: var(--bg-tertiary);
+    color: var(--text);
+}
+
+.message-self .message-actions button:hover {
+    background: rgba(255,255,255,0.2);
 }
 
 /* Reply Indicator */
 .reply-indicator {
     display: flex;
     align-items: center;
-    gap: var(--space-sm);
-    padding: var(--space-xs) var(--space-sm);
-    margin-bottom: var(--space-xs);
-    font-size: 0.8125rem;
-    color: var(--color-text-secondary);
-    background: var(--color-bg-tertiary);
+    gap: var(--space-2);
+    padding: var(--space-1) var(--space-2);
+    margin-bottom: var(--space-2);
+    font-size: 0.75rem;
+    background: rgba(0,0,0,0.05);
     border-radius: var(--radius-sm);
-    border-left: 3px solid var(--color-primary);
+    border-left: 3px solid var(--primary);
 }
 
-.reply-arrow {
-    font-size: 0.75rem;
-    line-height: 1;
+.message-self .reply-indicator {
+    background: rgba(255,255,255,0.1);
 }
 
 /* Attachments */
 .attachment {
-    margin-top: var(--space-sm);
+    margin-top: var(--space-2);
+    border-radius: var(--radius-md);
+    overflow: hidden;
 }
 
 .attachment img {
     max-width: 100%;
     max-height: 300px;
+    object-fit: cover;
     border-radius: var(--radius-md);
     cursor: pointer;
-    transition: transform var(--transition-fast);
-}
-
-.attachment img:hover {
-    transform: scale(1.02);
+    display: block;
 }
 
 .attachment video {
@@ -582,67 +1041,122 @@ select.input {
 
 .attachment audio {
     width: 100%;
-    margin-top: var(--space-xs);
 }
 
-.attachment .file-preview {
+.attachment-file {
     display: flex;
     align-items: center;
-    gap: var(--space-sm);
-    padding: var(--space-sm) var(--space-md);
-    background: var(--color-bg-secondary);
-    border: 1px solid var(--color-border);
+    gap: var(--space-2);
+    padding: var(--space-2) var(--space-3);
+    background: var(--bg-secondary);
     border-radius: var(--radius-md);
     cursor: pointer;
     transition: all var(--transition-fast);
 }
 
-.attachment .file-preview:hover {
-    background: var(--color-bg-tertiary);
-    border-color: var(--color-primary);
+.attachment-file:hover {
+    background: var(--bg-tertiary);
 }
 
-.file-icon {
-    font-size: 1.25rem;
-    line-height: 1;
+.attachment-file .fa-file {
+    font-size: 1.5rem;
+    color: var(--primary);
+}
+
+.file-info {
+    flex: 1;
+    min-width: 0;
 }
 
 .file-name {
     font-size: 0.875rem;
-    color: var(--color-primary);
-    text-decoration: underline;
+    font-weight: 500;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
 }
 
-.edited-label {
+.file-size {
     font-size: 0.75rem;
+    color: var(--text-tertiary);
+}
+
+.edited-label {
+    font-size: 0.6875rem;
     font-style: italic;
     opacity: 0.7;
-    margin-left: var(--space-xs);
+    margin-left: var(--space-1);
 }
 
-.deleted-message {
-    font-style: italic;
-    color: var(--color-text-tertiary);
-    padding: 0.5rem 1rem;
+@keyframes messageSlide {
+    from {
+        opacity: 0;
+        transform: translateY(10px);
+    }
+    to {
+        opacity: 1;
+        transform: translateY(0);
+    }
+}
+
+/* ========== TYPING INDICATOR ========== */
+.typing-indicator {
+    padding: var(--space-2) var(--space-4);
+    background: var(--bg-secondary);
+    border-top: 1px solid var(--border-light);
+    display: flex;
+    align-items: center;
+    gap: var(--space-2);
+    height: 36px;
+    flex-shrink: 0;
+}
+
+.typing-dots {
+    display: flex;
+    gap: 3px;
+}
+
+.typing-dot {
+    width: 6px;
+    height: 6px;
+    border-radius: 50%;
+    background: var(--text-tertiary);
+    animation: typingBounce 1.4s infinite ease-in-out both;
+}
+
+.typing-dot:nth-child(1) { animation-delay: -0.32s; }
+.typing-dot:nth-child(2) { animation-delay: -0.16s; }
+
+@keyframes typingBounce {
+    0%, 80%, 100% { transform: scale(0); }
+    40% { transform: scale(1); }
+}
+
+.typing-text {
+    font-size: 0.8125rem;
+    color: var(--text-secondary);
 }
 
-/* =============================================
-   Reply Preview
-   ============================================= */
+/* ========== REPLY PREVIEW ========== */
 .reply-preview {
+    flex-shrink: 0;
+    border-top: 1px solid var(--border-light);
+}
+
+.reply-bar {
     display: flex;
     align-items: center;
-    justify-content: space-between;
-    padding: var(--space-sm) var(--space-lg);
-    background: var(--color-bg-secondary);
-    border-top: 1px solid var(--color-border);
+    gap: var(--space-3);
+    padding: var(--space-2) var(--space-4);
+    background: var(--bg-secondary);
+}
+
+.reply-icon {
+    color: var(--text-secondary);
     flex-shrink: 0;
 }
 
 .reply-content {
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-xs);
     flex: 1;
     min-width: 0;
 }
@@ -650,387 +1164,611 @@ select.input {
 .reply-label {
     font-size: 0.75rem;
     font-weight: 600;
-    color: var(--color-primary);
+    color: var(--primary);
 }
 
 .reply-text {
     font-size: 0.8125rem;
-    color: var(--color-text-secondary);
+    color: var(--text-secondary);
+    display: block;
     overflow: hidden;
     text-overflow: ellipsis;
-    white-space: nowrap;
-}
-
-.cancel-reply {
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-    width: 32px;
-    height: 32px;
-    background: transparent;
-    border: none;
-    border-radius: var(--radius-sm);
-    color: var(--color-text-secondary);
-    cursor: pointer;
-    flex-shrink: 0;
-    transition: all var(--transition-fast);
-}
-
-.cancel-reply:hover {
-    background: var(--color-bg-tertiary);
-    color: var(--color-text);
+    white-space: nowrap;
 }
 
-/* =============================================
-   Compose Area
-   ============================================= */
-.compose-container {
+/* ========== COMPOSE AREA ========== */
+.compose-area {
     flex-shrink: 0;
-    border-top: 1px solid var(--color-border);
-    background: var(--color-bg);
+    border-top: 1px solid var(--border);
+    background: var(--bg-elevated);
 }
 
 .compose-form {
     display: flex;
     align-items: flex-end;
-    gap: var(--space-sm);
-    padding: var(--space-sm) var(--space-md);
+    padding: var(--space-2) var(--space-3);
+    gap: var(--space-2);
 }
 
-.attach-btn {
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-    width: 40px;
-    height: 40px;
-    background: transparent;
-    border: none;
-    border-radius: var(--radius-full);
-    color: var(--color-text-secondary);
-    cursor: pointer;
-    flex-shrink: 0;
-    transition: all var(--transition-fast);
+.compose-tools {
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+    padding-bottom: var(--space-1);
 }
 
-.attach-btn:hover {
-    background: var(--color-bg-tertiary);
-    color: var(--color-text);
+.input-area {
+    flex: 1;
 }
 
 .message-input {
-    flex: 1;
+    width: 100%;
     resize: none;
     padding: 0.625rem 1rem;
     font-size: 0.9375rem;
     font-family: inherit;
-    color: var(--color-text);
+    color: var(--input-text);
     background: var(--input-bg);
     border: 1px solid var(--input-border);
     border-radius: var(--radius-xl);
     outline: none;
     min-height: 40px;
     max-height: 120px;
-    transition: all var(--transition-fast);
     line-height: 1.5;
+    transition: all var(--transition-fast);
+    overflow-y: auto;
 }
 
 .message-input:focus {
-    border-color: var(--input-focus);
-    box-shadow: 0 0 0 3px var(--color-primary-light);
+    border-color: var(--border-focus);
+    box-shadow: 0 0 0 3px var(--primary-light);
 }
 
 .message-input::placeholder {
-    color: var(--color-text-tertiary);
+    color: var(--input-placeholder);
 }
 
-.send-btn {
-    display: inline-flex;
+.upload-preview {
+    display: flex;
     align-items: center;
-    justify-content: center;
-    width: 40px;
-    height: 40px;
-    background: var(--color-primary);
-    border: none;
-    border-radius: var(--radius-full);
-    color: white;
-    cursor: pointer;
-    flex-shrink: 0;
-    transition: all var(--transition-fast);
-    box-shadow: var(--shadow-sm);
-}
-
-.send-btn:hover:not(:disabled) {
-    background: var(--color-primary-dark);
-    box-shadow: var(--shadow-md);
-    transform: scale(1.05);
+    justify-content: space-between;
+    padding: var(--space-2) var(--space-4);
+    background: var(--bg-secondary);
+    border-bottom: 1px solid var(--border-light);
 }
 
-.send-btn:disabled {
-    opacity: 0.5;
-    cursor: not-allowed;
+.upload-info {
+    display: flex;
+    align-items: center;
+    gap: var(--space-2);
+    font-size: 0.8125rem;
 }
 
-/* Upload Progress */
 .upload-progress {
+    padding: var(--space-2) var(--space-4);
+    background: var(--bg-secondary);
     display: flex;
     align-items: center;
-    gap: var(--space-sm);
-    padding: var(--space-sm) var(--space-md);
-    background: var(--color-bg-secondary);
-}
-
-.upload-progress.hidden {
-    display: none;
+    gap: var(--space-3);
 }
 
-.progress-bar {
+.progress-track {
     flex: 1;
     height: 4px;
-    background: var(--color-bg-tertiary);
+    background: var(--border);
     border-radius: var(--radius-full);
     overflow: hidden;
 }
 
 .progress-fill {
     height: 100%;
-    background: var(--color-primary);
+    background: var(--primary);
     border-radius: var(--radius-full);
-    transition: width var(--transition-normal);
+    transition: width var(--transition);
 }
 
-.upload-filename {
-    font-size: 0.8125rem;
-    color: var(--color-text-secondary);
-    white-space: nowrap;
-    overflow: hidden;
-    text-overflow: ellipsis;
+.progress-text {
+    font-size: 0.75rem;
+    font-weight: 500;
+    color: var(--text-secondary);
+    min-width: 36px;
 }
 
-/* =============================================
-   Modal
-   ============================================= */
+/* ========== MODALS ========== */
 .modal {
     position: fixed;
-    top: 0;
-    left: 0;
-    width: 100%;
-    height: 100%;
+    inset: 0;
+    z-index: 100;
     display: flex;
     align-items: center;
     justify-content: center;
-    z-index: 1000;
-    padding: var(--space-md);
+    padding: var(--space-4);
+    visibility: hidden;
+    opacity: 0;
+    transition: all var(--transition);
 }
 
-.modal.hidden {
-    display: none;
+.modal:not(.hidden) {
+    visibility: visible;
+    opacity: 1;
 }
 
-.modal-overlay {
+.modal-backdrop {
     position: absolute;
-    top: 0;
-    left: 0;
-    width: 100%;
-    height: 100%;
-    background: rgba(0, 0, 0, 0.5);
+    inset: 0;
+    background: rgba(0,0,0,0.5);
     backdrop-filter: blur(4px);
 }
 
-.modal-content {
+.modal-container {
     position: relative;
     width: 100%;
-    max-width: 480px;
-    max-height: 85vh;
-    background: var(--color-bg);
+    max-width: 520px;
+    max-height: 90vh;
+    background: var(--bg-elevated);
     border-radius: var(--radius-xl);
-    box-shadow: var(--shadow-lg);
+    box-shadow: var(--shadow-xl);
     overflow: hidden;
-    animation: modalSlideIn 0.2s ease;
+    display: flex;
+    flex-direction: column;
 }
 
-@keyframes modalSlideIn {
-    from {
-        opacity: 0;
-        transform: scale(0.95) translateY(10px);
-    }
-    to {
-        opacity: 1;
-        transform: scale(1) translateY(0);
-    }
+.modal-sm {
+    max-width: 400px;
 }
 
 .modal-header {
     display: flex;
     align-items: center;
     justify-content: space-between;
-    padding: var(--space-lg);
-    border-bottom: 1px solid var(--color-border);
+    padding: var(--space-4) var(--space-6);
+    border-bottom: 1px solid var(--border);
 }
 
 .modal-header h2 {
-    font-size: 1.25rem;
+    font-size: 1.125rem;
     font-weight: 600;
 }
 
+.modal-header h2 i {
+    margin-right: var(--space-2);
+    color: var(--primary);
+}
+
 .modal-body {
-    padding: var(--space-lg);
+    padding: var(--space-6);
     overflow-y: auto;
-    max-height: calc(85vh - 140px);
+    flex: 1;
 }
 
 .modal-footer {
+    padding: var(--space-4) var(--space-6);
+    border-top: 1px solid var(--border);
     display: flex;
     justify-content: flex-end;
-    padding: var(--space-md) var(--space-lg);
-    border-top: 1px solid var(--color-border);
-    background: var(--color-bg-secondary);
+    gap: var(--space-2);
+    background: var(--bg-secondary);
 }
 
-.setting-section {
-    margin-bottom: var(--space-xl);
+/* Settings Styles */
+.settings-section {
+    margin-bottom: var(--space-8);
 }
 
-.setting-section:last-child {
+.settings-section:last-child {
     margin-bottom: 0;
 }
 
-.setting-section h3 {
-    font-size: 0.875rem;
+.settings-section h3 {
+    font-size: 0.75rem;
     font-weight: 600;
-    color: var(--color-text-secondary);
     text-transform: uppercase;
     letter-spacing: 0.05em;
-    margin-bottom: var(--space-md);
-    padding-bottom: var(--space-sm);
-    border-bottom: 1px solid var(--color-border-light);
+    color: var(--text-secondary);
+    margin-bottom: var(--space-4);
+    padding-bottom: var(--space-2);
+    border-bottom: 1px solid var(--border-light);
+}
+
+.settings-row {
+    margin-bottom: var(--space-4);
+}
+
+.avatar-section {
+    display: flex;
+    align-items: center;
+    gap: var(--space-4);
+    margin-bottom: var(--space-4);
+}
+
+.settings-avatar {
+    width: 72px;
+    height: 72px;
+    border-radius: var(--radius-full);
+    background: var(--bg-tertiary);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 2rem;
+    color: var(--text-secondary);
+    overflow: hidden;
+}
+
+.settings-avatar-img {
+    width: 72px;
+    height: 72px;
+    border-radius: var(--radius-full);
+    object-fit: cover;
+}
+
+.theme-selector {
+    display: grid;
+    grid-template-columns: repeat(3, 1fr);
+    gap: var(--space-3);
+    margin-top: var(--space-2);
+}
+
+.theme-option {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: var(--space-2);
+    padding: var(--space-3);
+    background: var(--bg-secondary);
+    border: 2px solid var(--border);
+    border-radius: var(--radius-md);
+    cursor: pointer;
+    transition: all var(--transition-fast);
+    font-size: 0.75rem;
+    font-weight: 500;
+    text-align: center;
+}
+
+.theme-option.active {
+    border-color: var(--primary);
+    background: var(--primary-light);
+}
+
+.theme-preview {
+    width: 60px;
+    height: 40px;
+    border-radius: var(--radius-sm);
+    overflow: hidden;
+    border: 1px solid var(--border);
+}
+
+.theme-preview-header {
+    height: 8px;
+    background: var(--bg-secondary);
+}
+
+.theme-preview-body {
+    padding: 4px;
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+}
+
+.theme-preview-message {
+    height: 6px;
+    border-radius: 3px;
+    width: 70%;
+}
+
+.theme-preview-message.self {
+    background: var(--primary);
+    align-self: flex-end;
+}
+
+.theme-preview-message.other {
+    background: var(--bg-tertiary);
+}
+
+.theme-preview-light {
+    background: #FFFFFF;
 }
 
-.setting-item {
-    margin-bottom: var(--space-md);
+.theme-preview-dark {
+    background: #1F2937;
 }
 
-.setting-item label {
+.theme-preview-light .theme-preview-header { background: #F9FAFB; }
+.theme-preview-dark .theme-preview-header { background: #111827; }
+
+.theme-preview-light .theme-preview-message.other { background: #F3F4F6; }
+.theme-preview-dark .theme-preview-message.other { background: #374151; }
+
+.custom-theme-section {
+    margin-top: var(--space-4);
+    padding: var(--space-4);
+    background: var(--bg-secondary);
+    border-radius: var(--radius-md);
+    border: 1px solid var(--border);
+}
+
+.color-picker-row {
+    display: grid;
+    grid-template-columns: repeat(3, 1fr);
+    gap: var(--space-4);
+}
+
+.color-picker-group label {
     display: block;
-    font-size: 0.875rem;
+    font-size: 0.75rem;
     font-weight: 500;
-    margin-bottom: var(--space-xs);
-    color: var(--color-text);
+    margin-bottom: var(--space-2);
 }
 
 .color-input-wrapper {
     display: flex;
     align-items: center;
-    gap: var(--space-sm);
+    gap: var(--space-2);
 }
 
 .color-input-wrapper input[type="color"] {
-    width: 40px;
-    height: 40px;
+    width: 36px;
+    height: 36px;
+    border: 1px solid var(--border);
+    border-radius: var(--radius-sm);
     padding: 2px;
-    border: 1px solid var(--color-border);
-    border-radius: var(--radius-md);
     cursor: pointer;
     background: none;
 }
 
-.color-input-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
-    padding: 0;
+.color-hex {
+    font-size: 0.75rem;
+    font-family: var(--font-mono);
+    color: var(--text-secondary);
 }
 
-.color-input-wrapper input[type="color"]::-webkit-color-swatch {
-    border: none;
-    border-radius: var(--radius-sm);
+.about-info {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-3);
 }
 
-.avatar-upload {
+.about-row {
     display: flex;
+    justify-content: space-between;
     align-items: center;
-    gap: var(--space-md);
+    padding: var(--space-2) 0;
+    border-bottom: 1px solid var(--border-light);
+    font-size: 0.875rem;
 }
 
-.avatar-preview {
-    width: 64px;
-    height: 64px;
+.about-row:last-child {
+    border-bottom: none;
+}
+
+/* Online Users Modal */
+.online-users-list {
+    max-height: 300px;
+    overflow-y: auto;
+}
+
+.loading-state {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: var(--space-2);
+    padding: var(--space-8);
+    color: var(--text-secondary);
+}
+
+.user-item {
+    display: flex;
+    align-items: center;
+    gap: var(--space-3);
+    padding: var(--space-2) var(--space-4);
+    transition: background var(--transition-fast);
+}
+
+.user-item:hover {
+    background: var(--bg-secondary);
+}
+
+.user-avatar {
+    width: 40px;
+    height: 40px;
     border-radius: var(--radius-full);
+    background: var(--bg-tertiary);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    color: var(--text-secondary);
+    font-size: 1rem;
+    overflow: hidden;
+}
+
+.user-avatar img {
+    width: 100%;
+    height: 100%;
     object-fit: cover;
-    border: 2px solid var(--color-border);
 }
 
-.avatar-preview:not([style*="display: block"]) {
-    display: none;
+.user-info {
+    flex: 1;
 }
 
-.custom-theme {
-    padding: var(--space-md);
-    background: var(--color-bg-secondary);
-    border-radius: var(--radius-md);
-    margin-top: var(--space-sm);
+.user-name {
+    font-weight: 500;
+    font-size: 0.875rem;
 }
 
-/* =============================================
-   Utility Classes
-   ============================================= */
-.hidden {
-    display: none !important;
+.user-status-text {
+    font-size: 0.75rem;
+    color: var(--text-secondary);
 }
 
-.screen {
-    display: none;
-    height: 100vh;
+/* Emoji Picker */
+.emoji-picker {
+    position: fixed;
+    bottom: 100px;
+    left: 50%;
+    transform: translateX(-50%);
+    z-index: 50;
+    background: var(--bg-elevated);
+    border: 1px solid var(--border);
+    border-radius: var(--radius-lg);
+    box-shadow: var(--shadow-xl);
+    width: 320px;
+    max-height: 350px;
+    overflow: hidden;
 }
 
-.screen.active {
+.emoji-header {
+    border-bottom: 1px solid var(--border);
+    padding: var(--space-2);
+}
+
+.emoji-categories {
     display: flex;
+    gap: 2px;
 }
 
-/* =============================================
-   Scrollbar Styles
-   ============================================= */
-.messages-container::-webkit-scrollbar {
-    width: 6px;
+.emoji-cat {
+    width: 36px;
+    height: 36px;
+    border: none;
+    background: transparent;
+    border-radius: var(--radius-sm);
+    cursor: pointer;
+    color: var(--text-secondary);
+    font-size: 0.875rem;
+    transition: all var(--transition-fast);
+}
+
+.emoji-cat.active {
+    background: var(--primary-light);
+    color: var(--primary);
+}
+
+.emoji-cat:hover {
+    background: var(--bg-tertiary);
+}
+
+.emoji-grid {
+    padding: var(--space-2);
+    display: grid;
+    grid-template-columns: repeat(8, 1fr);
+    gap: 2px;
+    max-height: 280px;
+    overflow-y: auto;
 }
 
-.messages-container::-webkit-scrollbar-track {
+.emoji-item {
+    width: 36px;
+    height: 36px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 1.25rem;
+    cursor: pointer;
+    border-radius: var(--radius-sm);
+    border: none;
     background: transparent;
+    transition: background var(--transition-fast);
 }
 
-.messages-container::-webkit-scrollbar-thumb {
-    background: var(--color-border);
-    border-radius: var(--radius-full);
+.emoji-item:hover {
+    background: var(--bg-tertiary);
+}
+
+/* Toast Notifications */
+.toast-container {
+    position: fixed;
+    top: var(--space-4);
+    right: var(--space-4);
+    z-index: 200;
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-2);
+    max-width: 360px;
+}
+
+.toast {
+    padding: var(--space-3) var(--space-4);
+    background: var(--bg-elevated);
+    border: 1px solid var(--border);
+    border-radius: var(--radius-md);
+    box-shadow: var(--shadow-md);
+    display: flex;
+    align-items: center;
+    gap: var(--space-3);
+    animation: toastSlide 0.3s ease;
+    font-size: 0.875rem;
+}
+
+.toast.toast-success {
+    border-left: 3px solid var(--success);
+}
+
+.toast.toast-error {
+    border-left: 3px solid var(--error);
+}
+
+.toast.toast-warning {
+    border-left: 3px solid var(--warning);
+}
+
+.toast.toast-info {
+    border-left: 3px solid var(--info);
+}
+
+@keyframes toastSlide {
+    from {
+        transform: translateX(100%);
+        opacity: 0;
+    }
+    to {
+        transform: translateX(0);
+        opacity: 1;
+    }
 }
 
-.messages-container::-webkit-scrollbar-thumb:hover {
-    background: var(--color-text-tertiary);
+/* ========== UTILITY ========== */
+.hidden {
+    display: none !important;
 }
 
-/* =============================================
-   Responsive Design
-   ============================================= */
+/* ========== RESPONSIVE ========== */
 @media (max-width: 640px) {
     .auth-container {
-        padding: var(--space-lg);
-        border-radius: var(--radius-lg);
-    }
-    
-    .chat-header {
-        padding: var(--space-sm) var(--space-md);
+        padding: var(--space-6);
+        border-radius: var(--radius-xl);
     }
     
     .message-bubble {
         max-width: 85%;
     }
     
+    .compose-form {
+        padding: var(--space-1) var(--space-2);
+    }
+    
     .modal {
         padding: 0;
+        align-items: flex-end;
+    }
+    
+    .modal-container {
+        max-height: 85vh;
+        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
+    }
+    
+    .color-picker-row {
+        grid-template-columns: 1fr;
     }
     
-    .modal-content {
-        max-height: 100vh;
-        border-radius: 0;
+    .theme-selector {
+        grid-template-columns: 1fr;
     }
     
-    .modal-body {
-        max-height: calc(100vh - 140px);
+    .emoji-picker {
+        left: 8px;
+        right: 8px;
+        transform: none;
+        width: auto;
     }
 }
 
@@ -1040,7 +1778,7 @@ select.input {
     }
     
     .compose-form {
-        padding: var(--space-sm) var(--space-lg);
+        padding: var(--space-2) var(--space-4);
     }
 }