static/style.css

/* ==============================================
   InfinityChat — Full Design System
   All colours flow from :root variables only.
   No hardcoded light/dark splits on elements.
   ============================================== */

/* ---- Light Theme (default on :root) ---- */
:root {
    --primary:          #2563EB;
    --primary-hover:    #1D4ED8;
    --primary-light:    #DBEAFE;
    --primary-dark:     #1E40AF;

    --bg:               #FFFFFF;
    --bg-secondary:     #F9FAFB;
    --bg-tertiary:      #F3F4F6;
    --bg-elevated:      #FFFFFF;

    --text:             #111827;
    --text-secondary:   #4B5563;
    --text-tertiary:    #9CA3AF;
    --text-inverse:     #FFFFFF;

    --border:           #E5E7EB;
    --border-light:     #F3F4F6;

    --bubble-self:         #2563EB;
    --bubble-self-text:    #FFFFFF;
    --bubble-other:        #F3F4F6;
    --bubble-other-text:   #111827;

    --header-bg:        #FFFFFF;
    --header-border:    #E5E7EB;

    --input-bg:         #F3F4F6;
    --input-border:     #E5E7EB;
    --input-text:       #111827;
    --input-placeholder:#9CA3AF;

    --success:          #10B981;
    --warning:          #F59E0B;
    --error:            #EF4444;
    --info:             #3B82F6;

    --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.10), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.10), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.10), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.10), 0 10px 10px -5px rgba(0,0,0,0.04);

    --radius-xs:   4px;
    --radius-sm:   6px;
    --radius-md:   8px;
    --radius-lg:  12px;
    --radius-xl:  16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;

    --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);

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono:   'SF Mono', 'Fira Code', monospace;

    --header-height: 64px;
}

/* ---- Dark Theme ---- */
[data-theme="dark"] {
    --primary:          #60A5FA;
    --primary-hover:    #3B82F6;
    --primary-light:    #1E3A5F;
    --primary-dark:     #1D4ED8;

    --bg:               #0F172A;
    --bg-secondary:     #1E293B;
    --bg-tertiary:      #334155;
    --bg-elevated:      #1E293B;

    --text:             #F1F5F9;
    --text-secondary:   #94A3B8;
    --text-tertiary:    #64748B;
    --text-inverse:     #0F172A;

    --border:           #334155;
    --border-light:     #1E293B;

    --bubble-self:         #3B82F6;
    --bubble-self-text:    #FFFFFF;
    --bubble-other:        #334155;
    --bubble-other-text:   #F1F5F9;

    --header-bg:        #1E293B;
    --header-border:    #334155;

    --input-bg:         #334155;
    --input-border:     #475569;
    --input-text:       #F1F5F9;
    --input-placeholder:#64748B;

    --shadow-xs: 0 1px 2px rgba(0,0,0,0.4);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.5);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.5);
}

/* ---- Reset ---- */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    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;
    width: 100vw;
}

/* ---- 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; }

.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); }

/* ---- Screens ---- */
.screen { display:none; width:100%; height:100vh; }
.screen.active { display:flex; }
#chat-screen { flex-direction:column; }
.hidden { display:none !important; }

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    line-height: 1.4;
    position: relative;
    overflow: hidden;
}
.btn:disabled { opacity:0.6; cursor:not-allowed; pointer-events:none; }
.btn:active:not(:disabled) { transform: scale(0.98); }

.btn-primary {
    background: var(--primary);
    color: var(--text-inverse);
    border-color: var(--primary);
    box-shadow: var(--shadow-xs);
}
.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text);
    border-color: var(--border);
    box-shadow: var(--shadow-xs);
}
.btn-secondary:hover:not(:disabled) {
    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);
}

.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 {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
    padding: 0;
    border-radius: var(--radius-full);
    background: var(--primary);
    color: #fff;
    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;
}

.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: 1.0625rem;
    position: relative;
    flex-shrink: 0;
}
.btn-icon:hover { background: var(--bg-tertiary); color: var(--text); }
.btn-icon:active { transform: scale(0.94); }
.btn-icon-sm { width:32px; height:32px; font-size:0.875rem; }

.badge {
    position: absolute;
    top: 2px; right: 2px;
    min-width: 18px; height: 18px;
    padding: 0 4px;
    background: var(--error);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--header-bg);
}

/* ---- Forms ---- */
.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
}
.form-group label i { margin-right:0.25rem; color:var(--text-secondary); }
.input-wrapper { position:relative; display:flex; align-items:center; }
.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--input-text);
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-fast);
    line-height: 1.5;
}
.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
    background: var(--bg-elevated);
}
.form-input:disabled { opacity:0.6; cursor:not-allowed; }
.form-input::placeholder { color: var(--input-placeholder); }

.input-toggle {
    position: absolute;
    right: 0.5rem;
    width: 32px; height: 32px;
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
}
.input-toggle:hover { color: var(--text); background: var(--bg-tertiary); }

.form-hint { display:block; margin-top:0.25rem; 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 { display:flex; align-items:center; gap:0.5rem; margin-bottom:1rem; }
.strength-bar { flex:1; height:4px; background:var(--bg-tertiary); border-radius:var(--radius-full); overflow:hidden; }
.strength-fill { height:100%; width:0; 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:var(--info);     width:75%; }
.strength-fill.strong { background:var(--success);  width:100%; }
.strength-text { font-size:0.75rem; font-weight:500; color:var(--text-secondary); min-width:50px; }

/* Alert */
.alert {
    display: none;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    margin-top: 1rem;
}
.alert.visible { display:flex; }
.alert-error { background:#FEF2F2; color:#B91C1C; border:1px solid #FECACA; }
[data-theme="dark"] .alert-error { background:#2D1515; color:#FCA5A5; border-color:#7F1D1D; }

/* 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-secondary);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    overflow-y: auto;
}
.auth-bg { position:fixed; inset:0; pointer-events:none; overflow:hidden; z-index:0; }
.auth-bg-circle {
    position:absolute; border-radius:50%;
    background: var(--primary-light);
    opacity: 0.5; filter:blur(70px);
}
.auth-bg-circle-1 { width:350px; height:350px; top:-120px; right:-80px; }
.auth-bg-circle-2 { width:250px; height:250px; bottom:-100px; left:-60px; }
.auth-bg-circle-3 { width:180px; height:180px; top:45%; left:38%; }

.auth-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    background: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: 2.5rem 2rem;
    border: 1px solid var(--border);
}
.auth-header { text-align:center; margin-bottom:2rem; }
.auth-logo {
    width:64px; height:64px;
    margin:0 auto 1rem;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-xl);
    display:flex; align-items:center; justify-content:center;
    font-size:1.75rem;
    box-shadow: var(--shadow-lg);
}
.auth-title { font-size:1.75rem; font-weight:700; color:var(--text); margin-bottom:0.25rem; }
.auth-subtitle { font-size:0.875rem; color:var(--text-secondary); }
.auth-tabs {
    display:flex; gap:0.25rem;
    margin-bottom:1.5rem;
    background: var(--bg-tertiary);
    padding:0.25rem;
    border-radius: var(--radius-md);
}
.auth-tab {
    flex:1;
    display:flex; align-items:center; justify-content:center; gap:0.4rem;
    padding:0.5rem 1rem;
    font-size:0.875rem; font-weight:500;
    color: var(--text-secondary);
    background: transparent;
    border:none; border-radius:var(--radius-sm);
    cursor:pointer;
    transition: all var(--transition-fast);
}
.auth-tab.active {
    background: var(--bg-elevated);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}
.auth-form { display:none; }
.auth-form.active { display:block; }
.auth-form .btn-block { margin-top:0.5rem; }
.auth-loading {
    display:flex; align-items:center; justify-content:center;
    gap:0.5rem; margin-top:1rem; color:var(--text-secondary);
}
.auth-loading.hidden { display:none !important; }

/* ======= CHAT HEADER ======= */
.chat-header {
    display:flex; align-items:center; justify-content:space-between;
    padding:0 1rem;
    height: var(--header-height);
    background: var(--header-bg);
    border-bottom:1px solid var(--header-border);
    flex-shrink:0;
    z-index:10;
}
.header-section { display:flex; align-items:center; gap:0.75rem; }
.header-avatar-wrap {
    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:1.75rem;
    overflow:hidden; flex-shrink:0;
}
.header-avatar-img {
    width:40px; height:40px;
    border-radius:var(--radius-full);
    object-fit:cover;
    border:2px solid var(--border);
    flex-shrink:0;
}
.header-info { display:flex; flex-direction:column; }
.header-name { font-size:1rem; font-weight:600; color:var(--text); line-height:1.3; }
.header-status {
    font-size:0.75rem;
    color:var(--text-secondary);
    display:flex; align-items:center; gap:0.25rem;
}
.status-dot { width:8px; height:8px; border-radius:50%; background:var(--text-tertiary); }
.status-dot.online { background:var(--success); }

/* ======= CONNECTION STATUS ======= */
.connection-status {
    height:28px;
    display:flex; align-items:center; gap:0.5rem;
    padding:0 1rem;
    font-size:0.75rem;
    background: var(--bg-secondary);
    border-bottom:1px solid var(--border-light);
    color: var(--text-secondary);
    flex-shrink:0;
}
.connection-status.connected    { color:var(--success); }
.connection-status.reconnecting { color:var(--warning); }
.connection-status.disconnected { color:var(--error); }

/* ======= MESSAGES ======= */
.messages-container {
    flex:1; overflow:hidden; position:relative;
    background: var(--bg);
}
.messages-scroll {
    height:100%; overflow-y:auto;
    padding:1rem 1rem 1.5rem;
}
.load-more { text-align:center; margin-bottom:1rem; }
.messages-list {
    display:flex; flex-direction:column;
    gap:0.25rem; min-height:100%;
}
.empty-state {
    display:flex; flex-direction:column;
    align-items:center; justify-content:center;
    padding:4rem 1rem; text-align:center;
    color: var(--text-secondary);
    flex:1;
}
.empty-icon { font-size:3.5rem; color:var(--text-tertiary); margin-bottom:1.25rem; }
.empty-state h3 { font-size:1.125rem; color:var(--text); margin-bottom:0.25rem; }
.empty-state p  { color:var(--text-secondary); font-size:0.9rem; }

.scroll-bottom-btn {
    position:absolute; bottom:1rem; right:1rem;
    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);
}
.scroll-bottom-btn:hover { background:var(--bg-tertiary); transform:scale(1.05); }

/* ======= MESSAGE BUBBLES ======= */
.message-wrapper {
    display:flex; flex-direction:column;
    animation: msgIn 0.25s ease;
}
.message-wrapper.self  { align-items:flex-end; }
.message-wrapper.other { align-items:flex-start; }

@keyframes msgIn { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }

.message-bubble {
    max-width:72%;
    padding:0.625rem 0.875rem;
    border-radius:var(--radius-lg);
    word-wrap:break-word; overflow-wrap:break-word; white-space:pre-wrap;
    line-height:1.55;
}
.message-wrapper.self  .message-bubble {
    background: var(--bubble-self);
    color: var(--bubble-self-text);
    border-bottom-right-radius: var(--radius-xs);
}
.message-wrapper.other .message-bubble {
    background: var(--bubble-other);
    color: var(--bubble-other-text);
    border-bottom-left-radius: var(--radius-xs);
}
.message-bubble.deleted {
    opacity:0.55;
    font-style:italic;
    color: var(--text-secondary) !important;
    background: var(--bg-tertiary) !important;
}
.message-text { font-size:0.9375rem; }

.message-meta {
    display:flex; align-items:center; gap:0.35rem;
    margin-top:0.2rem; font-size:0.6875rem;
}
.message-wrapper.self  .message-meta {
    justify-content:flex-end;
    color: rgba(255,255,255,0.75);
}
.message-wrapper.other .message-meta { color:var(--text-tertiary); }
[data-theme="dark"] .message-wrapper.self .message-meta { color:rgba(255,255,255,0.65); }

.message-status { display:inline-flex; align-items:center; }
.message-status.read { color: #93C5FD; }
[data-theme="light"] .message-status.read { color: #A5D6A7; }

.edited-label { font-style:italic; opacity:0.7; }

.message-actions {
    display:flex; gap:2px;
    margin-top:0.2rem;
    opacity:0;
    transition:opacity var(--transition-fast);
}
.message-wrapper:hover .message-actions { opacity:1; }
.message-actions button {
    width:26px; height:26px;
    background:transparent; border:none;
    border-radius:var(--radius-sm);
    cursor:pointer; font-size:0.7rem;
    transition:all var(--transition-fast);
    display:flex; align-items:center; justify-content:center;
    color: var(--text-tertiary);
}
.message-wrapper.other .message-actions button:hover {
    background:var(--bg-tertiary); color:var(--text);
}
.message-wrapper.self .message-actions button { color:rgba(255,255,255,0.6); }
.message-wrapper.self  .message-actions button:hover { background:rgba(255,255,255,0.15); color:#fff; }

/* Reply indicator */
.reply-indicator {
    display:flex; align-items:center; gap:0.4rem;
    padding:0.2rem 0.5rem; margin-bottom:0.35rem;
    font-size:0.75rem;
    border-left:3px solid var(--primary);
    border-radius:0 var(--radius-sm) var(--radius-sm) 0;
    background: rgba(0,0,0,0.06);
    color: var(--text-secondary);
}
[data-theme="dark"] .reply-indicator { background:rgba(255,255,255,0.07); }
.message-wrapper.self .reply-indicator { color:rgba(255,255,255,0.8); background:rgba(255,255,255,0.12); }

/* Attachments */
.attachment { margin-top:0.4rem; border-radius:var(--radius-md); overflow:hidden; }
.attachment img { max-width:100%; max-height:280px; object-fit:cover; border-radius:var(--radius-md); cursor:pointer; display:block; }
.attachment video { max-width:100%; max-height:280px; border-radius:var(--radius-md); }
.attachment audio { width:100%; }
.attachment-file {
    display:flex; align-items:center; gap:0.5rem;
    padding:0.5rem 0.75rem;
    background:var(--bg-secondary);
    border:1px solid var(--border);
    border-radius:var(--radius-md);
    cursor:pointer;
    transition:all var(--transition-fast);
    color:var(--text);
}
.attachment-file:hover { background:var(--bg-tertiary); border-color:var(--primary); }
.attachment-file .fa-file-alt { font-size:1.4rem; color:var(--primary); }
.file-info { flex:1; min-width:0; }
.file-name { font-size:0.875rem; font-weight:500; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; color:var(--text); }
.file-size { font-size:0.75rem; color:var(--text-tertiary); }

/* ======= TYPING INDICATOR ======= */
.typing-indicator {
    display:flex; align-items:center; gap:0.5rem;
    padding:0 1rem;
    height:32px;
    background: var(--bg-secondary);
    border-top:1px solid var(--border-light);
    flex-shrink:0;
    color: var(--text-secondary);
}
.typing-dots { display:flex; gap:3px; }
.typing-dot {
    width:6px; height:6px;
    border-radius:50%;
    background: var(--text-tertiary);
    animation: typeBounce 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 typeBounce { 0%,80%,100%{transform:scale(0);}40%{transform:scale(1);} }
.typing-text { font-size:0.8125rem; color:var(--text-secondary); }

/* ======= REPLY PREVIEW ======= */
.reply-preview { flex-shrink:0; border-top:1px solid var(--border-light); }
.reply-bar {
    display:flex; align-items:center; gap:0.75rem;
    padding:0.5rem 1rem;
    background: var(--bg-secondary);
    color:var(--text);
}
.reply-icon { color:var(--primary); flex-shrink:0; }
.reply-content { flex:1; min-width:0; }
.reply-label { font-size:0.75rem; font-weight:600; color:var(--primary); display:block; }
.reply-text { font-size:0.8125rem; color:var(--text-secondary); display:block; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

/* ======= COMPOSE ======= */
.compose-area {
    flex-shrink:0;
    border-top:1px solid var(--border);
    background: var(--bg-elevated);
}
.upload-preview {
    display:flex; align-items:center; justify-content:space-between;
    padding:0.4rem 1rem;
    background: var(--bg-secondary);
    border-bottom:1px solid var(--border-light);
    color:var(--text);
}
.upload-info { display:flex; align-items:center; gap:0.5rem; font-size:0.8125rem; color:var(--text-secondary); }
.compose-form { display:flex; align-items:flex-end; gap:0.5rem; padding:0.5rem 0.75rem; }
.compose-tools { display:flex; gap:2px; padding-bottom:0.1rem; }
.input-area { flex:1; }
.message-input {
    width:100%; resize:none;
    padding:0.625rem 1rem;
    font-size:0.9375rem; font-family:inherit;
    color: var(--input-text);
    background: var(--input-bg);
    border:1.5px solid var(--input-border);
    border-radius:var(--radius-xl);
    outline:none;
    min-height:42px; max-height:120px;
    line-height:1.5;
    transition:all var(--transition-fast);
    overflow-y:auto;
}
.message-input:focus {
    border-color: var(--primary);
    box-shadow:0 0 0 3px var(--primary-light);
    background: var(--bg-elevated);
}
.message-input::placeholder { color:var(--input-placeholder); }
.upload-progress {
    display:flex; align-items:center; gap:0.75rem;
    padding:0.5rem 1rem;
    background:var(--bg-secondary);
    border-top:1px solid var(--border-light);
    color:var(--text);
}
.progress-track { flex:1; height:4px; background:var(--border); border-radius:var(--radius-full); overflow:hidden; }
.progress-fill { height:100%; background:var(--primary); border-radius:var(--radius-full); transition:width var(--transition); }
.progress-text { font-size:0.75rem; font-weight:500; color:var(--text-secondary); min-width:36px; }

/* ======= MODALS ======= */
.modal {
    position:fixed; inset:0; z-index:100;
    display:flex; align-items:center; justify-content:center;
    padding:1rem;
}
.modal.hidden { display:none !important; }
.modal-backdrop {
    position:absolute; inset:0;
    background:rgba(0,0,0,0.55);
    backdrop-filter:blur(4px);
}
.modal-container {
    position:relative; width:100%;
    max-width:520px; max-height:90vh;
    background: var(--bg-elevated);
    border-radius:var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow:hidden;
    display:flex; flex-direction:column;
    border:1px solid var(--border);
    color:var(--text);
}
.modal-sm { max-width:400px; }
.modal-header {
    display:flex; align-items:center; justify-content:space-between;
    padding:1rem 1.5rem;
    border-bottom:1px solid var(--border);
    background: var(--bg-elevated);
}
.modal-header h2 { font-size:1.0625rem; font-weight:600; color:var(--text); }
.modal-header h2 i { margin-right:0.5rem; color:var(--primary); }
.modal-body { padding:1.5rem; overflow-y:auto; flex:1; background:var(--bg-elevated); }
.modal-footer {
    display:flex; justify-content:flex-end; gap:0.5rem;
    padding:1rem 1.5rem;
    border-top:1px solid var(--border);
    background: var(--bg-secondary);
}

/* Settings sections */
.settings-section { margin-bottom:2rem; }
.settings-section:last-child { margin-bottom:0; }
.settings-section h3 {
    font-size:0.75rem; font-weight:600;
    text-transform:uppercase; letter-spacing:0.05em;
    color:var(--text-secondary);
    margin-bottom:1rem;
    padding-bottom:0.5rem;
    border-bottom:1px solid var(--border-light);
}
.avatar-section {
    display:flex; align-items:center; gap:1rem;
    margin-bottom:1rem;
}
.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; flex-shrink:0;
}
.settings-avatar-img {
    width:72px; height:72px;
    border-radius:var(--radius-full);
    object-fit:cover; flex-shrink:0;
}

/* Theme selector */
.theme-selector { display:grid; grid-template-columns:repeat(3,1fr); gap:0.75rem; }
.theme-option {
    display:flex; flex-direction:column; align-items:center; gap:0.5rem;
    padding:0.75rem; font-size:0.8rem; font-weight:500;
    color:var(--text);
    background:var(--bg-secondary);
    border:2px solid var(--border);
    border-radius:var(--radius-md);
    cursor:pointer;
    transition:all var(--transition-fast);
}
.theme-option:hover { border-color:var(--text-tertiary); }
.theme-option.active { border-color:var(--primary); background:var(--primary-light); color:var(--primary); }
.theme-preview {
    width:56px; height:38px;
    border-radius:var(--radius-sm);
    overflow:hidden; border:1px solid var(--border);
}
.theme-preview-header { height:8px; }
.theme-preview-body { padding:3px; display:flex; flex-direction:column; gap:2px; }
.theme-preview-message { height:6px; border-radius:3px; }
.theme-preview-message.self { width:65%; align-self:flex-end; }
.theme-preview-message.other { width:55%; }

/* Light preview colours */
.theme-preview-light { background:#FFFFFF; }
.theme-preview-light .theme-preview-header { background:#F9FAFB; }
.theme-preview-light .theme-preview-message.self  { background:#2563EB; }
.theme-preview-light .theme-preview-message.other { background:#F3F4F6; }
/* Dark preview colours */
.theme-preview-dark { background:#0F172A; }
.theme-preview-dark .theme-preview-header { background:#1E293B; }
.theme-preview-dark .theme-preview-message.self  { background:#3B82F6; }
.theme-preview-dark .theme-preview-message.other { background:#334155; }
/* Custom preview */
.theme-preview-custom { background: linear-gradient(135deg,#6366F1,#EC4899); }
.theme-preview-custom .theme-preview-header { background:rgba(0,0,0,0.2); }
.theme-preview-custom .theme-preview-message.self  { background:#F9FAFB; }
.theme-preview-custom .theme-preview-message.other { background:rgba(255,255,255,0.4); }

.custom-theme-section {
    margin-top:0.75rem; padding:1rem;
    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:1rem; }
.color-picker-group label {
    display:block; font-size:0.75rem; font-weight:500;
    margin-bottom:0.4rem; color:var(--text);
}
.color-input-wrapper { display:flex; align-items:center; gap:0.4rem; }
.color-input-wrapper input[type="color"] {
    width:36px; height:36px;
    border:1px solid var(--border); border-radius:var(--radius-sm);
    padding:2px; cursor:pointer; background:none;
}
.color-hex { font-size:0.75rem; font-family:var(--font-mono); color:var(--text-secondary); }

/* About rows */
.about-info { display:flex; flex-direction:column; gap:0; }
.about-row {
    display:flex; justify-content:space-between; align-items:center;
    padding:0.625rem 0;
    border-bottom:1px solid var(--border-light);
    font-size:0.875rem; color:var(--text);
}
.about-row:last-child { border-bottom:none; }

/* Online users modal */
.online-users-list { max-height:300px; overflow-y:auto; background:var(--bg-elevated); }
.loading-state { display:flex; align-items:center; justify-content:center; gap:0.5rem; padding:2rem; color:var(--text-secondary); }
.user-item { display:flex; align-items:center; gap:0.75rem; padding:0.6rem 1.25rem; transition:background var(--transition-fast); color:var(--text); }
.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:1.2rem; overflow:hidden; flex-shrink:0; }
.user-avatar img { width:100%; height:100%; object-fit:cover; }
.user-info { flex:1; }
.user-name { font-size:0.875rem; font-weight:500; color:var(--text); }
.user-status-text { font-size:0.75rem; color:var(--text-secondary); }

/* ======= EMOJI PICKER ======= */
.emoji-picker {
    position:fixed; bottom:80px; left:60px;
    z-index:200;
    background:var(--bg-elevated);
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-xl);
    width:300px; max-height:320px;
    overflow:hidden;
    display:flex; flex-direction:column;
}
.emoji-header { border-bottom:1px solid var(--border); padding:0.4rem; background:var(--bg-secondary); }
.emoji-categories { display:flex; gap:2px; }
.emoji-cat {
    width:34px; height:34px; border:none;
    background:transparent; border-radius:var(--radius-sm);
    cursor:pointer; color:var(--text-secondary);
    font-size:0.8rem; transition:all var(--transition-fast);
}
.emoji-cat:hover { background:var(--bg-tertiary); color:var(--text); }
.emoji-cat.active { background:var(--primary-light); color:var(--primary); }
.emoji-grid {
    padding:0.4rem;
    display:grid; grid-template-columns:repeat(8,1fr);
    gap:1px; overflow-y:auto; flex:1;
    background:var(--bg-elevated);
}
.emoji-item {
    width:34px; height:34px;
    display:flex; align-items:center; justify-content:center;
    font-size:1.2rem; cursor:pointer;
    border-radius:var(--radius-sm);
    border:none; background:transparent;
    transition:background var(--transition-fast);
}
.emoji-item:hover { background:var(--bg-tertiary); }

/* ======= TOASTS ======= */
.toast-container { position:fixed; top:1rem; right:1rem; z-index:300; display:flex; flex-direction:column; gap:0.5rem; max-width:340px; pointer-events:none; }
.toast {
    padding:0.75rem 1rem;
    background:var(--bg-elevated);
    border:1px solid var(--border);
    border-radius:var(--radius-md);
    box-shadow:var(--shadow-lg);
    display:flex; align-items:center; gap:0.75rem;
    font-size:0.875rem; color:var(--text);
    animation:toastIn 0.3s ease;
    pointer-events:auto;
}
.toast-success { border-left:4px solid var(--success); }
.toast-error   { border-left:4px solid var(--error); }
.toast-warning { border-left:4px solid var(--warning); }
.toast-info    { border-left:4px solid var(--info); }
.toast-success i { color:var(--success); }
.toast-error   i { color:var(--error); }
.toast-warning i { color:var(--warning); }
.toast-info    i { color:var(--info); }
@keyframes toastIn { from{transform:translateX(100%);opacity:0;} to{transform:translateX(0);opacity:1;} }

/* ======= RESPONSIVE ======= */
@media (max-width:640px) {
    .auth-container { padding:1.5rem 1.25rem; border-radius:var(--radius-xl); }
    .message-bubble { max-width:88%; }
    .compose-form { padding:0.4rem 0.5rem; }
    .modal { padding:0; align-items:flex-end; }
    .modal-container { max-height:88vh; border-radius:var(--radius-xl) var(--radius-xl) 0 0; max-width:100%; }
    .color-picker-row { grid-template-columns:1fr; }
    .theme-selector { grid-template-columns:repeat(3,1fr); }
    .emoji-picker { left:8px; right:8px; bottom:72px; width:auto; }
}
@media (min-width:768px) {
    .message-bubble { max-width:65%; }
    .compose-form { padding:0.6rem 1rem; }
}
@media (min-width:1024px) { .message-bubble { max-width:55%; } }

/* ======= MESSAGE SENDER ROW FIXED ======= */
.msg-sender-row {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-bottom: 0.25rem;
}
.msg-sender-row-self {
    justify-content: flex-end;
}
.msg-avatar {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--border);
    display: block;
}
.msg-avatar-placeholder {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    flex-shrink: 0;
}
.msg-sender-name {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    line-height: 1;
}
.message-wrapper.self .msg-sender-name {
    color: var(--text-tertiary);
}

/* ======= MESSAGE ACTIONS ALWAYS VISIBLE ======= */
.message-actions {
    display: flex;
    gap: 2px;
    margin-top: 0.25rem;
    opacity: 1 !important;
}

/* ======= ATTACHMENT SIZE FIX ======= */
.message-bubble .attachment {
    max-width: 260px;
}
.message-bubble .attachment img {
    max-width: 100%;
    max-height: 220px;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: block;
}
.message-bubble .attachment video {
    max-width: 100%;
    max-height: 220px;
    border-radius: var(--radius-md);
    display: block;
}
.message-bubble {
    display: inline-block;
    max-width: 100%;
}
.message-wrapper.self .message-bubble {
    max-width: 72%;
}
.message-wrapper.other .message-bubble {
    max-width: 72%;
}

/* ======= LATEST MESSAGE TOAST ======= */
.latest-message-bar {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    padding: 0.4rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    max-width: 280px;
    transition: all var(--transition-fast);
    font-size: 0.8125rem;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.latest-message-bar:hover {
    background: var(--bg-tertiary);
    transform: translateX(-50%) translateY(-2px);
    box-shadow: var(--shadow-xl);
}
.latest-message-bar .lmb-avatar {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
    font-weight: 700;
    flex-shrink: 0;
    overflow: hidden;
}
.latest-message-bar .lmb-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}
.latest-message-bar .lmb-name {
    font-weight: 600;
    color: var(--primary);
    flex-shrink: 0;
}
.latest-message-bar .lmb-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-secondary);
}
.latest-message-bar.hidden {
    display: none !important;
}

/* ======= SETTINGS TOGGLE ======= */
.settings-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-light);
}
.settings-toggle-row:last-child {
    border-bottom: none;
}
.settings-toggle-row label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    margin: 0;
}
.settings-toggle-row .toggle-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 0.1rem;
}
.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}
.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}
.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
    cursor: pointer;
}
.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    left: 2px;
    top: 2px;
    background: var(--text-tertiary);
    border-radius: 50%;
    transition: all var(--transition-fast);
}
.toggle-switch input:checked + .toggle-slider {
    background: var(--primary);
    border-color: var(--primary);
}
.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(20px);
    background: #fff;
}

@media (min-width: 768px) {
    .message-wrapper.self .message-bubble,
    .message-wrapper.other .message-bubble {
        max-width: 65%;
    }
}
@media (min-width: 1024px) {
    .message-wrapper.self .message-bubble,
    .message-wrapper.other .message-bubble {
        max-width: 55%;
    }
}