frontend/css/style.css

/* ═══════════════════════════════════════════════════════════════════
   AutoForge — Design System
   Dark developer-tool aesthetic with glassmorphism
   ═══════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── CSS Custom Properties ───────────────────────────────────────── */

:root {
    /* Background */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a28;
    --bg-surface: rgba(255, 255, 255, 0.03);
    --bg-surface-hover: rgba(255, 255, 255, 0.06);
    --bg-glass: rgba(18, 18, 26, 0.75);

    /* Accent gradient */
    --accent-blue: #00d4ff;
    --accent-purple: #7b2ff7;
    --accent-pink: #f72fff;
    --gradient-primary: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --gradient-secondary: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
    --gradient-glow: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(123, 47, 247, 0.15));

    /* Text */
    --text-primary: #e8e8f0;
    --text-secondary: #9898b0;
    --text-muted: #5e5e78;
    --text-accent: var(--accent-blue);

    /* Status */
    --status-success: #00e88f;
    --status-warning: #ffb800;
    --status-error: #ff4060;
    --status-pending: #5e5e78;

    /* Borders */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-medium: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(0, 212, 255, 0.3);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.1);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    --sidebar-width: 260px;
    --header-height: 64px;
}

/* ── Reset ───────────────────────────────────────────────────────── */

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: var(--text-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-purple);
}

/* ── Scrollbar ───────────────────────────────────────────────────── */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* ── Glass Panel ─────────────────────────────────────────────────── */

.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.glass-strong {
    background: rgba(18, 18, 26, 0.9);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
}

/* ── Layout ──────────────────────────────────────────────────────── */

.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-base);
}

.sidebar-header {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-subtle);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.sidebar-brand .logo {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
}

.sidebar-brand h1 {
    font-size: 1.2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 1px solid transparent;
    text-decoration: none;
}

.nav-item:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
    border-color: var(--border-subtle);
}

.nav-item.active {
    background: var(--gradient-glow);
    color: var(--text-accent);
    border-color: var(--border-accent);
}

.nav-item .icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.sidebar-footer {
    padding: var(--space-md) var(--space-xl);
    border-top: 1px solid var(--border-subtle);
}

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: var(--space-2xl);
    min-height: 100vh;
}

/* ── Page Header ─────────────────────────────────────────────────── */

.page-header {
    margin-bottom: var(--space-2xl);
}

.page-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.page-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ── Cards ───────────────────────────────────────────────────────── */

.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--border-medium);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--space-lg);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
}

/* ── Status Badges ───────────────────────────────────────────────── */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-sm);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-pending {
    background: rgba(94, 94, 120, 0.2);
    color: var(--status-pending);
    border: 1px solid rgba(94, 94, 120, 0.3);
}

.badge-running {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-blue);
    border: 1px solid rgba(0, 212, 255, 0.3);
    animation: pulse-glow 2s infinite;
}

.badge-completed {
    background: rgba(0, 232, 143, 0.1);
    color: var(--status-success);
    border: 1px solid rgba(0, 232, 143, 0.3);
}

.badge-failed {
    background: rgba(255, 64, 96, 0.1);
    color: var(--status-error);
    border: 1px solid rgba(255, 64, 96, 0.3);
}

/* ── Buttons ─────────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition-fast);
    outline: none;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.35);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-accent);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: none;
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: var(--bg-surface);
}

.btn-danger {
    background: rgba(255, 64, 96, 0.15);
    color: var(--status-error);
    border: 1px solid rgba(255, 64, 96, 0.3);
}

.btn-danger:hover {
    background: rgba(255, 64, 96, 0.25);
}

.btn-lg {
    padding: 0.85rem 2rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.4rem 0.9rem;
    font-size: 0.8rem;
}

/* ── Forms ────────────────────────────────────────────────────────── */

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-input::placeholder {
    color: var(--text-muted);
}

textarea.form-input {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ── Auth Layout ─────────────────────────────────────────────────── */

.auth-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-xl);
    position: relative;
}

.auth-layout::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 30% 20%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(123, 47, 247, 0.08) 0%, transparent 50%);
    animation: bg-drift 20s ease-in-out infinite alternate;
    pointer-events: none;
}

.auth-card {
    width: 100%;
    max-width: 440px;
    padding: var(--space-2xl);
    position: relative;
    z-index: 1;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.auth-header .logo-large {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
    margin: 0 auto var(--space-lg);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.25);
}

.auth-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-toggle {
    text-align: center;
    margin-top: var(--space-xl);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-toggle a {
    font-weight: 600;
}

.form-error {
    color: var(--status-error);
    font-size: 0.85rem;
    margin-top: var(--space-sm);
    display: none;
}

.form-error.visible {
    display: block;
}

/* ── Workflow Card ───────────────────────────────────────────────── */

.workflow-card {
    cursor: pointer;
}

.workflow-card .prompt-preview {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.workflow-card .meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ── Create Workflow Card ────────────────────────────────────────── */

.create-card {
    border: 2px dashed var(--border-medium);
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    cursor: pointer;
    transition: all var(--transition-base);
}

.create-card:hover {
    border-color: var(--accent-blue);
    background: var(--gradient-glow);
}

.create-card .icon-large {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #fff;
    margin-bottom: var(--space-md);
}

.create-card p {
    color: var(--text-secondary);
    font-weight: 500;
}

/* ── Modal ────────────────────────────────────────────────────────── */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 100%;
    max-width: 560px;
    padding: var(--space-2xl);
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
}

/* ── Stats Bar ───────────────────────────────────────────────────── */

.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.stat-card {
    padding: var(--space-lg);
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card .stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: var(--space-xs);
}

/* ── Empty State ─────────────────────────────────────────────────── */

.empty-state {
    text-align: center;
    padding: var(--space-2xl) * 2;
    color: var(--text-muted);
}

.empty-state .icon-empty {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

/* ── Loading Spinner ─────────────────────────────────────────────── */

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

/* ── Notifications ───────────────────────────────────────────────── */

.toast {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 2000;
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-base);
}

.toast.visible {
    transform: translateY(0);
    opacity: 1;
}

.toast-success {
    background: rgba(0, 232, 143, 0.15);
    border: 1px solid rgba(0, 232, 143, 0.3);
    color: var(--status-success);
}

.toast-error {
    background: rgba(255, 64, 96, 0.15);
    border: 1px solid rgba(255, 64, 96, 0.3);
    color: var(--status-error);
}

/* ── Placeholder Pages ───────────────────────────────────────────── */

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    text-align: center;
}

.placeholder-content .icon-placeholder {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    opacity: 0.3;
}

.placeholder-content h3 {
    font-size: 1.3rem;
    margin-bottom: var(--space-sm);
}

.placeholder-content p {
    color: var(--text-muted);
    max-width: 400px;
}

/* ── User Menu ───────────────────────────────────────────────────── */

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.user-menu:hover {
    background: var(--bg-surface-hover);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    color: #fff;
}

.user-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ── Animations ──────────────────────────────────────────────────── */

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse-glow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes bg-drift {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-2%, -2%) rotate(1deg); }
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fade-in 0.4s ease-out forwards;
}

/* ── Responsive ──────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: var(--space-lg);
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }
}