/* ================================================================
   Document Translation Platform — Dashboard Styles
   Premium dark theme with glassmorphism and micro-animations
   ================================================================ */

/* ---------- CSS Variables ---------- */
:root {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.7);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.45);
    --bg-glass-border: rgba(99, 102, 241, 0.08);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-accent: #4f46e5;

    --accent: #4f46e5;
    --accent-light: #6366f1;
    --accent-glow: rgba(79, 70, 229, 0.15);
    --accent-gradient: linear-gradient(135deg, #4f46e5, #7c3aed);

    --success: #059669;
    --success-glow: rgba(5, 150, 105, 0.15);
    --error: #dc2626;
    --error-glow: rgba(220, 38, 38, 0.15);
    --warning: #d97706;

    --border: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

/* ---------- Animated Background ---------- */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(0,0,0,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,0,0,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    pointer-events: none;
}

.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    z-index: 0;
    pointer-events: none;
    animation: float 20s ease-in-out infinite;
}
.bg-glow-1 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(99,102,241,0.15), transparent 70%);
    top: -100px; left: -100px;
    animation-delay: 0s;
}
.bg-glow-2 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(139,92,246,0.12), transparent 70%);
    bottom: -50px; right: -50px;
    animation-delay: -7s;
}
.bg-glow-3 {
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(16,185,129,0.08), transparent 70%);
    top: 40%; left: 50%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ---------- Header ---------- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.logo-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    color: white;
    box-shadow: var(--shadow-glow);
}
.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #0f172a, #334155);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.logo-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.header-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    background: var(--bg-glass);
    border: 1px solid var(--bg-glass-border);
}
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}
.status-dot--healthy {
    background: var(--success);
    box-shadow: 0 0 8px var(--success-glow);
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.85); }
}

/* ---------- Main ---------- */
.main {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

/* ---------- Upload Section ---------- */
.upload-section {
    animation: fadeInUp 0.6s ease-out;
}
.section-header {
    margin-bottom: 1.5rem;
}
.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}
.section-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-xl);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-glass);
    position: relative;
    overflow: hidden;
}
.upload-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition);
    border-radius: var(--radius-xl);
}
.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}
.upload-zone:hover::before,
.upload-zone.drag-over::before {
    opacity: 0.03;
}
.upload-zone-content {
    position: relative;
    z-index: 1;
}
.upload-icon {
    color: var(--text-muted);
    margin-bottom: 1rem;
    transition: var(--transition);
}
.upload-zone:hover .upload-icon {
    color: var(--accent-light);
    transform: translateY(-4px);
}
.upload-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}
.upload-link {
    color: var(--accent-light);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.upload-hint {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* File Info (replaces upload content) */
.upload-file-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    z-index: 1;
    padding: 0.5rem;
}
.file-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    color: white;
    flex-shrink: 0;
}
.file-details {
    text-align: left;
    flex: 1;
    min-width: 0;
}
.file-name {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.file-size {
    font-size: 0.8rem;
    color: var(--text-muted);
}
.file-remove {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-sm);
    color: var(--error);
    padding: 0.4rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
}
.file-remove:hover {
    background: rgba(239, 68, 68, 0.2);
    transform: scale(1.1);
}

/* ---------- Options Grid ---------- */
.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
    margin: 1.5rem 0;
}
@media (max-width: 768px) {
    .options-grid { grid-template-columns: 1fr; }
}

.option-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}
.option-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}
.option-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.75rem;
}
.option-label svg {
    color: var(--accent-light);
}

/* Select Input */
.select-input {
    width: 100%;
    padding: 0.65rem 0.9rem;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.7rem center;
    padding-right: 2.2rem;
}
.select-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.select-input option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Toggle Group */
.toggle-group {
    display: flex;
    gap: 0.5rem;
}
.toggle-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.6rem 0.8rem;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.toggle-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}
.toggle-btn.active {
    background: var(--accent-gradient);
    border-color: var(--accent);
    color: white;
    box-shadow: 0 2px 12px var(--accent-glow);
}

/* ---------- Translate Button ---------- */
.translate-btn {
    width: 100%;
    padding: 1rem;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 20px var(--accent-glow);
    position: relative;
    overflow: hidden;
}
.translate-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}
.translate-btn:hover:not(:disabled)::before {
    opacity: 1;
}
.translate-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px var(--accent-glow);
}
.translate-btn:active:not(:disabled) {
    transform: translateY(0);
}
.translate-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    box-shadow: none;
}
.btn-text, .btn-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2.5px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ---------- Progress Section ---------- */
.progress-section {
    animation: fadeInUp 0.4s ease-out;
}
.progress-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    backdrop-filter: blur(10px);
}
.progress-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.progress-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    color: white;
    position: relative;
}
.pulse-ring {
    position: absolute;
    inset: -4px;
    border: 2px solid var(--accent);
    border-radius: var(--radius-md);
    animation: pulse-ring 2s ease-out infinite;
}
@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 0.6; }
    100% { transform: scale(1.15); opacity: 0; }
}
.progress-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}
.progress-header p {
    color: var(--text-muted);
    font-size: 0.85rem;
}
.progress-bar-container {
    height: 6px;
    background: rgba(0, 0, 0, 0.04);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 1.5rem;
}
.progress-bar {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 999px;
    width: 0%;
    transition: width 0.5s ease-out;
    box-shadow: 0 0 12px var(--accent-glow);
}

/* Progress Steps */
.progress-steps {
    display: flex;
    justify-content: space-between;
}
.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    transition: var(--transition);
}
.step.active {
    color: var(--accent-light);
}
.step.done {
    color: var(--success);
}
.step-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    transition: var(--transition);
}
.step.active .step-dot {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}
.step.done .step-dot {
    background: var(--success);
    box-shadow: 0 0 8px var(--success-glow);
}

/* ---------- Results Section ---------- */
.results-section {
    animation: fadeInUp 0.5s ease-out;
}
.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}
.results-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.success-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #10b981, #059669);
    border-radius: var(--radius-md);
    color: white;
    box-shadow: 0 4px 16px var(--success-glow);
}
.results-title h2 {
    font-size: 1.3rem;
    font-weight: 700;
}
.results-title p {
    color: var(--text-muted);
    font-size: 0.85rem;
}
.results-actions {
    display: flex;
    gap: 0.75rem;
}
.action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.2rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}
.action-btn--download {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 2px 12px var(--accent-glow);
}
.action-btn--download:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--accent-glow);
}
.action-btn--new {
    background: var(--bg-glass);
    color: var(--text-secondary);
    border-color: var(--border);
}
.action-btn--new:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    background: var(--bg-card-hover);
}
.action-btn--edit {
    background: var(--bg-glass);
    color: var(--text-accent);
    border-color: rgba(99, 102, 241, 0.3);
}
.action-btn--edit:hover {
    border-color: var(--accent);
    color: white;
    background: var(--accent-gradient);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

/* ---------- Preview Container ---------- */
.preview-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 0;
    align-items: stretch;
}
@media (max-width: 900px) {
    .preview-container {
        grid-template-columns: 1fr;
    }
    .preview-divider { display: none; }
}
.preview-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.preview-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}
.preview-badge {
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.preview-badge--original {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-light);
}
.preview-badge--translated {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}
.preview-content {
    flex: 1;
    min-height: 400px;
    max-height: 600px;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
.preview-content img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
}
.preview-content iframe,
.preview-content embed {
    width: 100%;
    height: 100%;
    min-height: 400px;
    border: none;
    border-radius: var(--radius-sm);
}
.preview-placeholder {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
}
.preview-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 0.5rem;
    color: var(--text-muted);
}

/* ---------- Error Toast ---------- */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(254, 242, 242, 0.95);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    max-width: 500px;
    width: calc(100% - 2rem);
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(239, 68, 68, 0.15);
    z-index: 1000;
    animation: slideUp 0.4s ease-out forwards;
}
@keyframes slideUp {
    from { transform: translateX(-50%) translateY(20px); opacity: 0; }
    to { transform: translateX(-50%) translateY(0); opacity: 1; }
}
.toast-icon {
    color: var(--error);
    flex-shrink: 0;
    margin-top: 2px;
}
.toast-content {
    flex: 1;
}
.toast-content strong {
    font-size: 0.9rem;
    color: var(--error);
}
.toast-content p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}
.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.2rem;
    flex-shrink: 0;
    transition: var(--transition);
}
.toast-close:hover {
    color: var(--text-primary);
}

/* ---------- Footer ---------- */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.78rem;
    border-top: 1px solid var(--border);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}