/* AI Document Vault - Premium SaaS Stylesheet */

/* CSS Variables */
:root {
    /* Copper & Slate Palette */
    --copper-50: #FDF6F0;
    --copper-100: #F9E8D8;
    --copper-200: #F2D0B0;
    --copper-300: #E8B388;
    --copper-400: #D4896A;
    --copper-500: #B87333;
    --copper-600: #9A5F2A;
    --copper-700: #7C4B22;
    --copper-800: #5E371A;
    --copper-900: #3D2B1F;
    
    --slate-50: #F8FAFC;
    --slate-100: #F1F5F9;
    --slate-200: #E2E8F0;
    --slate-300: #CBD5E1;
    --slate-400: #94A3B8;
    --slate-500: #64748B;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1E293B;
    --slate-900: #0F172A;
    --slate-950: #020617;
    
    /* Gradients */
    --gradient-copper: linear-gradient(135deg, var(--copper-500), var(--copper-600));
    --gradient-hero: linear-gradient(135deg, rgba(184, 115, 51, 0.1), rgba(30, 41, 59, 0.05));
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    --shadow-copper: 0 10px 40px -10px rgba(184, 115, 51, 0.3);
    --shadow-copper-lg: 0 20px 60px -15px rgba(184, 115, 51, 0.4);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
}

/* Dark Mode Variables */
.dark {
    --bg-primary: var(--slate-950);
    --bg-secondary: var(--slate-900);
    --bg-tertiary: var(--slate-800);
    --text-primary: #ffffff;
    --text-secondary: var(--slate-300);
    --text-tertiary: var(--slate-400);
    --border-color: var(--slate-700);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--slate-50);
    color: var(--slate-900);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* Glassmorphism */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dark .glass {
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, var(--copper-600), var(--copper-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-copper);
    color: white;
    box-shadow: var(--shadow-copper);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-copper-lg);
}

.btn-secondary {
    background: white;
    color: var(--slate-700);
    border: 2px solid var(--slate-200);
}

.dark .btn-secondary {
    background: var(--slate-800);
    color: var(--slate-300);
    border-color: var(--slate-700);
}

.btn-secondary:hover {
    border-color: var(--copper-500);
    color: var(--copper-600);
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--slate-200);
    transition: all var(--transition-base);
}

.dark .card {
    background: var(--slate-800);
    border-color: var(--slate-700);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--copper-300);
}

.dark .card:hover {
    border-color: var(--copper-700);
}

/* Animations */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

@keyframes scan-line {
    0% {
        transform: translateY(-100%);
    }
    100% {
        transform: translateY(100%);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slide-in-right {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

.animate-pulse-glow {
    animation: pulse-glow 4s ease-in-out infinite;
}

.animate-scan {
    animation: scan-line 3s linear infinite;
}

.animate-shimmer {
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

.animate-fade-in-up {
    animation: fade-in-up 0.6s ease-out forwards;
}

.animate-slide-in-right {
    animation: slide-in-right 0.6s ease-out forwards;
}

/* Staggered Animation Delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--slate-100);
}

.dark ::-webkit-scrollbar-track {
    background: var(--slate-800);
}

::-webkit-scrollbar-thumb {
    background: var(--slate-400);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--copper-500);
}

/* Selection */
::selection {
    background: var(--copper-200);
    color: var(--copper-900);
}

.dark ::selection {
    background: var(--copper-700);
    color: white;
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--copper-500);
    outline-offset: 2px;
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 1.5s infinite;
}

/* Tooltip */
.tooltip {
    position: relative;
}

.tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: 0.5rem 1rem;
    background: var(--slate-800);
    color: white;
    font-size: 0.75rem;
    border-radius: var(--radius-md);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.dark .tooltip::before {
    background: var(--slate-700);
}

.tooltip:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
}

.badge-copper {
    background: var(--copper-100);
    color: var(--copper-700);
}

.dark .badge-copper {
    background: rgba(184, 115, 51, 0.2);
    color: var(--copper-300);
}

/* Progress Bar */
.progress-bar {
    height: 8px;
    background: var(--slate-200);
    border-radius: 9999px;
    overflow: hidden;
}

.dark .progress-bar {
    background: var(--slate-700);
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-copper);
    border-radius: 9999px;
    transition: width 0.5s ease;
}

/* Toggle Switch */
.toggle {
    position: relative;
    width: 48px;
    height: 24px;
    background: var(--slate-300);
    border-radius: 9999px;
    cursor: pointer;
    transition: background var(--transition-base);
}

.dark .toggle {
    background: var(--slate-700);
}

.toggle.active {
    background: var(--copper-500);
}

.toggle::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.toggle.active::after {
    transform: translateX(24px);
}

/* Accordion */
.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.accordion-item.active .accordion-content {
    max-height: 500px;
}

.accordion-icon {
    transition: transform var(--transition-base);
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 100;
}

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

.modal {
    background: white;
    border-radius: var(--radius-2xl);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.dark .modal {
    background: var(--slate-800);
}

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

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transform: translateX(120%);
    transition: transform var(--transition-base);
    z-index: 100;
}

.dark .toast {
    background: var(--slate-800);
    border: 1px solid var(--slate-700);
}

.toast.active {
    transform: translateX(0);
}

.toast-success {
    border-left: 4px solid #22c55e;
}

.toast-error {
    border-left: 4px solid #ef4444;
}

/* Responsive Utilities */
@media (max-width: 640px) {
    .hide-mobile {
        display: none !important;
    }
}

@media (min-width: 641px) and (max-width: 1024px) {
    .hide-tablet {
        display: none !important;
    }
}

@media (min-width: 1025px) {
    .hide-desktop {
        display: none !important;
    }
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Hero Section Specific */
.hero-gradient {
    background: radial-gradient(ellipse at top, rgba(184, 115, 51, 0.15), transparent 50%),
                radial-gradient(ellipse at bottom right, rgba(30, 41, 59, 0.1), transparent 50%);
}

/* Feature Cards Grid Pattern */
.features-grid::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 1px 1px, var(--slate-300) 1px, transparent 0);
    background-size: 40px 40px;
    opacity: 0.3;
    pointer-events: none;
}

.dark .features-grid::before {
    background-image: radial-gradient(circle at 1px 1px, var(--slate-700) 1px, transparent 0);
    opacity: 0.2;
}

/* Pricing Card Highlight */
.pricing-highlight {
    position: relative;
}

.pricing-highlight::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, var(--copper-400), var(--copper-600));
    border-radius: calc(var(--radius-2xl) + 2px);
    z-index: -1;
}

/* Testimonial Quote */
.testimonial-quote {
    position: relative;
}

.testimonial-quote::before {
    content: '"';
    position: absolute;
    top: -1rem;
    left: -1rem;
    font-size: 6rem;
    color: var(--copper-200);
    font-family: Georgia, serif;
    line-height: 1;
    opacity: 0.5;
}

.dark .testimonial-quote::before {
    color: var(--copper-800);
}

/* Security Badge */
.security-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: var(--radius-lg);
    color: #16a34a;
    font-size: 0.875rem;
    font-weight: 500;
}

.dark .security-badge {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
}

/* Language Selector */
.lang-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.lang-option:hover {
    background: var(--slate-100);
}

.dark .lang-option:hover {
    background: var(--slate-800);
}

.lang-option.active {
    background: var(--copper-100);
    color: var(--copper-700);
}

.dark .lang-option.active {
    background: rgba(184, 115, 51, 0.2);
    color: var(--copper-300);
}

/* Document Upload Zone */
.upload-zone {
    border: 2px dashed var(--slate-300);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-base);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--copper-500);
    background: var(--copper-50);
}

.dark .upload-zone {
    border-color: var(--slate-700);
}

.dark .upload-zone:hover,
.dark .upload-zone.dragover {
    background: rgba(184, 115, 51, 0.1);
}

/* AI Chat Interface */
.chat-message {
    max-width: 80%;
    padding: 1rem;
    border-radius: var(--radius-xl);
    margin-bottom: 1rem;
}

.chat-message.user {
    background: var(--copper-500);
    color: white;
    margin-left: auto;
    border-bottom-right-radius: var(--radius-sm);
}

.chat-message.ai {
    background: var(--slate-100);
    color: var(--slate-800);
    border-bottom-left-radius: var(--radius-sm);
}

.dark .chat-message.ai {
    background: var(--slate-800);
    color: var(--slate-200);
}

/* Chart Styles */
.chart-bar {
    transition: height 0.5s ease;
}

.chart-bar:hover {
    opacity: 0.8;
}

/* Navigation Active State */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--copper-500);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Footer Link Hover */
.footer-link {
    position: relative;
    display: inline-block;
}

.footer-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width var(--transition-base);
}

.footer-link:hover::after {
    width: 100%;
}

/* Social Icon Hover */
.social-icon {
    transition: all var(--transition-base);
}

.social-icon:hover {
    transform: translateY(-3px);
    color: var(--copper-500);
}

/* Input Focus States */
input:focus,
textarea:focus,
select:focus {
    border-color: var(--copper-500);
    box-shadow: 0 0 0 3px rgba(184, 115, 51, 0.1);
}

/* Checkbox & Radio Custom Styles */
.custom-checkbox {
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--slate-300);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dark .custom-checkbox {
    border-color: var(--slate-600);
}

.custom-checkbox:checked {
    background: var(--copper-500);
    border-color: var(--copper-500);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='white'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3E%3C/svg%3E");
}

/* Table Styles */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.data-table th {
    background: var(--slate-100);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--slate-700);
    border-bottom: 2px solid var(--slate-200);
}

.dark .data-table th {
    background: var(--slate-800);
    color: var(--slate-300);
    border-bottom-color: var(--slate-700);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--slate-200);
}

.dark .data-table td {
    border-bottom-color: var(--slate-700);
}

.data-table tr:hover td {
    background: var(--slate-50);
}

.dark .data-table tr:hover td {
    background: var(--slate-800);
}

/* Status Indicators */
.status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.status-success {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
}

.status-success .status-dot {
    background: #22c55e;
}

.status-pending {
    background: rgba(234, 179, 8, 0.1);
    color: #ca8a04;
}

.status-pending .status-dot {
    background: #eab308;
    animation: pulse 2s infinite;
}

.status-error {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

.status-error .status-dot {
    background: #ef4444;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--slate-200) 25%, var(--slate-300) 50%, var(--slate-200) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

.dark .skeleton {
    background: linear-gradient(90deg, var(--slate-800) 25%, var(--slate-700) 50%, var(--slate-800) 75%);
    background-size: 200% 100%;
}

/* Responsive Typography */
@media (max-width: 640px) {
    html {
        font-size: 14px;
    }
}

@media (min-width: 1536px) {
    html {
        font-size: 18px;
    }
}