/*
 * SendFilesEncrypted - Modern Rustic Grayscale Theme
 * A premium, trustworthy design for secure file sharing
 */

/* ============================================
   CSS VARIABLES - Design Tokens
   ============================================ */
:root {
    /* Core Colors - Grayscale */
    --color-black: #0d0d0d;
    --color-charcoal: #1a1a1a;
    --color-dark: #2d2d2d;
    --color-gray-900: #3a3a3a;
    --color-gray-800: #4a4a4a;
    --color-gray-700: #5a5a5a;
    --color-gray-600: #6b6b6b;
    --color-gray-500: #8a8a8a;
    --color-gray-400: #a3a3a3;
    --color-gray-300: #c4c4c4;
    --color-gray-200: #e0e0e0;
    --color-gray-100: #f0f0f0;
    --color-off-white: #f8f8f6;
    --color-cream: #fafaf8;
    --color-white: #ffffff;

    /* Accent Colors */
    --color-accent: #b8860b;
    --color-accent-light: #d4a84b;
    --color-accent-dark: #8b6914;
    --color-success: #4a7c59;
    --color-danger: #8b3a3a;
    --color-info: #4a6b8b;

    /* Typography */
    --font-serif: 'Georgia', 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Borders & Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-cream);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Subtle texture overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    z-index: 9999;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-charcoal);
    margin: 0 0 var(--space-md) 0;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin: 0 0 var(--space-md) 0;
}

a {
    color: var(--color-gray-700);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-gray-500); }
.text-light { color: var(--color-gray-400); }

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-narrow {
    max-width: 720px;
}

.container-wide {
    max-width: 1400px;
}

.section {
    padding: var(--space-4xl) 0;
}

.section-dark {
    background-color: var(--color-charcoal);
    color: var(--color-off-white);
}

.section-dark h1, .section-dark h2, .section-dark h3 {
    color: var(--color-white);
}

/* ============================================
   HEADER / NAVIGATION (Bootstrap 5 overrides)
   ============================================ */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
}

.navbar-brand:hover {
    color: var(--color-charcoal);
}

.navbar-nav .nav-link {
    color: var(--color-gray-600);
    font-weight: 500;
    padding: 0.5rem 1rem;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--color-charcoal);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--color-charcoal);
    color: var(--color-white);
    border-color: var(--color-charcoal);
}

.btn-primary:hover {
    background: var(--color-black);
    border-color: var(--color-black);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-charcoal);
    border-color: var(--color-gray-300);
}

.btn-secondary:hover {
    border-color: var(--color-charcoal);
    background: var(--color-gray-100);
}

.btn-accent {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.btn-accent:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-gray-600);
    border-color: transparent;
}

.btn-ghost:hover {
    background: var(--color-gray-100);
    color: var(--color-charcoal);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.8rem;
}

.btn-full {
    width: 100%;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    padding: var(--space-4xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-lg);
}

.hero-badge .badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero h1 {
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-3xl);
    margin-top: var(--space-3xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--color-gray-200);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-charcoal);
    display: block;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-gray-500);
}

/* ============================================
   UPLOAD BOX
   ============================================ */
.upload-container {
    max-width: 600px;
    margin: 0 auto;
}

.upload-box {
    background: var(--color-white);
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-lg);
    padding: var(--space-3xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
}

.upload-box:hover {
    border-color: var(--color-accent);
    background: var(--color-off-white);
}

.upload-box.drag-over {
    border-color: var(--color-accent);
    background: rgba(184, 134, 11, 0.05);
    transform: scale(1.01);
}

.upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    background: var(--color-gray-100);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-gray-500);
    transition: all var(--transition-base);
}

.upload-box:hover .upload-icon {
    background: var(--color-charcoal);
    color: var(--color-accent);
}

.upload-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--color-charcoal);
    margin-bottom: var(--space-sm);
}

.upload-subtitle {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-lg);
}

.upload-limit {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--color-gray-600);
}

/* File List */
.file-list {
    margin-top: var(--space-lg);
    text-align: left;
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
}

.file-icon {
    width: 40px;
    height: 40px;
    background: var(--color-white);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: var(--color-charcoal);
    font-size: 0.9rem;
}

.file-size {
    font-size: 0.8rem;
    color: var(--color-gray-500);
}

.file-remove {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--color-gray-400);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.file-remove:hover {
    background: var(--color-danger);
    color: var(--color-white);
}

/* Upload Options */
.upload-options {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
}

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

.option-group:last-child {
    margin-bottom: 0;
}

.option-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-sm);
}

.option-description {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    margin-top: var(--space-xs);
}

/* Upload Mode Options */
.upload-mode-options {
    display: flex;
    gap: var(--space-xs);
}

.mode-option {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-fast);
}

.mode-option:hover {
    background: var(--color-gray-200);
}

.mode-option.active {
    background: var(--color-white);
    border-color: var(--color-charcoal);
}

.mode-option input[type="radio"] {
    display: none;
}

.mode-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-gray-700);
}

.mode-option.active .mode-label {
    color: var(--color-charcoal);
}

/* ============================================
   FORM CONTROLS
   ============================================ */
.form-control {
    width: 100%;
    padding: var(--space-md);
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-charcoal);
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.1);
}

.form-control::placeholder {
    color: var(--color-gray-400);
}

select.form-control {
    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='%236b6b6b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-md) center;
    padding-right: var(--space-3xl);
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-icon {
    width: 48px;
    height: 48px;
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.card-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.card-text {
    font-size: 0.9rem;
    color: var(--color-gray-600);
    margin: 0;
}

/* ============================================
   FEATURE GRID
   ============================================ */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.feature-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
}

.feature-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: var(--color-charcoal);
    color: var(--color-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.feature-content h4 {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.feature-content p {
    font-size: 0.85rem;
    color: var(--color-gray-600);
    margin: 0;
}

/* ============================================
   HOW IT WORKS
   ============================================ */
.steps-container {
    display: flex;
    gap: var(--space-xl);
    justify-content: center;
    flex-wrap: wrap;
}

.step-item {
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    text-align: center;
    position: relative;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--color-charcoal);
    color: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin: 0 auto var(--space-md);
}

.step-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.step-desc {
    font-size: 0.9rem;
    color: var(--color-gray-600);
}

/* Connector line between steps */
.step-item:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 24px;
    left: calc(50% + 40px);
    width: calc(100% - 48px);
    height: 2px;
    background: var(--color-gray-200);
}

@media (max-width: 768px) {
    .step-item::after {
        display: none;
    }
}

/* ============================================
   TESTIMONIALS
   ============================================ */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.testimonial-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    font-family: var(--font-serif);
    font-size: 4rem;
    color: var(--color-gray-200);
    position: absolute;
    top: var(--space-md);
    left: var(--space-lg);
    line-height: 1;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-gray-700);
    margin-bottom: var(--space-lg);
    padding-top: var(--space-lg);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.testimonial-avatar {
    width: 48px;
    height: 48px;
    background: var(--color-gray-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--color-gray-600);
}

.testimonial-name {
    font-weight: 600;
    color: var(--color-charcoal);
}

.testimonial-role {
    font-size: 0.85rem;
    color: var(--color-gray-500);
}

/* ============================================
   SECURITY BADGES
   ============================================ */
.security-badges {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
    padding: var(--space-xl) 0;
}

.security-badge {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--color-gray-700);
}

.security-badge .badge-icon {
    color: var(--color-success);
}

/* ============================================
   FAQ / ACCORDION
   ============================================ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-gray-200);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) 0;
    background: none;
    border: none;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-charcoal);
    text-align: left;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-accent);
}

.faq-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-inner {
    padding-bottom: var(--space-lg);
    font-size: 0.95rem;
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ============================================
   PRICING / PLANS
   ============================================ */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    position: relative;
}

.pricing-card.featured {
    border-color: var(--color-accent);
}

.pricing-card.featured::before {
    content: 'Most Popular';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: var(--color-white);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-name {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-charcoal);
}

.pricing-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-gray-500);
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: var(--space-xl) 0;
    text-align: left;
}

.pricing-features li {
    padding: var(--space-sm) 0;
    font-size: 0.9rem;
    color: var(--color-gray-700);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.pricing-features li::before {
    content: '✓';
    color: var(--color-success);
    font-weight: 600;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--color-charcoal);
    color: var(--color-gray-400);
    padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-brand {
    max-width: 280px;
}

.footer-brand .site-logo {
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-heading {
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-lg);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-gray-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-size: 0.85rem;
}

.footer-badges {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.footer-badge {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--color-gray-400);
}

/* ============================================
   PASSWORD DISPLAY
   ============================================ */
.password-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-md);
    background: var(--color-gray-100);
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 1.5rem;
    letter-spacing: 0.25em;
    font-weight: 600;
    color: var(--color-charcoal);
}

.password-char {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-white);
    border-radius: var(--radius-sm);
    min-width: 2rem;
    text-align: center;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }
.mt-5 { margin-top: var(--space-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }
.mb-5 { margin-bottom: var(--space-2xl); }

.py-1 { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-2 { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.py-3 { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }
.py-4 { padding-top: var(--space-xl); padding-bottom: var(--space-xl); }
.py-5 { padding-top: var(--space-2xl); padding-bottom: var(--space-2xl); }

.hidden { display: none !important; }
.visible { display: block !important; }


/* ============================================
   PROGRESS BAR
   ============================================ */
.progress-bar-container {
    width: 100%;
    height: 8px;
    background: var(--color-gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: var(--space-md) 0;
}

.progress-bar {
    height: 100%;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

/* ============================================
   ENCRYPTION ANIMATION
   ============================================ */
.encryption-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
}

.encrypt-icon {
    width: 60px;
    height: 60px;
    background: var(--color-charcoal);
    color: var(--color-accent);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    animation: lockPulse 2s infinite;
}

@keyframes lockPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

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

.encrypt-dot {
    width: 8px;
    height: 8px;
    background: var(--color-gray-300);
    border-radius: 50%;
    animation: flowDot 1.5s infinite;
}

.encrypt-dot:nth-child(2) { animation-delay: 0.2s; }
.encrypt-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes flowDot {
    0%, 100% { background: var(--color-gray-300); }
    50% { background: var(--color-accent); }
}

/* ============================================
   UPLOADER COMPONENT (for main.js compatibility)
   ============================================ */
.uploader {
    background: var(--color-white);
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    overflow: hidden;
}

.uploader:hover {
    border-color: var(--color-accent);
}

.uploader-empty {
    padding: var(--space-3xl) var(--space-xl);
    text-align: center;
    cursor: pointer;
}

.uploader-empty .drop-icon {
    color: var(--color-gray-400);
    margin-bottom: var(--space-lg);
}

.uploader-empty .drop-icon svg {
    width: 48px;
    height: 48px;
}

.uploader-empty h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--color-charcoal);
    margin: 0 0 var(--space-sm);
}

.uploader-empty p {
    color: var(--color-gray-500);
    margin: 0;
    font-size: 0.95rem;
}

.uploader-empty .browse-link {
    color: var(--color-accent);
    text-decoration: underline;
    font-weight: 500;
}

.uploader-empty .upload-hint {
    margin-top: var(--space-lg);
    font-size: 0.85rem;
    color: var(--color-gray-400);
}

.uploader-empty .upload-hint a {
    color: var(--color-accent);
}

.uploader-not-empty {
    display: none;
    background: var(--color-gray-50);
}

.uploader-not-empty .preview-wrapper {
    list-style: none;
    padding: var(--space-md);
    margin: 0;
    max-height: 300px;
    overflow-y: auto;
}

.uploader-not-empty .preview-wrapper li {
    padding: var(--space-sm) var(--space-md);
    background: var(--color-white);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.uploader-not-empty .preview-wrapper li > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.uploader-not-empty .file-name {
    font-weight: 500;
    color: var(--color-charcoal);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.uploader-not-empty .file-size {
    color: var(--color-gray-500);
    font-size: 0.85rem;
    margin-left: var(--space-md);
}

.uploader-not-empty .remove-file {
    cursor: pointer;
    color: var(--color-gray-400);
    margin-left: var(--space-md);
    transition: color var(--transition-fast);
}

.uploader-not-empty .remove-file:hover {
    color: var(--color-danger);
}

.add-more {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-top: 1px dashed var(--color-gray-300);
    color: var(--color-gray-500);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.add-more:hover {
    color: var(--color-accent);
    background: var(--color-gray-100);
}

.add-more-icon svg {
    width: 20px;
    height: 20px;
}

.total-size-row {
    padding: var(--space-sm) var(--space-md);
    background: var(--color-gray-100);
    text-align: right;
    font-size: 0.85rem;
    color: var(--color-gray-600);
}