/* ===== CSS Variables & Base Styles ===== */
:root {
    /* Colors */
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;
    
    --accent-cyan: #22d3ee;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Dark Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.7);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: rgba(148, 163, 184, 0.1);
    --border-hover: rgba(148, 163, 184, 0.2);
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
}

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

/* ===== Animated Background ===== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary-500));
    bottom: -150px;
    left: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
    opacity: 0.2;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -30px) scale(1.05); }
    50% { transform: translate(-30px, 50px) scale(0.95); }
    75% { transform: translate(-50px, -20px) scale(1.02); }
}

/* ===== Container ===== */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-4);
}

/* ===== Glass Card ===== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--glass-shadow);
}

/* ===== Header ===== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
    margin-bottom: var(--space-8);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-purple));
    border-radius: var(--radius-lg);
    color: white;
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

.logo-icon.small {
    width: 32px;
    height: 32px;
}

.logo-icon.small svg {
    width: 18px;
    height: 18px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: var(--space-6);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
}

.nav-link:hover {
    color: var(--text-primary);
}

/* ===== Hero Section ===== */
.hero {
    text-align: center;
    margin-bottom: var(--space-12);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--primary-300);
    margin-bottom: var(--space-6);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-6);
}

.gradient-text {
    display: block;
    background: linear-gradient(135deg, var(--primary-400), var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ===== Email Card ===== */
.email-card {
    padding: var(--space-8);
    margin-bottom: var(--space-8);
    position: relative;
}

.email-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.email-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.auto-refresh {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.toggle-wrapper {
    position: relative;
    width: 44px;
    height: 24px;
    cursor: pointer;
}

.toggle-wrapper input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    left: 3px;
    top: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-base);
}

.toggle-wrapper input:checked + .toggle-slider {
    background: var(--primary-500);
}

.toggle-wrapper input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

/* ===== Email Generator ===== */
.email-generator {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.email-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-1);
    transition: border-color var(--transition-base);
}

.email-input-wrapper:focus-within {
    border-color: var(--primary-500);
}

.email-input {
    flex: 1;
    min-width: 0;
    padding: var(--space-4) var(--space-5);
    background: transparent;
    border: none;
    outline: none;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
    font-family: inherit;
}

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

.email-at {
    color: var(--text-muted);
    font-size: 1.125rem;
    font-weight: 500;
    padding: 0 var(--space-2);
}

.domain-select {
    padding: var(--space-4) var(--space-5);
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 500;
    color: var(--primary-300);
    cursor: pointer;
    outline: none;
    appearance: none;
    padding-right: var(--space-10);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    background-size: 16px;
}

.domain-select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.email-actions {
    display: flex;
    gap: var(--space-3);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    flex: 1;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-400), var(--primary-500));
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.btn-icon {
    width: 52px;
    height: 52px;
    padding: 0;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-icon:hover {
    color: var(--primary-400);
    border-color: var(--primary-500);
    transform: rotate(180deg);
}

/* ===== Copy Toast ===== */
.copy-toast {
    position: absolute;
    bottom: var(--space-4);
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--success);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.copy-toast svg {
    width: 16px;
    height: 16px;
}

.copy-toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ===== Inbox Section ===== */
.inbox-section {
    margin-bottom: var(--space-12);
}

.inbox-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.inbox-header h2 {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1.25rem;
    font-weight: 600;
}

.inbox-header h2 svg {
    width: 24px;
    height: 24px;
    color: var(--primary-400);
}

.email-count {
    padding: var(--space-2) var(--space-4);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.email-count span {
    font-weight: 600;
    color: var(--primary-400);
}

.inbox-container {
    min-height: 300px;
    padding: var(--space-6);
}

/* ===== Inbox States ===== */
.inbox-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-16) var(--space-4);
    text-align: center;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--space-4);
}

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

.inbox-state p {
    color: var(--text-secondary);
}

.empty-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-4);
}

.empty-icon svg {
    width: 32px;
    height: 32px;
    color: var(--text-muted);
}

.inbox-state h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-2);
}

/* ===== Email List ===== */
.email-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.email-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.email-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-500);
    transform: translateX(4px);
}

.email-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-purple));
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: 1.125rem;
    color: white;
    flex-shrink: 0;
}

.email-content {
    flex: 1;
    min-width: 0;
}

.email-from {
    font-weight: 600;
    margin-bottom: var(--space-1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-subject {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-preview {
    color: var(--text-muted);
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-2);
    flex-shrink: 0;
}

.email-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.email-badge {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--primary-400);
}

.email-badge svg {
    width: 12px;
    height: 12px;
}

/* ===== Features Section ===== */
.features-section {
    padding: var(--space-12) 0;
}

.section-title {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--space-10);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-6);
}

.feature-card {
    padding: var(--space-6);
    text-align: center;
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-purple));
    border-radius: var(--radius-xl);
    margin: 0 auto var(--space-4);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* ===== Footer ===== */
.footer {
    padding: var(--space-8) 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-4);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 600;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: var(--space-4);
    font-size: 0.875rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-links a:hover {
    color: var(--primary-400);
}

.footer-links .divider {
    color: var(--text-muted);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.open {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 700px;
    max-height: 80vh;
    overflow: auto;
    padding: var(--space-8);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        transform: scale(0.95) translateY(20px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.modal-close:hover {
    background: var(--error);
    color: white;
}

.modal-close svg {
    width: 18px;
    height: 18px;
}

.modal-header {
    margin-bottom: var(--space-6);
    padding-right: var(--space-10);
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.modal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.modal-body {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
}

.modal-body a {
    color: var(--primary-400);
}

.modal-attachments {
    margin-top: var(--space-6);
}

.modal-attachments h4 {
    font-size: 0.9375rem;
    margin-bottom: var(--space-3);
}

#attachmentList {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.attachment-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-base);
}

.attachment-item:hover {
    background: var(--primary-500);
    color: white;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: var(--space-4);
    }
    
    .nav {
        gap: var(--space-4);
    }
    
    .email-input-wrapper {
        flex-wrap: wrap;
    }
    
    .email-input {
        width: 100%;
        padding: var(--space-3) var(--space-4);
    }
    
    .email-at {
        display: none;
    }
    
    .domain-select {
        flex: 1;
        margin-left: var(--space-1);
    }
    
    .email-actions {
        flex-wrap: wrap;
    }
    
    .btn-primary, .btn-secondary {
        flex: 1 1 auto;
        min-width: 120px;
    }
    
    .email-item {
        flex-wrap: wrap;
    }
    
    .email-meta {
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
        margin-top: var(--space-2);
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--space-4) var(--space-3);
    }
    
    .email-card {
        padding: var(--space-5);
    }
    
    .email-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
}