/* Modern UI/UX Enhancements for TempMail */

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-bg: #1e293b;
    --light-bg: #f8fafc;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --card-hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--primary-gradient);
    min-height: 100vh;
    color: #334155;
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

/* Animated background particles */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

/* Enhanced Header */
.header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    padding: 1.25rem 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

.nav {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo::before {
    content: '✉️';
    font-size: 1.5rem;
    -webkit-text-fill-color: initial;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: #64748b;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition);
}

.nav-links a:hover {
    color: #667eea;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Enhanced Container */
.container {
    max-width: 1280px;
    margin: 3rem auto;
    padding: 0 2rem;
    position: relative;
    z-index: 10;
}

/* Enhanced Main Card */
.main-card {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    padding: 3rem;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Enhanced Email Display Section */
.email-section {
    background: linear-gradient(135deg, #f6f8fb 0%, #fff 100%);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid rgba(226, 232, 240, 0.8);
    position: relative;
    overflow: hidden;
}

.email-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-gradient);
}

.email-display {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    border: 2px solid #e2e8f0;
    transition: var(--transition);
}

.email-display:hover {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.current-email {
    flex: 1;
    font-size: 1.125rem;
    font-weight: 600;
    color: #1e293b;
    font-family: 'Courier New', monospace;
    letter-spacing: 0.5px;
}

/* Enhanced Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #f1f5f9;
    color: #475569;
}

.btn-secondary:hover {
    background: #e2e8f0;
    transform: translateY(-2px);
}

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

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(16, 185, 129, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #fecaca 0%, #fca5a5 100%);
    transform: translateY(-2px);
}

/* Copy Button Enhancement */
.copy-btn {
    position: relative;
}

.copy-btn.copied::after {
    content: '✓ Copied!';
    position: absolute;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: #10b981;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    animation: fadeInOut 2s ease-in-out;
    pointer-events: none;
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0; }
    10%, 90% { opacity: 1; }
}

/* Enhanced Inbox Section */
.inbox-section {
    margin-top: 3rem;
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--card-shadow);
}

.inbox-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f1f5f9;
}

.inbox-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.message-count {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Enhanced Message List */
.message-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message-item {
    padding: 1.25rem;
    background: #f8fafc;
    border-radius: 10px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.message-item:hover {
    background: white;
    border-color: #e2e8f0;
    box-shadow: var(--card-shadow);
    transform: translateX(5px);
}

.message-item.unread {
    background: linear-gradient(135deg, #fef3c7 0%, #fff 100%);
    border-left: 4px solid #f59e0b;
}

.message-item.unread::before {
    content: 'NEW';
    position: absolute;
    top: 10px;
    right: 10px;
    background: #f59e0b;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
}

.message-item.selected {
    background: white;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.message-from {
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.message-subject {
    color: #64748b;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.message-time {
    color: #94a3b8;
    font-size: 0.875rem;
}

/* Enhanced Message View */
.message-view {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: var(--card-shadow);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.message-header {
    border-bottom: 2px solid #f1f5f9;
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.message-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.message-body {
    padding: 1.5rem;
    background: #f8fafc;
    border-radius: 8px;
    min-height: 200px;
    font-size: 1rem;
    line-height: 1.8;
}

/* Enhanced Timer Display */
.expire-timer {
    background: linear-gradient(135deg, #fef3c7 0%, #fed7aa 100%);
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: #92400e;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.expire-timer::before {
    content: '⏱️';
    font-size: 1.25rem;
}

/* Enhanced Footer */
.footer {
    text-align: center;
    padding: 3rem 0;
    color: white;
    margin-top: 4rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    transform: translateY(-2px);
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
        margin: 2rem auto;
    }
    
    .main-card {
        padding: 2rem 1.5rem;
    }
    
    .nav {
        padding: 0 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .email-display {
        flex-direction: column;
        gap: 1rem;
    }
    
    .message-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: var(--card-hover-shadow);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideInRight 0.3s ease-out;
    z-index: 1000;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

/* Smooth Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}