/* CSS Variables for Sky Blue Glassmorphism Theme */
:root {
    --primary-color: #005eff;
    --secondary-color: #00b0fb;
    --accent-color: #7dd3fc;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #00d9ff;
    
    /* Sky Blue Glassmorphism Variables */
    --glass-bg: rgba(14, 165, 233, 0.1);
    --glass-border: rgba(125, 211, 252, 0.3);
    --glass-shadow: 0 8px 32px 0 rgba(14, 165, 233, 0.2);
    --glass-backdrop: blur(12px);
    
    --background-gradient: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 50%, #7dd3fc 100%);
    --surface-gradient: linear-gradient(145deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.08) 100%);
    --text-color: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-on-glass: #0f172a;
    --text-light: #ffffff;
    
    --border-radius: 20px;
    --border-radius-small: 12px;
    --border-radius-large: 30px;
}

[data-theme="dark"] {
    --background-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    --glass-bg: rgba(30, 41, 59, 0.3);
    --glass-border: rgba(125, 211, 252, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
    --surface-gradient: linear-gradient(145deg, rgba(125, 211, 252, 0.1) 0%, rgba(125, 211, 252, 0.05) 100%);
    --text-color: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-on-glass: #f1f5f9;
    --text-light: #ffffff;
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background: var(--background-gradient);
    background-attachment: fixed;
    color: var(--text-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(14, 165, 233, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(56, 189, 248, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(125, 211, 252, 0.2) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    position: relative;
    z-index: 1;
}

h1, h2, h3 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3rem;
    text-align: center;
    background-color: #d4d7dd;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 3rem;
    text-shadow: 0 0 30px rgba(14, 165, 233, 0.3);
    filter: drop-shadow(0 2px 4px rgba(14, 165, 233, 0.2));
}

/* Theme Switcher */
.theme-switcher {
    position: fixed;
    top: 30px;
    right: 30px;
    z-index: 1000;
}

.theme-btn {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.3);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.theme-btn:hover {
    transform: scale(1.1) rotate(180deg);
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 12px 40px rgba(14, 165, 233, 0.4);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Notification Banner */
.notification-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    padding: 20px;
    text-align: center;
    transform: translateY(-100%);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
}

.notification-banner.show {
    transform: translateY(0);
}

.notification-banner.success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.3) 0%, rgba(52, 211, 153, 0.3) 100%);
    border-bottom: 2px solid rgba(16, 185, 129, 0.4);
}

.notification-banner.warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.3) 0%, rgba(251, 191, 36, 0.3) 100%);
    border-bottom: 2px solid rgba(245, 158, 11, 0.4);
}

.notification-banner.error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.3) 0%, rgba(248, 113, 113, 0.3) 100%);
    border-bottom: 2px solid rgba(239, 68, 68, 0.4);
}

.notification-banner.info {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.3) 0%, rgba(34, 211, 238, 0.3) 100%);
    border-bottom: 2px solid rgba(6, 182, 212, 0.4);
}

.notification-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    color: var(--text-light);
    font-weight: 600;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    font-size: 1.1rem;
}

.close-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: var(--text-light);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px 12px;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
    font-weight: bold;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Section Styling */
section {
    margin-bottom: 4rem;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border-radius: var(--border-radius);
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(14, 165, 233, 0.15);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(125, 211, 252, 0.6), transparent);
}

section:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(14, 165, 233, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.2);
}

section h2 {
    color: var(--text-on-glass);
    font-weight: 700;
    font-size: 2rem;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.1);
}

/* Slider Styles */
.slider-container {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 12px 40px rgba(14, 165, 233, 0.2);
}

.slider {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide {
    min-width: 100%;
    position: relative;
}

.slide img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    opacity: 0.9;
}

.slide-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(15, 23, 42, 0.8));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-light);
    padding: 3rem;
    text-align: center;
}

.slide-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
    color: var(--text-light);
    font-weight: 700;
}

.slide-content p {
    font-size: 1.1rem;
    opacity: 0.95;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.7);
    color: var(--text-light);
    font-weight: 500;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--text-light);
    padding: 15px 20px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--border-radius-small);
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.2);
    font-weight: bold;
}

.slider-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 10px 30px rgba(14, 165, 233, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.slider-btn.prev {
    left: 20px;
}

.slider-btn.next {
    right: 20px;
}

.slider-dots {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 25px;
}

.dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(4px);
    border: 2px solid rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dot.active {
    background: var(--primary-color);
    transform: scale(1.4);
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.6);
    border-color: var(--primary-color);
}

.dot:hover {
    transform: scale(1.2);
    background: rgba(255, 255, 255, 0.5);
}

/* FAQ Styles */
.faq-item {
    margin-bottom: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 2px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-small);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(14, 165, 233, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.15);
}

.faq-question {
    padding: 2rem;
    background: transparent;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    width: 100%;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-on-glass);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.1);
}

.faq-question:hover {
    background: rgba(14, 165, 233, 0.1);
    color: var(--primary-color);
}

.faq-icon {
    font-size: 1.2rem;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.8;
    color: var(--primary-color);
    font-weight: bold;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
    color: var(--secondary-color);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(4px);
}

.faq-answer.active {
    max-height: 250px;
}

.faq-answer-content {
    padding: 2rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
    font-weight: 500;
}

/* Cards Styles */
.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.card {
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(14, 165, 233, 0.15);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 60px rgba(14, 165, 233, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.18);
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover::after {
    opacity: 1;
}

.card h3 {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    filter: drop-shadow(0 1px 2px rgba(14, 165, 233, 0.2));
}

.card p {
    color: var(--text-on-glass);
    margin-bottom: 2rem;
    line-height: 1.6;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.1);
}

.card-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.card-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(14, 165, 233, 0.4);
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.action-btn {
    padding: 15px 30px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-large);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 1px;
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-on-glass);
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.15);
    position: relative;
    overflow: hidden;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.1);
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.action-btn:hover::before {
    left: 100%;
}

.action-btn.success {
    border-color: rgba(16, 185, 129, 0.5);
    color: var(--success-color);
}

.action-btn.warning {
    border-color: rgba(245, 158, 11, 0.5);
    color: var(--warning-color);
}

.action-btn.error {
    border-color: rgba(239, 68, 68, 0.5);
    color: var(--danger-color);
}

.action-btn.info {
    border-color: rgba(6, 182, 212, 0.5);
    color: var(--info-color);
}

.action-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(14, 165, 233, 0.3);
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Popup Styles */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.popup-overlay.show {
    opacity: 1;
    visibility: visible;
}

.popup-content {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 2px solid rgba(255, 255, 255, 0.2);
    padding: 3rem;
    border-radius: var(--border-radius);
    max-width: 550px;
    width: 90%;
    position: relative;
    transform: scale(0.8);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 25px 60px rgba(14, 165, 233, 0.3);
}

.popup-overlay.show .popup-content {
    transform: scale(1);
}

.popup-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-on-glass);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.popup-close:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
    transform: scale(1.1);
    border-color: rgba(239, 68, 68, 0.3);
}

.popup-content h3 {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 700;
    filter: drop-shadow(0 1px 2px rgba(14, 165, 233, 0.2));
}

.popup-content p {
    color: var(--text-on-glass);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.1);
}

.popup-content ul {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.popup-content li {
    margin-bottom: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.6;
    font-weight: 500;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    section {
        padding: 2rem;
        margin-bottom: 2rem;
    }
    
    .cards-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .slider-btn {
        padding: 10px 15px;
        font-size: 1.2rem;
    }
    
    .theme-switcher {
        top: 20px;
        right: 20px;
    }
    
    .theme-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .slide-content {
        padding: 2rem;
    }
    
    .slide-content h3 {
        font-size: 1.5rem;
    }
    
    .popup-content {
        padding: 2rem;
        margin: 20px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }
    
    .slide img {
        height: 250px;
    }
    
    .slide-content h3 {
        font-size: 1.3rem;
    }
    
    .slide-content p {
        font-size: 1rem;
    }
}

/* Animation Classes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.float {
    animation: float 3s ease-in-out infinite;
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}