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

:root {
    --primary-color: #6A6CCF;
    --primary-light: rgba(106, 108, 207, 0.6);
    --primary-ultra-light: rgba(106, 108, 207, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.3);
    --text-dark: #2c3e50;
    --text-light: #ffffff;
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 15px 40px rgba(0, 0, 0, 0.15);
    --shadow-strong: 0 25px 50px rgba(0, 0, 0, 0.25);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --border-radius: 20px;
    --border-radius-small: 12px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: url('../images/background.jpg') no-repeat center center fixed;
    background-size: cover;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

/* Background Overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg,
        rgba(106, 108, 207, 0.2) 0%,
        rgba(106, 108, 207, 0.1) 50%,
        rgba(255, 255, 255, 0.1) 100%);
    z-index: -1;
}

/* Hero Header */
.hero-header {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 2rem;
}

.hero-content {
    backdrop-filter: blur(20px);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 4rem 3rem;
    max-width: 900px;
    width: 100%;
    box-shadow: var(--shadow-strong);
    animation: heroEntry 1.2s ease-out;
}

@keyframes heroEntry {
    0% {
        opacity: 0;
        transform: translateY(60px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: titleGlow 3s ease-in-out infinite alternate;
}

.hero-title .emoji {
    display: inline-block;
    animation: bounce 2s infinite;
}

@keyframes titleGlow {
    0% { text-shadow: 0 4px 20px rgba(255, 255, 255, 0.3); }
    100% { text-shadow: 0 4px 30px rgba(255, 255, 255, 0.6); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-light);
    opacity: 0.9;
    max-width: 750px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out 0.5s both;
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    cursor: pointer;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: floating 2s ease-in-out infinite;
}

.scroll-indicator:hover {
    transform: translateX(-50%) scale(1.1);
    opacity: 1;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid var(--text-light);
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
    opacity: 0.7;
}

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

/* Main Container */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Content Sections */
.content-section {
    margin: 4rem 0;
    animation: slideInView 0.8s ease-out;
}

@keyframes slideInView {
    0% {
        opacity: 0;
        transform: translateY(40px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Glass Cards */
.glass-card {
    backdrop-filter: blur(25px);
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 3rem;
    box-shadow: var(--shadow-medium);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.glass-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-strong);
}

/* Section Titles */
.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

/* Content Grids */
.content-grid {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
}

.concepts-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 2rem;
}

.concept-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-small);
    padding: 2rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.concept-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-medium);
}

.top-concepts {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 0.5rem;
}

.top-concepts .concept-card {
    flex: 1;
    max-width: 350px;
}

.concept-card.full-width {
    grid-column: 1 / -1;
}

.concept-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.stats-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.stat-item {
    background: rgba(106, 108, 207, 0.1);
    padding: 1.5rem;
    border-radius: var(--border-radius-small);
    border-left: 4px solid var(--primary-color);
}

.highlight {
    background: linear-gradient(135deg, #ba5cca 0%, #d9517e 100%);
    color: white;
    padding: 1rem;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    text-align: center;
    margin-top: 1rem;
}

/* Prerequisites Grid */
.prereq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.prereq-card {
    background: var(--primary-ultra-light);
    padding: 2rem;
    border-radius: var(--border-radius-small);
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.prereq-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.prereq-card h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.prereq-card ul {
    padding-left: 1.5rem;
}

.prereq-card li {
    margin-bottom: 0.5rem;
}


/* Dashboard Section */
.dashboard-section {
    margin: 6rem 0;
}

.tip {
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.3);
    padding: 1rem;
    border-radius: var(--border-radius-small);
    margin-top: 1rem;
    font-style: italic;
    text-align: center;
}

.dashboard-container {
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: inset 0 4px 20px rgba(0, 0, 0, 0.1);
}

.dashboard-container iframe {
    width: 100%;
    height: 70vh;
    min-height: 600px;
    border: none;
    border-radius: var(--border-radius-small);
    box-shadow: var(--shadow-medium);
}

/* Insights Table */
.insights-container {
    margin-top: 2rem;
}

.insights-table {
    display: grid;
    gap: 1px;
    background: var(--primary-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
}

.table-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--primary-color);
}

.header-cell {
    padding: 1.5rem;
    background: var(--primary-color);
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    text-align: center;
}

.table-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: white;
}

.table-row:nth-child(even) {
    background: rgba(106, 108, 207, 0.05);
}

.insight-cell, .action-cell {
    padding: 1.5rem;
    border-right: 1px solid var(--primary-ultra-light);
}

.action-cell {
    border-right: none;
    background: rgba(106, 108, 207, 0.02);
}

/* Links Section */
.links-intro {
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.links-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.link-card {
    display: flex;
    align-items: center;
    padding: 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-small);
    text-decoration: none;
    color: var(--text-dark);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-soft);
}

.link-card:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: var(--shadow-medium);
    text-decoration: none;
    color: var(--text-dark);
}

.link-icon {
    font-size: 2.5rem;
    margin-right: 1.5rem;
    animation: pulse 2s infinite;
}

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

.link-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.link-content p {
    opacity: 0.8;
    margin: 0;
}

/* Footer */
.footer {
    margin-top: 6rem;
    padding: 3rem 2rem;
    text-align: center;
    backdrop-filter: blur(20px);
    background: var(--primary-light);
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    font-size: 1.1rem;
    color: white;
    margin: 0;
}

.heart {
    animation: heartbeat 1.5s ease-in-out infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-content {
        padding: 2.5rem 2rem;
    }

    .glass-card {
        padding: 2rem;
    }

    .concepts-grid {
        grid-template-columns: 1fr;
    }

    .table-header,
    .table-row {
        grid-template-columns: 1fr;
    }

    .insight-cell,
    .action-cell {
        border-right: none;
        border-bottom: 1px solid var(--primary-ultra-light);
    }

    .dashboard-container iframe {
        height: 60vh;
        min-height: 400px;
    }

    .links-container {
        grid-template-columns: 1fr;
    }

    .link-card {
        flex-direction: column;
        text-align: center;
    }

    .link-icon {
        margin-right: 0;
        margin-bottom: 1rem;
    }
}

@media (max-width: 480px) {
    .main-container {
        padding: 0 1rem;
    }

    .hero-header {
        padding: 1rem;
    }

    .hero-content {
        padding: 2rem 1.5rem;
    }

    .glass-card {
        padding: 1.5rem;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-accent);
}