/* style.css */
:root {
    /* Color Palette */
    --primary-color: #0A192F;      /* Deep Navy */
    --primary-light: #112240;      /* Lighter Navy */
    --secondary-color: #FACC15;    /* Gold / Amber */
    --secondary-dark: #EAB308;     /* Dark Gold */
    --text-primary: #F3F4F6;       /* Near White */
    --text-secondary: #9CA3AF;     /* Light Gray */
    --bg-dark: #020C1B;            /* Deep Background */
    --bg-card: #112240;            /* Card Background */
    --bg-lighter: #233554;         /* Hover State Background */
    
    /* Functional Colors */
    --accent-marketing: #F43F5E;   /* Rose Red */
    --accent-finance: #10B981;     /* Emerald Green */
    --accent-hr: #3B82F6;          /* Blue */
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Playfair Display', serif;
    
    /* Spacing & Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 8px;
    --container-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* For fixed header */
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

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

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

/* Typography Utilities */
.section-title {
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
}

.section-title .underline {
    width: 60px;
    height: 4px;
    background-color: var(--secondary-color);
    margin-top: 0.5rem;
    border-radius: 2px;
}

.section-title.text-center .underline {
    margin-left: auto;
    margin-right: auto;
}

.section-subtitle {
    font-family: var(--font-primary);
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 1rem;
}

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    font-family: var(--font-primary);
}

.btn-primary {
    background-color: var(--secondary-color);
    color: var(--bg-dark);
    border: 2px solid var(--secondary-color);
}

.btn-primary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(250, 204, 21, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.btn-secondary:hover {
    background-color: rgba(250, 204, 21, 0.1);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Header */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(10, 25, 47, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    z-index: 1000;
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 2rem;
    color: var(--secondary-color);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-heading);
    line-height: 1;
}

.logo-subtitle {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#navbar {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links li a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition);
    position: relative;
}

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

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

.nav-links li a:hover {
    color: var(--secondary-color);
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px; /* Offset header */
    background: url('college-bg.jpg') center/cover no-repeat;
    overflow: hidden;
}

/* Soft glowing orb effect in the background */
.hero::before {
    content: '';
    position: absolute;
    top: 20%;
    right: 10%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(250, 204, 21, 0.05) 0%, rgba(10, 25, 47, 0) 70%);
    border-radius: 50%;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(2, 12, 27, -1.82) 0%,
        rgba(10, 25, 47, 0.75) 60%,
        rgba(2, 12, 27, 0.75) 100%
    );
    z-index: 1;
}

.hero-container {
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-content {
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: rgba(250, 204, 21, 0.1);
    color: var(--secondary-color);
    border-radius: 50px;
    border: 1px solid rgba(250, 204, 21, 0.3);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: 1px;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(to right, var(--text-primary), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-subtitle {
    font-size: 2rem;
    font-family: var(--font-heading);
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

/* About Section */
.about {
    padding: 6rem 0;
    background-color: var(--primary-color);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.about-card {
    background-color: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-5px);
    border-color: rgba(250, 204, 21, 0.3);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.about-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.about-card p {
    color: var(--text-secondary);
}

/* Schedule Section */
.schedule {
    padding: 6rem 0;
    background-color: var(--bg-dark);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 4rem auto 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 150px;
    height: 100%;
    width: 2px;
    background: rgba(255,255,255,0.1);
}

.timeline-item {
    display: flex;
    margin-bottom: 2rem;
    position: relative;
}

.timeline-time {
    width: 150px;
    padding-right: 2rem;
    text-align: right;
    font-weight: 600;
    color: var(--secondary-color);
    font-family: var(--font-primary);
    padding-top: 5px;
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: 146px; /* 150px - 4px width */
    top: 10px;
    width: 10px;
    height: 10px;
    background-color: var(--bg-card);
    border: 2px solid var(--secondary-color);
    border-radius: 50%;
    z-index: 1;
}

.timeline-content {
    flex: 1;
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255,255,255,0.05);
    margin-left: 2rem;
    position: relative;
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.timeline-content h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.speaker-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-primary);
    background-color: var(--bg-lighter);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
}

.speaker-tag i {
    color: var(--secondary-color);
}

/* Timeline Custom Themes */
.timeline-item.break .timeline-content {
    background-color: transparent;
    border: 1px dashed rgba(255,255,255,0.2);
    padding: 1rem 2rem;
    text-align: center;
}
.timeline-item.break .timeline-time {
    color: var(--text-secondary);
}
.timeline-item.break::after {
    border-color: var(--text-secondary);
}

.timeline-content.marketing-theme { border-left: 4px solid var(--accent-marketing); }
.timeline-content.finance-theme { border-left: 4px solid var(--accent-finance); }
.timeline-content.hr-theme { border-left: 4px solid var(--accent-hr); }
.timeline-content.highlight-theme { border-left: 4px solid var(--secondary-color); }
.timeline-content.panel-theme { border-left: 4px solid #A855F7; }

/* Speakers Section */
.speakers {
    padding: 6rem 0;
    background-color: var(--primary-color);
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.speaker-card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.05);
    display: flex;
    flex-direction: column;
}

.speaker-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    border-color: rgba(255,255,255,0.1);
}

.speaker-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.speaker-avatar {
    width: 60px;
    height: 60px;
    background-color: var(--bg-lighter);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.speaker-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.designation {
    font-size: 0.85rem;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: var(--font-primary);
    font-weight: 600;
}

.speaker-body h4 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.speaker-body p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    flex-grow: 1;
}

.panel-card .speaker-avatar {
    background-color: rgba(168, 85, 247, 0.1);
    color: #A855F7;
}

.highlight-card {
    background: linear-gradient(145deg, var(--bg-card), var(--primary-light));
    border-color: rgba(250, 204, 21, 0.2);
}

.highlight-card .speaker-avatar {
    background-color: var(--secondary-color);
    color: var(--bg-dark);
}

/* CTA Section */
.cta-section {
    padding: 6rem 0;
    background-color: var(--secondary-color);
    color: var(--bg-dark);
}

.cta-section h2 {
    color: var(--bg-dark);
    font-size: 2.5rem;
}

.cta-section p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    border-color: var(--bg-dark);
}

.cta-button:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

/* Footer */
footer {
    background-color: #01060E;
    padding: 4rem 0 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-info h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-info p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-links h4, .footer-contact h4 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.footer-contact i {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .timeline::before {
        left: 0;
    }
    
    .timeline-item {
        flex-direction: column;
    }
    
    .timeline-time {
        width: 100%;
        text-align: left;
        padding-right: 0;
        padding-bottom: 0.5rem;
        padding-left: 2rem;
    }
    
    .timeline-item::after {
        left: -5px;
        top: 2px;
    }
    
    .timeline-content {
        margin-left: 20px;
    }
    
    .footer-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    #navbar {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--bg-dark);
        flex-direction: column;
        justify-content: center;
        transition: var(--transition);
        padding: 2rem;
    }
    
    #navbar.active {
        left: 0;
    }
    
    .nav-links {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        font-size: 1.25rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}