/* ============================================
   Rainforest Micro-Colloquium 2026 - Main Styles
   ============================================ */

/* ---- Root Variables ---- */
:root {
    --color-primary: #1a472a;
    --color-primary-light: #2d5a3d;
    --color-primary-lighter: #4a9d6f;
    --color-accent: #8b7355;
    --color-accent-light: #b8956f;
    --color-text: #333;
    --color-text-light: #666;
    --color-text-white: #fff;
    --color-bg: #f5f3f0;
    --color-border: #ddd;
    --spacing: 1rem;
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
}

/* ---- Container ---- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing);
}

/* ============================================
   Navigation Bar
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-text-white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
}

.logo-icon {
    font-size: 2rem;
}

.logo-text {
    color: var(--color-text-white);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    transition: var(--transition);
}

/* Hamburger Menu Button */
.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 0.4rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--color-text-white);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-link {
    color: var(--color-text-white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary-lighter);
    transition: width 0.3s ease;
}

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

.nav-link.active {
    color: var(--color-primary-lighter);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: 0;
    margin: 0;
    position: relative;
    overflow: hidden;
    width: 100%;
    display: block;
}

.hero::before {
    display: none;
}

.hero-image {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}

.hero-overlay {
    display: none;
}

.hero-content {
    display: none;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    font-style: italic;
}

.hero-meta {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.date-badge,
.location-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

/* Countdown Timer */
.countdown-container {
    margin: 3rem 0;
    animation: fadeInUp 0.8s ease 0.3s backwards;
}

.countdown-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

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

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    padding: 1.5rem;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    min-width: 100px;
    backdrop-filter: blur(10px);
}

.countdown-number {
    font-size: 2.5rem;
    font-weight: bold;
    line-height: 1;
    color: #fff;
    font-family: 'Courier New', monospace;
}

.countdown-label {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-top: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* CTA Button */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary-lighter) 0%, var(--color-accent-light) 100%);
    color: var(--color-text-white);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: 80px 20px;
}

.section-title {
    font-size: 2.5rem;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--color-primary-lighter), var(--color-accent));
    border-radius: 2px;
}

/* ============================================
   About Section
   ============================================ */
.about {
    background-color: var(--color-text-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text h3 {
    color: var(--color-primary);
    margin: 1.5rem 0 0.8rem 0;
    font-size: 1.3rem;
}

.about-text p {
    color: var(--color-text-light);
    margin-bottom: 1rem;
    text-align: justify;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.highlight-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-text-white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.highlight-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.highlight-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.highlight-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.highlight-card p {
    font-size: 0.95rem;
    opacity: 0.95;
}

/* ============================================
   Target Section
   ============================================ */
.target {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-text-white);
}

.target-box {
    background: rgba(255, 255, 255, 0.1);
    padding: 2.5rem;
    border-radius: 15px;
    border-left: 5px solid var(--color-primary-lighter);
    backdrop-filter: blur(10px);
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
}

.target-box strong {
    color: var(--color-primary-lighter);
}

/* ============================================
   Research Section
   ============================================ */
.research {
    background-color: var(--color-text-white);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.research-item {
    background: linear-gradient(135deg, rgba(26, 71, 42, 0.05) 0%, rgba(74, 157, 111, 0.1) 100%);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(26, 71, 42, 0.1);
    transition: var(--transition);
}

.research-item:hover {
    background: linear-gradient(135deg, rgba(26, 71, 42, 0.1) 0%, rgba(74, 157, 111, 0.15) 100%);
    border-color: var(--color-primary-lighter);
    transform: translateY(-3px);
}

.research-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 1rem;
}

.research-item h4 {
    color: var(--color-primary);
    font-size: 1rem;
}

/* ============================================
   Programme Section
   ============================================ */
.program {
    background: linear-gradient(135deg, rgba(26, 71, 42, 0.03) 0%, rgba(139, 115, 85, 0.03) 100%);
}

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

.highlight-item {
    background: var(--color-text-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--color-primary-lighter);
    transition: var(--transition);
}

.highlight-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.highlight-item h4 {
    color: var(--color-primary);
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.highlight-item p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ============================================
   Schedule/Timeline Section
   ============================================ */
.schedule {
    background-color: var(--color-text-white);
}

.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--color-primary-lighter), var(--color-accent));
}

.timeline-item {
    margin-bottom: 2.5rem;
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-date {
    text-align: right;
    width: 45%;
    padding-right: 2rem;
}

.timeline-item:nth-child(even) .timeline-date {
    text-align: left;
    width: 45%;
    margin-left: 55%;
    padding-left: 2rem;
}

.timeline-item:nth-child(odd) .timeline-content {
    width: 45%;
    margin-left: 55%;
    padding-left: 2rem;
}

.timeline-item:nth-child(even) .timeline-content {
    text-align: right;
    width: 45%;
    padding-right: 2rem;
}

.timeline-date {
    position: relative;
    font-weight: 600;
    color: var(--color-primary);
    font-size: 1.1rem;
}

.timeline-date::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    border: 4px solid var(--color-text-white);
    border-radius: 50%;
    top: 5px;
    right: -38px;
    box-shadow: 0 0 0 3px var(--color-primary-lighter);
}

.timeline-item:nth-child(even) .timeline-date::after {
    left: -38px;
    right: auto;
}

.timeline-content {
    background: linear-gradient(135deg, rgba(26, 71, 42, 0.05) 0%, rgba(139, 115, 85, 0.05) 100%);
    padding: 1.5rem;
    border-radius: 10px;
    margin-top: 0.5rem;
    border-left: 3px solid var(--color-primary-lighter);
}

.timeline-item:nth-child(even) .timeline-content {
    border-left: none;
    border-right: 3px solid var(--color-primary-lighter);
}

.timeline-content h4 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.timeline-content p {
    color: var(--color-text-light);
    margin-bottom: 0;
}

.sub-timeline {
    margin-top: 1rem;
}

.sub-item {
    background: var(--color-text-white);
    padding: 0.8rem 1rem;
    margin: 0.5rem 0;
    border-radius: 8px;
    border-left: 3px solid var(--color-accent);
    font-size: 0.95rem;
}

.sub-item strong {
    color: var(--color-primary);
}

/* ============================================
   Details Section
   ============================================ */
.details {
    background: linear-gradient(135deg, rgba(26, 71, 42, 0.03) 0%, rgba(139, 115, 85, 0.03) 100%);
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.detail-card {
    background: var(--color-text-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-top: 4px solid var(--color-primary-lighter);
}

.detail-card h4 {
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.detail-card p {
    color: var(--color-text-light);
    margin-bottom: 0;
}

.detail-list {
    list-style: none;
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.detail-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border);
    position: relative;
    padding-left: 1.5rem;
}

.detail-list li:last-child {
    border-bottom: none;
}

.detail-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary-lighter);
    font-weight: bold;
}

/* ============================================
   Registration Section
   ============================================ */
.registration {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-text-white);
}

.registration-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.dates-box {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dates-box h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--color-primary-lighter);
}

.date-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.date-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.date-item strong {
    display: block;
    color: var(--color-primary-lighter);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.date-item p {
    color: rgba(255, 255, 255, 0.95);
    margin: 0;
}

.submit-box {
    background: rgba(255, 255, 255, 0.15);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.submit-box h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary-lighter);
}

.submit-box p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.submit-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary-lighter) 0%, var(--color-accent-light) 100%);
    color: var(--color-text-white);
    padding: 0.9rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
    display: inline-block;
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.submission-details {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-top: 1rem;
}

/* ============================================
   Target and Registration Section Titles
   ============================================ */
.target .section-title,
.registration .section-title {
    color: var(--color-text-white);
}

.target .section-title::after,
.registration .section-title::after {
    background: linear-gradient(to right, var(--color-primary-lighter), var(--color-accent-light));
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background-color: var(--color-text-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.organiser-info,
.contact-persons {
    background: linear-gradient(135deg, rgba(26, 71, 42, 0.05) 0%, rgba(139, 115, 85, 0.05) 100%);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--color-primary-lighter);
}

.organiser-info h3,
.contact-persons h3 {
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.organiser-info p {
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

.address {
    background: var(--color-text-white);
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    border-left: 3px solid var(--color-accent);
    font-size: 0.95rem;
}

.collaboration {
    color: var(--color-primary);
    font-weight: 500;
}

.person-card {
    background: var(--color-text-white);
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    border-top: 3px solid var(--color-primary);
}

.person-card:last-child {
    margin-bottom: 0;
}

.person-card h4 {
    color: var(--color-primary);
    margin-bottom: 0.8rem;
}

.contact-link {
    display: inline-block;
    color: var(--color-primary-lighter);
    text-decoration: none;
    font-weight: 600;
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

.contact-link:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.phone {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin: 0;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-primary);
    color: var(--color-text-white);
    padding: 2rem;
    text-align: center;
}

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

.footer-content p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
}

.footer-tagline {
    opacity: 0.8;
    font-size: 0.9rem;
    font-style: italic;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

section {
    animation: fadeInUp 0.6s ease backwards;
}