:root {
    --primary: #2E7D32;
    --primary-light: #43A047;
    --primary-dark: #1B5E20;
    --primary-bg: rgba(46, 125, 50, 0.08);

    --secondary: #1565C0;
    --secondary-light: #1E88E5;
    --secondary-dark: #0D47A1;
    --secondary-bg: rgba(21, 101, 192, 0.08);

    --accent: #00897B;
    --accent-light: #26A69A;

    --white: #ffffff;
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #EEEEEE;
    --gray-300: #E0E0E0;
    --gray-400: #BDBDBD;
    --gray-500: #9E9E9E;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;

    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.15);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.2);

    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
    cursor: url('cursor.svg') 6 28, auto;
}
a, button, input, select, textarea { cursor: url('cursor-pointer.svg') 4 21, pointer; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
.text-accent { color: var(--primary); }

/* ============ BUTTONS ============ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.75rem 1.75rem; font-size: 0.9375rem; font-weight: 600;
    border-radius: var(--radius-md); border: 2px solid transparent;
    cursor: url('cursor-pointer.svg') 4 21, pointer; transition: var(--transition); white-space: nowrap;
    font-family: inherit;
}
.btn-lg { padding: 1rem 2.25rem; font-size: 1rem; }
.btn-block { width: 100%; }
.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.875rem; }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white); border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(46, 125, 50, 0.3);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    box-shadow: 0 6px 20px rgba(46, 125, 50, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent; border-color: var(--primary); color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary); color: var(--white);
}

.btn-outline-light {
    background: transparent; border-color: rgba(255,255,255,0.6); color: var(--white);
}
.btn-outline-light:hover {
    background: var(--white); color: var(--primary-dark); border-color: var(--white);
}

.btn-nav {
    background: var(--primary); color: var(--white); border-color: var(--primary);
    padding: 0.5rem 1.25rem; font-size: 0.875rem;
}
.btn-nav:hover {
    background: var(--primary-light); border-color: var(--primary-light);
    transform: translateY(-1px);
}

/* ============ TOP HEADER ============ */
.top-header {
    background: var(--primary-dark); color: rgba(255,255,255,0.8);
    padding: 0.5rem 0; font-size: 0.8125rem;
}
.top-header-container {
    max-width: 1200px; margin: 0 auto; padding: 0 1.5rem;
    display: flex; justify-content: space-between; align-items: center;
}
.top-header-left { display: flex; gap: 1.5rem; }
.top-contact { display: flex; align-items: center; gap: 0.5rem; color: rgba(255,255,255,0.8); }
.top-contact:hover { color: var(--white); }
.top-header-right { display: flex; align-items: center; gap: 1.25rem; }
.top-social { display: flex; gap: 0.75rem; }
.top-social a {
    color: rgba(255,255,255,0.6); width: 28px; height: 28px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-full); transition: var(--transition); font-size: 0.8rem;
}
.top-social a:hover { color: var(--white); background: rgba(255,255,255,0.15); }

.lang-switch { display: flex; gap: 0.25rem; background: rgba(255,255,255,0.1); border-radius: var(--radius-full); padding: 2px; }
.lang-btn {
    padding: 0.25rem 0.625rem; font-size: 0.75rem; font-weight: 600;
    border: none; border-radius: var(--radius-full); background: transparent;
    color: rgba(255,255,255,0.6); transition: var(--transition); cursor: url('cursor-pointer.svg') 4 21, pointer;
}
.lang-btn.active { background: var(--white); color: var(--primary-dark); }
.lang-btn:hover:not(.active) { color: var(--white); }

/* ============ NAVBAR ============ */
.navbar {
    position: sticky; top: 0; z-index: 1000;
    background: var(--white); border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-md); }
.navbar-container {
    max-width: 1200px; margin: 0 auto; padding: 0 1.5rem;
    display: flex; align-items: center; justify-content: space-between;
    height: 70px;
}
.navbar-logo { display: flex; align-items: center; gap: 0.75rem; }
.logo-icon { font-size: 1.75rem; color: var(--primary); }
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-main {
    font-family: 'Playfair Display', serif; font-size: 1.25rem;
    font-weight: 800; color: var(--primary-dark); letter-spacing: 0.02em;
}
.logo-sub { font-size: 0.6875rem; color: var(--gray-500); font-weight: 500; }
.navbar-menu { display: flex; gap: 0.125rem; }
.nav-link {
    padding: 0.5rem 0.75rem; font-size: 0.875rem; font-weight: 500;
    color: var(--gray-700); border-radius: var(--radius-md);
    transition: var(--transition); position: relative;
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-link.active::after {
    content: ''; position: absolute; bottom: -2px; left: 50%;
    transform: translateX(-50%); width: 20px; height: 3px;
    background: var(--primary); border-radius: var(--radius-full);
}
.navbar-actions { display: flex; align-items: center; gap: 1rem; }

.mobile-toggle {
    display: none; background: none; border: none; cursor: url('cursor-pointer.svg') 4 21, pointer;
    width: 35px; height: 35px; position: relative;
}
.mobile-toggle span {
    display: block; width: 24px; height: 2px; background: var(--gray-800);
    border-radius: 2px; position: absolute; left: 50%; transform: translateX(-50%);
    transition: var(--transition);
}
.mobile-toggle span:nth-child(1) { top: 10px; }
.mobile-toggle span:nth-child(2) { top: 17px; }
.mobile-toggle span:nth-child(3) { top: 24px; }

/* ============ MOBILE MENU ============ */
.mobile-menu {
    position: fixed; top: 0; right: -100%; width: 320px; height: 100vh;
    background: var(--white); z-index: 2000; transition: right 0.4s ease;
    display: flex; flex-direction: column; box-shadow: var(--shadow-xl);
}
.mobile-menu.active { right: 0; }
.mobile-menu-header {
    padding: 1.25rem 1.5rem; display: flex;
    align-items: center; justify-content: space-between;
    border-bottom: 1px solid var(--gray-200);
}
.mobile-logo { display: flex; align-items: center; gap: 0.75rem; font-weight: 700; color: var(--primary-dark); }
.mobile-logo i { font-size: 1.25rem; color: var(--primary); }
.mobile-close {
    background: none; border: none; font-size: 1.5rem;
    color: var(--gray-600); cursor: url('cursor-pointer.svg') 4 21, pointer;
}
.mobile-nav { flex: 1; padding: 1.5rem; display: flex; flex-direction: column; gap: 0.25rem; }
.mobile-link {
    padding: 0.875rem 1rem; font-size: 1rem; font-weight: 500;
    color: var(--gray-700); border-radius: var(--radius-md);
    transition: var(--transition);
}
.mobile-link:hover { background: var(--primary-bg); color: var(--primary); }
.mobile-btn { margin-top: 1rem; }
.mobile-social {
    padding: 1.25rem 1.5rem; border-top: 1px solid var(--gray-200);
    display: flex; gap: 1rem; justify-content: center;
}
.mobile-social a {
    width: 42px; height: 42px; display: flex; align-items: center; justify-content: center;
    background: var(--gray-100); color: var(--gray-600); border-radius: var(--radius-full);
    font-size: 1.125rem; transition: var(--transition);
}
.mobile-social a:hover { background: var(--primary); color: var(--white); }
.mobile-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.5);
    z-index: 1999; opacity: 0; visibility: hidden; transition: var(--transition);
}
.mobile-overlay.active { opacity: 1; visibility: visible; }

/* ============ HERO ============ */
.hero {
    min-height: 100vh; display: flex; align-items: center;
    position: relative; overflow: hidden;
    background: linear-gradient(135deg, var(--primary-dark), #0a3d0c);
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(21,101,192,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(46,125,50,0.2) 0%, transparent 40%),
        radial-gradient(circle at 60% 80%, rgba(0,137,123,0.15) 0%, transparent 50%);
}
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(27,94,32,0.88), rgba(13,71,161,0.82));
}
.hero-particles { position: absolute; inset: 0; pointer-events: none; }
.particle {
    position: absolute; border-radius: 50%;
    animation: particleFloat linear infinite;
}
@keyframes particleFloat {
    0%, 100% { opacity: 0.15; transform: translateY(0) rotate(0deg); }
    50% { opacity: 0.4; transform: translateY(-30px) rotate(180deg); }
}

.hero-container { position: relative; z-index: 2; }
.hero-content { width: 100%; padding: 2rem 0; margin: 0 auto; text-align: center; }
.hero-badge {
    display: inline-block; padding: 0.5rem 1.25rem;
    background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.25);
    color: rgba(255,255,255,0.9); font-size: 0.875rem; font-weight: 600;
    border-radius: var(--radius-full); margin-bottom: 1.5rem;
    text-transform: uppercase; letter-spacing: 0.05em;
}
.hero-title {
    font-family: 'Playfair Display', serif;
    font-size: 3.5rem; font-weight: 800; line-height: 1.1;
    color: var(--white); margin-bottom: 1.5rem;
}
.hero-highlight {
    color: #A5D6A7; font-style: italic;
}
.hero-description {
    font-size: 1.0625rem; color: rgba(255,255,255,0.85);
    margin-bottom: 2rem; line-height: 1.8;
}
.hero-buttons { display: flex; gap: 1rem; margin-bottom: 3rem; flex-wrap: wrap; justify-content: center; }
.hero-stats {
    display: flex; gap: 2rem; flex-wrap: wrap; justify-content: space-between;
    width: 100%; padding-top: 1rem;
    border-top: 1px solid rgba(255,255,255,0.15);
}
.stat-item { text-align: center; flex: 1 1 0; min-width: 120px; }
.stat-number {
    display: inline; font-family: 'Playfair Display', serif;
    font-size: 3.5rem; font-weight: 800; color: #A5D6A7; line-height: 1;
}
.stat-suffix {
    font-family: 'Playfair Display', serif;
    font-size: 2rem; font-weight: 700; color: #A5D6A7;
}
.stat-label {
    display: block; font-size: 1rem; color: rgba(255,255,255,0.8);
    font-weight: 600; margin-top: 0.5rem;
}
.hero-scroll {
    position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
    z-index: 2;
}
.hero-scroll a {
    display: flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; border: 2px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-full); color: rgba(255,255,255,0.7);
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
    60% { transform: translateY(-4px); }
}

/* ============ SECTIONS ============ */
.section { padding: 6rem 0; }
.section-header { text-align: center; max-width: 700px; margin: 0 auto 3.5rem; }
.section-tag {
    display: inline-block; padding: 0.375rem 1rem;
    background: var(--primary-bg); color: var(--primary-dark);
    font-size: 0.8125rem; font-weight: 600; border-radius: var(--radius-full);
    margin-bottom: 1rem; text-transform: uppercase; letter-spacing: 0.05em;
}
.tag-light { background: rgba(255,255,255,0.15); color: var(--white); }
.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem; font-weight: 700; color: var(--gray-900);
    margin-bottom: 1rem; line-height: 1.2;
}
.title-light { color: var(--white); }
.section-divider {
    width: 60px; height: 3px; background: var(--primary);
    border-radius: var(--radius-full); margin: 1rem auto;
}
.section-subtitle { font-size: 1rem; color: var(--gray-600); line-height: 1.7; }

/* ============ ABOUT ============ */
.section-about { background: var(--white); }
.about-grid {
    display: grid; grid-template-columns: 1.2fr 1fr;
    gap: 4rem; align-items: center;
}
.about-text { font-size: 1rem; color: var(--gray-600); margin-bottom: 1.25rem; line-height: 1.8; }
.about-features { display: flex; flex-direction: column; gap: 0.75rem; margin: 1.5rem 0 2rem; }
.about-feature {
    display: flex; align-items: center; gap: 0.75rem;
    font-size: 0.9375rem; color: var(--gray-700);
}
.about-feature i { color: var(--primary); font-size: 1.125rem; }

.about-visual { position: relative; }
.about-image-wrapper { position: relative; }
.about-image {
    width: 100%; border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}
.about-card {
    position: absolute; bottom: -30px; left: -30px;
    background: var(--white); padding: 1.25rem 1.75rem;
    border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
    display: flex; align-items: center; gap: 1rem;
}
.about-card-icon {
    width: 50px; height: 50px; background: var(--primary);
    border-radius: var(--radius-md); display: flex;
    align-items: center; justify-content: center;
    color: var(--white); font-size: 1.25rem;
}
.about-card h3 { font-size: 0.9375rem; font-weight: 700; color: var(--gray-900); }
.about-card p { font-size: 0.8125rem; color: var(--gray-500); }

/* ============ MISSION ============ */
.section-mission {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200); border-bottom: 1px solid var(--gray-200);
}
.mission-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
}
.mission-card {
    text-align: center; padding: 2.5rem 1.5rem;
    background: var(--white); border-radius: var(--radius-lg);
    transition: var(--transition); border: 1px solid var(--gray-200);
}
.mission-card:hover {
    transform: translateY(-5px); box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}
.mission-icon {
    width: 70px; height: 70px; margin: 0 auto 1.25rem;
    background: var(--primary-bg); border-radius: var(--radius-lg);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; color: var(--primary); transition: var(--transition);
}
.mission-card:hover .mission-icon {
    background: var(--primary); color: var(--white); transform: scale(1.05);
}
.mission-card h3 {
    font-size: 1.0625rem; font-weight: 700; color: var(--gray-900);
    margin-bottom: 0.75rem;
}
.mission-card p { font-size: 0.875rem; color: var(--gray-600); line-height: 1.7; }

/* ============ BOARD ============ */
.section-board { background: var(--white); }
.board-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem;
}
.board-card {
    text-align: center; padding: 2.5rem 2rem;
    background: var(--gray-50); border-radius: var(--radius-lg);
    transition: var(--transition); border: 1px solid var(--gray-200);
}
.board-card:hover {
    transform: translateY(-5px); box-shadow: var(--shadow-lg);
    background: var(--white); border-color: var(--secondary);
}
.board-avatar {
    width: 120px; height: 120px; margin: 0 auto 1.25rem;
    border-radius: 50%; overflow: hidden;
    border: 3px solid var(--primary-bg); background: var(--secondary-bg);
    display: flex; align-items: center; justify-content: center;
}
.board-avatar img { width: 100%; height: 100%; object-fit: cover; }
.board-card h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.125rem; font-weight: 700; color: var(--gray-900);
    margin-bottom: 0.25rem;
}
.board-role {
    display: inline-block; padding: 0.25rem 0.875rem;
    background: var(--primary); color: var(--white);
    font-size: 0.75rem; font-weight: 600; border-radius: var(--radius-full);
    margin-bottom: 0.5rem; text-transform: uppercase;
}
.board-specialty { font-size: 0.875rem; color: var(--gray-500); }

/* ============ CONFERENCE ============ */
.section-conference { background: var(--white); }
.conference-banner {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
    border-radius: var(--radius-xl); padding: 4rem;
    display: grid; grid-template-columns: 1.5fr 1fr;
    gap: 3rem; align-items: center; position: relative; overflow: hidden;
}
.conference-banner::before {
    content: ''; position: absolute; top: -40%; right: -10%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.08), transparent 70%);
    border-radius: 50%;
}
.conference-description {
    color: rgba(255,255,255,0.85); font-size: 1rem; line-height: 1.8;
    margin-bottom: 2rem; position: relative; z-index: 1;
}
.conference-details {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem;
    margin-bottom: 2rem; position: relative; z-index: 1;
}
.conf-detail {
    display: flex; align-items: center; gap: 1rem;
    color: var(--white);
}
.conf-detail i { font-size: 1.25rem; color: #A5D6A7; }
.conf-label {
    display: block; font-size: 0.75rem; color: rgba(255,255,255,0.6);
    text-transform: uppercase; letter-spacing: 0.05em;
}
.conf-value { font-weight: 600; font-size: 0.9375rem; }
.conference-buttons { display: flex; gap: 1rem; flex-wrap: wrap; position: relative; z-index: 1; }

.conference-visual { position: relative; z-index: 1; }
.conf-countdown {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem;
}
.countdown-item {
    background: rgba(255,255,255,0.1); backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-lg); padding: 1.5rem; text-align: center;
    color: var(--white);
}
.countdown-number {
    display: block; font-family: 'Playfair Display', serif;
    font-size: 2.5rem; font-weight: 800; line-height: 1;
    margin-bottom: 0.25rem;
}
.countdown-label { font-size: 0.8125rem; opacity: 0.7; }

/* ============ EVENTS ============ */
.section-events { background: var(--gray-50); }
.events-grid {
    display: flex; flex-direction: column; gap: 1rem;
}
.event-card {
    display: flex; align-items: center; gap: 1.5rem;
    background: var(--white); padding: 1.5rem 2rem;
    border-radius: var(--radius-lg); border: 1px solid var(--gray-200);
    transition: var(--transition);
}
.event-card:hover {
    box-shadow: var(--shadow-md); border-color: var(--primary);
    transform: translateX(5px);
}
.event-date {
    text-align: center; min-width: 70px;
    background: var(--primary-bg); border-radius: var(--radius-md);
    padding: 1rem; flex-shrink: 0;
}
.event-day {
    display: block; font-family: 'Playfair Display', serif;
    font-size: 1.75rem; font-weight: 800; color: var(--primary-dark); line-height: 1;
}
.event-month { font-size: 0.8125rem; color: var(--primary); font-weight: 600; text-transform: uppercase; }
.event-content { flex: 1; }
.event-type {
    display: inline-block; padding: 0.2rem 0.625rem;
    background: var(--secondary-bg); color: var(--secondary);
    font-size: 0.75rem; font-weight: 600; border-radius: var(--radius-full);
    margin-bottom: 0.5rem; text-transform: uppercase;
}
.event-content h3 { font-size: 1.0625rem; font-weight: 700; color: var(--gray-900); margin-bottom: 0.375rem; }
.event-content p { font-size: 0.875rem; color: var(--gray-500); display: flex; align-items: center; gap: 0.5rem; }
.event-content p i { color: var(--primary); font-size: 0.75rem; }

/* ============ EDUCATION ============ */
.section-education { background: var(--white); }
.education-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
}
.edu-card {
    padding: 2rem 1.5rem; background: var(--gray-50);
    border-radius: var(--radius-lg); transition: var(--transition);
    border: 1px solid var(--gray-200);
}
.edu-card:hover {
    transform: translateY(-5px); box-shadow: var(--shadow-lg);
    background: var(--white); border-color: var(--primary);
}
.edu-icon {
    width: 60px; height: 60px; margin-bottom: 1.25rem;
    background: var(--secondary-bg); border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.375rem; color: var(--secondary);
}
.edu-card h3 { font-size: 1rem; font-weight: 700; color: var(--gray-900); margin-bottom: 0.75rem; }
.edu-card p { font-size: 0.875rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 1rem; }
.edu-credits {
    display: inline-block; padding: 0.375rem 0.875rem;
    background: var(--primary-bg); color: var(--primary-dark);
    font-size: 0.8125rem; font-weight: 600; border-radius: var(--radius-full);
}

/* ============ PUBLICATIONS ============ */
.section-publications { background: var(--gray-50); }
.publications-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
    margin-bottom: 2rem;
}
.pub-card {
    background: var(--white); padding: 2rem;
    border-radius: var(--radius-lg); border: 1px solid var(--gray-200);
    transition: var(--transition);
}
.pub-card:hover {
    transform: translateY(-3px); box-shadow: var(--shadow-md);
    border-color: var(--secondary);
}
.pub-type {
    display: inline-block; padding: 0.25rem 0.75rem;
    background: var(--secondary-bg); color: var(--secondary);
    font-size: 0.75rem; font-weight: 600; border-radius: var(--radius-full);
    text-transform: uppercase; margin-bottom: 0.75rem;
}
.pub-card h3 { font-size: 1.0625rem; font-weight: 700; color: var(--gray-900); margin-bottom: 0.75rem; line-height: 1.4; }
.pub-author { font-size: 0.875rem; color: var(--gray-500); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem; }
.pub-author i { color: var(--primary); font-size: 0.75rem; }
.pub-desc { font-size: 0.875rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 1rem; }
.pub-date { font-size: 0.8125rem; font-weight: 600; color: var(--gray-400); }
.section-cta { text-align: center; }

/* ============ MEMBERSHIP ============ */
.section-membership { background: var(--white); }
.membership-grid {
    display: grid; grid-template-columns: 1fr 1.2fr; gap: 3rem; align-items: start;
}
.membership-types { display: flex; flex-direction: column; gap: 1rem; }
.membership-card {
    background: var(--gray-50); padding: 2rem;
    border-radius: var(--radius-lg); border: 1px solid var(--gray-200);
    transition: var(--transition);
}
.membership-card:hover { box-shadow: var(--shadow-md); border-color: var(--primary); }
.membership-icon {
    width: 50px; height: 50px; margin-bottom: 1rem;
    background: var(--primary-bg); border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem; color: var(--primary);
}
.membership-card h3 { font-size: 1.0625rem; font-weight: 700; color: var(--gray-900); margin-bottom: 0.5rem; }
.membership-card > p { font-size: 0.875rem; color: var(--gray-500); margin-bottom: 1rem; }
.membership-benefits { display: flex; flex-direction: column; gap: 0.5rem; }
.membership-benefits li {
    display: flex; align-items: center; gap: 0.625rem;
    font-size: 0.875rem; color: var(--gray-700);
}
.membership-benefits li i { color: var(--primary); font-size: 0.8125rem; }

.membership-form-wrapper {
    background: var(--gray-50); border-radius: var(--radius-xl);
    padding: 2.5rem; border: 1px solid var(--gray-200);
}
.membership-form-wrapper h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem; font-weight: 700; color: var(--gray-900);
    margin-bottom: 1.5rem;
}

/* ============ CONTACT ============ */
.section-contact { background: var(--gray-50); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 2.5rem; }
.contact-info { display: flex; flex-direction: column; gap: 1rem; }
.contact-card {
    display: flex; align-items: flex-start; gap: 1rem;
    padding: 1.25rem; background: var(--white);
    border-radius: var(--radius-lg); transition: var(--transition);
    border: 1px solid var(--gray-200);
}
.contact-card:hover { box-shadow: var(--shadow-md); border-color: var(--primary); }
.contact-icon {
    width: 45px; height: 45px; flex-shrink: 0;
    background: var(--primary-bg);
    border-radius: var(--radius-md); display: flex;
    align-items: center; justify-content: center;
    color: var(--primary); font-size: 1rem;
}
.contact-card h4 { font-size: 0.9375rem; font-weight: 600; color: var(--gray-900); margin-bottom: 0.25rem; }
.contact-card p { font-size: 0.875rem; color: var(--gray-600); line-height: 1.6; }

.contact-form-wrapper {
    background: var(--white); border-radius: var(--radius-xl);
    padding: 2.5rem; box-shadow: var(--shadow-lg); border: 1px solid var(--gray-200);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label {
    display: block; font-size: 0.875rem; font-weight: 600;
    color: var(--gray-700); margin-bottom: 0.5rem;
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 0.75rem 1rem; font-size: 0.9375rem;
    border: 2px solid var(--gray-200); border-radius: var(--radius-md);
    transition: var(--transition); font-family: inherit;
    background: var(--white); color: var(--gray-800);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select { appearance: none; cursor: url('cursor-pointer.svg') 4 21, pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23616161' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 1rem center; padding-right: 2.5rem;
}

.checkbox-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem;
}
.checkbox-label {
    display: flex; align-items: center; gap: 0.625rem;
    cursor: url('cursor-pointer.svg') 4 21, pointer; font-size: 0.875rem; color: var(--gray-700);
}
.checkbox-label input { display: none; }
.checkmark {
    width: 20px; height: 20px; border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm); display: flex;
    align-items: center; justify-content: center;
    transition: var(--transition); flex-shrink: 0;
}
.checkbox-label input:checked + .checkmark {
    background: var(--primary); border-color: var(--primary);
}
.checkbox-label input:checked + .checkmark::after {
    content: '\2713'; color: var(--white); font-size: 0.75rem; font-weight: 700;
}

.form-message {
    padding: 1rem; border-radius: var(--radius-md); margin-bottom: 1rem;
    font-size: 0.9375rem; font-weight: 500;
}
.form-message.success { background: var(--primary-bg); color: var(--primary-dark); border: 1px solid rgba(46,125,50,0.2); }
.form-message.error { background: rgba(239,68,68,0.08); color: #dc2626; border: 1px solid rgba(239,68,68,0.2); }

/* ============ FOOTER ============ */
.footer {
    background: var(--gray-900); color: rgba(255,255,255,0.7);
    padding: 4rem 0 0;
}
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem; padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-logo {
    display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem;
}
.footer-logo i { font-size: 2rem; color: var(--primary-light); }
.footer-logo .logo-main { font-family: 'Playfair Display', serif; font-size: 1.5rem; font-weight: 800; color: var(--white); }
.footer-logo .logo-sub { font-size: 0.75rem; color: rgba(255,255,255,0.5); }
.footer-tagline {
    font-size: 0.9375rem; color: rgba(255,255,255,0.5);
    margin-bottom: 1.5rem;
}
.footer-social { display: flex; gap: 0.75rem; }
.footer-social a {
    width: 42px; height: 42px; display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.08); border-radius: var(--radius-md);
    color: rgba(255,255,255,0.6); font-size: 1rem; transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: var(--white); transform: translateY(-2px); }

.footer-links h4 {
    font-size: 1rem; font-weight: 600; color: var(--white);
    margin-bottom: 1.25rem;
}
.footer-links ul { display: flex; flex-direction: column; gap: 0.625rem; }
.footer-links a { font-size: 0.875rem; transition: var(--transition); color: rgba(255,255,255,0.6); }
.footer-links a:hover { color: var(--primary-light); padding-left: 5px; }

.footer-bottom {
    padding: 1.5rem 0; text-align: center;
    font-size: 0.8125rem; opacity: 0.6;
}

/* ============ BACK TO TOP ============ */
.back-to-top {
    position: fixed; bottom: 2rem; right: 2rem;
    width: 48px; height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none; border-radius: var(--radius-full);
    display: flex; align-items: center; justify-content: center;
    color: var(--white); font-size: 1.125rem; cursor: url('cursor-pointer.svg') 4 21, pointer;
    opacity: 0; visibility: hidden; transform: translateY(20px);
    transition: var(--transition); box-shadow: var(--shadow-lg); z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); box-shadow: var(--shadow-xl); }

/* ============ FADE IN ============ */
.fade-in {
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ============ LOADING SPINNER ============ */
.loading {
    display: inline-block; width: 20px; height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top-color: var(--white);
    border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
    .navbar-menu { display: none; }
    .mobile-toggle { display: block; }
    .btn-nav { display: none; }
    .hero-title { font-size: 2.75rem; }
    .about-grid { grid-template-columns: 1fr; gap: 3rem; }
    .about-visual { order: -1; }
    .mission-grid { grid-template-columns: repeat(2, 1fr); }
    .board-grid { grid-template-columns: repeat(2, 1fr); }
    .education-grid { grid-template-columns: repeat(2, 1fr); }
    .conference-banner { grid-template-columns: 1fr; padding: 2.5rem; }
    .conf-countdown { max-width: 300px; }
    .publications-grid { grid-template-columns: 1fr; }
    .membership-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .top-header { display: none; }
    .section { padding: 4rem 0; }
    .section-title { font-size: 2rem; }
    .hero-title { font-size: 2.25rem; }
    .hero { min-height: auto; padding: 6rem 0 4rem; }
    .hero-stats { gap: 2rem; }
    .stat-number { font-size: 2.5rem; }
    .mission-grid, .education-grid { grid-template-columns: 1fr; }
    .board-grid { grid-template-columns: 1fr; }
    .event-card { flex-direction: column; text-align: center; }
    .form-row, .checkbox-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; text-align: center; }
    .footer-social { justify-content: center; }
    .conference-details { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.85rem; }
    .hero-buttons { flex-direction: column; }
    .hero-buttons .btn { width: 100%; }
    .hero-stats { flex-direction: column; gap: 1.5rem; }
    .conference-banner { padding: 1.5rem; }
    .contact-form-wrapper, .membership-form-wrapper { padding: 1.5rem; }
}

/* ===== VALUES SECTION ===== */
.section-values { background: var(--gray-50); }
.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.value-item {
    background: #fff;
    border-radius: 16px;
    padding: 2rem 1.5rem;
    text-align: center;
    box-shadow: 0 2px 16px rgba(0,0,0,0.06);
    border-top: 4px solid var(--primary-blue);
    transition: transform 0.3s, box-shadow 0.3s;
}
.value-item:nth-child(2n) { border-top-color: var(--primary-green); }
.value-item:nth-child(3) { border-top-color: var(--primary-green); }
.value-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.1);
}
.value-icon {
    width: 72px; height: 72px;
    margin: 0 auto 1.25rem;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, rgba(21,101,192,0.1), rgba(46,125,50,0.1));
    color: var(--primary-blue);
    font-size: 1.75rem;
}
.value-item:nth-child(2n) .value-icon { color: var(--primary-green); }
.value-item:nth-child(3) .value-icon { color: var(--primary-green); }
.value-item h4 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}
.value-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .values-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .values-grid { grid-template-columns: 1fr; }
}
/* ===== BLOG MODAL ===== */
.modal-overlay {
    position: fixed; inset: 0; z-index: 9999;
    background: rgba(0,0,0,0.6);
    display: flex; align-items: center; justify-content: center;
    padding: 2rem;
    animation: fadeIn 0.3s;
}
.modal-content {
    background: #fff; border-radius: 16px;
    max-width: 800px; width: 100%;
    max-height: 85vh; overflow-y: auto;
    padding: 2.5rem;
    position: relative;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.modal-close {
    position: absolute; top: 1rem; right: 1rem;
    background: #f1f5f9; border: none; border-radius: 50%;
    width: 40px; height: 40px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; color: #64748b;
    transition: all 0.2s;
}
.modal-close:hover { background: #fee2e2; color: #dc2626; }
.pub-content-view { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px; padding: 2rem; margin-top: 1rem; line-height: 1.8; }
.pub-content-view h3 { color: var(--primary-dark, #1b5e20); margin: 1.25rem 0 0.5rem; font-size: 1.2rem; }
.pub-content-view h4 { color: #374151; margin: 1rem 0 0.5rem; font-size: 1.05rem; }
.pub-content-view ul, .pub-content-view ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.pub-content-view li { margin-bottom: 0.35rem; }
.pub-content-view p { margin-bottom: 0.75rem; }
@media (max-width: 768px) {
    .modal-content { padding: 1.5rem; margin: 1rem; }
    .modal-overlay { padding: 1rem; }
}