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

:root {
    --primary: #1a2e4a;
    --accent: #e85d24;
    --accent-hover: #d14a15;
    --gold: #c8952e;
    --light: #f8f9fb;
    --text: #2c3e50;
    --muted: #6b7c93;
    --white: #ffffff;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; color: var(--text); line-height: 1.6; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* Nav */
#navbar {
    position: fixed; top: 0; width: 100%; z-index: 1000;
    background: rgba(26,46,74,0.95); backdrop-filter: blur(10px);
    padding: 16px 0; transition: padding 0.3s;
}
.nav-container { max-width: 1140px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { color: var(--white); text-decoration: none; font-weight: 700; font-size: 1.2rem; }
.nav-logo span { color: var(--accent); }
.nav-links { list-style: none; display: flex; align-items: center; gap: 28px; }
.nav-links a { color: rgba(255,255,255,0.85); text-decoration: none; font-size: 0.9rem; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--white); }
.btn-nav { background: var(--accent); color: var(--white) !important; padding: 8px 20px; border-radius: 6px; }
.btn-nav:hover { background: var(--accent-hover); }
.nav-toggle { display: none; background: none; border: none; color: var(--white); font-size: 1.5rem; cursor: pointer; }

/* Hero */
#hero {
    position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #1a2e4a 0%, #2d4a6f 50%, #1a2e4a 100%);
    text-align: center; padding: 120px 24px 80px;
}
.hero-overlay {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(232,93,36,0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(200,149,46,0.1) 0%, transparent 50%);
}
.hero-content { position: relative; max-width: 800px; }
.hero-tag { color: var(--accent); font-weight: 600; font-size: 1rem; margin-bottom: 16px; letter-spacing: 0.5px; }
#hero h1 { color: var(--white); font-size: clamp(2.5rem, 6vw, 4rem); font-weight: 800; margin-bottom: 20px; line-height: 1.1; }
.hero-sub { color: rgba(255,255,255,0.8); font-size: 1.15rem; margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto; }

/* Buttons */
.btn-primary {
    display: inline-block; background: var(--accent); color: var(--white); padding: 14px 32px;
    border-radius: 8px; text-decoration: none; font-weight: 600; font-size: 1rem; border: none; cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); }
.btn-secondary {
    display: inline-block; border: 2px solid var(--accent); color: var(--accent); padding: 12px 28px;
    border-radius: 8px; text-decoration: none; font-weight: 600; transition: all 0.2s;
}
.btn-secondary:hover { background: var(--accent); color: var(--white); }

/* Sections */
.section { padding: 100px 0; }
.section-alt { background: var(--light); }
.section h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 16px; color: var(--primary); }
.section-intro { color: var(--muted); font-size: 1.05rem; margin-bottom: 40px; max-width: 640px; }
.section-intro a { color: var(--accent); }

/* About */
.about-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 60px; align-items: start; }
.about-text p { margin-bottom: 16px; font-size: 1.05rem; }
.about-details { display: flex; flex-direction: column; gap: 16px; }
.detail-card { background: var(--white); padding: 20px 24px; border-radius: var(--radius); box-shadow: var(--shadow); border-left: 4px solid var(--accent); }
.detail-card h4 { margin-bottom: 4px; font-size: 0.95rem; }

/* Speakers */
.speakers-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px; }
.speaker-card { text-align: center; padding: 32px 24px; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); }
.speaker-photo { width: 100px; height: 100px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--accent)); margin: 0 auto 16px; opacity: 0.3; }
.speaker-card h4 { margin-bottom: 4px; }
.speaker-card p { color: var(--muted); font-size: 0.9rem; }

/* Programme */
.programme-days { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; }
.day-card { background: var(--white); padding: 32px; border-radius: var(--radius); box-shadow: var(--shadow); border-top: 4px solid var(--accent); }
.day-card h3 { color: var(--primary); margin-bottom: 4px; }
.day-theme { color: var(--accent); font-weight: 600; margin-bottom: 16px; }
.day-card ul { list-style: none; }
.day-card li { padding: 8px 0; border-bottom: 1px solid #eee; font-size: 0.95rem; }
.day-card li:last-child { border-bottom: none; }
.programme-note { margin-top: 32px; color: var(--muted); font-style: italic; }

/* App */
.app-content { display: grid; grid-template-columns: 1.5fr 1fr; gap: 60px; align-items: center; }
.app-features { list-style: none; margin: 16px 0; }
.app-features li { padding: 6px 0; font-size: 1rem; }
.app-note { color: var(--muted); font-style: italic; margin-top: 16px; }
.phone-frame { width: 220px; height: 420px; background: var(--primary); border-radius: 36px; padding: 12px; margin: 0 auto; box-shadow: var(--shadow); }
.phone-screen { height: 100%; background: linear-gradient(180deg, var(--accent), var(--gold)); border-radius: 24px; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.phone-title { color: var(--white); font-size: 1.5rem; font-weight: 800; }
.phone-subtitle { color: rgba(255,255,255,0.8); font-size: 1rem; }
.phone-btn { margin-top: 20px; background: var(--white); color: var(--accent); padding: 8px 20px; border-radius: 20px; font-weight: 600; font-size: 0.85rem; }

/* Dinner */
.dinner-badge { display: inline-block; background: var(--gold); color: var(--white); padding: 4px 14px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; }
.dinner-text p { margin-bottom: 12px; font-size: 1.05rem; }

/* Sponsors */
.sponsors-content { text-align: center; }
.sponsor-tier { margin-bottom: 40px; }
.sponsor-tier h3 { color: var(--muted); font-weight: 500; margin-bottom: 16px; text-transform: uppercase; font-size: 0.9rem; letter-spacing: 1px; }
.sponsor-logo-box { display: inline-block; padding: 32px 60px; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); }
.sponsor-name { font-size: 1.4rem; font-weight: 700; color: var(--primary); }
.sponsor-cta { margin-top: 40px; }
.sponsor-cta p { margin-bottom: 16px; color: var(--muted); }

/* Forms */
.form { max-width: 680px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 500; margin-bottom: 6px; font-size: 0.9rem; }
.form-group input, .form-group textarea {
    width: 100%; padding: 12px 16px; border: 1px solid #ddd; border-radius: 8px;
    font-family: inherit; font-size: 1rem; transition: border-color 0.2s;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); }

/* Tickets */
.tickets-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 32px; }
.ticket-card {
    background: var(--white); padding: 40px 32px; border-radius: var(--radius); box-shadow: var(--shadow);
    text-align: center; position: relative; border: 2px solid transparent; transition: transform 0.2s;
}
.ticket-card:hover { transform: translateY(-4px); }
.ticket-card.featured { border-color: var(--accent); }
.ticket-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--accent); color: var(--white); padding: 4px 16px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; }
.ticket-card h3 { font-size: 1.3rem; margin-bottom: 8px; }
.ticket-price { font-size: 2.5rem; font-weight: 800; color: var(--primary); margin-bottom: 24px; }
.ticket-price span { font-size: 1rem; font-weight: 400; color: var(--muted); }
.ticket-card ul { list-style: none; margin-bottom: 28px; text-align: left; }
.ticket-card li { padding: 8px 0; border-bottom: 1px solid #f0f0f0; font-size: 0.95rem; }
.ticket-card li::before { content: "✓ "; color: var(--accent); font-weight: 700; }
.ticket-note { margin-top: 12px; font-size: 0.8rem; color: var(--muted); }

/* Footer */
footer { background: var(--primary); color: rgba(255,255,255,0.8); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; margin-bottom: 40px; }
footer h4 { color: var(--white); margin-bottom: 12px; }
footer ul { list-style: none; }
footer li { margin-bottom: 8px; }
footer a { color: rgba(255,255,255,0.7); text-decoration: none; }
footer a:hover { color: var(--white); }
.footer-copy { text-align: center; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.85rem; }

/* Responsive */
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; width: 100%; background: var(--primary); padding: 20px; gap: 16px; }
    .nav-links.active { display: flex; }
    .about-grid, .app-content { grid-template-columns: 1fr; gap: 40px; }
    .form-row { grid-template-columns: 1fr; }
    .section { padding: 60px 0; }
}