/* ===================================
   Workshop Design Thinking 2026
   Blue + Green Creative Theme
   =================================== */

:root {
  --color-primary: #1E3A5F;
  --color-primary-dark: #0F2440;
  --color-primary-light: #2563EB;
  --color-accent: #059669;
  --color-accent-light: #D1FAE5;
  --color-accent-dark: #047857;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F0FDF4;
  --color-bg-warm: #F0F9FF;
  --color-bg-dark: #0F2440;
  --color-text: #1E293B;
  --color-text-light: #64748B;
  --color-text-white: #F1F5F9;
  --color-text-muted: #94A3B8;
  --color-border: #E2E8F0;
  --color-success: #059669;

  --font-display: 'Inter', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;

  --space-xs: 0.5rem;  --space-sm: 1rem;  --space-md: 1.5rem;
  --space-lg: 2.5rem;  --space-xl: 4rem;  --space-2xl: 6rem;

  --radius: 8px;  --radius-lg: 16px;  --radius-xl: 24px;  --radius-full: 50%;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: 0.3s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-body); color: var(--color-text); background: var(--color-bg); line-height: 1.7; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: var(--space-2xl) 0; }

/* Section Headers */
.section-label { display: inline-block; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; color: var(--color-accent); margin-bottom: var(--space-xs); }
.section-title { font-size: 2.5rem; font-weight: 800; color: var(--color-primary); line-height: 1.15; margin-bottom: var(--space-sm); letter-spacing: -0.02em; }
.section-title::after { content: ''; display: block; width: 60px; height: 3px; background: var(--color-accent); margin-top: var(--space-sm); border-radius: 2px; }
.text-accent { background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-subtitle { font-size: 1.1rem; color: var(--color-text-light); max-width: 600px; }
.section-header { margin-bottom: var(--space-xl); }
.section-header--center { text-align: center; }
.section-header--center .section-title::after { margin-left: auto; margin-right: auto; }
.section-header--center .section-subtitle { margin: 0 auto; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; font-family: var(--font-body); font-weight: 600; font-size: 1rem; border: none; border-radius: var(--radius); cursor: pointer; transition: var(--transition); line-height: 1; }
.btn-lg { padding: 1rem 2rem; font-size: 1.05rem; }
.btn-full { width: 100%; }
.btn-primary { background: var(--color-accent); color: white; box-shadow: 0 4px 15px rgba(5,150,105,0.3); }
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-2px); }
.btn-outline { background: transparent; color: white; border: 2px solid rgba(255,255,255,0.4); padding: 1rem 2rem; }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--color-accent); color: var(--color-accent); }
.btn-outline-dark { background: transparent; color: var(--color-primary); border: 2px solid var(--color-primary); padding: 0.875rem 2rem; }
.btn-outline-dark:hover { background: var(--color-primary); color: white; }

/* Navbar */
.navbar { position: fixed; top: 0; left: 0; width: 100%; z-index: 100; padding: 1rem 0; transition: var(--transition); }
.navbar.scrolled { background: rgba(30,58,95,0.95); backdrop-filter: blur(12px); padding: 0.625rem 0; box-shadow: 0 2px 20px rgba(0,0,0,0.2); }
.nav-container { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { font-size: 1.3rem; font-weight: 800; color: white; letter-spacing: -0.02em; }
.nav-logo .logo-accent { color: var(--color-accent); }
.nav-links { display: flex; align-items: center; gap: 1.75rem; list-style: none; }
.nav-links a { color: rgba(255,255,255,0.8); font-size: 0.9rem; font-weight: 500; transition: var(--transition); }
.nav-links a:hover { color: var(--color-accent); }
.nav-cta { background: var(--color-accent) !important; color: white !important; padding: 0.625rem 1.25rem; border-radius: var(--radius); font-weight: 700 !important; }
.nav-cta:hover { background: var(--color-accent-dark) !important; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span { width: 24px; height: 2px; background: white; border-radius: 2px; transition: var(--transition); }

/* Hero */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--color-primary); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(30,58,95,0.85) 0%, rgba(15,36,64,0.9) 40%, rgba(5,150,105,0.8) 100%), url('../pictures/hero.jpg') center/cover no-repeat; }
.hero-content { position: relative; text-align: center; color: white; padding: var(--space-2xl) 0; animation: heroFadeIn 1s ease-out; }
@keyframes heroFadeIn { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.hero-badge { display: inline-flex; align-items: center; gap: 0.5rem; background: rgba(5,150,105,0.15); border: 1px solid rgba(5,150,105,0.3); color: var(--color-accent); padding: 0.5rem 1.25rem; border-radius: 50px; font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: var(--space-lg); }
.hero-badge svg { width: 14px; height: 14px; }
.hero-date { font-size: 1rem; color: rgba(255,255,255,0.6); font-weight: 600; margin-bottom: var(--space-sm); letter-spacing: 2px; text-transform: uppercase; }
.hero-date strong { color: #A7F3D0; }
.hero-title { font-size: 4.2rem; font-weight: 800; line-height: 1.08; letter-spacing: -0.03em; margin-bottom: var(--space-md); max-width: 800px; margin-left: auto; margin-right: auto; }
.hero-title .accent { color: #6EE7B7; }
.hero-subtitle { font-size: 1.2rem; color: rgba(255,255,255,0.7); max-width: 580px; margin: 0 auto var(--space-xl); line-height: 1.7; }
.hero-actions { display: flex; justify-content: center; gap: var(--space-sm); flex-wrap: wrap; }

/* Countdown */
.countdown { display: flex; justify-content: center; gap: var(--space-md); margin-bottom: var(--space-xl); }
.countdown-item { text-align: center; }
.countdown-value { display: flex; align-items: center; justify-content: center; width: 82px; height: 82px; background: rgba(255,255,255,0.07); backdrop-filter: blur(16px); border: 1px solid rgba(5,150,105,0.25); border-radius: var(--radius-xl); font-size: 2.2rem; font-weight: 800; color: white; margin-bottom: 0.375rem; transition: var(--transition); }
.countdown-value.flip { animation: countFlip 0.4s ease; }
@keyframes countFlip { 0% { transform: scale(1); } 50% { transform: scale(1.1); background: rgba(5,150,105,0.15); } 100% { transform: scale(1); } }
.countdown-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,0.5); font-weight: 500; }

/* Stats */
.stats-section { background: var(--color-primary); padding: var(--space-xl) 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }
.stat-item { text-align: center; }
.stat-value { font-size: 3.2rem; font-weight: 800; color: var(--color-accent); line-height: 1; margin-bottom: 0.5rem; }
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.6); }

/* About */
.about { background: var(--color-bg); }
.about-content { max-width: 800px; margin: 0 auto; }
.about-content > p { color: var(--color-text-light); margin-bottom: var(--space-sm); font-size: 1.05rem; }
.about-highlights { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-sm); margin-top: var(--space-lg); }
.about-highlight { display: flex; align-items: flex-start; gap: 0.75rem; }
.about-highlight-icon { flex-shrink: 0; width: 36px; height: 36px; background: var(--color-accent-light); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; }
.about-highlight-icon svg { width: 18px; height: 18px; color: var(--color-accent); }
.about-highlight h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 2px; }
.about-highlight p { font-size: 0.8rem; color: var(--color-text-light); margin: 0; }

/* Speakers */
.speakers { background: var(--color-bg-alt); }
.speakers-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.speaker-card { background: var(--color-bg); border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--color-border); transition: var(--transition); }
.speaker-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.speaker-photo { width: 100%; height: 200px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.speaker-photo img { width: 100%; height: 100%; object-fit: cover; }
.speaker-photo .speaker-initials { font-size: 3.5rem; font-weight: 800; color: white; opacity: 0.85; }
.speaker-body { padding: var(--space-md); text-align: center; }
.speaker-name { font-size: 1.15rem; font-weight: 800; color: var(--color-primary); margin-bottom: 4px; }
.speaker-role { font-size: 0.85rem; color: var(--color-text-light); margin-bottom: 2px; }
.speaker-company { font-size: 0.78rem; color: var(--color-text-muted); margin-bottom: var(--space-sm); }
.speaker-topic { display: inline-block; padding: 6px 16px; background: var(--color-bg-alt); border-radius: 50px; font-size: 0.76rem; font-weight: 700; color: var(--color-accent); border: 1px solid var(--color-border); }

/* Agenda */
.agenda { background: var(--color-bg); }
.agenda-timeline { max-width: 700px; margin: 0 auto; position: relative; }
.agenda-timeline::before { content: ''; position: absolute; left: 24px; top: 0; bottom: 0; width: 2px; background: linear-gradient(180deg, var(--color-primary-light), var(--color-accent)); opacity: 0.3; }
.agenda-item { display: flex; gap: var(--space-md); margin-bottom: var(--space-md); position: relative; }
.agenda-dot { flex-shrink: 0; width: 50px; height: 50px; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; position: relative; z-index: 1; background: var(--color-text-muted); }
.agenda-dot.dot--talk { background: var(--color-primary-light); }
.agenda-dot.dot--workshop { background: var(--color-accent); }
.agenda-dot.dot--break { background: var(--color-text-muted); }
.agenda-card { flex: 1; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-sm) var(--space-md); transition: var(--transition); }
.agenda-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow); }
.agenda-time { font-size: 0.8rem; font-weight: 700; color: var(--color-accent); }
.agenda-title { font-size: 1.05rem; font-weight: 600; color: var(--color-primary); margin: 2px 0; }
.agenda-speaker { font-size: 0.85rem; color: var(--color-text-light); }

/* Tickets */
.tickets { background: var(--color-bg-alt); }
.tickets-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); max-width: 700px; margin: 0 auto; }
.ticket-card { background: var(--color-bg); border-radius: var(--radius-xl); padding: var(--space-lg); border: 2px solid var(--color-border); transition: var(--transition); position: relative; }
.ticket-card:hover { border-color: var(--color-primary-light); box-shadow: var(--shadow-lg); }
.ticket-card--featured { border-color: var(--color-accent); box-shadow: 0 8px 30px rgba(5,150,105,0.2); transform: scale(1.04); }
.ticket-card--featured:hover { transform: scale(1.06); }
.ticket-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--color-accent); color: white; padding: 4px 16px; border-radius: 50px; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; white-space: nowrap; }
.ticket-name { font-size: 1.4rem; font-weight: 800; color: var(--color-primary); text-align: center; margin-bottom: 0.25rem; }
.ticket-price { text-align: center; font-size: 2.4rem; font-weight: 800; color: var(--color-accent); margin-bottom: var(--space-md); }
.ticket-features { list-style: none; margin-bottom: var(--space-lg); }
.ticket-features li { padding: 0.5rem 0; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; color: var(--color-text-light); display: flex; align-items: center; gap: 0.5rem; }
.ticket-features li:last-child { border-bottom: none; }
.ticket-features li::before { content: ''; flex-shrink: 0; width: 18px; height: 18px; background: var(--color-accent-light); border-radius: var(--radius-full); background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='%23059669' stroke-width='3' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E"); background-size: 12px; background-position: center; background-repeat: no-repeat; }

/* Location */
.location { background: var(--color-bg); }
.location-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); align-items: start; }
.location-info h3 { font-size: 1.3rem; font-weight: 700; color: var(--color-primary); margin-bottom: var(--space-xs); }
.location-info .location-address { color: var(--color-text-light); margin-bottom: var(--space-md); }
.location-features { list-style: none; margin-bottom: var(--space-lg); }
.location-features li { display: flex; align-items: center; gap: 0.75rem; padding: 0.5rem 0; font-size: 0.9rem; color: var(--color-text-light); }
.location-features li svg { width: 18px; height: 18px; color: var(--color-accent); flex-shrink: 0; }
.map-container { width: 100%; height: 380px; border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--color-border); }
.map-container iframe { width: 100%; height: 100%; border: none; }

/* Register */
.register { background: var(--color-bg-alt); }
.register-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); align-items: start; }
.register-info h3 { font-size: 1.5rem; font-weight: 700; color: var(--color-primary); margin-bottom: var(--space-sm); }
.register-info p { color: var(--color-text-light); margin-bottom: var(--space-sm); }
.register-reminder { display: flex; align-items: flex-start; gap: var(--space-sm); background: var(--color-accent-light); padding: var(--space-md); border-radius: var(--radius-lg); margin-top: var(--space-md); border-left: 3px solid var(--color-accent); }
.register-reminder svg { width: 20px; height: 20px; flex-shrink: 0; color: var(--color-accent); margin-top: 2px; }
.register-reminder p { font-size: 0.85rem; color: var(--color-text); margin: 0; }
.form-wrapper { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-lg); }
.register-form .form-group { margin-bottom: var(--space-md); }
.register-form label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--color-text); margin-bottom: 6px; }
.register-form input, .register-form select, .register-form textarea { width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--color-border); border-radius: var(--radius); font-family: var(--font-body); font-size: 0.95rem; color: var(--color-text); background: var(--color-bg); transition: var(--transition); }
.register-form input:focus, .register-form select:focus, .register-form textarea:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(5,150,105,0.15); }
.register-form textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-sm); }
.form-message { padding: var(--space-sm); border-radius: var(--radius); margin-top: var(--space-sm); font-size: 0.9rem; font-weight: 500; text-align: center; }
.form-message--success { background: #ECFDF5; color: var(--color-success); border: 1px solid #A7F3D0; }

/* Footer */
.footer { background: var(--color-bg-dark); color: var(--color-text-white); padding: var(--space-xl) 0; text-align: center; }
.footer-quote { font-style: italic; font-size: 1.15rem; opacity: 0.85; margin-bottom: var(--space-md); }
.footer-organizer { font-size: 0.9rem; opacity: 0.7; margin-bottom: var(--space-xs); }
.footer-copy { font-size: 0.8rem; opacity: 0.5; }
.footer-powered { margin-top: 1.5rem; font-size: 1.1rem; opacity: 0.7; transition: opacity 0.3s ease; }
.footer-powered:hover { opacity: 1; }
.footer-powered a { color: inherit; display: inline-flex; align-items: center; gap: 0.5rem; }
.powered-icon { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; background: #4F46E5; color: white; border-radius: 6px; font-weight: 800; font-size: 0.75rem; }

/* Animations */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 1024px) {
  .hero-title { font-size: 3rem; }
  .speakers-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-grid { grid-template-columns: repeat(4, 1fr); gap: var(--space-md); }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links { position: fixed; top: 0; right: -100%; width: 75%; max-width: 320px; height: 100vh; background: var(--color-primary); flex-direction: column; justify-content: center; gap: 1.5rem; padding: 2rem; box-shadow: -4px 0 20px rgba(0,0,0,0.3); transition: right var(--transition); }
  .nav-links.open { right: 0; }
  .nav-links a { color: rgba(255,255,255,0.8) !important; font-size: 1.1rem; }
  .hero-title { font-size: 2.4rem; }
  .countdown { gap: var(--space-sm); }
  .countdown-value { width: 60px; height: 60px; font-size: 1.5rem; }
  .section-title { font-size: 2rem; }
  .about-highlights, .location-grid, .register-grid { grid-template-columns: 1fr; }
  .speakers-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
  .tickets-grid { grid-template-columns: 1fr; max-width: 400px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .section { padding: var(--space-xl) 0; }
  .hero-title { font-size: 2rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .countdown { flex-wrap: wrap; }
  .countdown-value { width: 52px; height: 52px; font-size: 1.3rem; }
  .speakers-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
}