/* ============================================================
   LỄ HỘI BIA HÀ NỘI 2026 - BRANDING & UI DESIGN SYSTEM
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,700;1,600&display=swap');

:root {
  --primary-red: #E30613;
  --primary-red-hover: #C0040F;
  --gold-amber: #FFB800;
  --gold-glow: #FFA000;
  --bg-dark: #0B0C10;
  --bg-card: rgba(22, 24, 33, 0.75);
  --bg-glass: rgba(255, 255, 255, 0.05);
  --border-glass: rgba(255, 184, 0, 0.25);
  --text-light: #F1F5F9;
  --text-muted: #94A3B8;
  --fb-blue: #1877F2;
  --fb-blue-hover: #166FE5;
  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow-glow: 0 0 25px rgba(227, 6, 19, 0.4);
  --shadow-gold: 0 0 25px rgba(255, 184, 0, 0.35);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-light);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(227, 6, 19, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(255, 184, 0, 0.12) 0%, transparent 45%);
}

/* Hiệu ứng bọt bia trôi nổi phía nền */
.bubbles-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bubble {
  position: absolute;
  bottom: -50px;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.8), rgba(255, 184, 0, 0.3));
  border-radius: 50%;
  animation: floatUp 12s infinite linear;
  box-shadow: 0 0 8px rgba(255, 184, 0, 0.4);
}

@keyframes floatUp {
  0% { transform: translateY(0) scale(0.6); opacity: 0; }
  20% { opacity: 0.8; }
  80% { opacity: 0.8; }
  100% { transform: translateY(-110vh) scale(1.2); opacity: 0; }
}

/* Header & Demo Control Bar */
.demo-bar {
  background: rgba(227, 6, 19, 0.9);
  color: #fff;
  padding: 8px 16px;
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.demo-bar select, .demo-bar button {
  background: #fff;
  color: #000;
  border: none;
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  margin-left: 6px;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 8%;
  position: relative;
  z-index: 10;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary-red), var(--gold-amber));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: var(--shadow-gold);
}

.brand-text h1 {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.brand-text span {
  color: var(--gold-amber);
  font-size: 0.78rem;
  letter-spacing: 2px;
  font-weight: 600;
  display: block;
}

/* Main Container */
.main-wrapper {
  position: relative;
  z-index: 10;
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
}

/* Step Layout & Card */
.step-container {
  display: none;
  animation: fadeIn 0.5s ease forwards;
}

.step-container.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* HERO SECTION - LOGIN STEP */
.hero-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0,0,0,0.6);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,184,0,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.badge-event {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 184, 0, 0.15);
  border: 1px solid var(--gold-amber);
  color: var(--gold-amber);
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-title {
  font-family: 'Playfair Display', serif;
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #FFFFFF 30%, var(--gold-amber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 650px;
  margin: 0 auto 36px auto;
  line-height: 1.6;
}

/* Feature Highlights */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
  text-align: left;
}

.feature-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px;
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: var(--gold-amber);
  background: rgba(255, 184, 0, 0.05);
}

.feature-box i {
  font-size: 1.8rem;
  color: var(--gold-amber);
  margin-bottom: 12px;
}

.feature-box h4 {
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: #fff;
}

.feature-box p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Facebook Login Button */
.btn-fb-login {
  background: linear-gradient(135deg, var(--fb-blue), #0e5fc5);
  color: #ffffff;
  border: none;
  padding: 16px 36px;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 10px 25px rgba(24, 119, 242, 0.4);
  transition: all 0.3s ease;
}

.btn-fb-login:hover {
  transform: scale(1.04);
  box-shadow: 0 12px 30px rgba(24, 119, 242, 0.6);
  background: linear-gradient(135deg, #1980ff, #1169da);
}

.fb-trust-note {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.fb-trust-note i {
  color: #4CAF50;
}

/* FORM STEP CONTAINER */
.form-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 680px;
  margin: 0 auto;
  box-shadow: 0 20px 50px rgba(0,0,0,0.6);
}

.user-preview-header {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(255, 255, 255, 0.04);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--gold-amber);
  margin-bottom: 30px;
}

.user-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--gold-amber);
  object-fit: cover;
}

.user-info h3 {
  font-size: 1.15rem;
  color: #fff;
}

.user-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.form-group {
  margin-bottom: 22px;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-light);
}

.form-group label span.required {
  color: var(--primary-red);
}

.form-control {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  padding: 14px 16px;
  color: #fff;
  font-size: 0.98rem;
  outline: none;
  transition: border-color 0.3s ease;
}

.form-control:focus {
  border-color: var(--gold-amber);
  box-shadow: 0 0 10px rgba(255, 184, 0, 0.2);
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 10px;
}

.checkbox-group input {
  margin-top: 4px;
  accent-color: var(--primary-red);
  width: 18px;
  height: 18px;
}

.btn-primary-action {
  width: 100%;
  background: linear-gradient(135deg, var(--primary-red), #B3000B);
  color: #fff;
  border: none;
  padding: 16px;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-glow);
  transition: all 0.3s ease;
  margin-top: 10px;
}

.btn-primary-action:hover {
  background: linear-gradient(135deg, #FF1A27, var(--primary-red));
  transform: translateY(-2px);
}

/* E-TICKET TICKET CARD */
.ticket-wrapper {
  max-width: 750px;
  margin: 0 auto;
}

.e-ticket {
  background: linear-gradient(135deg, #1C1F2B 0%, #0F1118 100%);
  border: 2px solid var(--gold-amber);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0,0,0,0.8), 0 0 30px rgba(255, 184, 0, 0.25);
  position: relative;
  display: grid;
  grid-template-columns: 2.2fr 1fr;
}

@media (max-width: 768px) {
  .e-ticket { grid-template-columns: 1fr; }
}

.ticket-main {
  padding: 36px;
  border-right: 2px dashed rgba(255, 184, 0, 0.3);
  position: relative;
}

.ticket-main::after, .ticket-main::before {
  content: '';
  position: absolute;
  right: -14px;
  width: 26px;
  height: 26px;
  background: var(--bg-dark);
  border-radius: 50%;
  z-index: 5;
}
.ticket-main::before { top: -13px; }
.ticket-main::after { bottom: -13px; }

.ticket-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.ticket-type-badge {
  background: linear-gradient(135deg, var(--gold-amber), var(--gold-glow));
  color: #000;
  padding: 6px 16px;
  border-radius: 20px;
  font-weight: 800;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.ticket-code {
  font-family: monospace;
  font-weight: 700;
  color: var(--gold-amber);
  font-size: 1.1rem;
}

.ticket-user-name {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
}

.ticket-details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;

}

.ticket-detail-item label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  display: block;
}

.ticket-detail-item p {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}

.beer-perk-box {
  margin-top: 24px;
  background: rgba(255, 184, 0, 0.1);
  border: 1px solid var(--gold-amber);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 12px;
}

.beer-perk-box i {
  font-size: 1.8rem;
  color: var(--gold-amber);
}

.beer-perk-box h5 {
  font-size: 0.95rem;
  color: var(--gold-amber);
}

.beer-perk-box p {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* Ticket Stub & QR Code */
.ticket-stub {
  padding: 30px;
  background: rgba(0,0,0,0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.qr-box {
  background: #fff;
  padding: 12px;
  border-radius: var(--radius-md);
  box-shadow: 0 0 20px rgba(255,255,255,0.2);
  margin-bottom: 14px;
}

.qr-box img, .qr-box canvas {
  width: 140px;
  height: 140px;
  display: block;
}

.qr-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Action Buttons after Issuance */
.ticket-actions {
  display: flex;
  gap: 16px;
  margin-top: 30px;
  justify-content: center;
}

.btn-secondary-action {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 14px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
}

.btn-secondary-action:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #fff;
}

/* Modal Popup giả lập Facebook OAuth */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 999;
  display: none;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active {
  display: flex;
}

.fb-modal-card {
  background: #242526;
  width: 100%;
  max-width: 480px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.9);
  border: 1px solid #393a3b;
  color: #e4e6eb;
}

.fb-modal-header {
  background: #1877F2;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}

.fb-modal-header i { font-size: 1.5rem; }
.fb-modal-header h4 { font-size: 1.1rem; font-weight: 700; }

.fb-modal-body {
  padding: 24px;
}

.fb-app-info {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid #3e4042;
}

.fb-app-logo {
  width: 48px;
  height: 48px;
  background: var(--primary-red);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--gold-amber);
}

.fb-modal-btn {
  width: 100%;
  background: #1877F2;
  color: #fff;
  border: none;
  padding: 12px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  margin-top: 10px;
}

.fb-modal-btn:hover { background: #166FE5; }

/* Alert Box */
.alert-box {
  padding: 14px 18px;
  border-radius: 10px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.alert-danger {
  background: rgba(227, 6, 19, 0.15);
  border: 1px solid var(--primary-red);
  color: #FF6B6B;
}