/* ==============================================
   Virtual SDG INNO 2026 — Main Stylesheet
   Style: Vibrant & Energetic
   ============================================== */

/* -----------------------------------------------
   CSS Variables / Design Tokens
   ----------------------------------------------- */
:root {
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Open Sans', sans-serif;

  /* SDG-inspired palette */
  --color-primary:    #0077B6;   /* deep blue */
  --color-secondary:  #00B4D8;   /* teal */
  --color-accent:     #F77F00;   /* orange */
  --color-green:      #2DC653;   /* SDG green */
  --color-purple:     #7B2FBE;   /* SDG purple */
  --color-red:        #E63946;

  /* Gradients */
  --gradient-hero:    linear-gradient(135deg, #020024 0%, #0077B6 50%, #00B4D8 100%);
  --gradient-section: linear-gradient(135deg, #0d0d2b 0%, #1a1a4e 100%);
  --gradient-card:    linear-gradient(145deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));

  /* Neutrals */
  --color-dark:  #0d0d2b;
  --color-light: #f0f4f8;
  --color-white: #ffffff;
  --color-muted: #94a3b8;

  --border-radius: 1rem;
  --transition: 0.3s ease;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

/* -----------------------------------------------
   Base
   ----------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--color-dark);
  color: var(--color-light);
  overflow-x: hidden;
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
}

a { color: var(--color-secondary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }

img { max-width: 100%; height: auto; }

.section-padding { padding: 100px 0; }

/* -----------------------------------------------
   Utility Highlights
   ----------------------------------------------- */
.highlight { color: var(--color-secondary); }

/* -----------------------------------------------
   NAVBAR
   ----------------------------------------------- */
#navbar {
  background: transparent;
  padding: 1.25rem 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
  z-index: 1050;
}

#navbar.scrolled {
  background: rgba(13, 13, 43, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
  padding: 0.75rem 0;
}

.navbar-brand {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--color-white) !important;
  letter-spacing: 1px;
}

.brand-sdg  { color: var(--color-secondary); }
.brand-inno { color: var(--color-white); }
.brand-year { color: var(--color-accent); font-size: 0.9em; }

.navbar-nav .nav-link {
  color: rgba(255,255,255,0.85) !important;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.5rem 0.85rem;
  transition: color var(--transition);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active { color: var(--color-secondary) !important; }

.navbar-toggler {
  border: none;
  color: var(--color-white);
  font-size: 1.2rem;
}
.navbar-toggler:focus { box-shadow: none; }

/* Register button in nav */
.btn-register {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white) !important;
  border-radius: 50px;
  padding: 0.45rem 1.25rem !important;
  font-weight: 600 !important;
  font-size: 0.85rem !important;
  transition: opacity var(--transition), transform var(--transition);
}
.btn-register:hover { opacity: 0.85; transform: translateY(-1px); }

/* -----------------------------------------------
   HERO SECTION
   ----------------------------------------------- */
.hero-section {
  position: relative;
  min-height: 100vh;
  background: var(--gradient-hero);
  overflow: hidden;
}

/* Animated gradient background orbs */
.hero-section::before,
.hero-section::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: floatOrb 8s ease-in-out infinite alternate;
}

.hero-section::before {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #00B4D8, transparent 70%);
  top: -150px; left: -150px;
}

.hero-section::after {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #F77F00, transparent 70%);
  bottom: -100px; right: -100px;
  animation-delay: 2s;
}

@keyframes floatOrb {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, 30px) scale(1.1); }
}

.hero-overlay {
  position: absolute; inset: 0;
  background: rgba(13, 13, 43, 0.45);
  z-index: 1;
}

.hero-section .container { z-index: 2; padding-top: 100px; }

.hero-edition-badge {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 0.35rem 1rem;
  border-radius: 50px;
  margin-bottom: 1.25rem;
  backdrop-filter: blur(6px);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800;
  color: var(--color-white);
  text-shadow: 0 4px 20px rgba(0,0,0,0.4);
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.hero-theme {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: rgba(255,255,255,0.85);
  font-style: italic;
  margin-bottom: 0.5rem;
}

.hero-organiser {
  font-size: 0.95rem;
  color: var(--color-secondary);
  letter-spacing: 1px;
  margin-bottom: 2.5rem;
}

/* Countdown */
.countdown-wrapper {
  margin: 2rem auto;
  max-width: 600px;
}

.countdown-label {
  font-size: 0.85rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.countdown {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.countdown-block {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: 1rem 1.5rem;
  min-width: 90px;
  text-align: center;
}

.countdown-block span {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1;
}

.countdown-block small {
  font-size: 0.7rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-secondary);
}

.countdown-separator {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-secondary);
  align-self: flex-start;
  padding-top: 0.75rem;
}

/* Hero CTA */
.hero-cta { margin-top: 2.5rem; display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

.btn-hero-primary {
  background: linear-gradient(135deg, var(--color-accent), #D62828);
  color: var(--color-white);
  border: none;
  padding: 0.85rem 2rem;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(247, 127, 0, 0.4);
}
.btn-hero-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(247, 127, 0, 0.5); color: var(--color-white); }

.btn-hero-secondary {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255,255,255,0.4);
  padding: 0.85rem 2rem;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
}
.btn-hero-secondary:hover { background: rgba(255,255,255,0.1); border-color: var(--color-white); color: var(--color-white); transform: translateY(-3px); }

/* -----------------------------------------------
   SECTION HEADERS (shared)
   ----------------------------------------------- */
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-secondary);
  background: rgba(0, 180, 216, 0.12);
  border: 1px solid rgba(0, 180, 216, 0.25);
  padding: 0.3rem 1rem;
  border-radius: 50px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  color: var(--color-muted);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

/* -----------------------------------------------
   SECTION 2 — ABOUT
   ----------------------------------------------- */
.section-about { background: var(--gradient-section); }

.about-text {
  color: rgba(255,255,255,0.82);
  margin-bottom: 1.25rem;
  font-size: 1rem;
}

.stat-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  text-align: center;
  transition: transform var(--transition), border-color var(--transition);
}
.stat-card:hover { transform: translateY(-4px); border-color: var(--color-secondary); }

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-secondary);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.sdg-wheel-img {
  max-width: 380px;
  filter: drop-shadow(0 8px 30px rgba(0, 180, 216, 0.4));
  animation: floatImage 4s ease-in-out infinite alternate;
}

@keyframes floatImage {
  from { transform: translateY(0); }
  to   { transform: translateY(-15px); }
}

/* -----------------------------------------------
   SECTION 3 — CATEGORIES
   ----------------------------------------------- */
.section-categories { background: var(--color-dark); }

.category-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--border-radius);
  padding: 2rem 1.75rem;
  height: 100%;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.category-card--1::before { background: linear-gradient(90deg, #E63946, #F77F00); }
.category-card--2::before { background: linear-gradient(90deg, #2DC653, #00B4D8); }
.category-card--3::before { background: linear-gradient(90deg, #F77F00, #FFD166); }
.category-card--4::before { background: linear-gradient(90deg, #0077B6, #00B4D8); }
.category-card--5::before { background: linear-gradient(90deg, #7B2FBE, #0077B6); }

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow);
}

.category-card--1:hover { border-color: #E63946; }
.category-card--2:hover { border-color: #2DC653; }
.category-card--3:hover { border-color: #F77F00; }
.category-card--4:hover { border-color: #00B4D8; }
.category-card--5:hover { border-color: #7B2FBE; }

.category-card-sdg-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }

.sdg-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  background: rgba(255,255,255,0.08);
  color: var(--color-secondary);
  border: 1px solid rgba(0, 180, 216, 0.25);
}

.category-card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--color-secondary);
}

.category-card--1 .category-card-icon { color: #E63946; }
.category-card--2 .category-card-icon { color: #2DC653; }
.category-card--3 .category-card-icon { color: #F77F00; }
.category-card--4 .category-card-icon { color: #00B4D8; }
.category-card--5 .category-card-icon { color: #7B2FBE; }

.category-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.category-card-desc {
  font-size: 0.88rem;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* -----------------------------------------------
   SECTION 4 — TIMELINE
   ----------------------------------------------- */
.section-timeline { background: var(--gradient-section); }

.timeline { position: relative; max-width: 800px; margin: 0 auto; }

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-secondary), transparent);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  justify-content: flex-end;
  padding-right: calc(50% + 2.5rem);
  position: relative;
  margin-bottom: 3rem;
}

.timeline-item:nth-child(even) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: calc(50% + 2.5rem);
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 1rem;
  transform: translateX(-50%);
  width: 14px; height: 14px;
  background: var(--color-secondary);
  border-radius: 50%;
  border: 3px solid var(--color-dark);
  box-shadow: 0 0 0 3px var(--color-secondary);
  z-index: 1;
}

.timeline-dot--highlight { background: var(--color-accent); box-shadow: 0 0 0 3px var(--color-accent); }
.timeline-dot--winner    { background: #FFD166; box-shadow: 0 0 0 3px #FFD166; }

.timeline-content {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--border-radius);
  padding: 1.25rem 1.5rem;
  max-width: 320px;
  width: 100%;
  transition: border-color var(--transition);
}

.timeline-item--highlight .timeline-content { border-color: rgba(247, 127, 0, 0.3); }
.timeline-content:hover { border-color: var(--color-secondary); }

.timeline-date {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-secondary);
  display: block;
  margin-bottom: 0.4rem;
}

.timeline-item--highlight .timeline-date { color: var(--color-accent); }

.timeline-event {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.4rem;
}

.timeline-desc { font-size: 0.85rem; color: var(--color-muted); margin-bottom: 0; }

.badge-deadline {
  font-size: 0.65rem;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 0.2rem 0.5rem;
  border-radius: 50px;
  vertical-align: middle;
  font-family: var(--font-heading);
  font-weight: 700;
}

/* Responsive timeline */
@media (max-width: 767px) {
  .timeline::before { left: 1rem; }
  .timeline-item,
  .timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-left: 3.5rem;
    padding-right: 0;
  }
  .timeline-dot { left: 1rem; }
  .timeline-content { max-width: 100%; }
}

/* -----------------------------------------------
   SECTION 5 — FEES
   ----------------------------------------------- */
.section-fees { background: var(--color-dark); }

.fees-table-wrapper {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.fees-table {
  margin-bottom: 0;
  color: var(--color-light);
}

.fees-table thead tr {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.fees-table thead th {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-white);
  padding: 1rem 1.25rem;
  border: none;
}

.fees-table tbody tr {
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: background var(--transition);
}
.fees-table tbody tr:hover { background: rgba(255,255,255,0.04); }
.fees-table tbody tr:last-child { border-bottom: none; }

.fees-table td {
  padding: 0.85rem 1.25rem;
  vertical-align: middle;
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  border: none;
  background: transparent;
}

.fee-amount {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-secondary);
  font-size: 0.95rem;
}
.fee-free { color: var(--color-green); }

.slot-badge {
  display: inline-block;
  background: rgba(0, 180, 216, 0.15);
  color: var(--color-secondary);
  border: 1px solid rgba(0, 180, 216, 0.3);
  padding: 0.2rem 0.75rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
}
.slot-badge--tba { background: rgba(255,255,255,0.05); color: var(--color-muted); border-color: rgba(255,255,255,0.1); }

/* Register CTA Card */
.register-cta-card {
  background: linear-gradient(135deg, rgba(0,119,182,0.15), rgba(0,180,216,0.1));
  border: 1px solid rgba(0, 180, 216, 0.2);
  border-radius: var(--border-radius);
  padding: 2rem;
  height: 100%;
}

.register-cta-card h3 {
  font-size: 1.5rem;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.register-cta-card p { color: var(--color-muted); font-size: 0.9rem; }

.btn-register-main {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  border: none;
  padding: 0.85rem;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  transition: opacity var(--transition), transform var(--transition);
  box-shadow: 0 4px 20px rgba(0, 119, 182, 0.4);
}
.btn-register-main:hover { opacity: 0.85; transform: translateY(-2px); color: var(--color-white); }

.register-cta-card hr { border-color: rgba(255,255,255,0.1); }

.download-title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

.download-list { list-style: none; padding: 0; margin: 0; }
.download-list li { margin-bottom: 0.6rem; }
.download-list a {
  display: flex;
  align-items: center;
  color: var(--color-light);
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}
.download-list a:hover { background: rgba(0, 180, 216, 0.1); border-color: var(--color-secondary); color: var(--color-secondary); }

/* -----------------------------------------------
   SECTION 6 — COMMITTEE
   ----------------------------------------------- */
.section-committee { background: var(--gradient-section); }

.person-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--border-radius);
  padding: 2rem 1.25rem;
  text-align: center;
  transition: transform var(--transition), border-color var(--transition);
}
.person-card:hover { transform: translateY(-6px); border-color: var(--color-secondary); }

.person-avatar {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.75rem;
  color: var(--color-white);
  margin: 0 auto 1rem;
}

.person-name { font-size: 0.95rem; font-weight: 700; color: var(--color-white); margin-bottom: 0.25rem; }
.person-role { font-size: 0.8rem; color: var(--color-muted); margin-bottom: 0; }

/* -----------------------------------------------
   SECTION 7 — CONTACT
   ----------------------------------------------- */
.section-contact { background: var(--color-dark); }

.contact-form .form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
  letter-spacing: 0.5px;
}

.contact-form .form-control {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 0.6rem;
  color: var(--color-white);
  padding: 0.85rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.contact-form .form-control:focus {
  background: rgba(255,255,255,0.07);
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.15);
  color: var(--color-white);
}
.contact-form .form-control::placeholder { color: rgba(255,255,255,0.25); }

.btn-contact-submit {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  border: none;
  padding: 0.85rem 2rem;
  border-radius: 50px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  transition: opacity var(--transition), transform var(--transition);
  box-shadow: 0 4px 20px rgba(0, 119, 182, 0.3);
}
.btn-contact-submit:hover { opacity: 0.85; transform: translateY(-2px); color: var(--color-white); }

.contact-info-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--border-radius);
  padding: 2rem;
  height: 100%;
}
.contact-info-card h4 { color: var(--color-white); font-size: 1.25rem; margin-bottom: 1.5rem; }

.contact-info-list { list-style: none; padding: 0; margin: 0; }
.contact-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
}
.contact-info-list li i {
  color: var(--color-secondary);
  font-size: 1rem;
  width: 20px;
  flex-shrink: 0;
  margin-top: 3px;
}

.social-links { display: flex; gap: 0.75rem; }
.social-links a {
  display: flex; align-items: center; justify-content: center;
  width: 42px; height: 42px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--color-light);
  font-size: 1rem;
  transition: all var(--transition);
}
.social-links a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-3px);
}

/* -----------------------------------------------
   FOOTER
   ----------------------------------------------- */
.site-footer {
  background: rgba(0,0,0,0.4);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 2.5rem 0;
}

.footer-text { color: var(--color-muted); font-size: 0.9rem; margin-bottom: 0.4rem; }
.footer-theme { font-size: 0.8rem; color: rgba(255,255,255,0.3); font-style: italic; margin-bottom: 0; }

/* -----------------------------------------------
   BACK TO TOP BUTTON
   ----------------------------------------------- */
#backToTop {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  border: none;
  font-size: 1rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(0, 119, 182, 0.5);
  transition: transform var(--transition), opacity var(--transition);
  z-index: 999;
}
#backToTop:hover { transform: translateY(-3px); }
#backToTop.visible { display: flex; }

/* -----------------------------------------------
   RESPONSIVE ADJUSTMENTS
   ----------------------------------------------- */
@media (max-width: 991px) {
  .section-padding { padding: 70px 0; }
  .navbar-collapse {
    background: rgba(13, 13, 43, 0.97);
    backdrop-filter: blur(12px);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-top: 0.5rem;
  }
}

@media (max-width: 575px) {
  .countdown-block { min-width: 70px; padding: 0.75rem 1rem; }
  .hero-cta { flex-direction: column; align-items: center; }
  .btn-hero-primary, .btn-hero-secondary { width: 100%; max-width: 280px; }
}

/* -----------------------------------------------
   ABOUT — Event Poster Frame
   ----------------------------------------------- */
.event-poster-frame {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255,255,255,0.08);
  transition: transform var(--transition), box-shadow var(--transition);
}
.event-poster-frame:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: 0 30px 80px rgba(0, 119, 182, 0.4), 0 0 0 1px rgba(0,180,216,0.2);
}
.event-poster-img { display: block; width: 100%; border-radius: var(--border-radius); }

/* -----------------------------------------------
   SECTION 6 — PRIZES & AWARDS
   ----------------------------------------------- */
.section-prizes { background: var(--gradient-section); }

.prizes-col-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: 1rem;
}

.prize-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.08);
  border-left: 4px solid transparent;
  border-radius: var(--border-radius);
  padding: 1.1rem 1.25rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform var(--transition), border-color var(--transition);
}
.prize-card:hover { transform: translateX(4px); }
.prize-card:last-child { margin-bottom: 0; }

.prize-card--platinum { border-left-color: #E5C66B; }
.prize-card--young    { border-left-color: #00B4D8; }
.prize-card--junior   { border-left-color: #2DC653; }
.prize-card--gold     { border-left-color: #FFD700; }
.prize-card--silver   { border-left-color: #C0C0C0; }
.prize-card--bronze   { border-left-color: #CD7F32; }

.prize-icon {
  font-size: 1.4rem;
  width: 40px;
  flex-shrink: 0;
  text-align: center;
}
.prize-card--platinum .prize-icon { color: #E5C66B; }
.prize-card--young    .prize-icon { color: #00B4D8; }
.prize-card--junior   .prize-icon { color: #2DC653; }
.prize-card--gold     .prize-icon { color: #FFD700; }
.prize-card--silver   .prize-icon { color: #C0C0C0; }
.prize-card--bronze   .prize-icon { color: #CD7F32; }

.prize-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.15rem;
}
.prize-reward { font-size: 0.78rem; color: var(--color-muted); margin-bottom: 0; }
.prize-cash { color: var(--color-green); font-weight: 700; }

.prizes-poster-frame {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255,255,255,0.08);
  transition: transform var(--transition);
}
.prizes-poster-frame:hover { transform: translateY(-6px); }
.prizes-poster-img { display: block; width: 100%; border-radius: var(--border-radius); }

.isbn-note {
  background: linear-gradient(135deg, rgba(0,119,182,0.1), rgba(0,180,216,0.08));
  border: 1px solid rgba(0, 180, 216, 0.2);
  border-radius: var(--border-radius);
  padding: 1.25rem 1.75rem;
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  text-align: center;
}
.isbn-note i { color: var(--color-secondary); }

/* -----------------------------------------------
   FEES — Payment Methods Card
   ----------------------------------------------- */
.payment-methods-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 0.75rem;
  padding: 1.25rem;
}

.payment-info-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
}
.payment-info-list li {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.82rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.75);
}
.payment-info-list li:last-child { border-bottom: none; }
.payment-info-list li span {
  color: var(--color-muted);
  min-width: 90px;
  flex-shrink: 0;
}
.payment-info-list li strong { color: var(--color-white); text-align: right; word-break: break-all; }