/* ============================================
   WATER WORLD - Neon Pipe Theme
   ============================================ */

:root {
  --bg-deep: #060a1a;
  --bg-main: #0a0e27;
  --bg-card: #0d1233;
  --bg-card-hover: #111840;
  --neon-cyan: #00d4ff;
  --neon-blue: #00bcd4;
  --neon-soft: #4fc3f7;
  --pipe-gray: #1a2050;
  --pipe-highlight: #252d5a;
  --text-primary: #e0e6f0;
  --text-secondary: #7a86a8;
  --glow-spread: 0 0 7px var(--neon-cyan), 0 0 20px rgba(0, 212, 255, 0.4), 0 0 40px rgba(0, 212, 255, 0.15);
}

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

body {
  font-family: 'Rajdhani', sans-serif;
  background-color: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;

  /* Blueprint grid background */
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.025) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

/* ---- Header ---- */
#header {
  text-align: center;
  margin-bottom: 0.5rem;
}

.site-title {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2.2rem, 9vw, 3.5rem);
  font-weight: 900;
  color: var(--neon-cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-shadow:
    0 0 7px var(--neon-cyan),
    0 0 20px var(--neon-cyan),
    0 0 40px rgba(0, 119, 170, 0.6),
    0 0 80px rgba(0, 119, 170, 0.3);
  animation: flicker 5s infinite alternate;
  margin: 1rem 0 0.3rem;
}

.site-subtitle {
  font-family: 'Rajdhani', sans-serif;
  font-size: clamp(0.95rem, 3.5vw, 1.15rem);
  font-weight: 600;
  color: var(--neon-soft);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.event-details {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin-bottom: 0.5rem;
}

.event-detail {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.event-detail .detail-icon {
  margin-right: 6px;
  color: var(--neon-cyan);
  opacity: 0.7;
}

/* Pipe decorations */
.pipe-top {
  height: 3px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--pipe-gray) 10%,
    var(--neon-cyan) 30%,
    var(--neon-cyan) 70%,
    var(--pipe-gray) 90%,
    transparent 100%
  );
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.3);
  margin: 0.8rem 2rem;
}

/* ---- Water flow line ---- */
.water-line {
  height: 2px;
  margin: 1.5rem 0;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
  background-size: 200% 100%;
  animation: waterflow 3s linear infinite;
  opacity: 0.5;
}

@keyframes waterflow {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ---- Neon flicker ---- */
@keyframes flicker {
  0%, 92%, 100% { opacity: 1; }
  93% { opacity: 0.88; }
  95% { opacity: 1; }
  96% { opacity: 0.92; }
}

/* ---- Category Sections ---- */
.category-section {
  margin-bottom: 2rem;
}

.category-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(0.75rem, 2.8vw, 0.9rem);
  font-weight: 700;
  color: var(--neon-cyan);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
  text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

.category-icon {
  font-size: 1.2rem;
}

.category-title-text {
  white-space: nowrap;
}

.category-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--neon-cyan), transparent);
  box-shadow: 0 0 4px rgba(0, 212, 255, 0.2);
  opacity: 0.5;
}

/* ---- Link Buttons ---- */
.category-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.link-button {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 14px 18px;
  min-height: 58px;
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(17, 24, 64, 0.8) 100%);
  border: 1px solid var(--pipe-gray);
  border-radius: 10px;
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

/* Left glow bar */
.link-button::before {
  content: '';
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 0;
  width: 3px;
  background: var(--neon-cyan);
  border-radius: 0 2px 2px 0;
  box-shadow: 0 0 6px var(--neon-cyan), 0 0 15px rgba(0, 212, 255, 0.3);
  opacity: 0.6;
  transition: opacity 0.3s, box-shadow 0.3s;
}

.link-button:hover {
  border-color: rgba(0, 212, 255, 0.4);
  background: linear-gradient(135deg, var(--bg-card-hover) 0%, rgba(17, 24, 64, 0.95) 100%);
  box-shadow:
    0 0 15px rgba(0, 212, 255, 0.1),
    inset 0 0 15px rgba(0, 212, 255, 0.03);
  transform: translateY(-2px);
}

.link-button:hover::before {
  opacity: 1;
  box-shadow: 0 0 8px var(--neon-cyan), 0 0 20px rgba(0, 212, 255, 0.5);
}

.link-button:active {
  transform: translateY(0);
}

.link-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  width: 32px;
  text-align: center;
}

.link-text {
  flex: 1;
  min-width: 0;
}

.link-name {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

.link-desc {
  display: block;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.3;
  margin-top: 2px;
}

.link-arrow {
  flex-shrink: 0;
  font-size: 1rem;
  color: var(--text-secondary);
  transition: color 0.3s, transform 0.3s;
}

.link-button:hover .link-arrow {
  color: var(--neon-cyan);
  transform: translateX(3px);
}

/* ---- Loading State ---- */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 3rem 0;
  color: var(--text-secondary);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--pipe-gray);
  border-top-color: var(--neon-cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading.hidden {
  display: none;
}

/* ---- Footer ---- */
.footer {
  text-align: center;
  padding-top: 0.5rem;
}

.footer-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

/* ---- Error State ---- */
.error-message {
  text-align: center;
  padding: 3rem 1rem;
  color: #ff6b6b;
  font-size: 1rem;
}

/* ---- Fade-in animation for links ---- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.category-section {
  animation: fadeInUp 0.4s ease forwards;
  opacity: 0;
}

.category-section:nth-child(1) { animation-delay: 0.1s; }
.category-section:nth-child(2) { animation-delay: 0.25s; }
.category-section:nth-child(3) { animation-delay: 0.4s; }
.category-section:nth-child(4) { animation-delay: 0.55s; }
.category-section:nth-child(5) { animation-delay: 0.7s; }

/* ---- Sponsors Section ---- */
#sponsors-container {
  margin-top: 1rem;
  opacity: 0;
  animation: fadeInUp 0.4s ease forwards;
  animation-delay: 0.8s;
}

#sponsors-container.visible {
  /* animation handles visibility */
}

.sponsors-title {
  margin-bottom: 1.2rem;
}

.sponsors-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.sponsor-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px 14px;
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(17, 24, 64, 0.8) 100%);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
  min-height: 120px;
}

.sponsor-item:hover {
  border-color: rgba(0, 212, 255, 0.4);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.15), 0 0 40px rgba(0, 212, 255, 0.05);
  transform: translateY(-3px);
}

.sponsor-logo {
  max-width: 90%;
  max-height: 80px;
  object-fit: contain;
  filter: brightness(1) contrast(1.1);
  transition: all 0.3s;
}

.sponsor-item:hover .sponsor-logo {
  filter: brightness(1.2) contrast(1.1);
  transform: scale(1.05);
}

.sponsor-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.2;
}

.sponsor-fallback {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--neon-soft);
  text-align: center;
  padding: 10px;
  letter-spacing: 0.05em;
  text-shadow: 0 0 8px rgba(0, 212, 255, 0.3);
}

/* ---- Past Events (footer) ---- */
.past-events-heading {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.past-events-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 1rem;
}

.past-event-link {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--neon-soft);
  text-decoration: none;
  padding: 4px 12px;
  border: 1px solid var(--pipe-gray);
  border-radius: 20px;
  transition: all 0.3s ease;
}

.past-event-link:hover {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.2);
}

/* ---- Responsive ---- */
@media (min-width: 600px) {
  .container {
    max-width: 540px;
    padding: 2.5rem 1.5rem 3rem;
  }

  .link-button {
    padding: 16px 22px;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 600px;
    padding: 3rem 2rem 4rem;
  }
}