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

:root {
  --bg: #0b0e1a;
  --surface: #111827;
  --surface2: #1e2a40;
  --text: #ffffff;
  --muted: #a0aec0;
  --accent: #f4c400;
  --navy: #1a2f5e;
  --radius: 18px;
  --max: 1100px;
  --bar-max: 280px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --spring: cubic-bezier(.34, 1.56, .64, 1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ============ NAV ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  transition: padding .4s var(--ease), background .4s var(--ease),
              backdrop-filter .4s var(--ease), border-color .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  padding: 10px 28px;
  background: rgba(11, 14, 26, .72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -.01em;
}
.nav-logo { height: 30px; width: auto; }
.nav-links { display: flex; gap: 26px; }
.nav-links a {
  color: rgba(255,255,255,.75);
  text-decoration: none;
  font-size: .92rem;
  font-weight: 600;
  position: relative;
  transition: color .25s ease;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -5px;
  width: 0; height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width .3s var(--ease);
}
.nav-links a:hover { color: #fff; }
.nav-links a:hover::after { width: 100%; }
@media (max-width: 600px) {
  .nav { justify-content: center; }
  .nav-brand { display: none; }
  .nav-links { gap: 20px; }
  .nav-links a { font-size: .92rem; }
}

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 0%, #14224a 0%, #0b0e1a 60%);
  border-bottom: 1px solid rgba(244,196,0,.15);
}
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .55;
  will-change: transform;
}
.blob-1 {
  width: 480px; height: 480px;
  background: #1a3a8a;
  top: -120px; left: -80px;
  animation: float1 18s ease-in-out infinite;
}
.blob-2 {
  width: 420px; height: 420px;
  background: rgba(244,196,0,.35);
  bottom: -140px; right: -60px;
  animation: float2 22s ease-in-out infinite;
}
.blob-3 {
  width: 360px; height: 360px;
  background: #102a66;
  top: 30%; left: 55%;
  animation: float3 26s ease-in-out infinite;
}
@keyframes float1 {
  0%,100% { transform: translate(0,0) scale(1); }
  50%     { transform: translate(60px,40px) scale(1.1); }
}
@keyframes float2 {
  0%,100% { transform: translate(0,0) scale(1); }
  50%     { transform: translate(-50px,-30px) scale(1.15); }
}
@keyframes float3 {
  0%,100% { transform: translate(0,0) scale(1); }
  50%     { transform: translate(-40px,50px) scale(.9); }
}
.hero-inner { position: relative; z-index: 2; }
.hero-logo-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  flex-wrap: wrap;
}
.hero-logo {
  height: 90px;
  width: auto;
  filter: drop-shadow(0 4px 20px rgba(0,0,0,.5));
  animation: heroPop 1s var(--spring) both;
}
.hero-title {
  font-size: clamp(2.6rem, 8vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -.03em;
  line-height: 1.02;
  background: linear-gradient(180deg, #fff 0%, #f4c400 140%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 60px rgba(244,196,0,.2);
  animation: heroRise 1s var(--ease) .1s both;
}
.hero-sub {
  font-size: clamp(1rem, 3vw, 1.35rem);
  margin-top: 16px;
  color: rgba(255,255,255,.72);
  font-weight: 500;
  animation: heroRise 1s var(--ease) .25s both;
}
.hero-cta {
  display: inline-block;
  margin-top: 36px;
  padding: 15px 34px;
  background: var(--accent);
  color: #000;
  font-weight: 800;
  font-size: 1.02rem;
  border-radius: 100px;
  text-decoration: none;
  box-shadow: 0 8px 30px rgba(244,196,0,.3);
  transition: transform .3s var(--spring), box-shadow .3s var(--ease);
  animation: heroRise 1s var(--ease) .4s both;
}
.hero-cta:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 14px 40px rgba(244,196,0,.45);
}
@media (max-width: 480px) {
  .hero { min-height: 88vh; }
}
@keyframes heroPop {
  from { opacity: 0; transform: scale(.7) rotate(-8deg); }
  to   { opacity: 1; transform: scale(1) rotate(0); }
}
@keyframes heroRise {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============ SCROLL REVEAL ============ */
.reveal {
  opacity: 0;
  transform: translateY(44px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  will-change: opacity, transform;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ============ WELCOME ============ */
.welcome {
  background: linear-gradient(135deg, #14264f 0%, #0e1a38 100%);
  border-bottom: 1px solid rgba(255,255,255,.06);
  padding: 88px 24px;
}
.welcome-inner { max-width: var(--max); margin: 0 auto; }
.welcome h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 20px;
  color: var(--accent);
}
.welcome p {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: rgba(255,255,255,.92);
  line-height: 1.85;
  max-width: 820px;
  font-weight: 400;
}

/* ============ GLASS CARD SHARED ============ */
.poll-inner, .tips-inner, .feedback-inner {
  max-width: 720px;
  margin: 0 auto;
}

/* ============ POLL ============ */
.poll-section {
  background: var(--bg);
  padding: 96px 24px;
}
.poll-tag {
  display: inline-block;
  background: var(--accent);
  color: #000;
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 18px;
}
.poll-question {
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: #fff;
  margin-bottom: 36px;
  line-height: 1.35;
}
.poll-buttons { display: flex; gap: 16px; }
.poll-btn {
  flex: 1;
  padding: 20px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1.15rem;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform .25s var(--spring), box-shadow .25s var(--ease),
              background .25s ease;
}
.poll-btn.yes { background: var(--accent); color: #000; }
.poll-btn.no {
  background: rgba(255,255,255,.05);
  color: #fff;
  border-color: rgba(255,255,255,.14);
  backdrop-filter: blur(10px);
}
.poll-btn:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,.45); }
.poll-btn:active { transform: scale(.96); }
.poll-emoji { font-size: 1.35rem; }

/* RESULTS */
.poll-results { margin-top: 30px; }
.poll-bar-wrap { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.poll-bar-label { width: 34px; font-size: .92rem; font-weight: 700; color: #fff; }
.poll-bar-track {
  flex: 1;
  height: 22px;
  background: rgba(255,255,255,.06);
  border-radius: 100px;
  overflow: hidden;
}
.poll-bar {
  height: 100%;
  border-radius: 100px;
  width: 0;
  transition: width 1.2s var(--ease);
}
.yes-bar { background: linear-gradient(90deg, #d4a800, var(--accent)); }
.no-bar  { background: linear-gradient(90deg, #b02a36, #e63946); }
.poll-bar-pct { min-width: 64px; font-size: .9rem; font-weight: 800; color: #fff; text-align: right; }
.poll-total { font-size: 1rem; font-weight: 700; color: #fff; margin-top: 22px; }
.poll-voted-msg { font-size: .85rem; color: var(--muted); margin-top: 14px; }
.poll-remove-btn {
  margin-top: 14px;
  background: none;
  border: 1px solid rgba(255,255,255,.2);
  color: var(--muted);
  padding: 9px 20px;
  border-radius: 100px;
  font-family: inherit;
  font-size: .85rem;
  cursor: pointer;
  transition: border-color .25s, color .25s, transform .25s var(--spring);
}
.poll-remove-btn:hover { border-color: #e63946; color: #e63946; transform: translateY(-2px); }

/* ============ STUDY TIPS ============ */
.tips-banner {
  background: linear-gradient(135deg, #0e1a38 0%, #14264f 100%);
  padding: 96px 24px;
}
.tips-label {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--accent);
  margin-bottom: 26px;
  position: relative;
  display: inline-block;
}
.tips-label::after {
  content: '';
  position: absolute;
  left: 0; bottom: -8px;
  width: 48px; height: 4px;
  background: var(--accent);
  border-radius: 2px;
}
.tips-carousel {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(244,196,0,.18);
  border-radius: var(--radius);
  padding: 40px 44px;
  min-height: 120px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
  touch-action: pan-y;
  user-select: none;
  cursor: grab;
}
.tips-carousel:active { cursor: grabbing; }
.tip { display: none; }
.tip.active { display: flex; gap: 28px; align-items: flex-start; }
.tip.slide-left  { animation: slideInLeft .45s var(--ease); }
.tip.slide-right { animation: slideInRight .45s var(--ease); }
.tip-num {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--accent), #c99a00);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tip p {
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  line-height: 1.75;
  padding-top: 8px;
  color: #fff;
  font-weight: 400;
}
.tip-dots { display: flex; gap: 10px; margin-top: 24px; }
.dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,.18);
  cursor: pointer;
  transition: background .3s, transform .3s var(--spring);
}
.dot.active { background: var(--accent); transform: scale(1.35); }

/* ============ SECTION / LEADERBOARD ============ */
.section { max-width: var(--max); margin: 0 auto; padding: 96px 24px; }
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 56px;
  position: relative;
  display: inline-block;
  color: #fff;
}
.section-title::after {
  content: '';
  position: absolute;
  left: 0; bottom: -10px;
  width: 52px; height: 4px;
  background: var(--accent);
  border-radius: 2px;
}
.leaderboard {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
.house {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  min-width: 120px;
  max-width: 160px;
  cursor: pointer;
}
.bar-track {
  width: 80px;
  height: var(--bar-max);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  position: relative;
}
.bar {
  width: 100%;
  border-radius: 10px 10px 0 0;
  background: var(--color, #888);
  height: 0;
  transition: height 1.4s var(--ease);
  box-shadow: 0 0 0 rgba(0,0,0,0);
}
.house:hover .bar {
  filter: brightness(1.3) drop-shadow(0 0 14px var(--color));
  transition: height 1.4s var(--ease), filter .3s ease;
}
.bar-pts {
  font-size: .85rem;
  font-weight: 900;
  color: #000;
  background: var(--accent);
  border-radius: 8px;
  padding: 4px 9px;
  position: absolute;
  top: -36px;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  opacity: 0;
  transition: opacity .4s ease, transform .4s var(--spring);
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(0,0,0,.45);
}
.bar-pts.visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.crest-wrap {
  width: 140px;
  margin-top: -4px;
  position: relative;
  transition: transform .35s var(--spring);
  z-index: 1;
}
.house:hover .crest-wrap { transform: scale(1.08) translateY(-4px); }
.crest-img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 8px 20px rgba(0,0,0,.7));
}
.house-name { font-size: .95rem; font-weight: 800; margin-top: 12px; text-align: center; color: #fff; }
.house-rank { font-size: .78rem; color: var(--accent); margin-top: 2px; font-weight: 700; }

/* ============ ABOUT ============ */
.about {
  background: linear-gradient(135deg, #14264f 0%, #0e1a38 100%);
  padding: 72px 24px;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,.06);
}
.about p { max-width: var(--max); margin: 0 auto; color: rgba(255,255,255,.7); font-size: 1.05rem; line-height: 1.8; }

/* ============ FEEDBACK ============ */
.feedback-section {
  background: var(--bg);
  padding: 96px 24px 110px;
}
.feedback-title {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: #fff;
  margin-bottom: 14px;
}
.feedback-sub {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
  max-width: 560px;
}
.feedback-form { display: flex; flex-direction: column; gap: 16px; }
.feedback-form input,
.feedback-form textarea {
  width: 100%;
  padding: 16px 18px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 14px;
  color: #fff;
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
  transition: border-color .25s ease, background .25s ease, box-shadow .25s ease;
}
.feedback-form input::placeholder,
.feedback-form textarea::placeholder { color: rgba(255,255,255,.4); }
.feedback-form input:focus,
.feedback-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255,255,255,.08);
  box-shadow: 0 0 0 4px rgba(244,196,0,.12);
}
.feedback-btn {
  align-self: flex-start;
  padding: 16px 36px;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 100px;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 8px 26px rgba(244,196,0,.28);
  transition: transform .3s var(--spring), box-shadow .3s var(--ease);
}
.feedback-btn:hover { transform: translateY(-4px) scale(1.03); box-shadow: 0 14px 36px rgba(244,196,0,.42); }
.feedback-btn:active { transform: scale(.96); }
.feedback-btn:disabled { opacity: .6; cursor: default; transform: none; }
.feedback-status {
  margin-top: 18px;
  font-size: .98rem;
  font-weight: 600;
  min-height: 1.4em;
  transition: opacity .3s ease;
}
.feedback-status.ok { color: var(--accent); }
.feedback-status.err { color: #e63946; }
@media (max-width: 600px) {
  .feedback-btn { align-self: stretch; text-align: center; }
}

/* ============ FOOTER ============ */
footer {
  background: #000;
  text-align: center;
  padding: 28px 24px;
  color: rgba(255,255,255,.4);
  font-size: .85rem;
  border-top: 2px solid var(--accent);
}

/* ============ MOBILE ============ */
@media (max-width: 600px) {
  .welcome, .poll-section, .tips-banner, .section,
  .feedback-section, .about { padding-left: 18px; padding-right: 18px; }
  .welcome { padding-top: 60px; padding-bottom: 60px; }
  .poll-section, .tips-banner, .section, .feedback-section { padding-top: 64px; padding-bottom: 64px; }
  .hero-logo-wrap { flex-direction: column; gap: 20px; }
  .hero-logo { height: 108px; }
  .poll-buttons { flex-direction: column; gap: 12px; }
  .poll-btn { width: 100%; padding: 22px 24px; }
  .tips-carousel { padding: 28px 22px; }
  .tip { gap: 18px !important; }
  .tip-num { font-size: 2.6rem; }
  .leaderboard { gap: 22px 10px; }
  .house { min-width: 90px; max-width: 110px; padding-top: 44px; }
  .bar-track { width: 56px; height: 190px; }
  .crest-wrap { width: 92px; }
  .house-name { font-size: .78rem; }
  .section-title { margin-bottom: 40px; }
}

/* ============ KEYFRAMES ============ */
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(32px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ============ REDUCED MOTION ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .blob { animation: none; }
}