/* ============================================================
   BASE.CSS — Layout, Typography, Components
   Test XYZ Tuition Centre
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,800;1,400&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600&family=Space+Mono:wght@400;700&display=swap');

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  transition: background 0.35s ease, color 0.35s ease;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 5vw; height: 70px;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: height 0.3s ease;
}
nav.scrolled { height: 58px; }

.logo { display: flex; flex-direction: column; gap: 0; text-decoration: none; color: var(--text); }
.logo-main {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.45rem; font-weight: 800;
  letter-spacing: -0.02em; line-height: 1;
}
.logo-sub {
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem; font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase;
  opacity: 0.45; line-height: 1.3;
}

.nav-links { display: flex; align-items: center; gap: 2rem; list-style: none; }
.nav-links a {
  font-size: 0.88rem; font-weight: 500;
  color: var(--text); text-decoration: none;
  opacity: 0.7; transition: opacity 0.2s;
  letter-spacing: 0.02em;
}
.nav-links a:hover, .nav-links a.active { opacity: 1; }

.nav-cta {
  padding: 10px 22px; border-radius: 7px;
  background: var(--btn-bg); color: var(--btn-text);
  font-size: 0.85rem; font-weight: 600; letter-spacing: 0.02em;
  text-decoration: none; transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
}
.nav-cta:hover { opacity: 0.88; transform: translateY(-1px); }

/* Hamburger */
.burger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px; z-index: 950;
}
.burger span {
  display: block; width: 24px; height: 2px;
  background: var(--text); border-radius: 2px; transition: all 0.3s ease;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mm {
  display: none; position: fixed; inset: 0; z-index: 899;
  background: var(--mm-bg);
  flex-direction: column; align-items: center; justify-content: center; gap: 2rem;
  list-style: none;
  opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.mm.open { opacity: 1; pointer-events: all; }
.mm li a {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 2.4rem; font-weight: 600;
  color: var(--text); text-decoration: none; opacity: 0.85;
}
.mm li a:hover { opacity: 1; }

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; gap: 4rem;
  padding: 120px 5vw 80px;
  background: var(--bg);
}

.badge {
  display: inline-block;
  font-family: 'Space Mono', monospace;
  font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.18em; text-transform: uppercase;
  padding: 7px 16px; border-radius: 100px;
  background: var(--badge-bg); color: var(--badge-text);
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(2.8rem, 5vw, 5.2rem);
  font-weight: 800; line-height: 1.07;
  letter-spacing: -0.03em; color: var(--text);
  margin-bottom: 1.4rem;
}
.hero h1 em { font-style: italic; font-weight: 400; }

.hero-sub {
  font-size: 1.05rem; font-weight: 300;
  color: var(--text); opacity: 0.7;
  max-width: 460px; line-height: 1.75; margin-bottom: 2.2rem;
}

.hero-btns { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 8px;
  font-size: 0.9rem; font-weight: 600; letter-spacing: 0.02em;
  font-family: 'DM Sans', sans-serif;
  text-decoration: none; cursor: pointer; border: none;
  transition: transform 0.2s ease, opacity 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-p { background: var(--btn-bg); color: var(--btn-text); }
.btn-p:hover { opacity: 0.88; }
.btn-s { background: none; color: var(--text); border: 2px solid var(--btn2-border); }
.btn-s:hover { background: rgba(128,128,128,0.07); }
.btn-submit { width: 100%; justify-content: center; }

.hero-stats {
  display: flex; gap: 2.5rem; flex-wrap: wrap;
  margin-top: 2.8rem; padding-top: 2.2rem;
  border-top: 1px solid var(--border);
}
.stat-n {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 2rem; font-weight: 800;
  letter-spacing: -0.03em; line-height: 1; color: var(--text);
}
.stat-l {
  font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.08em; opacity: 0.5;
  margin-top: 4px; color: var(--text);
}

/* Hero visual */
.hero-vis {
  display: flex; align-items: center; justify-content: center;
}
.card-stack { position: relative; width: 360px; height: 460px; }
.hcard {
  position: absolute; border-radius: 18px;
  padding: 1.8rem; transition: all 0.4s ease;
  background: var(--card3);
}
.hcard:nth-child(1) { background: var(--card1); width: 280px; height: 180px; bottom: 0; right: 0; transform: rotate(5deg); opacity: 0.45; }
.hcard:nth-child(2) { background: var(--card2); width: 310px; height: 190px; bottom: 50px; left: 20px; transform: rotate(-3deg); opacity: 0.65; }
.hcard:nth-child(3) { width: 350px; top: 0; left: 0; border: 1px solid var(--border); }

.hcard-tag {
  font-family: 'Space Mono', monospace;
  font-size: 0.62rem; font-weight: 700;
  letter-spacing: 0.18em; text-transform: uppercase;
  opacity: 0.45; color: var(--text); margin-bottom: 0.9rem;
}
.hcard-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.7rem; font-weight: 700; line-height: 1.2;
  color: var(--text); margin-bottom: 0.5rem;
}
.hcard-meta { font-size: 0.82rem; opacity: 0.5; color: var(--text); margin-bottom: 1.4rem; }
.prog-bar { height: 4px; border-radius: 2px; background: var(--prog-bg); overflow: hidden; margin-bottom: 6px; }
.prog-fill { height: 100%; width: 72%; background: var(--prog-fill); border-radius: 2px; }
.prog-label { font-size: 0.72rem; opacity: 0.45; color: var(--text); }

/* ── STATS BAND ── */
.stats-band {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--stat-bg);
  border-top: 1px solid var(--stat-border);
  border-bottom: 1px solid var(--stat-border);
}
.sb-item {
  padding: 2.5rem 2rem; text-align: center;
  border-right: 1px solid var(--stat-border);
}
.sb-item:last-child { border-right: none; }
.sb-n {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 2.8rem; font-weight: 800;
  letter-spacing: -0.04em; line-height: 1; margin-bottom: 0.4rem;
  color: var(--stat-text);
}
.sb-l {
  font-size: 0.78rem; text-transform: uppercase;
  letter-spacing: 0.08em; opacity: 0.55;
  color: var(--stat-text);
}

/* ── SECTIONS ── */
section { padding: 96px 5vw; background: var(--bg); }
section:nth-of-type(even) { background: var(--bg2); }

.sec-tag {
  font-family: 'Space Mono', monospace;
  font-size: 0.66rem; font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase;
  opacity: 0.4; color: var(--text); margin-bottom: 0.9rem;
}
.sec-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(2rem, 3.5vw, 3.2rem);
  font-weight: 800; letter-spacing: -0.03em; line-height: 1.1;
  color: var(--text); margin-bottom: 1rem;
}
.sec-title em { font-style: italic; font-weight: 400; }
.sec-sub {
  font-size: 1rem; font-weight: 300; opacity: 0.65;
  max-width: 540px; line-height: 1.75; color: var(--text);
}

/* ── COURSES ── */
.courses-wrap {
  border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden;
  margin-top: 3.5rem;
  display: grid; grid-template-columns: repeat(3, 1fr);
}
.course-card {
  padding: 2.2rem; position: relative; cursor: pointer;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg3); transition: background 0.25s ease;
  overflow: hidden;
}
.course-card:hover { background: var(--bg4); }
.cc-icon { font-size: 2rem; margin-bottom: 1rem; display: block; }
.cc-name {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.3rem; font-weight: 700; color: var(--text);
  letter-spacing: -0.02em; margin-bottom: 0.6rem;
}
.cc-desc { font-size: 0.87rem; opacity: 0.58; color: var(--text); line-height: 1.65; margin-bottom: 1.3rem; }
.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 5px 11px; border-radius: 100px;
  background: var(--chip-bg); color: var(--chip-text);
}
.cc-arrow {
  position: absolute; top: 1.8rem; right: 1.8rem;
  font-size: 1.1rem; color: var(--text); opacity: 0;
  transform: translateX(-6px); transition: all 0.25s ease;
}
.course-card:hover .cc-arrow { opacity: 1; transform: translateX(0); }

/* ── TUTORS ── */
#tutors { background: var(--bg2) !important; }

.tutors-head {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: 3.5rem; flex-wrap: wrap; gap: 2rem;
}
.tutors-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.4rem;
}
.tutor-card {
  border-radius: 14px; overflow: hidden;
  background: var(--bg3); transition: transform 0.3s ease;
}
.tutor-card:hover { transform: translateY(-5px); }
.tutor-av {
  height: 190px; display: flex; align-items: center; justify-content: center;
  background: var(--tutor-av);
}
.tutor-init {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 2.4rem; font-weight: 700; color: var(--accent);
}
.tutor-info { padding: 1.4rem; }
.tutor-name {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.1rem; font-weight: 700; color: var(--text); margin-bottom: 4px;
}
.tutor-subj {
  font-family: 'Space Mono', monospace;
  font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.05em;
  opacity: 0.45; color: var(--text); margin-bottom: 0.9rem;
}
.tutor-rating { display: flex; align-items: center; gap: 6px; }
.stars { color: var(--star); font-size: 0.75rem; letter-spacing: 2px; }
.rating-n { font-size: 0.85rem; font-weight: 600; color: var(--text); }
.rating-c { font-size: 0.75rem; opacity: 0.4; color: var(--text); }

/* ── TESTIMONIALS ── */
#testimonials { background: var(--bg) !important; }

.testi-inner {
  display: grid; grid-template-columns: 1fr 2fr;
  gap: 6rem; align-items: start;
}
.testi-track {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem;
}
.testi-card {
  border-radius: 14px; padding: 1.8rem; transition: transform 0.3s ease;
}
.testi-card:nth-child(odd)  { background: var(--testi1); }
.testi-card:nth-child(even) { background: var(--testi2); }
.testi-card:nth-child(2) { margin-top: 2.2rem; }
.testi-card:nth-child(4) { margin-top: 2.2rem; }
.testi-card:hover { transform: translateY(-4px); }
.testi-q {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1rem; font-style: italic; line-height: 1.65;
  color: var(--text); opacity: 0.9; margin-bottom: 1.4rem;
}
.testi-author { display: flex; align-items: center; gap: 10px; }
.tav {
  width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--tutor-av); flex-shrink: 0;
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 0.85rem; font-weight: 700; color: var(--accent);
}
.tav-name { font-weight: 600; font-size: 0.87rem; color: var(--text); margin-bottom: 2px; }
.tav-grade {
  font-family: 'Space Mono', monospace;
  font-size: 0.62rem; opacity: 0.45; letter-spacing: 0.04em; color: var(--text);
}

/* ── CTA / CONTACT ── */
.cta-wrap { padding: 0 5vw 80px; background: var(--bg); }
.cta-inner {
  background: var(--cta-bg);
  border-radius: 22px; padding: 72px 6vw;
  display: grid; grid-template-columns: 1fr 1fr; gap: 5rem;
  align-items: center;
}
.cta-tag { color: #fff !important; opacity: 0.45 !important; }
.cta-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(1.9rem, 3.5vw, 2.9rem);
  font-weight: 800; line-height: 1.1; letter-spacing: -0.03em;
  color: #fff; margin-bottom: 1rem;
}
.cta-title em { font-style: italic; }
.cta-sub { font-size: 0.95rem; opacity: 0.65; color: #fff; line-height: 1.7; margin-bottom: 1.8rem; }
.cta-details {
  display: flex; flex-direction: column; gap: 0.6rem;
  font-size: 0.88rem; color: rgba(255,255,255,0.6);
}

.enrol-form { display: flex; flex-direction: column; gap: 0.85rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.85rem; }
.fg { display: flex; flex-direction: column; gap: 5px; }
.fg label {
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: rgba(255,255,255,0.5);
}
.fg input, .fg select {
  padding: 13px 15px; border-radius: 8px; font-size: 0.9rem;
  font-family: 'DM Sans', sans-serif; outline: none;
  background: rgba(255,255,255,0.1); border: 2px solid rgba(255,255,255,0.18);
  color: #fff; transition: border 0.2s ease; -webkit-appearance: none;
  width: 100%;
}
.fg input::placeholder { color: rgba(255,255,255,0.35); }
.fg input:focus, .fg select:focus { border-color: rgba(255,255,255,0.55); }
.fg select option { background: #1a3a6e; color: #fff; }
.btn-submit { background: #fff !important; color: #0a0a0a !important; }

/* ── FOOTER ── */
footer {
  background: var(--footer-bg); padding: 72px 5vw 36px;
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem; margin-bottom: 3.5rem; padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--border);
}
.footer-brand {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.55rem; font-weight: 800; color: var(--text);
  letter-spacing: -0.02em; margin-bottom: 0.8rem;
}
.footer-tagline { font-size: 0.87rem; opacity: 0.45; color: var(--text); line-height: 1.7; max-width: 260px; }
.fcol h4 {
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; opacity: 0.38; color: var(--text); margin-bottom: 1.1rem;
}
.fcol ul { list-style: none; display: flex; flex-direction: column; gap: 0.65rem; }
.fcol ul a { font-size: 0.88rem; color: var(--text); opacity: 0.6; text-decoration: none; transition: opacity 0.2s; }
.fcol ul a:hover { opacity: 1; }
.footer-btm {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.78rem; opacity: 0.35; color: var(--text); flex-wrap: wrap; gap: 1rem;
}

/* ── SETTINGS FAB + PANEL ── */
.fab {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 800;
  width: 52px; height: 52px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--fab-bg); color: var(--fab-text);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem; box-shadow: 0 6px 28px rgba(0,0,0,0.25);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.fab:hover { transform: scale(1.08) rotate(20deg); }
.fab.open  { transform: rotate(60deg) scale(1.05); }

.settings-panel {
  position: fixed; bottom: 6rem; right: 2rem; z-index: 799;
  width: 300px; border-radius: 18px;
  background: var(--panel-bg); border: 1px solid var(--border);
  padding: 1.4rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  transform: translateY(16px) scale(0.96);
  opacity: 0; pointer-events: none;
  transition: all 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.settings-panel.open { transform: translateY(0) scale(1); opacity: 1; pointer-events: all; }

.panel-title {
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; opacity: 0.4; color: var(--text);
  margin-bottom: 1rem;
}
.theme-opts { display: flex; flex-direction: column; gap: 0.65rem; }
.theme-opt {
  display: flex; align-items: center; gap: 0.9rem;
  padding: 12px 14px; border-radius: 11px; cursor: pointer;
  background: var(--panel-item); border: 2px solid transparent;
  transition: all 0.2s ease; width: 100%; text-align: left;
}
.theme-opt:hover { background: var(--panel-hover); transform: translateX(3px); }
.theme-opt.active { border-color: var(--accent); }

.swatch {
  width: 38px; height: 38px; border-radius: 9px; flex-shrink: 0;
  border: 2px solid rgba(128,128,128,0.15);
}
.sw-mono { background: linear-gradient(135deg, #0a0a0a 50%, #f0f0f0 50%); }
.sw-blue { background: linear-gradient(135deg, #1a3a6e 50%, #e8f0fc 50%); }

.opt-name { display: block; font-weight: 600; font-size: 0.88rem; color: var(--text); margin-bottom: 2px; }
.opt-tag {
  font-family: 'Space Mono', monospace;
  font-size: 0.58rem; letter-spacing: 0.1em; text-transform: uppercase;
  opacity: 0.42; color: var(--text);
}

/* ── SCROLL REVEAL ── */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.65s ease, transform 0.65s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }
.d1 { transition-delay: 0.1s; }
.d2 { transition-delay: 0.2s; }
.d3 { transition-delay: 0.3s; }

/* ── RESPONSIVE ── */
@media (max-width: 1100px) {
  .tutors-grid  { grid-template-columns: repeat(2, 1fr); }
  .courses-wrap { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 110px; }
  .hero-sub { margin: 0 auto 2rem; }
  .hero-btns { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-vis { display: none; }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .testi-inner { grid-template-columns: 1fr; gap: 3rem; }
  .cta-inner { grid-template-columns: 1fr; padding: 52px 5vw; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .burger { display: flex; }
  .mm { display: flex; }
  .nav-cta { display: none; }
}

@media (max-width: 640px) {
  section { padding: 64px 5vw; }
  .courses-wrap { grid-template-columns: 1fr; }
  .tutors-grid  { grid-template-columns: repeat(2, 1fr); }
  .stats-band   { grid-template-columns: repeat(2, 1fr); }
  .testi-track  { grid-template-columns: 1fr; }
  .testi-card:nth-child(2), .testi-card:nth-child(4) { margin-top: 0; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid  { grid-template-columns: 1fr; }
  .settings-panel { width: calc(100vw - 2.5rem); right: 1.25rem; }
  .fab { bottom: 1.5rem; right: 1.5rem; }
}