/* Brain2 Challenge — Premium Landing Page CSS */
@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700;800;900&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --bg: #06060C;
  --bg2: #0D0D18;
  --bg3: #161625;
  --card: rgba(22,22,37,0.85);
  --gold: #F5C842;
  --gold-dim: #C9A220;
  --gold-glow: rgba(245,200,66,0.15);
  --gold-soft: rgba(245,200,66,0.08);
  --indigo: #6366F1;
  --indigo-glow: rgba(99,102,241,0.2);
  --text: #F0F0F8;
  --text2: #8888A8;
  --text3: #4A4A6A;
  --border: rgba(255,255,255,0.06);
  --border2: rgba(255,255,255,0.10);
  --border-gold: rgba(245,200,66,0.25);
  --grad-gold: linear-gradient(135deg,#F5C842,#E8A020);
  --font-h: 'Be Vietnam Pro',sans-serif;
  --font-b: 'Inter',sans-serif;
  --radius: 16px;
  --radius-xl: 24px;
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }

body {
  font-family: var(--font-b);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  font-size: 16px;
  line-height: 1.65;
}

h1,h2,h3,h4 { font-family: var(--font-h); font-weight:800; line-height:1.1; letter-spacing:-0.03em; }
h1 { font-size: clamp(2.5rem,6vw,4.5rem); }
h2 { font-size: clamp(1.875rem,3.5vw,2.75rem); }
h3 { font-size: clamp(1.25rem,2vw,1.625rem); }
p { line-height:1.7; }
a { text-decoration:none; }
img { display:block; max-width:100%; }

.container { max-width:1180px; margin:0 auto; padding:0 24px; }

/* NAV */
.nav {
  position:sticky; top:0; z-index:200;
  background: rgba(6,6,12,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display:flex; align-items:center; justify-content:space-between; padding:16px 24px; }
.nav-logo {
  font-family: var(--font-h); font-size:1.1rem; font-weight:900;
  background: var(--grad-gold); background-clip:text; -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  letter-spacing:-0.03em;
}
.nav-cta { padding:9px 20px !important; font-size:0.875rem !important; }

/* BUTTONS */
.btn-gold {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 28px; background:var(--grad-gold); color:#06060C;
  font-family:var(--font-h); font-weight:700; font-size:1rem;
  border:none; border-radius:var(--radius); cursor:pointer;
  transition:transform 0.2s, box-shadow 0.2s, filter 0.2s;
  box-shadow:0 4px 20px rgba(245,200,66,0.3);
  letter-spacing:-0.01em;
}
.btn-gold:hover { transform:translateY(-2px); box-shadow:0 8px 32px rgba(245,200,66,0.4); filter:brightness(1.05); color:#06060C; }
.btn-full { width:100%; }
.btn-lg { padding:16px 32px; font-size:1.0625rem; }

.btn-zalo {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 28px; background:#0068FF; color:#fff;
  font-family:var(--font-h); font-weight:700; font-size:1rem;
  border:none; border-radius:var(--radius); cursor:pointer;
  transition:transform 0.2s, box-shadow 0.2s;
  box-shadow:0 4px 20px rgba(0,104,255,0.3);
}
.btn-zalo:hover { transform:translateY(-2px); box-shadow:0 8px 28px rgba(0,104,255,0.4); color:#fff; }

.btn-chat {
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding:18px 40px; background:linear-gradient(135deg,#6366F1,#818CF8);
  color:#fff; font-family:var(--font-h); font-weight:700; font-size:1.0625rem;
  border:none; border-radius:var(--radius-xl); cursor:pointer;
  transition:transform 0.2s, box-shadow 0.2s;
  box-shadow:0 8px 32px rgba(99,102,241,0.4);
  letter-spacing:-0.01em;
}
.btn-chat:hover { transform:translateY(-3px); box-shadow:0 16px 48px rgba(99,102,241,0.5); color:#fff; }

/* UTILITIES */
.gold-text { background:var(--grad-gold); background-clip:text; -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.section-eyebrow { display:inline-block; font-size:0.75rem; font-weight:700; text-transform:uppercase; letter-spacing:0.12em; color:var(--gold); margin-bottom:12px; }
.section-header { text-align:center; margin-bottom:64px; }
.section-header h2 { margin-bottom:16px; }
.section-sub { color:var(--text2); font-size:1.125rem; max-width:540px; margin:0 auto; }

.eyebrow {
  display:inline-flex; align-items:center; gap:8px;
  padding:6px 16px; border-radius:999px;
  background: rgba(99,102,241,0.1); border:1px solid rgba(99,102,241,0.25);
  color:#A5B4FC; font-size:0.75rem; font-weight:700; text-transform:uppercase; letter-spacing:0.1em;
  margin-bottom:24px;
}
.dot { width:7px; height:7px; border-radius:50%; background:#6366F1; box-shadow:0 0 8px rgba(99,102,241,0.8); animation:pulse 2s ease-in-out infinite; flex-shrink:0; }

.badge {
  display:inline-flex; align-items:center; gap:6px; padding:6px 14px;
  background:var(--bg3); border:1px solid var(--border2); border-radius:999px;
  font-size:0.8125rem; font-weight:600; color:var(--text2);
}

/* HERO */
.hero {
  position:relative; min-height:100vh; display:flex; align-items:center;
  overflow:hidden; padding:120px 0 80px;
}
.hero-bg { position:absolute; inset:0; pointer-events:none; }
.orb { position:absolute; border-radius:50%; filter:blur(80px); animation:pulse 6s ease-in-out infinite; }
.orb1 { width:600px; height:600px; top:-150px; left:50%; transform:translateX(-50%); background:radial-gradient(circle,rgba(99,102,241,0.22),transparent); }
.orb2 { width:400px; height:400px; bottom:-100px; right:5%; background:radial-gradient(circle,rgba(245,200,66,0.12),transparent); animation-delay:3s; }
.grid-bg {
  position:absolute; inset:0;
  background-image:linear-gradient(rgba(255,255,255,0.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.025) 1px,transparent 1px);
  background-size:70px 70px;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 50%,black 20%,transparent 80%);
}
.hero-content {
  position:relative; z-index:1; text-align:center;
  max-width:780px; margin:0 auto;
  display:flex; flex-direction:column; align-items:center; gap:24px;
}
.hero-sub { font-size:1.125rem; color:var(--text2); max-width:560px; line-height:1.75; }
.hero-badges { display:flex; gap:10px; flex-wrap:wrap; justify-content:center; }
.hero-note { font-size:0.875rem; color:var(--text3); }

.scroll-cue {
  position:absolute; bottom:32px; left:50%; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:8px;
  color:var(--text3); font-size:0.7rem; text-transform:uppercase; letter-spacing:0.1em; font-weight:600; z-index:1;
}
.scroll-wheel { width:26px; height:42px; border:1.5px solid var(--border2); border-radius:13px; display:flex; justify-content:center; padding-top:7px; }
.scroll-dot { width:4px; height:8px; background:var(--gold); border-radius:2px; animation:scrollBounce 2s ease-in-out infinite; }

/* AUTHOR */
.author { padding:96px 0; background:var(--bg2); border-top:1px solid var(--border); }
.author-inner { display:grid; grid-template-columns:1fr 1.4fr; gap:80px; align-items:center; }
.author-photo-col { position:relative; }
.author-photo-wrap { border-radius:var(--radius-xl); overflow:hidden; box-shadow:0 40px 80px rgba(0,0,0,0.5); position:relative; }
.author-photo { width:100%; height:460px; object-fit:cover; object-position:center top; }
.author-photo-overlay { position:absolute; inset:0; background:linear-gradient(to bottom,transparent 55%,rgba(6,6,12,0.6)); }
.author-float-cards { display:flex; gap:12px; margin-top:16px; }
.float-card { background:var(--card); border:1px solid var(--border-gold); border-radius:var(--radius); padding:16px 20px; backdrop-filter:blur(12px); text-align:center; flex:1; }
.float-num { font-family:var(--font-h); font-size:1.625rem; font-weight:900; background:var(--grad-gold); background-clip:text; -webkit-background-clip:text; -webkit-text-fill-color:transparent; line-height:1; }
.float-lbl { font-size:0.75rem; color:var(--text3); margin-top:4px; font-weight:500; }
.author-text { display:flex; flex-direction:column; gap:20px; }
.author-title { color:var(--gold); font-family:var(--font-h); font-weight:700; font-size:0.9375rem; }
.author-text p { color:var(--text2); }
.author-creds { display:flex; flex-direction:column; gap:10px; }
.cred-item { display:flex; align-items:flex-start; gap:12px; font-size:0.9375rem; color:var(--text2); }
.cred-icon { width:22px; height:22px; background:var(--gold-soft); border:1px solid var(--border-gold); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:11px; color:var(--gold); font-weight:700; flex-shrink:0; margin-top:2px; }

/* WHAT IS */
.what-is { padding:96px 0; }
.what-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.what-card {
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-xl);
  padding:32px 24px; backdrop-filter:blur(12px); position:relative; overflow:hidden;
  transition:border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.what-card:hover { border-color:var(--border-gold); transform:translateY(-6px); box-shadow:0 24px 60px rgba(0,0,0,0.4),0 0 40px rgba(245,200,66,0.1); }
.what-icon { font-size:2rem; margin-bottom:16px; display:block; }
.what-card h3 { font-size:1.125rem; margin-bottom:10px; }
.what-card p { color:var(--text2); font-size:0.9375rem; }

/* ROADMAP */
.roadmap { padding:96px 0; background:var(--bg2); }
.week-block { margin-bottom:60px; }
.week-header {
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-xl);
  padding:28px 32px; margin-bottom:24px; backdrop-filter:blur(12px);
  display:flex; align-items:center; gap:20px;
}
.week-badge {
  padding:6px 16px; border-radius:999px; font-family:var(--font-h); font-size:0.8rem; font-weight:800; text-transform:uppercase; letter-spacing:0.08em; flex-shrink:0;
}
.w1 { background:rgba(245,200,66,0.15); color:var(--gold); border:1px solid rgba(245,200,66,0.3); }
.w2 { background:rgba(99,102,241,0.15); color:#818CF8; border:1px solid rgba(99,102,241,0.3); }
.w3 { background:rgba(16,185,129,0.15); color:#10B981; border:1px solid rgba(16,185,129,0.3); }
.week-title { font-family:var(--font-h); font-weight:800; font-size:1.125rem; }
.week-desc { color:var(--text2); font-size:0.9375rem; margin-left:auto; text-align:right; max-width:300px; }

.days-grid { display:grid; grid-template-columns:repeat(7,1fr); gap:12px; }
.day-card {
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
  padding:20px 16px; display:flex; flex-direction:column; gap:8px;
  backdrop-filter:blur(12px); transition:border-color 0.3s, transform 0.3s;
  position:relative; overflow:hidden;
}
.highlight-day { border-color:var(--border-gold); background:rgba(245,200,66,0.04); }
.day-num { font-size:0.75rem; font-weight:700; color:var(--text3); text-transform:uppercase; letter-spacing:0.06em; }
.day-title { font-family:var(--font-h); font-size:0.9375rem; font-weight:700; line-height:1.3; }
.day-desc { font-size:0.8125rem; color:var(--text2); line-height:1.5; flex:1; }
.day-btn {
  width:100%; padding:10px 12px; border-radius:10px; border:none; cursor:pointer;
  font-family:var(--font-h); font-size:0.8rem; font-weight:700; margin-top:4px;
  transition:all 0.2s;
}
.day-btn.unlocked {
  background:var(--grad-gold); color:#06060C;
  box-shadow:0 4px 16px rgba(245,200,66,0.3);
}
.day-btn.unlocked:hover { transform:translateY(-1px); box-shadow:0 6px 20px rgba(245,200,66,0.4); }
.day-btn.locked { background:var(--bg3); color:var(--text3); cursor:default; border:1px solid var(--border); }

/* SIGNUP */
.signup { padding:96px 0; }
.signup-inner { display:grid; grid-template-columns:1fr 1fr; gap:80px; align-items:center; }
.signup-text { display:flex; flex-direction:column; gap:20px; }
.signup-text p { color:var(--text2); font-size:1.0625rem; }
.signup-promises { display:flex; flex-direction:column; gap:10px; }
.promise { display:flex; align-items:center; gap:10px; font-size:0.9375rem; color:var(--text2); }
.promise span { color:var(--gold); font-weight:700; }
.signup-form-col {}
.signup-form { display:flex; flex-direction:column; gap:16px; background:var(--card); border:1px solid var(--border); border-radius:var(--radius-xl); padding:36px; backdrop-filter:blur(12px); }
.form-group { display:flex; flex-direction:column; gap:6px; }
.form-group label { font-size:0.875rem; font-weight:600; color:var(--text2); }
.form-input {
  width:100%; padding:14px 18px; background:var(--bg3); color:var(--text);
  font-family:var(--font-b); font-size:1rem; border:1.5px solid var(--border); border-radius:var(--radius);
  outline:none; transition:border-color 0.2s, box-shadow 0.2s;
}
.form-input:focus { border-color:var(--gold); box-shadow:0 0 0 3px rgba(245,200,66,0.1); }
.form-input::placeholder { color:var(--text3); }
.form-note { text-align:center; font-size:0.8125rem; color:var(--text3); }
.form-success { display:flex; flex-direction:column; align-items:center; gap:16px; text-align:center; background:var(--card); border:1px solid var(--border-gold); border-radius:var(--radius-xl); padding:40px 36px; }
.success-icon { font-size:3rem; }
.form-success h3 { font-size:1.5rem; }
.form-success p { color:var(--text2); }

/* ZALO */
.zalo-section { padding:40px 0; background:var(--bg2); border-top:1px solid var(--border); }
.zalo-inner { display:flex; align-items:center; justify-content:space-between; gap:32px; }
.zalo-text h3 { font-size:1.25rem; margin-bottom:6px; }
.zalo-text p { color:var(--text2); font-size:0.9375rem; }

/* CHAT */
.chat-section { padding:100px 0; background:var(--bg); position:relative; overflow:hidden; }
.chat-inner {
  max-width:680px; margin:0 auto; text-align:center;
  display:flex; flex-direction:column; align-items:center; gap:20px;
  position:relative; z-index:1;
}
.chat-glow { position:absolute; width:500px; height:500px; top:50%; left:50%; transform:translate(-50%,-50%); background:radial-gradient(circle,rgba(99,102,241,0.15),transparent 70%); border-radius:50%; filter:blur(60px); pointer-events:none; }
.chat-badge { padding:6px 16px; border-radius:999px; background:rgba(99,102,241,0.1); border:1px solid rgba(99,102,241,0.25); color:#A5B4FC; font-size:0.75rem; font-weight:700; text-transform:uppercase; letter-spacing:0.1em; }
.chat-inner h2 { font-size:clamp(2rem,4vw,3rem); }
.chat-inner p { color:var(--text2); font-size:1.0625rem; max-width:520px; }
.chat-note { font-size:0.8125rem; color:var(--text3); }

/* FOOTER */
.footer { padding:48px 0; background:var(--bg2); border-top:1px solid var(--border); }
.footer-inner { display:flex; flex-direction:column; align-items:center; gap:16px; text-align:center; }
.footer-logo { font-family:var(--font-h); font-size:1.25rem; font-weight:900; background:var(--grad-gold); background-clip:text; -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.footer-tagline { color:var(--text3); font-size:0.875rem; margin-top:4px; }
.footer-links { display:flex; gap:24px; }
.footer-links a { color:var(--text2); font-size:0.9375rem; transition:color 0.2s; }
.footer-links a:hover { color:var(--text); }
.footer-copy { color:var(--text3); font-size:0.8125rem; }

/* MODAL */
.modal-overlay { position:fixed; inset:0; background:rgba(0,0,0,0.7); backdrop-filter:blur(8px); z-index:500; display:flex; align-items:center; justify-content:center; opacity:0; pointer-events:none; transition:opacity 0.3s; }
.modal-overlay.open { opacity:1; pointer-events:all; }
.modal { background:var(--bg2); border:1px solid var(--border2); border-radius:var(--radius-xl); padding:40px; max-width:580px; width:90%; position:relative; max-height:80vh; overflow-y:auto; }
.modal-close { position:absolute; top:16px; right:16px; background:var(--bg3); border:1px solid var(--border); border-radius:50%; width:32px; height:32px; color:var(--text2); cursor:pointer; font-size:0.875rem; display:flex; align-items:center; justify-content:center; transition:color 0.2s; }
.modal-close:hover { color:var(--text); }
.modal-content h2 { margin-bottom:16px; font-size:1.5rem; }
.modal-content p { color:var(--text2); margin-bottom:12px; }

/* SCROLL REVEAL */
[data-reveal] { opacity:0; transform:translateY(40px); transition:opacity 0.75s cubic-bezier(0.16,1,0.3,1), transform 0.75s cubic-bezier(0.16,1,0.3,1); }
[data-reveal="left"] { transform:translateX(-50px); }
[data-reveal="right"] { transform:translateX(50px); }
[data-reveal].revealed { opacity:1; transform:none; }
[data-stagger] { opacity:0; transform:translateY(30px); transition:opacity 0.65s cubic-bezier(0.16,1,0.3,1), transform 0.65s cubic-bezier(0.16,1,0.3,1); }
[data-stagger].revealed { opacity:1; transform:none; }

/* ANIMATIONS */
@keyframes pulse { 0%,100%{opacity:0.6} 50%{opacity:1} }
@keyframes scrollBounce { 0%,100%{transform:translateY(0);opacity:1} 50%{transform:translateY(10px);opacity:0.3} }

/* RESPONSIVE */
@media(max-width:1100px) { .days-grid{grid-template-columns:repeat(4,1fr)} .what-grid{grid-template-columns:repeat(2,1fr)} }
@media(max-width:900px) {
  .author-inner { grid-template-columns:1fr; gap:48px; }
  .signup-inner { grid-template-columns:1fr; gap:48px; }
  .week-header { flex-direction:column; align-items:flex-start; gap:8px; }
  .week-desc { margin-left:0; text-align:left; max-width:none; }
  .zalo-inner { flex-direction:column; text-align:center; }
}
@media(max-width:640px) { .days-grid{grid-template-columns:repeat(2,1fr)} .what-grid{grid-template-columns:1fr} }
@media(max-width:480px) { .days-grid{grid-template-columns:1fr} }

/* ===== HERO CTAS ===== */
.hero-ctas { display:flex; gap:12px; flex-wrap:wrap; justify-content:center; }
.btn-outline-gold {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 28px; background:transparent; color:var(--gold);
  font-family:var(--font-h); font-weight:700; font-size:1rem;
  border:1.5px solid rgba(245,200,66,0.5); border-radius:var(--radius);
  cursor:pointer; transition:all 0.2s; letter-spacing:-0.01em;
}
.btn-outline-gold:hover { background:rgba(245,200,66,0.08); border-color:var(--gold); color:var(--gold); transform:translateY(-2px); }

/* ===== WEEK META ===== */
.week-meta { display:flex; flex-direction:column; gap:6px; }
.week-access { font-size:0.8125rem; font-weight:700; padding:4px 12px; border-radius:999px; width:fit-content; }
.free-tag { background:rgba(16,185,129,0.12); color:#10B981; border:1px solid rgba(16,185,129,0.3); }
.maker-tag { background:rgba(245,200,66,0.08); color:var(--gold-dim); border:1px solid rgba(245,200,66,0.25); }
.maker-only { opacity:0.85; }
.maker-only .week-header { border-left:3px solid rgba(245,200,66,0.4); }

/* ===== VIDEO SECTION ===== */
.video-section { padding:96px 0; background:var(--bg2); border-top:1px solid var(--border); }
.video-wrap { max-width:820px; margin:0 auto; }
.video-thumb {
  position:relative; border-radius:var(--radius-xl); overflow:hidden;
  background:var(--bg3); border:1px solid var(--border2); cursor:pointer;
  aspect-ratio:16/9;
  transition:transform 0.3s, box-shadow 0.3s;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
}
.video-thumb:hover { transform:scale(1.01); box-shadow:0 24px 60px rgba(0,0,0,0.5); }
.video-thumb-bg {
  position:absolute; inset:0;
  background:linear-gradient(135deg, rgba(99,102,241,0.08), rgba(245,200,66,0.04));
}
.play-btn {
  width:80px; height:80px; border-radius:50%;
  background:rgba(245,200,66,0.9); display:flex; align-items:center; justify-content:center;
  box-shadow:0 8px 32px rgba(245,200,66,0.4);
  transition:transform 0.2s, box-shadow 0.2s;
  position:relative; z-index:1; margin-bottom:20px;
}
.video-thumb:hover .play-btn { transform:scale(1.08); box-shadow:0 12px 40px rgba(245,200,66,0.5); }
.play-icon { font-size:1.5rem; color:#06060C; margin-left:4px; }
.video-label { position:relative; z-index:1; font-family:var(--font-h); font-size:1rem; font-weight:700; color:var(--text2); }
.video-coming { position:relative; z-index:1; font-size:0.8125rem; color:var(--text3); margin-top:8px; }

/* ===== CONAN SECTION ===== */
.conan-section { padding:96px 0; background:var(--bg2); border-top:1px solid var(--border); }
.conan-grid { display:grid; grid-template-columns:1fr 1fr; gap:24px; max-width:900px; margin:0 auto; }
.conan-card {
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-xl);
  padding:40px 36px; display:flex; flex-direction:column; gap:16px;
  backdrop-filter:blur(12px); transition:border-color 0.3s, transform 0.3s;
  position:relative; overflow:hidden;
}
.conan-card:hover { border-color:var(--border-gold); transform:translateY(-6px); }
.featured-card { border-color:var(--border-gold); background:rgba(245,200,66,0.03); }
.featured-badge {
  position:absolute; top:20px; right:20px;
  background:var(--gold-soft); border:1px solid var(--border-gold); border-radius:999px;
  font-size:0.75rem; font-weight:700; color:var(--gold); padding:4px 12px;
}
.conan-logo-wrap { display:flex; flex-direction:column; line-height:1; }
.conan-logo-text { font-family:var(--font-h); font-size:2rem; font-weight:900; background:var(--grad-gold); background-clip:text; -webkit-background-clip:text; -webkit-text-fill-color:transparent; letter-spacing:-0.04em; }
.conan-logo-sub { font-family:var(--font-h); font-size:0.8rem; font-weight:800; color:var(--text3); letter-spacing:0.2em; text-transform:uppercase; margin-top:2px; }
.conan-card p { color:var(--text2); font-size:0.9375rem; line-height:1.7; }
.conan-features { list-style:none; display:flex; flex-direction:column; gap:8px; flex:1; }
.conan-features li { font-size:0.9375rem; color:var(--text2); display:flex; gap:8px; }
.btn-conan {
  display:inline-flex; align-items:center; padding:12px 24px;
  background:transparent; color:var(--text); border:1.5px solid var(--border2);
  border-radius:var(--radius); font-family:var(--font-h); font-weight:700; font-size:0.9375rem;
  transition:all 0.2s; width:fit-content;
}
.btn-conan:hover { border-color:var(--gold); color:var(--gold); }

/* SIGNUP NOTE BOX */
.signup-note-box {
  background:var(--bg3); border:1px solid var(--border2); border-radius:var(--radius);
  padding:16px 20px; display:flex; flex-direction:column; gap:8px;
}
.signup-note-box p { font-size:0.9375rem; color:var(--text2); line-height:1.6; }
.signup-note-box strong { color:var(--text); }
.signup-note-box a { color:var(--gold); font-weight:600; }
.signup-note-box a:hover { text-decoration:underline; }

/* FACEBOOK BUTTON */
.btn-facebook {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 28px; background:#1877F2; color:#fff;
  font-family:var(--font-h); font-weight:700; font-size:1rem;
  border:none; border-radius:var(--radius); cursor:pointer;
  transition:transform 0.2s, box-shadow 0.2s;
  box-shadow:0 4px 20px rgba(24,119,242,0.3);
}
.btn-facebook:hover { transform:translateY(-2px); box-shadow:0 8px 28px rgba(24,119,242,0.4); color:#fff; }

/* ZALO CTAS */
.zalo-ctas { display:flex; gap:12px; flex-wrap:wrap; }
.zalo-inner { align-items:flex-start; }

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:none} }
@keyframes shimmer { 0%{background-position:0% 50%} 100%{background-position:200% 50%} }

/* Animated underline for links */
.week-header, .conan-card, .day-card { transition:all 0.3s cubic-bezier(0.16,1,0.3,1); }

/* Pulsing glow on play button */
@keyframes playPulse {
  0%,100%{box-shadow:0 8px 32px rgba(245,200,66,0.4)}
  50%{box-shadow:0 8px 48px rgba(245,200,66,0.7)}
}
.play-btn { animation:playPulse 2.5s ease-in-out infinite; }

/* Shimmer on gold text */
.gold-text {
  background: linear-gradient(90deg,#F5C842,#FFF8DC,#F5C842);
  background-size:200% auto;
  animation:shimmer 3s linear infinite;
  background-clip:text; -webkit-background-clip:text; -webkit-text-fill-color:transparent;
}

/* Maker-only week: dim day cards */
.maker-only .day-btn.locked { opacity:0.6; }

@media(max-width:900px) {
  .hero-ctas { flex-direction:column; align-items:center; }
  .conan-grid { grid-template-columns:1fr; }
  .zalo-ctas { flex-direction:column; }
  .video-wrap { max-width:100%; }
}

/* ===== JOIN SECTION ===== */
.join-section { padding:100px 0; background:var(--bg); }
.join-inner {
  max-width:680px; margin:0 auto; text-align:center;
  position:relative; padding:64px 48px;
  background:var(--card); border:1px solid var(--border-gold);
  border-radius:var(--radius-xl); backdrop-filter:blur(20px);
}
.join-glow {
  position:absolute; inset:-2px; border-radius:var(--radius-xl);
  background:linear-gradient(135deg,rgba(245,200,66,0.15),transparent,rgba(245,200,66,0.1));
  z-index:-1; pointer-events:none;
}
.join-inner h2 { font-size:2rem; margin:12px 0 16px; letter-spacing:-.03em; }
.join-desc { color:var(--text2); font-size:1rem; line-height:1.7; margin:0 0 32px; }
.join-points {
  display:grid; grid-template-columns:1fr 1fr; gap:10px 24px;
  text-align:left; margin:0 0 36px;
}
.join-point {
  display:flex; align-items:flex-start; gap:10px;
  font-size:0.9375rem; color:var(--text2);
}
.join-point span { color:#10B981; font-weight:700; flex-shrink:0; margin-top:2px; }
.join-ctas { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-bottom:20px; }
.btn-xl { padding:18px 36px !important; font-size:1.0625rem !important; }
.join-note { font-size:0.875rem; color:var(--text3); }
.join-note a { color:var(--gold); font-weight:600; }
.join-note a:hover { text-decoration:underline; }

@media(max-width:640px){
  .join-inner { padding:40px 24px; }
  .join-points { grid-template-columns:1fr; }
  .join-ctas { flex-direction:column; }
  .join-inner h2 { font-size:1.5rem; }
}