/* ===== TradeVidya Landing Page ===== */
:root {
  --bg: #f4f9fd;
  --bg-2: #eaf4fb;
  --card: rgba(255, 255, 255, 0.85);
  --border: rgba(42, 171, 238, 0.18);
  --text: #172b3a;
  --muted: #71889a;
  --green: #2aabee;
  --gold: #229ed9;
  --blue: #2aabee;
  --red: #ef5368;
  --radius: 18px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1140px, 92%); margin: 0 auto; }
section { padding: 90px 0; position: relative; }

/* ===== Animated background ===== */
.bg-glow {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(600px 400px at 15% 10%, rgba(42, 171, 238, 0.14), transparent 70%),
    radial-gradient(600px 400px at 85% 30%, rgba(42, 171, 238, 0.12), transparent 70%),
    radial-gradient(700px 500px at 50% 100%, rgba(42, 171, 238, 0.07), transparent 70%);
  animation: glowShift 14s ease-in-out infinite alternate;
}
@keyframes glowShift {
  from { transform: scale(1) translateY(0); }
  to   { transform: scale(1.08) translateY(-20px); }
}
.candles { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; opacity: 0.35; }
.candle {
  position: absolute; bottom: -120px; width: 10px; border-radius: 3px;
  animation: rise linear infinite;
}
.candle::before { content: ""; position: absolute; left: 50%; top: -18px; bottom: -18px; width: 2px; background: inherit; transform: translateX(-50%); }
.candle.up { background: var(--green); }
.candle.down { background: var(--red); }
@keyframes rise {
  0%   { transform: translateY(0); opacity: 0; }
  10%  { opacity: 1; }
  100% { transform: translateY(-120vh); opacity: 0; }
}

/* ===== Navbar ===== */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { font-size: 1.45rem; font-weight: 800; letter-spacing: -0.5px; }
.logo span { color: var(--green); }
.nav-links { display: flex; gap: 30px; list-style: none; }
.nav-links a { color: var(--muted); font-weight: 500; transition: color 0.25s; }
.nav-links a:hover { color: var(--text); }
.menu-btn { display: none; background: none; border: 0; color: var(--text); font-size: 1.7rem; cursor: pointer; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; border: 0; cursor: pointer;
  font-size: 1rem; font-weight: 700; font-family: inherit;
  transition: transform 0.25s, box-shadow 0.25s;
}
.btn:hover { transform: translateY(-3px); }
.btn-primary {
  background: linear-gradient(135deg, #2aabee, #229ed9);
  color: #ffffff; box-shadow: 0 8px 28px rgba(42, 171, 238, 0.28);
}
.btn-primary:hover { box-shadow: 0 12px 36px rgba(42, 171, 238, 0.42); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--green); color: var(--green); }
.btn-telegram { background: linear-gradient(135deg, #2aabee, #1b8ccf); color: #fff; box-shadow: 0 8px 28px rgba(42, 171, 238, 0.4); }
.pulse { animation: pulse 2.2s infinite; }
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(42, 171, 238, 0.55); }
  70%  { box-shadow: 0 0 0 18px rgba(42, 171, 238, 0); }
  100% { box-shadow: 0 0 0 0 rgba(42, 171, 238, 0); }
}

/* ===== Hero ===== */
.hero { min-height: 100vh; display: flex; align-items: center; padding-top: 120px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items: center; }
.badge {
  display: inline-block; padding: 7px 16px; border-radius: 999px;
  background: rgba(42, 171, 238, 0.09); border: 1px solid rgba(42, 171, 238, 0.28);
  color: var(--green); font-size: 0.85rem; font-weight: 600; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(2.4rem, 5.5vw, 4.2rem); line-height: 1.08; font-weight: 800; letter-spacing: -1.5px; }
.gradient-text {
  background: linear-gradient(90deg, #229ed9, #2aabee, #74d4ff, #229ed9);
  background-size: 300% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shine 6s linear infinite;
}
@keyframes shine { to { background-position: 300% 0; } }
.hero p.lead { margin: 22px 0 34px; color: var(--muted); font-size: 1.15rem; max-width: 540px; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 14px; }

/* Hero chart card */
.chart-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; backdrop-filter: blur(10px);
  animation: float 5s ease-in-out infinite;
}
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
.chart-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; font-weight: 600; }
.live { color: var(--green); font-size: 0.8rem; display: flex; align-items: center; gap: 6px; }
.live::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: blink 1.2s infinite; }
@keyframes blink { 50% { opacity: 0.2; } }
.chart-card svg { width: 100%; height: auto; display: block; }
.draw { stroke-dasharray: 800; stroke-dashoffset: 800; animation: draw 3.5s ease forwards infinite; }
@keyframes draw { 0% { stroke-dashoffset: 800; } 70%,100% { stroke-dashoffset: 0; } }

/* ===== Ticker ===== */
.ticker { background: var(--bg-2); border-block: 1px solid var(--border); overflow: hidden; padding: 14px 0; }
.ticker-track { display: flex; gap: 60px; width: max-content; animation: scroll 28s linear infinite; }
.ticker-track span { white-space: nowrap; color: var(--muted); font-weight: 600; }
.ticker-track b { color: var(--green); margin-left: 6px; }
.ticker-track .dn { color: var(--red); }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ===== Section titles ===== */
.section-title { text-align: center; margin-bottom: 56px; }
.section-title h2 { font-size: clamp(1.9rem, 4vw, 2.8rem); letter-spacing: -1px; }
.section-title p { color: var(--muted); margin-top: 10px; }

/* ===== About ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-grid h3 { font-size: 1.9rem; margin-bottom: 16px; }
.about-grid p { color: var(--muted); margin-bottom: 14px; }
.checks { list-style: none; margin-top: 18px; }
.checks li { padding-left: 30px; position: relative; margin-bottom: 10px; }
.checks li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 800; }
.about-visual {
  background: linear-gradient(145deg, rgba(42,171,238,0.10), rgba(42,171,238,0.10));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 40px; text-align: center; font-size: 5rem;
}
.about-visual small { display: block; font-size: 1rem; color: var(--muted); margin-top: 10px; }

/* ===== Cards ===== */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 26px; transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.card:hover { transform: translateY(-8px); border-color: var(--green); box-shadow: 0 18px 40px rgba(42, 171, 238, 0.12); }
.card .icon { font-size: 2.2rem; margin-bottom: 14px; }
.card h4 { font-size: 1.2rem; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 0.97rem; }

/* ===== Steps ===== */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; counter-reset: s; }
.step { text-align: center; padding: 26px; }
.step::before {
  counter-increment: s; content: counter(s);
  display: grid; place-items: center; width: 56px; height: 56px; margin: 0 auto 16px;
  border-radius: 50%; background: linear-gradient(135deg, var(--green), var(--blue));
  color: #ffffff; font-weight: 800; font-size: 1.3rem;
}
.step p { color: var(--muted); margin-top: 6px; }

/* ===== CTA ===== */
.cta-box {
  text-align: center; padding: 64px 30px; border-radius: 28px;
  background: linear-gradient(135deg, rgba(42,171,238,0.18), rgba(42,171,238,0.14));
  border: 1px solid var(--border);
}
.cta-box h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 12px; }
.cta-box p { color: var(--muted); margin-bottom: 28px; }

/* ===== FAQ ===== */
.faq { max-width: 780px; margin: 0 auto; }
.faq details { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 18px 22px; margin-bottom: 14px; }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; }
.faq summary::after { content: "+"; float: right; color: var(--green); font-size: 1.3rem; }
.faq details[open] summary::after { content: "–"; }
.faq p { color: var(--muted); margin-top: 12px; }

/* ===== Footer ===== */
footer { border-top: 1px solid var(--border); padding: 40px 0; text-align: center; color: var(--muted); font-size: 0.9rem; }
footer .disclaimer { max-width: 820px; margin: 14px auto 0; font-size: 0.8rem; opacity: 0.8; }

/* ===== Scroll reveal ===== */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.show { opacity: 1; transform: none; }

/* ===== Telegram popup ===== */
.tg-overlay {
  position: fixed; inset: 0; z-index: 999; display: grid; place-items: center;
  background: rgba(18, 43, 61, 0.38); backdrop-filter: blur(6px);
  opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s;
}
.tg-overlay.open { opacity: 1; visibility: visible; }
.tg-popup {
  position: relative; width: min(420px, 90%); text-align: center;
  background: linear-gradient(160deg, #ffffff, #f0f8fd);
  border: 1px solid rgba(42, 171, 238, 0.4); border-radius: 26px; padding: 40px 30px 34px;
  box-shadow: 0 30px 80px rgba(42, 171, 238, 0.25);
  transform: scale(0.8) translateY(30px); transition: transform 0.4s cubic-bezier(.2,1.3,.4,1);
}
.tg-overlay.open .tg-popup { transform: none; }
.tg-icon {
  width: 84px; height: 84px; margin: 0 auto 18px; border-radius: 50%;
  display: grid; place-items: center; background: var(--blue);
  animation: pulse 2.2s infinite;
}
.tg-icon svg { width: 44px; height: 44px; fill: #fff; margin-left: -3px; }
.tg-popup h3 { font-size: 1.6rem; margin-bottom: 8px; }
.tg-popup p { color: var(--muted); margin-bottom: 24px; }
.tg-popup .btn { width: 100%; justify-content: center; font-size: 1.1rem; padding: 15px; }
.tg-close {
  position: absolute; top: 14px; right: 18px; background: none; border: 0;
  color: var(--muted); font-size: 1.8rem; cursor: pointer; line-height: 1;
}
.tg-close:hover { color: var(--blue); }
.tg-later { display: block; margin-top: 14px; color: var(--muted); font-size: 0.85rem; background: none; border: 0; cursor: pointer; font-family: inherit; }

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .hero-grid, .about-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; position: absolute; top: 70px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--bg-2); border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-links li { padding: 14px 6%; border-top: 1px solid var(--border); }
  .menu-btn { display: block; }
  .nav .btn { display: none; }
  section { padding: 64px 0; }
}