/* ==========================================================
   Nullik Academy — Premium SaaS Design System
   ========================================================== */

:root {
  --primary: #0076FA;
  --accent: #42A5FF;
  --dark: #071226;
  --success: #22C55E;
  --warning: #F59E0B;
  --danger: #EF4444;

  --bg-0: #050b18;
  --bg-1: #071226;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-2: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(66, 165, 255, 0.45);

  --text: #EAF1FF;
  --text-dim: #9FB0CE;
  --text-mute: #6B7B9C;

  --radius-sm: 12px;
  --radius: 18px;
  --radius-lg: 26px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 40px rgba(0, 118, 250, 0.35);

  --container: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font: "Vazirmatn", Tahoma, system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; width: 100%; }

body {
  font-family: var(--font);
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.8;
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
  position: relative;
  min-height: 100vh;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; }
[hidden] { display: none !important; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 20px; }

/* Aurora background */
.bg-aurora {
  position: fixed; inset: 0; z-index: -2;
  background:
    radial-gradient(60% 50% at 80% 0%, rgba(0, 118, 250, 0.22), transparent 60%),
    radial-gradient(50% 50% at 10% 20%, rgba(66, 165, 255, 0.16), transparent 55%),
    radial-gradient(60% 60% at 50% 100%, rgba(124, 58, 237, 0.12), transparent 60%),
    linear-gradient(180deg, var(--bg-1), var(--bg-0));
}
.bg-aurora::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 32px 32px; opacity: 0.5;
}

/* Glass utility */
.glass {
  background: var(--surface);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.grad-text {
  background: linear-gradient(120deg, var(--accent), var(--primary));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 700; font-size: 0.95rem;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s;
  white-space: nowrap; user-select: none;
}
.btn--primary {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  color: #fff; box-shadow: 0 10px 30px rgba(0, 118, 250, 0.4);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(0, 118, 250, 0.55); }
.btn--ghost { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); }
.btn--ghost:hover { transform: translateY(-2px); background: rgba(255,255,255,0.12); }
.btn--sm { padding: 9px 18px; font-size: 0.85rem; }
.btn--block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.link-btn { color: var(--accent); font-weight: 600; font-size: 0.88rem; }
.link-btn:disabled { color: var(--text-mute); cursor: not-allowed; }

/* ---------- Navbar ---------- */
.navbar {
  position: sticky; top: 0; z-index: 100; transition: all 0.3s var(--ease);
  padding: 14px 0;
}
.navbar.is-scrolled {
  background: rgba(7, 18, 38, 0.72);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.navbar__inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.navbar__nav { display: flex; gap: 28px; }
.navbar__link { color: var(--text-dim); font-weight: 600; font-size: 0.92rem; transition: color 0.2s; position: relative; }
.navbar__link:hover { color: var(--text); }
.navbar__link::after { content: ""; position: absolute; bottom: -6px; right: 0; width: 0; height: 2px; background: var(--accent); transition: width 0.25s var(--ease); }
.navbar__link:hover::after { width: 100%; }
.navbar__actions { display: flex; align-items: center; gap: 12px; }
.navbar__burger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.navbar__burger span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.3s; }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 14px; }
.hero__head { text-align: center; max-width: 760px; margin-inline: auto; margin-bottom: 40px; }
.hero__eyebrow {
  display: inline-block; padding: 6px 16px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--accent); font-size: 0.8rem; font-weight: 600; margin-bottom: 18px;
}
.hero__title { font-size: clamp(1.9rem, 5vw, 3.4rem); font-weight: 800; line-height: 1.35; letter-spacing: -0.5px; }
.hero__subtitle { margin-top: 18px; color: var(--text-dim); font-size: clamp(0.95rem, 2vw, 1.15rem); }

/* ---------- Carousel ---------- */
.carousel { position: relative; overflow: hidden; padding: 30px 0; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.carousel__track { display: flex; align-items: center; gap: 18px; transition: transform 0.7s var(--ease); will-change: transform; }
.carousel__item {
  flex: 0 0 auto; width: 120px; display: flex; flex-direction: column; align-items: center; gap: 12px;
  opacity: 0.4; transform: scale(0.78); transition: all 0.6s var(--ease); filter: grayscale(0.3);
}
.carousel__item.is-active { opacity: 1; transform: scale(1.12); filter: none; }
.carousel__logo {
  width: 96px; height: 96px; border-radius: 24px; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--border); overflow: hidden; transition: 0.5s var(--ease);
}
.carousel__item.is-active .carousel__logo {
  border-color: var(--tool-color, var(--border-strong));
  box-shadow: 0 0 0 4px rgba(66,165,255,0.18), var(--shadow-glow); /* fallback */
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--tool-color, #42A5FF) 38%, transparent),
    0 10px 44px color-mix(in srgb, var(--tool-color, #42A5FF) 50%, transparent);
}
.carousel__logo img { width: 70px; height: 70px; }
.carousel__label { font-size: 0.85rem; font-weight: 600; color: var(--text-dim); }
.carousel__item.is-active .carousel__label { color: var(--text); }
.carousel__progress { width: 180px; height: 4px; margin: 26px auto 0; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.carousel__bar { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 999px; }

/* Tool info — single line description under the carousel */
.tool-info {
  max-width: 620px; margin: 14px auto 0; padding: 0 16px; text-align: center;
  color: var(--text-dim); font-size: 0.98rem; line-height: 1.7;
  transition: opacity 0.35s var(--ease); min-height: 1.7em;
}
.tool-info.is-fading { opacity: 0; }

/* ---------- Sections ---------- */
.section-head { text-align: center; margin-bottom: 26px; }
.section-title { font-size: clamp(1.5rem, 4vw, 2.3rem); font-weight: 800; }
.section-sub { color: var(--text-dim); font-size: 1.05rem; }
.steps, .faq { padding: 70px 0; }
.plans { padding: 22px 0 64px; }

/* ---------- Plans ---------- */
.plans__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.plan-card {
  position: relative; padding: 28px 24px; border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--border); backdrop-filter: blur(16px);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s;
  cursor: pointer; display: flex; flex-direction: column; gap: 14px;
}
/* Tool-color tinted surface */
.plan-card { --tc: var(--tool-color, var(--accent)); }
.plan-card:hover {
  transform: translateY(-8px); box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--tc) 55%, transparent);
}
.plan-card.is-selected {
  border-color: var(--tc);
  box-shadow: 0 0 0 2px var(--tc), 0 10px 44px color-mix(in srgb, var(--tc) 40%, transparent);
}
.plan-card.is-selected { background: color-mix(in srgb, var(--tc) 8%, var(--surface)); }
.plan-card__check { position: absolute; top: 16px; left: 16px; width: 26px; height: 26px; border-radius: 50%; background: var(--tc); color: #fff; display: none; place-items: center; font-size: 0.8rem; }
.plan-card.is-selected .plan-card__check { display: grid; }
.plan-card__badge { position: absolute; top: -12px; right: 20px; padding: 5px 14px; border-radius: 999px; font-size: 0.75rem; font-weight: 700; background: var(--tc); color: #fff; box-shadow: 0 6px 16px color-mix(in srgb, var(--tc) 50%, transparent); }
.plan-card__tool { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; background: color-mix(in srgb, var(--tc) 14%, var(--surface-2)); border: 1px solid color-mix(in srgb, var(--tc) 35%, transparent); }
.plan-card__tool img { width: 32px; height: 32px; }
.plan-card__name { font-size: 1.25rem; font-weight: 800; }
.plan-card__duration { color: var(--text-dim); font-size: 0.9rem; }
.plan-card__price { display: flex; align-items: baseline; gap: 8px; margin-top: 6px; }
.plan-card__irt { font-size: 1.7rem; font-weight: 800; color: var(--text); }
.plan-card__irt-unit { color: var(--text-dim); font-size: 0.85rem; }
.plan-card__usdt { font-size: 0.85rem; color: var(--tc); }
.plan-card__cta { margin-top: auto; background: var(--tc); box-shadow: 0 10px 30px color-mix(in srgb, var(--tc) 42%, transparent); }
.plan-card__cta:hover { background: var(--tc); box-shadow: 0 16px 40px color-mix(in srgb, var(--tc) 55%, transparent); }

/* ---------- Ticker ---------- */
.ticker { padding: 30px 0; }
.ticker__card { padding: 26px; }
.ticker__head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.ticker__title { font-size: 1.1rem; font-weight: 800; }
.ticker__sub { color: var(--text-dim); font-size: 0.8rem; }
.ticker__live { margin-inline-start: auto; display: inline-flex; align-items: center; gap: 7px; font-size: 0.8rem; color: var(--success); }
.ticker__live .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 0 rgba(34,197,94,0.6); animation: pulse 1.8s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(34,197,94,0.5); } 70% { box-shadow: 0 0 0 8px rgba(34,197,94,0); } 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0); } }
.ticker__now { display: flex; align-items: baseline; justify-content: center; gap: 8px; padding: 8px 0 4px; }
.ticker__value { font-size: clamp(2rem, 7vw, 3rem); font-weight: 800; letter-spacing: 0.5px; }
.ticker__unit { font-size: 0.9rem; color: var(--text-mute); }
.ticker__change-line { display: flex; align-items: center; justify-content: center; gap: 8px; }
.ticker__change-label { color: var(--text-mute); font-size: 0.85rem; }
.ticker__change { font-size: 1.05rem; font-weight: 800; }
.ticker__change.is-up { color: var(--success); }
.ticker__change.is-down { color: var(--danger); }
.ticker__card { text-align: center; max-width: 460px; margin-inline: auto; }
.ticker__head { justify-content: center; }

/* ---------- Steps ---------- */
.steps__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 20px; }
.step-card { padding: 26px; border-radius: var(--radius); text-align: center; transition: transform 0.3s var(--ease); }
.step-card:hover { transform: translateY(-6px); }
.step-card__num { display: inline-grid; place-items: center; width: 50px; height: 50px; border-radius: 50%; background: linear-gradient(120deg, var(--primary), var(--accent)); color: #fff; font-weight: 800; font-size: 1.2rem; margin-bottom: 14px; }
.step-card__title { font-size: 1.05rem; font-weight: 700; }
.step-card__desc { color: var(--text-dim); font-size: 0.88rem; margin-top: 6px; }

/* ---------- FAQ ---------- */
.faq__list { max-width: 760px; margin-inline: auto; display: flex; flex-direction: column; gap: 14px; }
.faq__item { padding: 4px 22px; border-radius: var(--radius); }
.faq__q { padding: 18px 0; font-weight: 700; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq__q::after { content: "+"; color: var(--accent); font-size: 1.4rem; transition: transform 0.3s; }
.faq__item[open] .faq__q::after { transform: rotate(45deg); }
.faq__a { color: var(--text-dim); padding-bottom: 18px; }

/* ---------- Footer ---------- */
.footer { margin-top: 60px; border-top: 1px solid var(--border); padding-top: 50px; background: rgba(5,11,24,0.5); }
.footer__inner { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 18px; }
.footer__brand { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.footer__tagline { color: var(--text-dim); margin-top: 6px; max-width: 360px; font-size: 0.9rem; }
.footer__links { display: flex; flex-direction: column; gap: 12px; }
.footer__links a { color: var(--text-dim); font-size: 0.9rem; transition: color 0.2s; }
.footer__links a:hover { color: var(--text); }
.footer__bottom { margin-top: 36px; padding: 22px 20px; border-top: 1px solid var(--border); color: var(--text-mute); font-size: 0.82rem; text-align: center; }

/* ---------- Skeletons ---------- */
.skeleton, .skeleton-card { position: relative; overflow: hidden; background: var(--surface-2); }
.skeleton-card { min-height: 240px; border-radius: var(--radius-lg); }
.skeleton::after, .skeleton-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.07), transparent);
  transform: translateX(-100%); animation: shimmer 1.4s infinite;
}
@keyframes shimmer { 100% { transform: translateX(100%); } }

/* ---------- Toast ---------- */
.toast-root { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 2000; display: flex; flex-direction: column; gap: 10px; align-items: center; }
.toast {
  padding: 13px 22px; border-radius: 999px; font-weight: 600; font-size: 0.9rem;
  background: rgba(7,18,38,0.95); border: 1px solid var(--border); box-shadow: var(--shadow);
  animation: toastIn 0.4s var(--ease); display: flex; align-items: center; gap: 8px;
}
.toast--success { border-color: rgba(34,197,94,0.5); }
.toast--error { border-color: rgba(239,68,68,0.5); }
@keyframes toastIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- Success page ---------- */
.success { min-height: 70vh; display: grid; place-items: center; padding: 60px 0; }
.success__card { max-width: 460px; width: 100%; margin-inline: auto; padding: 44px 34px; text-align: center; }
.success__check { margin-bottom: 18px; display: flex; justify-content: center; }
.success__ring { stroke-dasharray: 226; stroke-dashoffset: 226; animation: ringDraw 0.9s var(--ease) forwards; }
.success__tick { stroke-dasharray: 60; stroke-dashoffset: 60; animation: tickDraw 0.5s 0.6s var(--ease) forwards; }
@keyframes ringDraw { to { stroke-dashoffset: 0; } }
@keyframes tickDraw { to { stroke-dashoffset: 0; } }
.success__title { font-size: 1.6rem; font-weight: 800; }
.success__msg { color: var(--text-dim); margin-top: 10px; }
.success__order { margin: 26px 0; padding: 16px; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--border); }
.success__order-label { display: block; color: var(--text-mute); font-size: 0.8rem; }
.success__order-number { font-size: 1.2rem; font-weight: 800; letter-spacing: 1px; }
.success__home { display: inline-block; margin-top: 16px; }

/* ---------- Error page ---------- */
.error-page { min-height: 80vh; display: grid; place-items: center; }
.error-page__card { padding: 50px; text-align: center; }
.error-page__code { font-size: 5rem; font-weight: 800; }
.error-page__msg { color: var(--text-dim); margin: 16px 0 26px; }

/* ---------- Fields ---------- */
.field { margin-bottom: 18px; }
.field__label { display: block; font-size: 0.88rem; font-weight: 600; margin-bottom: 8px; color: var(--text-dim); }
.field__error { display: block; color: var(--danger); font-size: 0.8rem; min-height: 1.1em; margin-top: 6px; }
.field__help { color: var(--text-dim); font-size: 0.82rem; margin-top: 8px; line-height: 1.9; }
.input {
  width: 100%; padding: 14px 16px; border-radius: var(--radius-sm);
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text); font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(66,165,255,0.18); }
.input::placeholder { color: var(--text-mute); }