/* ===== xvoip landing — design tokens ===== */
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-var.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --color-primary: #1e1b4b;
  --color-secondary: #312e81;
  --color-accent: #f97316;
  --color-accent-hover: #fb8c3c;
  --color-bg: #0f0f23;
  --color-surface: #181832;
  --color-surface-2: #1f1f3d;
  --color-fg: #f8fafc;
  --color-fg-muted: #a5b4d4;
  --color-muted: #27273b;
  --color-border: #2e2e52;
  --color-border-strong: #4338ca;
  --color-success: #34d399;
  --color-danger: #f87171;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.04) inset;
  --transition: 180ms ease;
  --container: 1120px;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: 'Vazirmatn', Tahoma, 'Segoe UI', sans-serif;
  background: var(--color-bg);
  color: var(--color-fg);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container { max-width: var(--container); margin-inline: auto; padding-inline: 24px; }

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }
.num { font-feature-settings: 'tnum'; direction: ltr; unicode-bidi: embed; }

/* ===== buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 26px;
  border-radius: var(--radius-sm); border: 1px solid transparent;
  font-family: inherit; font-size: 16px; font-weight: 600;
  cursor: pointer; transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--color-accent); outline-offset: 2px;
}
.btn-primary { background: var(--color-accent); color: #1a1005; }
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-ghost { background: transparent; color: var(--color-fg); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-border-strong); background: var(--color-surface); }
.btn[disabled] { opacity: 0.5; cursor: default; }

/* ===== header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15, 15, 35, 0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; }
.logo .x { color: var(--color-accent); }
.main-nav { display: flex; gap: 28px; font-size: 15px; color: var(--color-fg-muted); }
.main-nav a { padding: 8px 2px; transition: color var(--transition); }
.main-nav a:hover { color: var(--color-fg); }
@media (max-width: 767px) { .main-nav { display: none; } }

/* ===== hero ===== */
.hero { padding: 88px 0 72px; position: relative; }
.hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(600px 300px at 80% 0%, rgba(67, 56, 202, 0.25), transparent 70%),
    radial-gradient(500px 260px at 15% 15%, rgba(249, 115, 22, 0.08), transparent 70%);
}
.hero .container { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 1023px) { .hero .container { grid-template-columns: 1fr; } }

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  color: var(--color-fg-muted); font-size: 13.5px; font-weight: 500;
  padding: 6px 14px; border-radius: 100px; margin-bottom: 22px;
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-accent); }

.hero h1 { font-size: clamp(30px, 4.4vw, 46px); font-weight: 800; line-height: 1.5; margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: var(--color-accent); }
.hero .lead { font-size: 18px; color: var(--color-fg-muted); margin-bottom: 30px; max-width: 34em; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }

/* hero mock dashboard */
.mock {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow-card);
}
.mock-titlebar { display: flex; align-items: center; gap: 8px; padding-bottom: 14px; border-bottom: 1px solid var(--color-border); margin-bottom: 16px; }
.mock-titlebar .dots { display: flex; gap: 6px; }
.mock-titlebar .dots span { width: 10px; height: 10px; border-radius: 50%; background: var(--color-muted); }
.mock-titlebar .title { font-size: 13px; color: var(--color-fg-muted); }
.kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 14px; }
.kpi { background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 12px 14px; }
.kpi .label { font-size: 12px; color: var(--color-fg-muted); }
.kpi .value { font-size: 22px; font-weight: 800; line-height: 1.4; }
.kpi .delta { font-size: 12px; font-weight: 600; }
.kpi .delta.up { color: var(--color-success); }
.kpi .delta.down { color: var(--color-danger); }
.insight-card {
  display: flex; gap: 12px; align-items: flex-start;
  background: rgba(249, 115, 22, 0.07); border: 1px solid rgba(249, 115, 22, 0.35);
  border-radius: var(--radius-sm); padding: 14px;
}
.insight-card .icon { flex: 0 0 auto; color: var(--color-accent); margin-top: 3px; }
.insight-card p { font-size: 13.5px; line-height: 1.9; color: var(--color-fg); }
.insight-card p strong { color: var(--color-accent); }

/* ===== PBX strip ===== */
.pbx-strip { border-block: 1px solid var(--color-border); background: var(--color-surface); }
.pbx-strip .container { display: flex; align-items: center; justify-content: center; gap: 14px 34px; flex-wrap: wrap; padding-block: 20px; }
.pbx-strip .caption { font-size: 14px; color: var(--color-fg-muted); }
.pbx-strip .name { font-size: 16px; font-weight: 700; color: var(--color-fg-muted); opacity: 0.85; }

/* ===== sections ===== */
section { padding: 84px 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head .kicker { color: var(--color-accent); font-weight: 700; font-size: 14.5px; margin-bottom: 10px; }
.section-head h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; line-height: 1.6; margin-bottom: 12px; }
.section-head p { color: var(--color-fg-muted); font-size: 16.5px; }
.section-head.center { margin-inline: auto; text-align: center; }

/* problem cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 1023px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 599px) { .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-card);
  transition: border-color var(--transition);
}
.card:hover { border-color: var(--color-border-strong); }
.card .icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-muted); color: var(--color-accent); margin-bottom: 18px;
}
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.card p { font-size: 15px; color: var(--color-fg-muted); }

/* comparison */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: stretch; }
@media (max-width: 1023px) { .compare { grid-template-columns: 1fr; } }
.compare-card { border-radius: var(--radius); padding: 30px; border: 1px solid var(--color-border); background: var(--color-surface); }
.compare-card.xvoip { border-color: rgba(249, 115, 22, 0.45); background: linear-gradient(180deg, rgba(249, 115, 22, 0.06), transparent 60%), var(--color-surface); }
.compare-card .who { font-size: 13.5px; font-weight: 700; color: var(--color-fg-muted); margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.compare-card.xvoip .who { color: var(--color-accent); }
.compare-card blockquote { font-size: 17.5px; line-height: 2; font-weight: 500; }
.compare-card.xvoip blockquote strong { color: var(--color-accent); }

/* how it works */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
@media (max-width: 1023px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 599px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 26px; }
.step .n {
  width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-secondary); color: #fff; font-weight: 800; font-size: 16px; margin-bottom: 16px;
}
.step h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--color-fg-muted); }

/* audience */
.audience { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 767px) { .audience { grid-template-columns: 1fr; } }
.audience .card ul { list-style: none; margin-top: 14px; }
.audience .card li { display: flex; align-items: flex-start; gap: 10px; padding-block: 6px; font-size: 15px; color: var(--color-fg-muted); }
.audience .card li svg { flex: 0 0 auto; color: var(--color-success); margin-top: 5px; }

/* ===== form ===== */
.signup { background: var(--color-surface); border-block: 1px solid var(--color-border); }
.signup .container { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
@media (max-width: 1023px) { .signup .container { grid-template-columns: 1fr; } }

.form-card { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 32px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14.5px; font-weight: 600; margin-bottom: 8px; }
.field label .req { color: var(--color-accent); }
.field input, .field select, .field textarea {
  width: 100%; min-height: 48px; padding: 10px 14px;
  background: var(--color-surface-2); color: var(--color-fg);
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 16px;
  transition: border-color var(--transition);
}
.field textarea { min-height: 100px; resize: vertical; }
.field input:hover, .field select:hover, .field textarea:hover { border-color: var(--color-border-strong); }
.field .hint { font-size: 12.5px; color: var(--color-fg-muted); margin-top: 6px; }
.field .error { display: none; font-size: 13px; color: var(--color-danger); margin-top: 6px; }
.field.invalid input, .field.invalid select { border-color: var(--color-danger); }
.field.invalid .error { display: block; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 599px) { .form-row { grid-template-columns: 1fr; } }
.form-note { font-size: 13px; color: var(--color-fg-muted); margin-top: 14px; }
.form-status { display: none; border-radius: var(--radius-sm); padding: 14px 16px; margin-top: 16px; font-size: 14.5px; font-weight: 600; }
.form-status.ok { display: flex; gap: 10px; align-items: center; background: rgba(52, 211, 153, 0.1); border: 1px solid rgba(52, 211, 153, 0.4); color: var(--color-success); }
.form-status.err { display: flex; gap: 10px; align-items: center; background: rgba(248, 113, 113, 0.08); border: 1px solid rgba(248, 113, 113, 0.4); color: var(--color-danger); }
.hp-field { position: absolute; right: -9999px; opacity: 0; pointer-events: none; }

/* ===== footer ===== */
.site-footer { padding: 44px 0; }
.site-footer .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer p { font-size: 14px; color: var(--color-fg-muted); }