/* ===== آوا — سیستم طراحی (Accessible & Ethical • سلامت) ===== */
@font-face {
  font-family: 'Vazirmatn';
  src: url('/assets/fonts/Vazirmatn.woff2') format('woff2-variations'),
       url('/assets/fonts/Vazirmatn.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --primary: #0891b2; --primary-600: #0e7490; --primary-700: #155e75;
  --secondary: #22d3ee; --accent: #059669; --accent-600: #047857;
  --bg: #f1fbfd; --bg-2: #e6f6fa; --surface: #ffffff; --surface-2: #f7fdfe;
  --fg: #0c3a47; --fg-strong: #062b36; --muted: #5b7a85; --faint: #8aa6af;
  --border: #d2ecf2; --border-2: #bfe4ec;
  --danger: #dc2626; --warn: #d97706; --ok: #059669; --info: #0891b2;
  --ring: rgba(8,145,178,.38);
  --shadow-sm: 0 1px 2px rgba(6,43,54,.06), 0 1px 3px rgba(6,43,54,.05);
  --shadow: 0 4px 14px rgba(6,43,54,.08), 0 2px 6px rgba(6,43,54,.05);
  --shadow-lg: 0 18px 48px rgba(6,43,54,.16), 0 8px 20px rgba(6,43,54,.08);
  --grad-hero: radial-gradient(1200px 600px at 80% -10%, #0e7490 0%, #0b4a5e 45%, #07303d 100%);
  --grad-accent: linear-gradient(135deg, #0891b2, #06b6d4 60%, #10b981);
  --r-sm: 10px; --r: 16px; --r-lg: 22px; --r-xl: 30px;
  --maxw: 1180px;
  --fs-step: clamp(2.2rem, 1.2rem + 3.6vw, 4rem);
  --space: 8px;
  color-scheme: light;
}
[data-theme="dark"] {
  --primary: #22d3ee; --primary-600: #38bdf8; --primary-700: #67e8f9;
  --secondary: #67e8f9; --accent: #34d399; --accent-600: #6ee7b7;
  --bg: #061b22; --bg-2: #07232c; --surface: #0c2e39; --surface-2: #0e3744;
  --fg: #e6f7fb; --fg-strong: #f4fdff; --muted: #9fc3ce; --faint: #6f97a3;
  --border: #16414f; --border-2: #1d5161;
  --ring: rgba(34,211,238,.45);
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow: 0 6px 20px rgba(0,0,0,.45);
  --shadow-lg: 0 22px 60px rgba(0,0,0,.6);
  --grad-hero: radial-gradient(1200px 600px at 80% -10%, #0e4a5c 0%, #08323f 45%, #041d25 100%);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; font-family: 'Vazirmatn', system-ui, 'Segoe UI', Tahoma, sans-serif;
  background: var(--bg); color: var(--fg); line-height: 1.75; font-size: 16px;
  font-feature-settings: "ss01"; -webkit-font-smoothing: antialiased;
}
.num, .tnum { font-variant-numeric: tabular-nums; letter-spacing: 0; }
a { color: var(--primary-600); text-decoration: none; }
img, svg { max-width: 100%; }
h1, h2, h3, h4 { color: var(--fg-strong); line-height: 1.3; margin: 0 0 .5em; font-weight: 700; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; border-radius: 6px; }
::selection { background: var(--secondary); color: #042b36; }

.container { max-width: var(--maxw); margin-inline: auto; padding-inline: 22px; }
.section { padding: clamp(48px, 8vw, 110px) 0; }
.center { text-align: center; }
.muted { color: var(--muted); }
.eyebrow { color: var(--primary-600); font-weight: 700; letter-spacing: .04em; font-size: .82rem; text-transform: none; display: inline-flex; align-items: center; gap: 8px; }
.grid { display: grid; gap: 22px; }
.flex { display: flex; gap: 14px; align-items: center; }
.wrap { flex-wrap: wrap; }
.between { justify-content: space-between; }
.hide { display: none !important; }

/* ===== buttons ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: inherit; font-weight: 600; font-size: .98rem; line-height: 1; cursor: pointer;
  padding: 14px 22px; border-radius: 999px; border: 1px solid transparent; min-height: 46px;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, color .2s; white-space: nowrap; }
.btn:active { transform: translateY(1px) scale(.99); }
.btn-primary { background: var(--grad-accent); color: #fff; box-shadow: 0 8px 22px rgba(8,145,178,.32); }
.btn-primary:hover { box-shadow: 0 12px 30px rgba(8,145,178,.42); transform: translateY(-1px); }
[data-theme="dark"] .btn-primary { color: #04222b; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-600); }
.btn-ghost { background: transparent; color: var(--fg); border-color: var(--border-2); }
.btn-ghost:hover { background: var(--surface-2); border-color: var(--primary); }
.btn-light { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.28); backdrop-filter: blur(6px); }
.btn-light:hover { background: rgba(255,255,255,.24); }
.btn-sm { padding: 9px 15px; min-height: 38px; font-size: .86rem; }
.btn-danger { background: var(--danger); color: #fff; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ===== cards ===== */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 26px; box-shadow: var(--shadow-sm); transition: box-shadow .25s, transform .25s, border-color .25s; }
.card.hover:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--border-2); }
.glass { background: color-mix(in srgb, var(--surface) 72%, transparent); backdrop-filter: blur(14px) saturate(1.2); border: 1px solid var(--border-2); }
.pill { display: inline-flex; align-items: center; gap: 7px; padding: 6px 13px; border-radius: 999px; font-size: .8rem; font-weight: 600; background: var(--bg-2); color: var(--primary-700); border: 1px solid var(--border-2); }
[data-theme="dark"] .pill { color: var(--secondary); }
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 11px; border-radius: 999px; font-size: .76rem; font-weight: 600; }
.badge.ok { background: color-mix(in srgb, var(--ok) 16%, transparent); color: var(--ok); }
.badge.warn { background: color-mix(in srgb, var(--warn) 16%, transparent); color: var(--warn); }
.badge.danger { background: color-mix(in srgb, var(--danger) 16%, transparent); color: var(--danger); }
.badge.info { background: color-mix(in srgb, var(--info) 16%, transparent); color: var(--info); }
.badge.muted { background: var(--bg-2); color: var(--muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }

.icon-tile { width: 54px; height: 54px; border-radius: 16px; display: grid; place-items: center; background: var(--grad-accent); color: #fff; flex: none; }
.icon-tile.soft { background: var(--bg-2); color: var(--primary-600); border: 1px solid var(--border-2); }

/* ===== header ===== */
.nav { position: sticky; top: 0; z-index: 100; background: color-mix(in srgb, var(--bg) 80%, transparent); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); }
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 70px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; color: var(--fg-strong); font-size: 1.2rem; }
.brand .logo { width: 40px; height: 40px; }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a { padding: 9px 14px; border-radius: 10px; color: var(--fg); font-weight: 500; font-size: .95rem; transition: background .15s, color .15s; }
.nav-links a:hover { background: var(--surface-2); color: var(--primary-600); }
.iconbtn { width: 42px; height: 42px; border-radius: 12px; border: 1px solid var(--border-2); background: var(--surface); color: var(--fg); display: grid; place-items: center; cursor: pointer; transition: .15s; }
.iconbtn:hover { border-color: var(--primary); color: var(--primary-600); }

/* ===== hero ===== */
.hero { position: relative; background: var(--grad-hero); color: #eaffff; overflow: hidden; }
.hero::after { content: ""; position: absolute; inset: 0; background: radial-gradient(700px 340px at 12% 110%, rgba(16,185,129,.22), transparent 70%); pointer-events: none; }
.hero .container { position: relative; z-index: 2; padding-top: clamp(46px, 7vw, 84px); padding-bottom: clamp(46px, 7vw, 84px); }
.hero h1 { color: #fff; font-size: var(--fs-step); font-weight: 800; letter-spacing: -.01em; margin-bottom: .35em; }
.hero .lead { color: #cdeef5; font-size: clamp(1.05rem, .9rem + .6vw, 1.3rem); max-width: 640px; }
.hero .pill { background: rgba(255,255,255,.12); color: #d6f7ff; border-color: rgba(255,255,255,.25); }
.ava-letters { display: inline-flex; gap: 5px; font-weight: 800; }
.ava-letters b { color: #5eead4; }

/* grid backdrop */
.grid-bg { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px); background-size: 42px 42px; mask-image: radial-gradient(circle at 70% 20%, #000, transparent 75%); opacity: .5; }

/* ===== feature / steps ===== */
.feature { display: flex; gap: 16px; align-items: flex-start; }
.feature h3 { margin-bottom: .25em; font-size: 1.12rem; }
.feature p { color: var(--muted); margin: 0; font-size: .96rem; }
.steps { counter-reset: s; }
.step { position: relative; padding-inline-start: 60px; }
.step::before { counter-increment: s; content: counter(s, persian); position: absolute; inset-inline-start: 0; top: 0; width: 42px; height: 42px; border-radius: 12px; background: var(--grad-accent); color: #fff; display: grid; place-items: center; font-weight: 800; }

/* ===== flow diagram ===== */
.flow { display: flex; align-items: stretch; gap: 0; flex-wrap: wrap; }
.flow-node { flex: 1 1 150px; min-width: 140px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.16); border-radius: 16px; padding: 16px 14px; text-align: center; color: #eaffff; position: relative; }
.flow-node .ft { font-weight: 700; font-size: .95rem; margin-top: 8px; }
.flow-node .fs { font-size: .78rem; color: #b9e4ee; }
.flow-node svg { color: #5eead4; }
.flow-arrow { display: grid; place-items: center; color: #5eead4; padding: 0 4px; }

/* ===== KPI / stat ===== */
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 18px 20px; box-shadow: var(--shadow-sm); }
.kpi .k-val { font-size: 2rem; font-weight: 800; color: var(--fg-strong); line-height: 1.1; }
.kpi .k-lab { color: var(--muted); font-size: .85rem; margin-top: 4px; }
.kpi .k-ico { width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; }

/* ===== forms ===== */
label { font-weight: 600; font-size: .9rem; color: var(--fg); display: block; margin-bottom: 6px; }
.req::after { content: " *"; color: var(--danger); }
input, select, textarea { width: 100%; font-family: inherit; font-size: .96rem; color: var(--fg); background: var(--surface); border: 1px solid var(--border-2); border-radius: var(--r-sm); padding: 11px 13px; min-height: 44px; transition: border-color .15s, box-shadow .15s; }
textarea { min-height: 86px; line-height: 1.7; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px var(--ring); }
.help { color: var(--faint); font-size: .8rem; margin-top: 5px; }
.field { margin-bottom: 16px; }
.switch { position: relative; width: 46px; height: 26px; flex: none; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch span { position: absolute; inset: 0; background: var(--border-2); border-radius: 999px; transition: .2s; cursor: pointer; }
.switch span::before { content: ""; position: absolute; width: 20px; height: 20px; border-radius: 50%; background: #fff; top: 3px; right: 3px; transition: .2s; box-shadow: var(--shadow-sm); }
.switch input:checked + span { background: var(--accent); }
.switch input:checked + span::before { transform: translateX(-20px); }

/* ===== tables ===== */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--r); }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: right; padding: 11px 14px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: var(--surface-2); color: var(--muted); font-weight: 700; font-size: .8rem; position: sticky; top: 0; }
tbody tr:hover { background: var(--surface-2); }
tbody tr:last-child td { border-bottom: none; }

/* ===== footer ===== */
.footer { background: var(--surface); border-top: 1px solid var(--border); padding: 40px 0 28px; color: var(--muted); }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--primary-600); }

/* ===== toast ===== */
#toasts { position: fixed; bottom: 22px; inset-inline-start: 22px; z-index: 2000; display: flex; flex-direction: column; gap: 10px; }
.toast { background: var(--surface); border: 1px solid var(--border-2); border-inline-start: 4px solid var(--primary); border-radius: 12px; padding: 12px 16px; box-shadow: var(--shadow-lg); font-size: .9rem; animation: slideup .25s ease; max-width: 360px; }
.toast.ok { border-inline-start-color: var(--ok); }
.toast.err { border-inline-start-color: var(--danger); }

/* ===== reveal animation ===== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }
@keyframes slideup { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .45; } }
.live-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 60%, transparent); animation: ring 1.8s infinite; }
@keyframes ring { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 55%, transparent); } 70% { box-shadow: 0 0 0 9px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 860px) {
  .nav-links .hide-sm { display: none; }
  .flow-arrow { transform: rotate(90deg); }
  .flow-node { flex-basis: 100%; }
}