/* Layout: the page follows the company's own document trail. Teklif → sipariş → irsaliye → fatura → tahsilat
   runs as a connected track in the hero, then each band below opens one stage of that flow. */
:root {
  --navy: #0b3a66;
  --teal: #0e9f9a;
  --mint: #7cf2dd;
  --ink: #0b2a4a;
  --muted: #536479;
  --paper: #f6f8fb;
  --surface: #ffffff;
  --line: #dbe3ed;
  --band: #eaf0f6;
  --accent: #0b7f7b;
  --accent-ink: #ffffff;
  --cta: #0b3a66;
  --cta-ink: #ffffff;
  --hero-bg: #0b2a4a;
  --hero-ink: #e8f0f7;
  --hero-muted: #9fb3c8;
  --hero-card: #10365c;
  --hero-line: #24507a;
  --ok: #0f8a5f;
  --ok-bg: #e3f6ee;
  --wait: #a25b00;
  --wait-bg: #fff1dc;

  --display: 'Sora', 'Segoe UI', system-ui, sans-serif;
  --body: 'IBM Plex Sans', 'Segoe UI', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --step-0: 1rem;
  --step-1: 1.125rem;
  --step-2: 1.4rem;
  --step-3: clamp(1.6rem, 1.2rem + 1.6vw, 2.2rem);
  --step-4: clamp(2.1rem, 1.3rem + 3.4vw, 3.6rem);
  --radius: 14px;
  --wrap: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #e6edf5; --muted: #9aabbf; --paper: #0d1724; --surface: #132235; --line: #253a54; --band: #101e2f;
    --accent: #5fe0cb; --accent-ink: #062520; --cta: #7cf2dd; --cta-ink: #062520;
    --hero-bg: #08131f; --hero-card: #0f2337; --hero-line: #22405f;
    --ok: #5ad6a3; --ok-bg: #12352a; --wait: #f2b562; --wait-bg: #3a2a12;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --ink: #e6edf5; --muted: #9aabbf; --paper: #0d1724; --surface: #132235; --line: #253a54; --band: #101e2f;
  --accent: #5fe0cb; --accent-ink: #062520; --cta: #7cf2dd; --cta-ink: #062520;
  --hero-bg: #08131f; --hero-card: #0f2337; --hero-line: #22405f;
  --ok: #5ad6a3; --ok-bg: #12352a; --wait: #f2b562; --wait-bg: #3a2a12;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { background: var(--paper); color: var(--ink); font-family: var(--body); font-size: var(--step-0); line-height: 1.6; }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--hero-bg); }
h1, h2, h3 { font-family: var(--display); line-height: 1.15; text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: inherit; }
code, .mono { font-family: var(--mono); font-size: 0.88em; }
:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; border-radius: 6px; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.eyebrow { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }

/* Header + hero share the dark ground */
.top { background: var(--hero-bg); color: var(--hero-ink); }
.nav { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: var(--hero-bg); border-bottom: 1px solid var(--hero-line); }
.nav .wrap { display: flex; align-items: center; gap: 24px; padding-block: 14px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--display); font-weight: 700; font-size: 1.25rem; color: var(--hero-ink); }
.brand svg { width: 32px; height: 32px; flex: none; }
.nav ul { display: flex; gap: 22px; list-style: none; margin: 0 0 0 auto; padding: 0; font-size: 0.95rem; }
.nav ul a { text-decoration: none; color: var(--hero-muted); }
.nav ul a:hover { color: var(--hero-ink); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 20px; border-radius: 999px; font-weight: 600; text-decoration: none; font-size: 0.97rem; border: 1px solid transparent; transition: transform .15s ease, background .15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn-mint { background: #7cf2dd; color: #062520; }
.btn-ghost { border-color: var(--hero-line); color: var(--hero-ink); }
.btn-ghost:hover { border-color: #7cf2dd; }
.btn-cta { background: var(--cta); color: var(--cta-ink); }

.hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 56px; align-items: center; padding-block: 72px 88px; }
.hero h1 { font-size: var(--step-4); font-weight: 700; }
.hero h1 em { font-style: normal; color: #7cf2dd; }
.hero .lead { margin-top: 20px; font-size: var(--step-1); color: var(--hero-muted); max-width: 34rem; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero .facts { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 36px; font-size: 0.9rem; color: var(--hero-muted); list-style: none; padding: 0; }
.hero .facts li::before { content: "✓ "; color: #7cf2dd; }

/* Document trail */
.trail { background: var(--hero-card); border: 1px solid var(--hero-line); border-radius: 18px; padding: 24px; min-width: 0; }
.trail-head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 0.85rem; color: var(--hero-muted); }
.trail-head strong { color: var(--hero-ink); font-weight: 600; }
.trail ol { list-style: none; margin: 20px 0 0; padding: 0; position: relative; display: grid; gap: 10px; }
.trail ol::before { content: ""; position: absolute; left: 15px; top: 18px; bottom: 18px; width: 4px; border-radius: 4px; background: var(--hero-line); }
.trail ol::after { content: ""; position: absolute; left: 15px; top: 18px; width: 4px; border-radius: 4px; background: linear-gradient(#0e9f9a, #7cf2dd); height: calc(100% - 36px); transform-origin: top; animation: flow 2.4s cubic-bezier(.4,0,.2,1) both; }
@keyframes flow { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.step { position: relative; display: grid; grid-template-columns: 34px minmax(0, 1fr) auto; gap: 14px; align-items: center; }
.dot { width: 34px; height: 34px; border-radius: 50%; background: var(--hero-bg); border: 2px solid #0e9f9a; display: grid; place-items: center; z-index: 1; font-family: var(--mono); font-size: 0.7rem; color: #7cf2dd; }
.step.last .dot { border-color: #7cf2dd; background: #7cf2dd; color: #062520; }
.doc { background: rgba(255,255,255,0.04); border: 1px solid var(--hero-line); border-radius: 10px; padding: 10px 14px; min-width: 0; }
.doc .no { font-family: var(--mono); font-size: 0.86rem; color: var(--hero-ink); overflow-wrap: anywhere; }
.doc .what { font-size: 0.82rem; color: var(--hero-muted); }
.amt { font-family: var(--mono); font-size: 0.85rem; color: var(--hero-ink); font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.trail-foot { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--hero-line); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; font-size: 0.8rem; color: var(--hero-muted); }
.trail-foot b { display: block; font-family: var(--mono); font-weight: 500; font-size: 0.95rem; color: var(--hero-ink); font-variant-numeric: tabular-nums; }

/* Sections */
section { padding-block: 88px; }
.band { background: var(--band); }
.sec-head { max-width: 44rem; display: grid; gap: 12px; margin-bottom: 44px; }
.sec-head h2 { font-size: var(--step-3); }
.sec-head p { color: var(--muted); font-size: var(--step-1); }

/* One record, many effects */
.chain { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 40px; align-items: start; }
.action-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.action-card .label { font-size: 0.82rem; color: var(--muted); }
.action-card .big { font-family: var(--display); font-size: var(--step-2); font-weight: 600; margin-top: 4px; }
.action-card .meta { margin-top: 14px; display: grid; gap: 6px; font-size: 0.92rem; }
.action-card .meta div { display: flex; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); padding-bottom: 6px; }
.action-card .meta span:last-child { font-family: var(--mono); font-size: 0.85rem; }
.effects { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.effects li { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.effects li:last-child { border-bottom: 0; }
.effects .mod { font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); padding-top: 2px; }

/* Modules by stage */
.stages { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.stage { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; display: grid; gap: 12px; align-content: start; min-width: 0; }
.stage .tag { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.stage h3 { font-size: var(--step-1); font-weight: 600; }
.stage ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 0.94rem; display: grid; gap: 4px; }
.stage .ex { margin-top: 4px; font-size: 0.85rem; background: var(--band); border-radius: 8px; padding: 10px 12px; color: var(--ink); }

/* Details */
.details { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 56px; }
.detail { padding-block: 26px; border-top: 1px solid var(--line); display: grid; gap: 8px; min-width: 0; }
.detail h3 { font-size: var(--step-1); font-weight: 600; }
.detail p { color: var(--muted); }
.detail .sample { font-family: var(--mono); font-size: 0.86rem; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; overflow-x: auto; white-space: nowrap; }

/* Security */
.secure { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.secure div { display: grid; gap: 6px; align-content: start; }
.secure h3 { font-size: 1.02rem; font-weight: 600; }
.secure p { color: var(--muted); font-size: 0.94rem; }
.mask { font-family: var(--mono); color: var(--ink); }

/* Packages */
.plans { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; align-items: stretch; }
.plan { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.plan.pick { border: 2px solid var(--teal); }
.plan .badge { align-self: flex-start; font-size: 0.75rem; font-weight: 600; padding: 3px 10px; border-radius: 999px; background: var(--ok-bg); color: var(--ok); }
.plan h3 { font-size: var(--step-2); }
.plan .who { color: var(--muted); font-size: 0.94rem; }
.plan .limits { display: flex; gap: 22px; font-size: 0.85rem; color: var(--muted); }
.plan .limits b { display: block; font-family: var(--mono); font-size: 1.15rem; color: var(--ink); font-weight: 500; font-variant-numeric: tabular-nums; }
.plan ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; font-size: 0.94rem; }
.plan li::before { content: "✓"; color: var(--teal); margin-right: 8px; font-weight: 700; }
.plan .spacer { flex: 1; }
.plan-note { margin-top: 20px; color: var(--muted); font-size: 0.92rem; max-width: 50rem; }

/* Closing */
.closing { background: var(--hero-bg); color: var(--hero-ink); }
.closing .wrap { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 40px; align-items: center; }
.closing h2 { font-size: var(--step-3); }
.closing p { color: var(--hero-muted); margin-top: 12px; }
.closing .actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }
footer { background: var(--hero-bg); color: var(--hero-muted); border-top: 1px solid var(--hero-line); font-size: 0.85rem; }
footer .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-block: 22px; }

@media (max-width: 960px) {
  .hero .wrap, .chain, .closing .wrap { grid-template-columns: minmax(0, 1fr); }
  .stages, .plans { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .secure { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .closing .actions { justify-content: flex-start; }
  .nav ul { display: none; }
  .nav .btn-mint { margin-left: auto; }
  .nav .btn-ghost { display: none; }
}
@media (max-width: 640px) {
  section { padding-block: 60px; }
  .hero .wrap { padding-block: 44px 60px; gap: 36px; }
  .stages, .plans, .details, .secure { grid-template-columns: minmax(0, 1fr); }
  .effects li { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .step { grid-template-columns: 30px minmax(0, 1fr); }
  .dot { width: 30px; height: 30px; }
  .trail ol::before, .trail ol::after { left: 13px; }
  .amt { grid-column: 2; text-align: left; margin-top: -6px; }
  .trail-foot { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  .trail ol::after { animation: none; }
  .btn { transition: none; }
  .btn:hover { transform: none; }
}