:root {
  --bg: #f3f5f9;
  --bg2: #eaedf3;
  --card: #ffffff;
  --line: #dbe0ea;
  --text: #141a24;
  --muted: #5f687c;
  --accent: #1683c9;
  --accent2: #ff9a3c;
  --ok: #17a364;
  --neg: #d9475c;
  --shadow: 0 8px 24px rgba(30,40,70,.09);
  --radius: 18px;
}
[data-theme="dark"] {
  --bg: #0e1117;
  --bg2: #161a23;
  --card: #1a1f2a;
  --line: #2a3141;
  --text: #edf1f7;
  --muted: #8d96aa;
  --accent: #3aa6ee;
  --ok: #34c983;
  --neg: #ff6b7f;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}
* { box-sizing: border-box; }
html, body { margin: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -220px, color-mix(in srgb, var(--accent) 14%, transparent), transparent 70%), var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
}
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent); }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center { text-align: center; }

/* ---------- header ---------- */
.top {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px;
  max-width: 1180px; margin: 0 auto; padding: 14px 18px;
  padding-top: max(14px, env(safe-area-inset-top));
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 1.25rem; letter-spacing: .2px; }
.brand b { color: var(--accent); }
.top-actions { display: flex; gap: 8px; justify-self: end; }
.maker-logo {
  justify-self: center; display: block; background: #fff; border-radius: 12px; padding: 5px 12px;
  box-shadow: 0 0 0 1px var(--line); transition: transform .12s, box-shadow .12s; line-height: 0;
}
[data-theme="dark"] .maker-logo { box-shadow: 0 2px 10px rgba(0,0,0,.18); }
.maker-logo:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(79,195,247,.35); }
.maker-logo img { height: 36px; width: auto; display: block; }
.icon-btn {
  width: 38px; height: 38px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--card); display: grid; place-items: center; font-weight: 700;
}
.icon-btn:hover, .chip:hover { border-color: var(--accent); }
.chip {
  border: 1px solid var(--line); background: var(--bg2); border-radius: 10px; padding: 8px 12px;
  font-size: .92rem; line-height: 1.1; font-weight: 600;
}
.btn { border: 0; border-radius: 12px; padding: 9px 15px; background: var(--accent); color: #fff; font-weight: 600; white-space: nowrap; }
.btn.ghost { background: var(--bg2); color: var(--text); border: 1px solid var(--line); }
.btn:active, .chip:active { transform: scale(.97); }
.btn:disabled { opacity: .55; cursor: progress; }
.linkbtn { border: 0; background: none; color: var(--accent); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; padding: 4px; }

main { max-width: 1180px; margin: 0 auto; padding: 0 18px 20px; }
.intro { text-align: center; margin: 4px 0 16px; }
.intro h1 { margin: 0; font-size: 1.9rem; letter-spacing: -.5px; }
.intro p { margin: 4px 0 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.panel { padding: 16px 18px 18px; }
.panel h2 { margin: 0 0 6px; font-size: 1.08rem; }

/* ---------- drop ---------- */
.drop {
  display: flex; flex-direction: column; align-items: center; gap: 6px; text-align: center; cursor: pointer;
  padding: 30px 18px 22px; border: 2px dashed color-mix(in srgb, var(--accent) 45%, var(--line));
  transition: border-color .15s, background .15s, transform .12s;
}
.drop:hover, .drop.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 6%, var(--card)); }
.drop-ic { color: var(--accent); }
.drop-t { font-size: 1.2rem; }
.drop-btn { margin-top: 8px; padding: 11px 22px; font-size: 1.02rem; }
.privacy { margin-top: 10px; font-size: .86rem; color: var(--ok); font-weight: 600; }
.drop.compact { flex-direction: row; flex-wrap: wrap; justify-content: center; padding: 12px 14px; gap: 10px; }
.drop.compact .drop-ic svg { width: 28px; height: 28px; }
.drop.compact .drop-t { font-size: .98rem; }
.drop.compact .drop-btn { margin: 0; padding: 8px 14px; font-size: .92rem; }
.drop.compact .muted, .drop.compact .privacy { display: none; }
.drop.compact + .center { display: none; }

#dragMask {
  position: fixed; inset: 0; z-index: 80; display: none; place-items: center; pointer-events: none;
  background: color-mix(in srgb, var(--accent) 22%, transparent); backdrop-filter: blur(2px);
}
#dragMask div { background: var(--card); color: var(--accent); font-weight: 800; font-size: 1.4rem; padding: 22px 34px; border-radius: 18px; border: 3px dashed var(--accent); }
body.dragging #dragMask { display: grid; }
#busy { position: fixed; inset: 0; z-index: 90; display: none; place-items: center; align-content: center; gap: 12px; background: rgba(10,15,25,.45); color: #fff; font-weight: 600; }
#busy.show { display: grid; }
.spin { width: 42px; height: 42px; border-radius: 50%; border: 4px solid rgba(255,255,255,.3); border-top-color: #fff; animation: sp .8s linear infinite; }
@keyframes sp { to { transform: rotate(360deg); } }

/* ---------- viewer ---------- */
#viewer { margin-top: 16px; display: grid; gap: 12px; }
.doclist { display: flex; gap: 6px; overflow-x: auto; padding: 8px; -webkit-overflow-scrolling: touch; }
.doclist[hidden] { display: none; }
.doclist button {
  flex: 0 0 auto; text-align: left; border: 1px solid var(--line); background: var(--bg2); border-radius: 12px;
  padding: 7px 11px; max-width: 250px; display: grid; gap: 1px;
}
.doclist button b { font-size: .86rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.doclist button small { font-size: .74rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.doclist button.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.doclist button.on small { color: rgba(255,255,255,.85); }
.doclist button.err small { color: var(--neg); }

.sum { display: grid; grid-template-columns: 1.3fr 1.3fr 1fr; gap: 14px 18px; align-items: start; }
.sum .k { font-size: .74rem; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); font-weight: 700; }
.sum .v { font-weight: 700; font-size: 1.02rem; line-height: 1.3; word-break: break-word; }
.sum .v small { display: block; font-weight: 500; color: var(--muted); font-size: .82rem; }
.sum .tot .v { font-size: 1.6rem; color: var(--accent); letter-spacing: -.5px; font-variant-numeric: tabular-nums; }
.sum .meta { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px; }
.tag { padding: 4px 10px; border-radius: 99px; background: var(--bg2); border: 1px solid var(--line); font-size: .8rem; color: var(--muted); }
.tag b { color: var(--text); }
.tag.copy { cursor: pointer; }
.tag.copy:hover { border-color: var(--accent); }
.tag.warn { color: #9a5b00; background: #fff4e0; border-color: #f5d39a; }
[data-theme="dark"] .tag.warn { color: #ffcf7a; background: #3a2a10; border-color: #6b4c18; }
.att { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.att .btn { padding: 6px 11px; font-size: .85rem; }
.sum .errbox { grid-column: 1 / -1; color: var(--neg); font-weight: 600; }

.cta {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px;
  padding: 12px 14px; border-radius: 14px; text-decoration: none; color: var(--text);
  background: linear-gradient(135deg, color-mix(in srgb, var(--ok) 14%, var(--card)), color-mix(in srgb, var(--accent) 12%, var(--card)));
  border: 1px solid color-mix(in srgb, var(--ok) 40%, var(--line)); transition: transform .12s, box-shadow .12s;
}
.cta:hover { transform: translateY(-1px); box-shadow: 0 6px 18px color-mix(in srgb, var(--ok) 25%, transparent); }
.cta-ic { font-size: 1.8rem; }
.cta-tx b { display: block; font-size: .98rem; line-height: 1.3; }
.cta-tx span { display: block; font-size: .84rem; color: var(--muted); margin-top: 3px; }
.cta-go { background: var(--ok); color: #fff; font-weight: 700; border-radius: 10px; padding: 9px 12px; white-space: nowrap; font-size: .9rem; }

.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; padding: 10px; position: sticky; top: 6px; z-index: 20; }
.seg2 { display: inline-grid; grid-template-columns: 1fr 1fr; background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 3px; }
.seg2 button { border: 0; background: transparent; border-radius: 9px; padding: 7px 12px; font-weight: 600; font-size: .9rem; white-space: nowrap; }
.seg2 button.active { background: var(--card); color: var(--accent); box-shadow: 0 1px 4px rgba(0,0,0,.12); }
.seg2 button:disabled { opacity: .45; cursor: not-allowed; }
.tb-btns { display: flex; gap: 6px; flex-wrap: wrap; }
.src { margin: -4px 4px 0; }

.paper-wrap { position: relative; overflow: hidden; display: flex; justify-content: center; }
#paper {
  border: 0; background: #fff; display: block; transform-origin: top left; flex: 0 0 auto;
  box-shadow: 0 4px 24px rgba(20,30,60,.16); border-radius: 4px; min-height: 300px;
}
.paper-wrap.scaled { justify-content: flex-start; }

/* ---------- info ---------- */
.panels { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 22px; align-items: start; }
.steps { margin: 8px 0 4px; padding-left: 20px; display: grid; gap: 7px; line-height: 1.45; }
.feats { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.feats span { padding: 5px 10px; border-radius: 99px; background: color-mix(in srgb, var(--ok) 12%, var(--card)); color: var(--ok); font-weight: 600; font-size: .82rem; }
.faq details { border-bottom: 1px solid var(--line); padding: 10px 0; }
.faq details:last-child { border-bottom: 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 8px 0 2px; color: var(--muted); line-height: 1.5; font-size: .93rem; }

.foot { text-align: center; padding: 10px 18px 30px; color: var(--muted); font-size: .9rem; }
.foot p { margin: 4px 0; }
.foot .dev { color: var(--text); }
.foot .dev a { color: var(--accent); font-weight: 600; text-decoration: none; }
.foot .dev a:hover { text-decoration: underline; }

#toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0;
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 12px; font-size: .92rem;
  transition: .2s; pointer-events: none; z-index: 95; max-width: 90vw; text-align: center;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }
dialog { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); color: var(--text); max-width: 460px; width: calc(100% - 32px); box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(0,0,0,.5); }
dialog h3 { margin-top: 0; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .panels { grid-template-columns: minmax(0, 1fr); }
  .sum { grid-template-columns: 1fr 1fr; }
  .sum .tot { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .top { grid-template-columns: 1fr auto; row-gap: 10px; }
  .maker-logo { grid-column: 1 / -1; grid-row: 1; }
  .maker-logo img { height: 30px; }
  .brand { font-size: 1.1rem; white-space: nowrap; gap: 8px; }
  .brand img { width: 30px; height: 30px; }
  main { padding: 0 10px 16px; }
  .intro h1 { font-size: 1.45rem; }
  .panel { padding: 14px 13px 16px; }
  .sum { grid-template-columns: 1fr; }
  .cta { grid-template-columns: auto 1fr; }
  .cta-go { grid-column: 1 / -1; text-align: center; }
  .toolbar { position: static; }
  .seg2 { width: 100%; }
  .tb-btns { width: 100%; }
  .tb-btns .btn { flex: 1 1 auto; padding: 9px 10px; }
}

/* Sayfa yazdırılırsa yalnızca fatura (asıl yazdırma çerçevenin içinden yapılır) */
@media print {
  .top, .intro, .drop, .drop + .center, .doclist, .sum, .cta, .toolbar, .src, .panels, .foot, #toast { display: none !important; }
  body { background: #fff; }
  #paper { box-shadow: none; }
}