/* EduFabTech — calc.css (bilimsel hesap makinesi; tasarım turu 15 Eki 2026: cihaz görünümü, iki tuş bloğu, segmentli sekmeler).
   Önek calc-. Telefon: tek sütun, tuşlar alt alta iki blok. */
.calc-head { max-width: 72ch; }
.calc-guest { font-size: 14px; margin: -12px 0 18px; }

.calc { display: grid; grid-template-columns: minmax(0, 680px) 340px; gap: 20px; align-items: start; }
.calc-main { min-width: 0; }

/* ── Ekran ── */
.calc-display {
  border: 1px solid var(--border); border-radius: 18px; overflow: hidden;
  background: linear-gradient(180deg, #0d1a16 0%, #0a1210 100%);
  box-shadow: 0 1px 0 rgba(255,255,255,.04) inset, 0 14px 34px rgba(0,0,0,.35);
}
.calc-screen { padding: 16px 20px 10px; }
.calc-input {
  width: 100%; font-family: var(--mono); font-size: 18px; line-height: 1.5; padding: 2px 0; border: 0; background: transparent;
  color: var(--text-2); outline: none; caret-color: var(--brand);
}
.calc-input::placeholder { color: #3f5a51; }
.calc-input:focus { color: var(--text); }
.calc-prev { font-family: var(--mono); font-size: 13px; color: #5e8577; min-height: 18px; text-align: right; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.calc-out {
  font-family: var(--mono); font-size: 40px; font-weight: 600; letter-spacing: -.01em; min-height: 56px; padding: 2px 0 4px;
  text-align: right; word-break: break-all; color: #e9fff5; text-shadow: 0 0 24px rgba(67,212,155,.18);
}
.calc-out.is-err { font-size: 15px; font-weight: 500; color: var(--err); text-align: left; text-shadow: none; min-height: 32px; padding-top: 14px; }
.calc-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 14px 12px; border-top: 1px solid rgba(255,255,255,.05); background: rgba(0,0,0,.18); flex-wrap: wrap; }
.calc-modes, .calc-actions { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.calc-pill {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em; padding: 5px 11px; border: 1px solid rgba(255,255,255,.1);
  border-radius: 999px; background: rgba(255,255,255,.04); color: var(--text-2); cursor: pointer; transition: border-color var(--t), color var(--t);
}
.calc-pill:hover { border-color: var(--brand); color: var(--text); }
.calc-pill.on { color: var(--brand-ink); background: var(--brand); border-color: var(--brand); font-weight: 700; }
.calc-prec select { background: transparent; border: 0; color: var(--text); font-family: var(--mono); font-size: 12px; margin-left: 2px; cursor: pointer; }
.calc-prec select option { background: var(--card); }
.calc-tool {
  font-size: 13px; padding: 6px 12px; border: 1px solid rgba(255,255,255,.1); border-radius: 999px; background: transparent; color: var(--text-2); cursor: pointer;
  transition: background var(--t), color var(--t), border-color var(--t);
}
.calc-tool:hover { background: rgba(255,255,255,.06); color: var(--text); border-color: rgba(255,255,255,.18); }
.calc-savebox { display: flex; gap: 8px; padding: 10px 14px 14px; flex-wrap: wrap; border-top: 1px solid rgba(255,255,255,.05); }
.calc-savebox .input { flex: 1 1 220px; }

/* ── Sekmeler (segmentli) ── */
.calc-tabs { display: inline-flex; gap: 2px; margin: 16px 0 10px; padding: 3px; border: 1px solid var(--hair); border-radius: 999px; background: var(--card); }
.calc-tab { padding: 7px 14px; border: 0; border-radius: 999px; background: transparent; color: var(--text-2); font-size: 13.5px; font-weight: 500; cursor: pointer; transition: background var(--t), color var(--t); }
.calc-tab:hover { color: var(--text); }
.calc-tab.on { color: var(--text); background: var(--card-2); box-shadow: 0 1px 2px rgba(0,0,0,.4); }

/* ── Tuş takımı ── */
.calc-pad { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.calc-fns, .calc-nums { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; padding: 10px; border: 1px solid var(--hair); border-radius: 16px; background: var(--card); }
.calc-key {
  height: 52px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface); color: var(--text);
  font-size: 17px; font-weight: 500; cursor: pointer; padding: 0 4px; user-select: none;
  box-shadow: 0 2px 0 #060910; transition: background var(--t), transform .06s ease, box-shadow .06s ease;
}
.calc-key:hover { background: var(--card-2); border-color: var(--border-2); }
.calc-key:active { transform: translateY(2px); box-shadow: none; }
.calc-key.fn { font-size: 14px; color: var(--text-2); }
.calc-key.const { color: var(--brand-2); font-style: italic; }
.calc-key.num { font-size: 19px; font-weight: 600; background: var(--card-2); }
.calc-key.zero { grid-column: span 2; }
.calc-key.op { color: var(--brand); font-size: 21px; font-weight: 600; }
.calc-key.back { font-size: 18px; color: var(--err); }
.calc-key.eq { grid-row: span 2; background: var(--brand); color: var(--brand-ink); font-weight: 800; font-size: 24px; border-color: transparent; box-shadow: 0 2px 0 #1f8f66; }
.calc-key.eq:hover { background: var(--brand-2); }

/* ── Dönüştürücü / sayı sistemleri / işlevler ── */
.calc-pane:not(.calc-pad) { padding: 14px; border: 1px solid var(--hair); border-radius: 16px; background: var(--card); }
.calc-conv { display: grid; grid-template-columns: 1fr 1fr auto 1fr; gap: 8px; align-items: center; }
.calc-conv-out { grid-column: 1 / -1; font-family: var(--mono); font-size: 24px; padding: 8px 0 2px; color: #e9fff5; }
.calc-conv-out.is-err { font-size: 14px; color: var(--err); }
.calc-arrow { color: var(--muted); text-align: center; }
.calc-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.calc-chips .chip { cursor: pointer; font-family: var(--mono); font-size: 12.5px; }
.calc-note { font-size: 13px; margin: 12px 0 0; }
.calc-base-in { width: 100%; font-family: var(--mono); font-size: 18px; }
.calc-base-out { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; margin: 12px 0 0; }
.calc-base-out div { border: 1px solid var(--hair); border-radius: 10px; padding: 8px 10px; background: var(--surface); }
.calc-base-out dt { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.calc-base-out dd { margin: 4px 0 0; font-family: var(--mono); font-size: 16px; word-break: break-all; }
.calc-help-group { margin-bottom: 14px; }
.calc-help-group h3 { font-size: 12.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--text-2); margin: 0 0 4px; }

/* ── Yan panel ── */
.calc-side { position: sticky; top: calc(var(--nav-h) + 16px); border: 1px solid var(--hair); border-radius: 16px; background: var(--card); padding: 10px 12px 12px; max-height: calc(100vh - var(--nav-h) - 32px); overflow: auto; }
.calc-side .calc-tabs { margin: 0 0 8px; }
.calc-list ul { list-style: none; margin: 0; padding: 0; }
.calc-list li { display: flex; align-items: flex-start; gap: 6px; border-bottom: 1px solid var(--hair); flex-wrap: wrap; }
.calc-list li:last-child { border-bottom: 0; }
.calc-row { flex: 1 1 auto; min-width: 0; text-align: left; background: transparent; border: 0; padding: 9px 6px; cursor: pointer; color: var(--text); display: flex; flex-direction: column; gap: 2px; border-radius: 8px; }
.calc-row:hover { background: var(--card-2); }
.calc-row-expr { font-family: var(--mono); font-size: 12.5px; color: var(--text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.calc-row-res { font-family: var(--mono); font-size: 15px; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.calc-row-name { flex: 1 1 100%; font-size: 13.5px; font-weight: 600; padding: 9px 6px 0; color: var(--brand-2); }
.calc-x { border: 0; background: transparent; color: var(--muted); font-size: 18px; line-height: 1; padding: 9px 6px; cursor: pointer; }
.calc-x:hover { color: var(--err); }
.calc-empty { font-size: 13.5px; margin: 10px 6px; }
.calc-list-foot { margin-top: 8px; }
.calc [hidden] { display: none !important; }

@media (max-width: 1000px) {
  .calc { grid-template-columns: 1fr; }
  .calc-side { position: static; max-height: none; }
}
@media (max-width: 640px) {
  .calc-pad { grid-template-columns: 1fr; }
  .calc-fns { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .calc-fns .calc-key { height: 42px; font-size: 13px; }
  .calc-nums .calc-key { height: 50px; }
  .calc-input { font-size: 17px; }
  .calc-out { font-size: 32px; min-height: 46px; }
  .calc-conv { grid-template-columns: 1fr 1fr; }
  .calc-arrow { display: none; }
}