/* ═══════════════════════════════════════════════════════════════════
   Klassa — Birleşik Hesaplama Araçları (v2.0)
   Site renkleri: lacivert #0B3A6E / #071F3D · turkuaz #0D9488 · Inter
   ═══════════════════════════════════════════════════════════════════ */
.kt {
    --kt-navy: var(--primary-blue, #0B3A6E);
    --kt-navy-d: var(--primary-dark, #071F3D);
    --kt-teal: var(--accent-orange, #0D9488);
    --kt-teal-l: var(--accent-soft, #E6F7F5);
    --kt-ink: #0F1C2E;
    --kt-mut: #5A6A7A;
    --kt-line: #E2E8F0;
    --kt-bg: #F4F7FA;
    --kt-warn-bg: #FFF7E6; --kt-warn-bd: #F2D49B; --kt-warn: #7A5300;
    --kt-ok-bg: #EAF7EF;   --kt-ok-bd: #BFE3CC;   --kt-ok: #1B5E34;
    --kt-r: 14px;
    background: var(--kt-bg);
    color: var(--kt-ink);
    font-family: var(--font-primary, 'Inter', system-ui, sans-serif);
    padding-bottom: 3rem;
}
.kt *, .kt *::before, .kt *::after { box-sizing: border-box; }
.kt-wrap { max-width: 1200px; margin: 0 auto; padding: 0 1.25rem; }

/* ── Başlık ── */
.kt-hero { background: linear-gradient(120deg, var(--kt-navy-d), var(--kt-navy) 60%, #0F5B8A); color: #fff; padding: 1.75rem 0 1.5rem; }
.kt-label { display: inline-block; font-size: .7rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; opacity: .75; margin-bottom: .35rem; }
.kt-h1 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 700; line-height: 1.2; margin: 0 0 .4rem; color: #fff; }
.kt-lead { max-width: 70ch; margin: 0; font-size: 1rem; line-height: 1.5; opacity: .88; }

/* ── Araç sekmeleri ── */
.kt-tabs { display: flex; gap: .5rem; flex-wrap: wrap; margin: -1.1rem 0 1.25rem; position: relative; z-index: 2; }
.kt-tab { display: inline-flex; align-items: center; gap: .45rem; padding: .6rem .95rem; border-radius: 10px; background: #fff; color: var(--kt-navy); font-weight: 600; font-size: .875rem; text-decoration: none; box-shadow: 0 2px 10px rgba(11,58,110,.10); border: 1px solid var(--kt-line); }
.kt-tab:hover { color: var(--kt-teal); border-color: var(--kt-teal); }
.kt-tab.is-on { background: var(--kt-teal); color: #fff; border-color: var(--kt-teal); }

/* ── Yerleşim: solda girdi, sağda sonuç ── */
.kt-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 1.25rem; align-items: start; }
@media (max-width: 960px) { .kt-grid { grid-template-columns: 1fr; } }
.kt-card { background: #fff; border: 1px solid var(--kt-line); border-radius: var(--kt-r); padding: 1.25rem; box-shadow: 0 1px 3px rgba(11,58,110,.05); }
.kt-out { position: sticky; top: 1rem; }
@media (max-width: 960px) { .kt-out { position: static; } }
.kt-card-h { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.kt-card-h h2 { font-size: 1.05rem; font-weight: 700; color: var(--kt-navy); margin: 0; }
.kt h3 { font-size: .95rem; font-weight: 700; color: var(--kt-navy); margin: 0 0 .75rem; }

/* ── Form alanları ── */
.kt-f { display: flex; flex-direction: column; gap: .25rem; min-width: 0; }
.kt-f > span { font-size: .76rem; font-weight: 600; color: var(--kt-mut); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.kt-f[hidden], .kt [hidden] { display: none !important; }
.kt input, .kt select { width: 100%; height: 40px; border: 1px solid #CBD5E1; border-radius: 9px; padding: 0 .65rem; font: inherit; font-size: .9rem; color: var(--kt-ink); background: #fff; }
.kt input:focus, .kt select:focus { outline: none; border-color: var(--kt-teal); box-shadow: 0 0 0 3px rgba(13,148,136,.18); }
.kt input[type=number] { -moz-appearance: textfield; }
.kt input::-webkit-outer-spin-button, .kt input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.kt-unit { display: inline-flex; align-items: center; gap: .5rem; font-size: .78rem; color: var(--kt-mut); }
.kt-unit select { width: auto; height: 34px; }
.kt-opts { display: grid; gap: .75rem; margin-bottom: 1rem; }
.kt-opts--2 { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.kt-opts--3 { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.kt-opts--pair { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 420px) { .kt-opts--pair { grid-template-columns: 1fr; } }

/* ── Yük satırları ── */
.kt-rows { display: flex; flex-direction: column; gap: .6rem; }
.kt-row { position: relative; display: grid; gap: .5rem; padding: .75rem .75rem .75rem .9rem; border: 1px solid var(--kt-line); border-radius: 11px; background: #FBFCFE; border-inline-start: 4px solid var(--kt-c, var(--kt-teal)); }
.kt-row-top { display: grid; grid-template-columns: 1fr auto; gap: .5rem; align-items: end; }
.kt-row-dims { display: grid; grid-template-columns: repeat(var(--kt-cols, 5), minmax(0, 1fr)); gap: .5rem; align-items: end; }
@media (max-width: 560px) { .kt-row-dims { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.kt-del { width: 40px; height: 40px; border: 1px solid var(--kt-line); background: #fff; border-radius: 9px; color: #B42318; font-size: 1rem; cursor: pointer; }
.kt-del:hover { background: #FEF3F2; }
.kt-check { display: inline-flex; align-items: center; gap: .4rem; font-size: .82rem; color: var(--kt-mut); height: 40px; }
.kt-check input { width: 18px; height: 18px; }

.kt-modes { display: flex; flex-wrap: wrap; align-items: center; gap: .25rem 1rem; }
.kt-modes .kt-check { height: 32px; }
.kt-f--inline { flex-direction: row; align-items: center; gap: .4rem; }
.kt-f--inline select { width: auto; height: 32px; }
.kt-checks { display: flex; flex-wrap: wrap; gap: 0 1.1rem; margin-bottom: .5rem; }
.kt-sub h3 { margin-top: .25rem; }

/* ── Butonlar ── */
.kt-actions { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: 1rem; }
.kt-btn { display: inline-flex; align-items: center; justify-content: center; gap: .4rem; min-height: 44px; padding: .6rem 1.2rem; border-radius: 10px; font: inherit; font-weight: 700; font-size: .92rem; cursor: pointer; border: 1px solid transparent; text-decoration: none; transition: background .15s, transform .15s; }
.kt-btn--primary { background: var(--kt-navy); color: #fff; flex: 1 1 160px; }
.kt-btn--primary:hover { background: var(--kt-navy-d); }
.kt-btn--accent { background: var(--kt-teal); color: #fff; flex: 1 1 160px; }
.kt-btn--accent:hover { background: #0B7F75; }
.kt-btn--ghost { background: #fff; color: var(--kt-navy); border-color: #CBD5E1; }
.kt-btn--ghost:hover { border-color: var(--kt-teal); color: var(--kt-teal); }
.kt-msg { color: #B42318; font-size: .85rem; min-height: 1.2em; margin: .5rem 0 0; }
.kt-sub { margin-top: 1.25rem; padding-top: 1.1rem; border-top: 1px dashed var(--kt-line); }

/* ── Sonuç kartları ── */
.kt-empty { color: var(--kt-mut); background: var(--kt-bg); border-radius: 10px; padding: 1.25rem; text-align: center; margin: 0; }
.kt-kpis { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
.kt-kpi { background: var(--kt-bg); border-radius: 11px; padding: .8rem .9rem; }
.kt-kpi .k { font-size: .7rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--kt-mut); }
.kt-kpi .v { font-size: 1.45rem; font-weight: 800; color: var(--kt-ink); line-height: 1.2; margin-top: .15rem; font-variant-numeric: tabular-nums; }
.kt-kpi .v small { font-size: .8rem; font-weight: 600; color: var(--kt-mut); margin-inline-start: .15rem; }
.kt-kpi .s { font-size: .74rem; color: var(--kt-mut); margin-top: .1rem; }
.kt-kpi--hl { grid-column: 1 / -1; background: linear-gradient(120deg, var(--kt-navy), #0F5B8A); }
.kt-kpi--hl .k, .kt-kpi--hl .s, .kt-kpi--hl .v small { color: rgba(255,255,255,.78); }
.kt-kpi--hl .v { color: #fff; font-size: 1.9rem; }

.kt-bar { margin-top: 1rem; }
.kt-bar-l { display: flex; justify-content: space-between; font-size: .75rem; font-weight: 600; color: var(--kt-mut); margin-bottom: .3rem; }
.kt-bar-t { height: 10px; background: #E7EDF4; border-radius: 99px; overflow: hidden; }
.kt-bar-f { height: 100%; background: var(--kt-teal); border-radius: 99px; transition: width .4s; }
.kt-bar-f.is-over { background: #D97706; }

.kt-note { margin-top: .9rem; padding: .7rem .9rem; border-radius: 10px; font-size: .86rem; line-height: 1.5; background: var(--kt-teal-l); border: 1px solid #9ED9D2; color: var(--kt-navy); }
.kt-note--ok { background: var(--kt-ok-bg); border-color: var(--kt-ok-bd); color: var(--kt-ok); }
.kt-note--warn { background: var(--kt-warn-bg); border-color: var(--kt-warn-bd); color: var(--kt-warn); }
.kt-note ul { margin: .35rem 0 0; padding-inline-start: 1.1rem; list-style: disc; }
.kt-small { font-size: .78rem; color: var(--kt-mut); margin: .6rem 0 0; }

.kt-table { width: 100%; border-collapse: collapse; font-size: .85rem; margin-top: .9rem; }
.kt-table th, .kt-table td { padding: .45rem .4rem; border-bottom: 1px solid var(--kt-line); text-align: start; }
.kt-table td.n, .kt-table th.n { text-align: end; font-variant-numeric: tabular-nums; }
.kt-table tr.tot td { font-weight: 700; border-top: 2px solid var(--kt-line); }

/* ── Konteyner görselleştirme ── */
.kt-bins { display: flex; gap: .4rem; flex-wrap: wrap; margin: 1rem 0 .5rem; }
.kt-bins button { border: 1px solid var(--kt-line); background: #fff; border-radius: 8px; padding: .35rem .7rem; font: inherit; font-size: .8rem; cursor: pointer; color: var(--kt-navy); }
.kt-bins button.is-on { background: var(--kt-navy); color: #fff; border-color: var(--kt-navy); }
.kt-plan { width: 100%; height: auto; display: block; background: #F8FAFC; border: 1px solid var(--kt-line); border-radius: 10px; }
.kt-legend { display: flex; flex-wrap: wrap; gap: .4rem .9rem; font-size: .78rem; color: var(--kt-mut); margin-top: .5rem; }
.kt-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-inline-end: .3rem; vertical-align: -1px; }
.kt-cog { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .4rem; font-size: .82rem; margin-top: .6rem; }
.kt-link { display: inline-block; margin-top: .8rem; font-size: .85rem; font-weight: 600; color: var(--kt-teal); }

/* ── 3B simülasyon sahnesi ── */
.kt-stage { position: relative; height: 380px; border-radius: 12px; overflow: hidden; border: 1px solid var(--kt-line); background: radial-gradient(120% 90% at 70% 0%, #FFFFFF 0%, #EEF3F8 55%, #E2E9F1 100%); cursor: grab; }
.kt-stage:active { cursor: grabbing; }
.kt-stage canvas { width: 100% !important; height: 100% !important; }
.kt-stage-msg { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--kt-mut); font-size: .88rem; }
.kt-stage-hint { position: absolute; inset-inline-start: 10px; bottom: 8px; font-size: .72rem; color: var(--kt-mut); background: rgba(255,255,255,.85); padding: .2rem .5rem; border-radius: 6px; pointer-events: none; }
@media (max-width: 560px) { .kt-stage { height: 300px; } }
.kt-stage.is-fallback { height: auto; min-height: 0; cursor: default; }
.kt-stage.is-fallback .kt-stage-msg { position: static; padding: .9rem; }
.kt-stage.is-fallback .kt-stage-hint { display: none; }

/* ── Teklif ── */
.kt-quote { margin-top: 1.25rem; padding-top: 1.1rem; border-top: 1px solid var(--kt-line); }
.kt-hint { font-size: .78rem; color: var(--kt-mut); margin: .6rem 0 0; }
.kt-hint a { color: var(--kt-teal); }

/* ── SSS / formül ── */
.kt-faq { margin-top: 1.5rem; background: #fff; border: 1px solid var(--kt-line); border-radius: var(--kt-r); padding: 1rem 1.25rem; }
.kt-faq summary { cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; }
.kt-faq summary::-webkit-details-marker { display: none; }
.kt-faq summary::after { content: '+'; font-size: 1.3rem; color: var(--kt-teal); font-weight: 700; }
.kt-faq[open] summary::after { content: '–'; }
.kt-faq summary h2 { font-size: 1.05rem; color: var(--kt-navy); margin: 0; }
.kt-faq h3 { margin: 1rem 0 .3rem; }
.kt-faq p { margin: 0; line-height: 1.6; color: #3A4656; font-size: .92rem; max-width: 80ch; }
.kt-disc { margin-top: 1rem !important; font-size: .8rem !important; color: var(--kt-mut) !important; }

/* RTL */
body.rtl .kt-kpi .v, body.rtl .kt-table td.n { direction: ltr; unicode-bidi: plaintext; }

@media print {
    .kt-tabs, .kt-in, .kt-quote, .kt-faq, .main-header, .utility-bar, .main-footer { display: none !important; }
    .kt-grid { grid-template-columns: 1fr; }
    .kt-out { position: static; box-shadow: none; }
}
@media (prefers-reduced-motion: reduce) { .kt-bar-f { transition: none; } }