/* =====================================================
   hesaplamasinet — Design System
   ===================================================== */

:root {
    --bg: #ffffff;
    --ink: #0f172a;
    --ink-2: #475569;
    --ink-3: #94a3b8;
    --line: #eef0f4;
    --line-2: #e6e9ef;

    --c-math-bg: #eaf2ff;
    --c-math-bg-2: #dbe8ff;
    --c-math-ink: #1e40af;
    --c-math-accent: #2563eb;

    --c-finance-bg: #e6f7ee;
    --c-finance-bg-2: #d3f0df;
    --c-finance-ink: #065f46;
    --c-finance-accent: #059669;

    --c-health-bg: #ffeaf0;
    --c-health-bg-2: #ffd9e3;
    --c-health-ink: #9d174d;
    --c-health-accent: #e11d74;

    --c-life-bg: #fff1e0;
    --c-life-bg-2: #ffe2c2;
    --c-life-ink: #9a3412;
    --c-life-accent: #ea7d1a;

    --c-eng-bg: #e6f1f5;
    --c-eng-bg-2: #d2e6ed;
    --c-eng-ink: #075985;
    --c-eng-accent: #0891b2;

    --c-tech-bg: #efe9ff;
    --c-tech-bg-2: #e1d6ff;
    --c-tech-ink: #5b21b6;
    --c-tech-accent: #7c3aed;

    --c-edu-bg: #fff7e0;
    --c-edu-bg-2: #ffecbf;
    --c-edu-ink: #854d0e;
    --c-edu-accent: #ca8a04;

    --c-trade-bg: #fde8ec;
    --c-trade-bg-2: #fbd5db;
    --c-trade-ink: #9f1239;
    --c-trade-accent: #e11d48;

    --c-fun-bg: #fce7f3;
    --c-fun-bg-2: #fbcfe8;
    --c-fun-ink: #831843;
    --c-fun-accent: #db2777;

    --c-other-bg: #eef2f5;
    --c-other-bg-2: #dde4ea;
    --c-other-ink: #334155;
    --c-other-accent: #475569;
}

html, body { background: var(--bg); color: var(--ink); }
html { scroll-behavior: smooth; }
body {
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* ===== TOPBAR ===== */
.topbar {
    border-bottom: 1px solid rgba(15,23,42,.06);
    background: #ddf4e7;
    position: sticky; top: 0; z-index: 50;
}
.brand {
    display: inline-flex; align-items: center; gap: .6rem;
    font-weight: 800; font-size: 1.15rem; color: var(--ink); text-decoration: none;
    letter-spacing: -0.01em;
}
.brand-mark {
    width: 34px; height: 34px; border-radius: 9px;
    display: grid; place-items: center;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: #fff; font-size: 1.05rem;
}
.brand .dot  { color: #94a3b8; font-weight: 600; }
.brand .tld  { color: #64748b; font-weight: 600; }
.nav-link-soft { color: var(--ink-2); font-weight: 500; }
.nav-link-soft:hover { color: var(--ink); }

/* Search pill */
.search-pill {
    background: #ffffff;
    border: 1px solid rgba(15,23,42,.08);
    border-radius: 999px;
    padding: .32rem .8rem .32rem 2.05rem;
    font-size: .82rem;
    width: 220px; max-width: 100%;
    transition: border-color .15s, background .15s, box-shadow .15s, width .15s;
}
.search-pill:focus {
    outline: none; background: #fff;
    border-color: #94c8a8;
    box-shadow: 0 0 0 4px rgba(5,150,105,.12);
    width: 260px;
}
.search-wrap { position: relative; }
.search-wrap .bi-search {
    position: absolute; left: .75rem; top: 50%; transform: translateY(-50%);
    color: #94a3b8; font-size: .85rem;
}

/* Arama dropdown */
.arama-dropdown {
    position: absolute; right: 0; top: calc(100% + 8px);
    min-width: 300px; background: #fff;
    border: 1px solid rgba(15,23,42,.06); border-radius: 14px;
    box-shadow: 0 18px 40px -18px rgba(15,23,42,.25), 0 4px 14px -8px rgba(15,23,42,.1);
    z-index: 9999;
    overflow: hidden;
}
.arama-dropdown a {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 14px; color: var(--ink); text-decoration: none; font-size: .9rem;
    transition: background .12s;
}
.arama-dropdown a:hover { background: #f5f7fa; }
.arama-dropdown .arama-kategori {
    font-size: .72rem; font-weight: 600; color: var(--ink-3);
    padding: 8px 14px 2px; text-transform: uppercase; letter-spacing: .1em;
}
.arama-item { display: flex; align-items: center; gap: 10px; }
.arama-item-ad { font-size: .88rem; font-weight: 500; color: var(--ink); }
.arama-item-kat { font-size: .75rem; color: var(--ink-3); }
.arama-tum {
    display: flex; align-items: center; justify-content: center; gap: 6px;
    padding: 10px 14px; font-size: .85rem; font-weight: 600;
    color: var(--accent); border-top: 1px solid var(--line);
}
.arama-tum:hover { background: var(--c-math-bg) !important; }

/* Hover dropdown */
.nav-hover { position: relative; }
.nav-hover > .nav-link {
    display: inline-flex; align-items: center; gap: 4px;
    padding: .5rem .75rem; border-radius: 8px;
}
.nav-hover > .nav-link .caret { font-size: .7rem; transition: transform .18s ease; opacity: .65; }
.nav-hover:hover > .nav-link,
.nav-hover:focus-within > .nav-link { background: rgba(255,255,255,.55); color: var(--ink); }
.nav-hover:hover > .nav-link .caret,
.nav-hover:focus-within > .nav-link .caret { transform: rotate(180deg); }

.nav-mega {
    position: absolute; left: 0; top: 100%;
    min-width: 280px; background: #fff;
    border: 1px solid rgba(15,23,42,.06); border-radius: 14px;
    box-shadow: 0 18px 40px -18px rgba(15,23,42,.25), 0 4px 14px -8px rgba(15,23,42,.1);
    padding: 8px; opacity: 0; visibility: hidden;
    transform: translateY(6px);
    transition: opacity .16s ease, transform .16s ease, visibility .16s;
    z-index: 60;
}
.nav-hover:hover .nav-mega,
.nav-hover:focus-within .nav-mega { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-hover::after { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 10px; }

.nav-mega .mega-item {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 10px; border-radius: 9px;
    color: var(--ink); text-decoration: none;
    font-size: .9rem; font-weight: 500; transition: background .12s;
}
.nav-mega .mega-item:hover { background: #f5f7fa; }
.nav-mega .mega-item .ico {
    width: 28px; height: 28px; border-radius: 7px;
    display: grid; place-items: center; font-size: .85rem; flex-shrink: 0;
}
.nav-mega .mega-item .meta { color: var(--ink-3); font-size: .72rem; font-weight: 500; margin-top: 1px; }

@media (max-width: 991.98px) {
    .nav-mega {
        position: static; opacity: 1; visibility: visible; transform: none;
        box-shadow: none; border: none; padding: 4px 0 4px 38px; min-width: 0;
    }
    .nav-hover::after { display: none; }
}

/* Icon color variants */
.ico-blue    { background: var(--c-math-bg);    color: var(--c-math-accent); }
.ico-green   { background: var(--c-finance-bg); color: var(--c-finance-accent); }
.ico-pink    { background: var(--c-health-bg);  color: var(--c-health-accent); }
.ico-orange  { background: var(--c-life-bg);    color: var(--c-life-accent); }
.ico-cyan    { background: var(--c-eng-bg);     color: var(--c-eng-accent); }
.ico-purple  { background: var(--c-tech-bg);    color: var(--c-tech-accent); }
.ico-amber   { background: var(--c-edu-bg);     color: var(--c-edu-accent); }
.ico-rose    { background: var(--c-trade-bg);   color: var(--c-trade-accent); }
.ico-fuchsia { background: var(--c-fun-bg);     color: var(--c-fun-accent); }
.ico-slate   { background: var(--c-other-bg);   color: var(--c-other-accent); }

/* ===== LAYOUT ===== */
.container-x { max-width: 1180px; }

/* ===== BREADCRUMB ===== */
.crumb {
    font-size: .85rem; color: var(--ink-3); padding: 18px 0 6px;
}
.crumb a { color: var(--ink-2); text-decoration: none; }
.crumb a:hover { color: var(--ink); }
.crumb .sep { margin: 0 8px; color: #cbd5e1; }
.crumb .now { color: var(--ink); font-weight: 600; }

/* ===== PAGE HEAD ===== */
.page-head { padding: 6px 0 24px; }
.page-head .badge-ico {
    width: 56px; height: 56px; border-radius: 14px;
    display: grid; place-items: center; font-size: 1.55rem; flex-shrink: 0;
}
.page-head .badge-ico.ico-bg-blue   { background: var(--c-math-bg);    color: var(--c-math-accent); }
.page-head .badge-ico.ico-bg-green  { background: var(--c-finance-bg); color: var(--c-finance-accent); }
.page-head .badge-ico.ico-bg-pink   { background: var(--c-health-bg);  color: var(--c-health-accent); }
.page-head .badge-ico.ico-bg-orange { background: var(--c-life-bg);    color: var(--c-life-accent); }
.page-head .badge-ico.ico-bg-cyan   { background: var(--c-eng-bg);     color: var(--c-eng-accent); }
.page-head .badge-ico.ico-bg-purple { background: var(--c-tech-bg);    color: var(--c-tech-accent); }

.page-head h1 {
    font-weight: 800; font-size: clamp(1.6rem, 2.6vw, 2.1rem);
    letter-spacing: -0.02em; margin: 0;
}
.page-head .lead { color: var(--ink-2); margin: 4px 0 0; max-width: 60ch; font-size: 1rem; }
.meta-row {
    display: flex; flex-wrap: wrap; gap: 16px;
    color: var(--ink-3); font-size: .85rem; margin-top: 12px;
}
.meta-row span { display: inline-flex; align-items: center; gap: 6px; }

/* ===== CALCULATOR SHELL ===== */
.calc-shell {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 1px 0 rgba(15,23,42,.02);
}
.calc-tabs {
    display: flex; gap: 0;
    border-bottom: 1px solid var(--line);
    background: #fafbfc;
    overflow-x: auto;
}
.calc-tab {
    padding: 14px 18px;
    background: none; border: 0;
    font-weight: 600; font-size: .92rem;
    color: var(--ink-2); cursor: pointer;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: color .15s, border-color .15s, background .15s;
}
.calc-tab:hover { color: var(--ink); }
.calc-tab.active {
    color: var(--c-math-accent);
    border-bottom-color: var(--c-math-accent);
    background: #fff;
}
.calc-tab.active-green  { color: var(--c-finance-accent); border-bottom-color: var(--c-finance-accent); }
.calc-tab.active-pink   { color: var(--c-health-accent);  border-bottom-color: var(--c-health-accent); }
.calc-tab.active-orange { color: var(--c-life-accent);    border-bottom-color: var(--c-life-accent); }
.calc-body { padding: 26px; }

/* Field label */
.field-label {
    font-size: .82rem; font-weight: 600; color: var(--ink-2);
    text-transform: uppercase; letter-spacing: .08em; margin-bottom: 8px;
    display: block;
}
/* Number input */
.num-input {
    width: 100%; background: #fff;
    border: 1.5px solid var(--line-2);
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 1.2rem; font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--ink);
    transition: border-color .15s, box-shadow .15s;
}
.num-input:focus {
    outline: none;
    border-color: var(--c-math-accent);
    box-shadow: 0 0 0 4px rgba(37,99,235,.1);
}
.num-input::placeholder { color: #cbd5e1; font-weight: 500; }

/* Equation line */
.equation-line {
    display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.equation-line .frag { color: var(--ink-2); font-weight: 600; font-size: .95rem; padding: 0 4px; }
.equation-line .field { flex: 1; min-width: 140px; }
.equation-line .field .num-input { padding: 10px 14px; font-size: 1.1rem; }

/* Result card */
.result-card {
    margin-top: 20px;
    background: linear-gradient(135deg, var(--c-math-bg), #f0f6ff);
    border: 1px solid #d8e7ff;
    border-radius: 14px;
    padding: 18px 20px;
    display: flex; align-items: center; justify-content: space-between;
    gap: 16px; flex-wrap: wrap;
}
.result-card.green  { background: linear-gradient(135deg, var(--c-finance-bg), #f0fff8); border-color: #a7f3d0; }
.result-card.pink   { background: linear-gradient(135deg, var(--c-health-bg), #fff0f5);  border-color: #fbb6ce; }
.result-card.orange { background: linear-gradient(135deg, var(--c-life-bg), #fffbeb);   border-color: #fcd34d; }
.result-card .label { font-size: .8rem; font-weight: 600; color: var(--c-math-ink); letter-spacing: .08em; text-transform: uppercase; }
.result-card .value {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 800; color: var(--c-math-ink);
    letter-spacing: -0.02em; line-height: 1.1; margin-top: 2px;
}
.result-card.green  .label, .result-card.green  .value { color: var(--c-finance-ink); }
.result-card.pink   .label, .result-card.pink   .value { color: var(--c-health-ink); }
.result-card.orange .label, .result-card.orange .value { color: var(--c-life-ink); }
.result-card .formula-inline {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: .85rem; color: #475569;
    background: rgba(255,255,255,.7);
    padding: 8px 12px; border-radius: 8px;
    border: 1px solid #d8e7ff;
}
.copy-btn {
    background: #fff; border: 1px solid #c8dbff;
    border-radius: 10px; padding: 8px 12px;
    font-size: .85rem; font-weight: 600; color: var(--c-math-ink);
    cursor: pointer; transition: background .15s;
    display: inline-flex; align-items: center; gap: 6px;
}
.copy-btn:hover { background: #f0f6ff; }

/* Quick chips */
.quick-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.chip {
    background: #f5f6f8; border: 1px solid var(--line);
    border-radius: 999px; padding: 6px 12px;
    font-size: .82rem; font-weight: 500; color: var(--ink-2);
    cursor: pointer; transition: background .15s, border-color .15s;
}
.chip:hover { background: #fff; border-color: #cbd5e1; color: var(--ink); }

/* ===== SIDE CARDS ===== */
.side-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 20px;
}
.side-card h3 {
    font-size: 1rem; font-weight: 700; letter-spacing: -0.01em;
    margin: 0 0 12px; display: flex; align-items: center; gap: 8px;
}
.side-card h3 i { color: var(--c-math-accent); }
.side-card h3 i.green  { color: var(--c-finance-accent); }
.side-card h3 i.pink   { color: var(--c-health-accent); }
.side-card h3 i.orange { color: var(--c-life-accent); }

.formula-box {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    background: #f7f9fc; border: 1px solid var(--line);
    border-radius: 10px; padding: 10px 12px;
    font-size: .88rem; color: var(--ink); margin-bottom: 8px;
    overflow-x: auto; white-space: nowrap;
}
.formula-box .var { color: var(--c-math-accent); font-weight: 600; }
.formula-box .var.green  { color: var(--c-finance-accent); }
.formula-box .var.pink   { color: var(--c-health-accent); }
.formula-cap { color: var(--ink-3); font-size: .8rem; margin: 6px 0 0; }

/* Related list */
.related-list { display: grid; gap: 8px; }
.related-list a {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px; border-radius: 10px;
    text-decoration: none; color: var(--ink);
    border: 1px solid transparent;
    font-size: .92rem; font-weight: 500;
    transition: background .15s, border-color .15s;
}
.related-list a:hover { background: #f7f9fc; border-color: var(--line); }
.related-list a .ico {
    width: 32px; height: 32px; border-radius: 8px;
    display: grid; place-items: center; font-size: .9rem;
}

/* Tip card */
.tip-card {
    background: linear-gradient(135deg, var(--c-math-bg), #f5f9ff);
    border: 1px solid #d8e7ff;
    border-radius: 16px; padding: 20px;
}
.tip-card.green  { background: linear-gradient(135deg, var(--c-finance-bg), #f0fff8); border-color: #a7f3d0; }
.tip-card.pink   { background: linear-gradient(135deg, var(--c-health-bg), #fff0f5);  border-color: #fbb6ce; }
.tip-card.orange { background: linear-gradient(135deg, var(--c-life-bg), #fffbeb);   border-color: #fcd34d; }
.tip-card h3 { color: var(--c-math-ink); font-size: 1rem; font-weight: 700; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
.tip-card.green  h3 { color: var(--c-finance-ink); }
.tip-card.pink   h3 { color: var(--c-health-ink); }
.tip-card.orange h3 { color: var(--c-life-ink); }
.tip-card p { color: #334155; font-size: .92rem; margin: 0; line-height: 1.55; }

/* ===== PROSE SECTION (How-to + FAQ) ===== */
.prose-section { padding: 50px 0 0; }
.prose-section h2 {
    font-weight: 800; font-size: 1.5rem; letter-spacing: -0.02em; margin: 0 0 16px;
}
.prose-section p { color: var(--ink-2); line-height: 1.65; }

/* Step list */
.step-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.step-list li {
    display: flex; gap: 14px; align-items: flex-start;
    padding: 14px 16px; background: #fff;
    border: 1px solid var(--line); border-radius: 12px;
}
.step-num {
    width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
    background: var(--c-math-bg); color: var(--c-math-accent);
    display: grid; place-items: center; font-weight: 700; font-size: .9rem;
}
.step-num.green  { background: var(--c-finance-bg); color: var(--c-finance-accent); }
.step-num.pink   { background: var(--c-health-bg);  color: var(--c-health-accent); }
.step-num.orange { background: var(--c-life-bg);    color: var(--c-life-accent); }
.step-body { flex: 1; }
.step-body strong { display: block; margin-bottom: 2px; }
.step-body span   { color: var(--ink-2); font-size: .92rem; }

/* FAQ */
.faq-item {
    border: 1px solid var(--line); border-radius: 12px;
    background: #fff; overflow: hidden;
}
.faq-item + .faq-item { margin-top: 10px; }
.faq-item summary {
    list-style: none; cursor: pointer; padding: 16px 18px;
    font-weight: 600; font-size: .98rem;
    display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "\f282"; font-family: bootstrap-icons;
    color: var(--ink-3); transition: transform .2s; font-size: 1rem;
    flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item .ans { padding: 0 18px 16px; color: var(--ink-2); line-height: 1.6; }
.faq-item .ans a { color: var(--c-math-accent); }

/* ===== EXAMPLE TABLE ===== */
.ex-table {
    width: 100%; border-collapse: separate; border-spacing: 0;
    background: #fff; border: 1px solid var(--line); border-radius: 12px;
    overflow: hidden;
}
.ex-table th, .ex-table td {
    padding: 12px 16px; text-align: left; font-size: .92rem;
    border-bottom: 1px solid var(--line);
}
.ex-table th {
    background: #f7f9fc; font-weight: 600; color: var(--ink-2);
    font-size: .82rem; text-transform: uppercase; letter-spacing: .06em;
}
.ex-table tr:last-child td { border-bottom: 0; }
.ex-table .res { color: var(--c-math-accent); font-weight: 700; font-variant-numeric: tabular-nums; }
.ex-table .res.green  { color: var(--c-finance-accent); }
.ex-table .res.pink   { color: var(--c-health-accent); }

/* ===== AD SLOTS ===== */
.ad-slot {
    margin: 28px 0;
    background: #fafbfc;
    border: 1px dashed #d8dde6;
    border-radius: 12px;
  /*  min-height: 100px;*/
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.ad-slot::before {
    content: "Reklam";
    position: absolute; top: 6px; left: 10px;
    font-size: .68rem; font-weight: 600;
    color: #94a3b8; letter-spacing: .12em; text-transform: uppercase;
}
.ad-slot ins { display: block; width: 100%; min-height: 90px; }
.ad-slot.in-article  {/* min-height: 250px; */}
.ad-slot.in-article ins {/* min-height: 250px; */}
.ad-slot.banner      { /*min-height: 100px; max-height: 110px;*/ margin: 18px 0 4px; }
.ad-slot.banner ins  { /*min-height: 90px;*/ }
.ad-slot.multiplex   {/* min-height: 280px; */}
.ad-slot.sidebar     { /*min-height: 250px;*/ margin: 0; }
.ad-slot.sidebar ins {/* min-height: 250px; */}

/* ===== FOOTER ===== */
.site-footer {
    margin-top: 80px;
    border-top: 1px solid var(--line);
    background: #fafbfc;
    padding: 28px 0 26px;
}
.footer-links a { color: var(--ink-2); text-decoration: none; font-size: .9rem; font-weight: 500; }
.footer-links a:hover { color: var(--ink); }
.footer-copy { color: var(--ink-3); font-size: .85rem; }

/* ===== HOMEPAGE ===== */
.cat-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
}
@media (max-width: 991px) { .cat-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 575px)  { .cat-grid { grid-template-columns: repeat(2, 1fr); } }

.cat-card {
    border-radius: 16px; padding: 18px 16px;
    text-decoration: none; color: var(--ink);
    border: 1px solid transparent;
    transition: transform .18s, box-shadow .18s, border-color .18s;
    display: block;
}
.cat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 28px -8px rgba(15,23,42,.14);
    border-color: var(--line-2);
    color: var(--ink);
}
.cat-card .cat-ico {
    width: 44px; height: 44px; border-radius: 12px;
    display: grid; place-items: center; font-size: 1.3rem; margin-bottom: 12px;
}
.cat-card h3 { font-weight: 700; font-size: .95rem; margin: 0 0 4px; }
.cat-card p  { font-size: .8rem; color: var(--ink-3); margin: 0; }

.cat-card.blue   { background: var(--c-math-bg);    }
.cat-card.green  { background: var(--c-finance-bg); }
.cat-card.pink   { background: var(--c-health-bg);  }
.cat-card.orange { background: var(--c-life-bg);    }
.cat-card.cyan   { background: var(--c-eng-bg);     }
.cat-card.purple { background: var(--c-tech-bg);    }

/* ===== TOOL GRID (category index pages) ===== */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.tool-card {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 16px; border-radius: 14px;
    border: 1px solid var(--line); background: #fff;
    text-decoration: none; color: var(--ink);
    transition: background .15s, border-color .15s, transform .15s;
}
.tool-card:hover { background: #f7f9fc; border-color: var(--line-2); transform: translateY(-2px); color: var(--ink); }
.tool-card .t-ico {
    width: 40px; height: 40px; border-radius: 10px;
    display: grid; place-items: center; font-size: 1.1rem; flex-shrink: 0;
}
.tool-card .t-title { font-weight: 600; font-size: .92rem; }
.tool-card .t-desc  { font-size: .78rem; color: var(--ink-3); margin: 2px 0 0; }
/* color hover variants */
.tool-card.blue:hover   { border-color: var(--c-math-accent);    background: var(--c-math-bg); }
.tool-card.green:hover  { border-color: var(--c-finance-accent);  background: var(--c-finance-bg); }
.tool-card.pink:hover   { border-color: var(--c-health-accent);  background: var(--c-health-bg); }
.tool-card.orange:hover { border-color: var(--c-life-accent);    background: var(--c-life-bg); }
.tool-card.cyan:hover   { border-color: var(--c-eng-accent);     background: var(--c-eng-bg); }
/* .ico sizing inside tool-card */
.tool-card .ico { width:40px; height:40px; border-radius:10px; display:grid; place-items:center; font-size:1.1rem; flex-shrink:0; }

/* ===== SPINNER (legacy CalculatorBase compat) ===== */
.btn-loading { position: relative; color: transparent !important; }
.btn-loading::after {
    content: "";
    position: absolute; top: 50%; left: 50%;
    width: 16px; height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid rgba(255,255,255,.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== UTILITY ===== */
.btn-hesapla {
    background: var(--c-math-accent); color: #fff; border: none;
    border-radius: 12px; padding: 13px 24px; font-weight: 700; font-size: 1rem;
    transition: background .15s, transform .1s;
}
.btn-hesapla:hover { background: #1d4ed8; transform: translateY(-1px); color: #fff; }
.btn-hesapla.green  { background: var(--c-finance-accent); }
.btn-hesapla.green:hover  { background: #047857; }
.btn-hesapla.pink   { background: var(--c-health-accent); }
.btn-hesapla.orange  { background: var(--c-life-accent); }
.btn-hesapla.cyan    { background: var(--c-eng-accent); }
.btn-hesapla.purple  { background: var(--c-tech-accent); }
.btn-hesapla.amber   { background: var(--c-edu-accent); }
.btn-hesapla.rose    { background: var(--c-trade-accent); }
.btn-hesapla.fuchsia { background: var(--c-fun-accent); }

/* ===== CAT-GRID (anasayfa 10 kategori ızgarası) ===== */
.cat-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
}
@media (max-width: 1199px) { .cat-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width:  991px) { .cat-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width:  575px) { .cat-grid { grid-template-columns: repeat(2, 1fr); } }

/* ===== CAT-TILE ===== */

.cat-ico{
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, .6);
    backdrop-filter: blur(4px);
    font-size: 1.25rem;
}
.cat-tile {
    position: relative;
    border-radius: 18px;
    padding: 22px 20px 20px;
    text-decoration: none;
    color: var(--ink);
    overflow: hidden;
    transition: transform .18s ease, box-shadow .18s ease;
    border: 1px solid rgba(15,23,42,.04);
    min-height: 168px;
    display: flex; flex-direction: column; justify-content: space-between;
}
.cat-tile:hover { transform: translateY(-3px); box-shadow: 0 14px 30px -18px rgba(15,23,42,.25); }
.cat-tile .icon-box {
    width: 44px; height: 44px; border-radius: 12px;
    display: grid; place-items: center;
    background: rgba(255,255,255,.6);
    font-size: 1.25rem;
}
.cat-tile .name  { font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; margin-top: 14px; }
.cat-tile .meta  { margin-top: 4px; color: rgba(15,23,42,.55); font-size: .85rem; font-weight: 500; }
.cat-tile .arrow {
    position: absolute; right: 16px; bottom: 16px;
    width: 28px; height: 28px; border-radius: 50%;
    display: grid; place-items: center;
    background: rgba(255,255,255,.7);
    font-size: .85rem;
    transition: transform .18s ease;
}
.cat-tile:hover .arrow { transform: translateX(3px); }

.cat-finance { background: linear-gradient(160deg, var(--c-finance-bg), var(--c-finance-bg-2)); color: var(--c-finance-ink); }
.cat-math    { background: linear-gradient(160deg, var(--c-math-bg),    var(--c-math-bg-2));    color: var(--c-math-ink); }
.cat-edu     { background: linear-gradient(160deg, var(--c-edu-bg),     var(--c-edu-bg-2));     color: var(--c-edu-ink); }
.cat-trade   { background: linear-gradient(160deg, var(--c-trade-bg),   var(--c-trade-bg-2));   color: var(--c-trade-ink); }
.cat-health  { background: linear-gradient(160deg, var(--c-health-bg),  var(--c-health-bg-2));  color: var(--c-health-ink); }
.cat-life    { background: linear-gradient(160deg, var(--c-life-bg),    var(--c-life-bg-2));    color: var(--c-life-ink); }
.cat-eng     { background: linear-gradient(160deg, var(--c-eng-bg),     var(--c-eng-bg-2));     color: var(--c-eng-ink); }
.cat-tech    { background: linear-gradient(160deg, var(--c-tech-bg),    var(--c-tech-bg-2));    color: var(--c-tech-ink); }
.cat-fun     { background: linear-gradient(160deg, var(--c-fun-bg),     var(--c-fun-bg-2));     color: var(--c-fun-ink); }
.cat-other   { background: linear-gradient(160deg, var(--c-other-bg),   var(--c-other-bg-2));   color: var(--c-other-ink); }
.cat-tile .icon-box i { color: inherit; }

/* ===== POP-CARD (popüler araçlar) ===== */

 
.pop-card {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 14px;
    background: #fff;
    text-decoration: none; color: var(--ink);
    display: flex; align-items: center; gap: 12px;
    transition: border-color .15s, transform .15s, box-shadow .15s;
}
.pop-card:hover { border-color: #d8def0; transform: translateY(-2px); box-shadow: 0 10px 22px -14px rgba(15,23,42,.18); }
.pop-card .ico { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; flex-shrink: 0; font-size: 1.05rem; }
.pop-card .t   { font-weight: 600; font-size: .95rem; line-height: 1.25; }
.pop-card .s   { color: var(--ink-3); font-size: .78rem; margin-top: 2px; }

/* ===== CALC-CARD (kategori bölüm araç kartları) ===== */
.calc-card {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 16px;
    background: #fff;
    text-decoration: none; color: var(--ink);
    display: block; height: 100%;
    transition: border-color .15s, transform .15s, box-shadow .15s, background .15s;
    position: relative;
}
.calc-card:hover { border-color: transparent; transform: translateY(-2px); box-shadow: 0 14px 28px -18px rgba(15,23,42,.22); }
.calc-card .ico { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; font-size: 1rem; margin-bottom: 12px; }
.calc-card .t  { font-weight: 600; font-size: .98rem; letter-spacing: -.005em; line-height: 1.3; }
.calc-card .s  { color: var(--ink-3); font-size: .8rem; margin-top: 4px; line-height: 1.4; }
.calc-card .go { position: absolute; right: 14px; top: 14px; color: #cbd5e1; font-size: .9rem; transition: color .15s, transform .15s; }
.calc-card:hover .go { color: var(--ink); transform: translate(2px, -2px); }

.calc-card.h-finance:hover { background: var(--c-finance-bg); }
.calc-card.h-math:hover    { background: var(--c-math-bg); }
.calc-card.h-edu:hover     { background: var(--c-edu-bg); }
.calc-card.h-trade:hover   { background: var(--c-trade-bg); }
.calc-card.h-health:hover  { background: var(--c-health-bg); }
.calc-card.h-life:hover    { background: var(--c-life-bg); }
.calc-card.h-eng:hover     { background: var(--c-eng-bg); }
.calc-card.h-tech:hover    { background: var(--c-tech-bg); }
.calc-card.h-fun:hover     { background: var(--c-fun-bg); }
.calc-card.h-other:hover   { background: var(--c-other-bg); }

/* ===== CAT-SECTION / CAT-HEAD ===== */
.cat-section { padding-top: 56px; }
.cat-head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; flex-wrap: wrap; }
.cat-head .badge-ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 1.2rem; }
.cat-head .titles { flex: 1; min-width: 200px; }
.cat-head h2 { font-weight: 800; font-size: 1.5rem; letter-spacing: -0.02em; margin: 0; }
.cat-head .titles p { color: var(--ink-2); margin: 2px 0 0; font-size: .95rem; }
.cat-head .see-all {
    font-weight: 600; font-size: .9rem; text-decoration: none;
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 14px; border-radius: 999px;
    border: 1px solid var(--line); color: var(--ink); background: #fff;
    transition: background .15s, border-color .15s;
}
.cat-head .see-all:hover { background: #f7f8fb; border-color: #d8dde6; }

/* ===== SECTION EYEBROW ===== */
.section-eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--ink-2); font-weight: 600; font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; }
.section-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: #cbd5e1; }
.section-title { font-weight: 800; font-size: clamp(1.35rem, 2.2vw, 1.75rem); letter-spacing: -0.02em; margin: 6px 0 0; }
.section-sub   { color: var(--ink-2); margin-top: 4px; }

/* ===== INTRO (anasayfa üst başlık) ===== */
.intro { padding: 28px 0 8px; }
.intro h1 { font-weight: 800; font-size: clamp(1.4rem, 2.4vw, 2rem); letter-spacing: -0.02em; margin: 0; }
.intro p  { color: var(--ink-2); margin: .35rem 0 0; }

/* ===== HOMEPAGE DESIGN COMPATIBILITY ===== */
.intro .cat-grid {
    margin-top: 24px;
}

.cat-tile .cat-ico {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: rgba(255,255,255,.6);
    backdrop-filter: blur(4px);
    font-size: 1.25rem;
}

.cat-tile > span:last-child {
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
    margin-top: 14px;
}

.cat-tile::after {
    content: "\F138";
    font-family: bootstrap-icons;
    position: absolute;
    right: 16px;
    bottom: 16px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(255,255,255,.7);
    color: currentColor;
    font-size: .85rem;
    transition: transform .18s ease;
}

.cat-tile:hover::after {
    transform: translateX(3px);
}

.pop-card .pop-name,
.pop-card .t {
    font-weight: 600;
    font-size: .95rem;
    line-height: 1.25;
}

.pop-card .pop-desc,
.pop-card .s {
    color: var(--ink-3);
    font-size: .78rem;
    margin-top: 2px;
}

.calc-card .fw-semibold.small,
.calc-card .t {
    font-weight: 600 !important;
    font-size: .98rem;
    letter-spacing: -.005em;
    line-height: 1.3;
}

.calc-card .calc-desc,
.calc-card .s {
    color: var(--ink-3);
    font-size: .8rem;
    margin-top: 4px;
    line-height: 1.4;
}

.calc-card::after {
    content: "\F1C5";
    font-family: bootstrap-icons;
    position: absolute;
    right: 14px;
    top: 14px;
    color: #cbd5e1;
    font-size: .9rem;
    transition: color .15s, transform .15s;
}

.calc-card:hover::after {
    color: var(--ink);
    transform: translate(2px, -2px);
}

.cat-label {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 5px 10px;
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.cat-title {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
    margin: 0;
}