/* ============================================================
   Java & Spring Eğitim Sunumu — Tema
   ============================================================ */
:root {
  --bg-0: #070a14;
  --bg-1: #0b1020;
  --bg-2: #111831;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.18);
  --text: #eef2ff;
  --text-dim: #aab2d5;
  --text-faint: #6b76a3;

  --java: #f7a23b;
  --java-2: #ff7d4d;
  --spring: #6db33f;
  --spring-2: #34d399;
  --boot: #22d3ee;
  --version: #a78bfa;
  --compare: #f472b6;
  --accent: #7c8cff;

  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 24px 70px -24px rgba(0, 0, 0, 0.75);
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-0);
  color: var(--text);
  font-family: "Inter", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0;
  background:
    radial-gradient(900px 600px at 12% -8%, rgba(124, 140, 255, 0.18), transparent 60%),
    radial-gradient(800px 600px at 100% 0%, rgba(34, 211, 238, 0.13), transparent 55%),
    radial-gradient(900px 700px at 50% 120%, rgba(167, 139, 250, 0.14), transparent 60%),
    linear-gradient(180deg, var(--bg-1), var(--bg-0));
}

/* ---------- Progress ---------- */
.progress-track {
  position: fixed; top: 0; left: 0; right: 0; height: 3px;
  background: rgba(255, 255, 255, 0.06); z-index: 60;
}
.progress-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--boot), var(--spring-2));
  transition: width 0.45s cubic-bezier(.4, 0, .2, 1);
  box-shadow: 0 0 16px rgba(124, 140, 255, 0.6);
}

/* ---------- Topbar ---------- */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; height: 58px; z-index: 50;
  display: flex; align-items: center; gap: 14px; padding: 0 18px;
  background: linear-gradient(180deg, rgba(7, 10, 20, 0.85), rgba(7, 10, 20, 0));
  backdrop-filter: blur(6px);
}
.brand { display: flex; align-items: center; gap: 10px; font-family: "Sora", sans-serif; font-weight: 700; letter-spacing: .2px; background: none; border: none; color: var(--text); cursor: pointer; padding: 4px 6px; border-radius: 10px; transition: .18s; }
.brand:hover { background: var(--surface); }
.brand-home { display: inline-grid; place-items: center; color: var(--text-faint); margin-left: 3px; transition: .18s; }
.brand:hover .brand-home { color: var(--accent); transform: translateY(-1px); }
.brand-text em { font-style: normal; color: var(--text-dim); font-weight: 400; }
.brand-dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: conic-gradient(from 0deg, var(--java), var(--spring), var(--boot), var(--version), var(--java));
  box-shadow: 0 0 14px rgba(124, 140, 255, 0.7);
}
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.chip {
  font-size: 12px; padding: 6px 12px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-dim); white-space: nowrap; max-width: 38vw; overflow: hidden; text-overflow: ellipsis;
}
/* ---------- Sunum sayacı (timer) ---------- */
.timer {
  display: flex; align-items: center; gap: 4px;
  padding: 4px 5px 4px 11px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
}
.timer-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--spring-2); box-shadow: 0 0 8px var(--spring-2); animation: timerPulse 2s infinite; }
.timer.paused .timer-dot { background: var(--text-faint); box-shadow: none; animation: none; }
@keyframes timerPulse { 50% { opacity: .35; } }
.timer-time { font-family: var(--mono); font-size: 13.5px; color: var(--text); min-width: 44px; text-align: center; font-variant-numeric: tabular-nums; letter-spacing: .5px; }
.timer.paused .timer-time { color: var(--text-faint); }
.timer-btn { width: 27px; height: 27px; border-radius: 8px; border: 1px solid transparent; background: transparent; color: var(--text-dim); cursor: pointer; font-size: 11px; display: grid; place-items: center; transition: .15s; }
.timer-btn:hover { background: var(--surface-2); color: var(--text); }
#timerReset { font-size: 15px; }
@media (max-width: 760px) { .timer { display: none; } }

.icon-btn {
  width: 38px; height: 38px; border-radius: 11px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  font-size: 16px; display: grid; place-items: center; transition: .18s;
}
.icon-btn:hover { background: var(--surface-2); border-color: var(--border-strong); transform: translateY(-1px); }
.bars, .bars::before, .bars::after {
  content: ""; display: block; width: 16px; height: 2px; border-radius: 2px; background: currentColor; position: relative;
}
.bars::before { position: absolute; top: -5px; } .bars::after { position: absolute; top: 5px; }

/* ---------- Stage / slides ---------- */
.stage {
  position: relative; z-index: 1;
  height: 100%; width: 100%;
  display: grid; align-items: start; justify-items: center;
  grid-template-columns: minmax(0, 1fr);   /* sütun içeriğe göre şişmesin → uzun kod satırları kutuda kayar */
  padding: 84px clamp(18px, 4.5vw, 72px) 88px;
}
.slide {
  width: min(1340px, 100%); min-width: 0; height: 100%; max-height: 100%; min-height: 0;
  display: none; flex-direction: column;
  animation: slideIn .5s cubic-bezier(.16, 1, .3, 1);
}
.slide.active { display: flex; }
.slide.cover, .slide.section-slide { align-self: center; height: auto; }
.slide-scroll { flex: 1 1 auto; min-width: 0; min-height: 0; overflow-y: auto; padding-right: 10px; padding-bottom: 10px; }
/* Yatay taşmayı önle: flex/grid çocukları daralabilsin, taşan içerik kendi içinde kaysın */
.slide-scroll > * { min-width: 0; max-width: 100%; }
.split > *, .twocol > * { min-width: 0; }
.code-wrap, .tbl-wrap { min-width: 0; max-width: 100%; }
pre.code { min-width: 0; }
.slide-scroll::-webkit-scrollbar { width: 8px; }
.slide-scroll::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }

@keyframes slideIn {
  from { opacity: 0; transform: translateY(22px) scale(.985); }
  to { opacity: 1; transform: none; }
}

/* ---------- Eyebrow / titles ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; align-self: flex-start;
  font-size: 12.5px; font-weight: 600; letter-spacing: 1.6px; text-transform: uppercase;
  color: var(--text-dim); padding: 6px 13px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border); margin-bottom: 18px;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.slide h1 {
  font-family: "Sora", sans-serif; font-weight: 800; line-height: 1.05;
  font-size: clamp(30px, 4.6vw, 56px); letter-spacing: -1px; margin-bottom: 14px;
}
.slide h2.s-title {
  font-family: "Sora", sans-serif; font-weight: 700; line-height: 1.1;
  font-size: clamp(26px, 3.5vw, 44px); letter-spacing: -.5px; margin-bottom: 8px;
}
.s-sub { color: var(--text-dim); font-size: clamp(16px, 1.6vw, 21px); line-height: 1.55; max-width: 78ch; margin-bottom: 22px; }
.gradient-text {
  background: linear-gradient(120deg, var(--accent), var(--boot) 45%, var(--spring-2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* ---------- Lead paragraph ---------- */
.lead {
  font-size: clamp(17px, 1.8vw, 22px); line-height: 1.6; color: var(--text);
  border-left: 3px solid var(--accent); padding: 4px 0 4px 18px; margin-bottom: 22px; max-width: 88ch;
}

/* ---------- Framework grid ---------- */
.fw-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; margin-bottom: 6px; }
.fw-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 16px 16px 15px; position: relative; overflow: hidden; transition: .2s;
}
.fw-card:hover { border-color: var(--border-strong); transform: translateY(-3px); background: var(--surface-2); }
.fw-card .fw-ico { font-size: 20px; margin-bottom: 9px; display: block; }
.fw-card .fw-label { font-size: 12px; font-weight: 700; letter-spacing: .8px; text-transform: uppercase; color: var(--text-faint); margin-bottom: 6px; }
.fw-card .fw-text { font-size: 15.5px; line-height: 1.5; color: var(--text); }
.fw-card .fw-text b { color: #fff; }

/* ---------- Bullets ---------- */
.block-title { font-family: "Sora", sans-serif; font-weight: 700; font-size: 18.5px; margin: 16px 0 11px; display: flex; align-items: center; gap: 9px; }
.block-title::before { content: ""; width: 5px; height: 18px; border-radius: 3px; background: var(--accent); }
ul.bullets { list-style: none; display: grid; gap: 9px; }
ul.bullets li { position: relative; padding-left: 26px; font-size: 16.5px; line-height: 1.55; color: var(--text-dim); }
ul.bullets li b, ul.bullets li strong { color: var(--text); font-weight: 600; }
ul.bullets li::before {
  content: ""; position: absolute; left: 4px; top: 9px; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 10px rgba(124, 140, 255, .7);
}

/* ---------- Two-column (pros/cons) ---------- */
.twocol { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 6px 0; }
.col-card { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px 18px; background: var(--surface); }
.col-card.pos { border-color: rgba(52, 211, 153, .3); background: linear-gradient(180deg, rgba(52, 211, 153, .08), transparent); }
.col-card.neg { border-color: rgba(244, 114, 154, .3); background: linear-gradient(180deg, rgba(244, 114, 154, .08), transparent); }
.col-card h4 { font-family: "Sora", sans-serif; font-size: 15px; margin-bottom: 11px; display: flex; align-items: center; gap: 8px; }
.col-card.pos h4 { color: var(--spring-2); }
.col-card.neg h4 { color: var(--compare); }
.col-card ul { list-style: none; display: grid; gap: 8px; }
.col-card li { font-size: 15.5px; line-height: 1.5; color: var(--text-dim); padding-left: 22px; position: relative; }
.col-card.pos li::before { content: "✓"; position: absolute; left: 0; color: var(--spring-2); font-weight: 700; }
.col-card.neg li::before { content: "✕"; position: absolute; left: 0; color: var(--compare); font-weight: 700; }
.col-card li b { color: var(--text); }

/* ---------- Code ---------- */
.code-wrap { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; margin: 6px 0; background: #0a0e1c; }
.code-head { display: flex; align-items: center; gap: 8px; padding: 9px 14px; border-bottom: 1px solid var(--border); background: rgba(255,255,255,.025); }
.code-dots { display: flex; gap: 6px; }
.code-dots i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.code-dots i:nth-child(1) { background: #ff5f57; } .code-dots i:nth-child(2) { background: #febc2e; } .code-dots i:nth-child(3) { background: #28c840; }
.code-cap { font-family: var(--mono); font-size: 12px; color: var(--text-faint); margin-left: 6px; }
pre.code { margin: 0; padding: 15px 18px; overflow-x: auto; font-family: var(--mono); font-size: 14.3px; line-height: 1.62; color: #d6def5; }
pre.code::-webkit-scrollbar { height: 8px; } pre.code::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
.tok-key { color: #c792ea; } .tok-type { color: #82aaff; } .tok-str { color: #c3e88d; }
.tok-num { color: #f78c6c; } .tok-com { color: #5a6488; font-style: italic; } .tok-ann { color: #ffcb6b; } .tok-fn { color: #82d2ff; }

/* ---------- Table ---------- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); margin: 6px 0; }
table.cmp { width: 100%; border-collapse: collapse; font-size: 15px; }
table.cmp th, table.cmp td { padding: 11px 15px; text-align: left; border-bottom: 1px solid var(--border); }
table.cmp thead th { background: rgba(255,255,255,.05); font-family: "Sora", sans-serif; font-weight: 600; font-size: 13px; color: var(--text); position: sticky; top: 0; }
table.cmp tbody tr:hover { background: rgba(255,255,255,.025); }
table.cmp td:first-child { font-weight: 600; color: var(--text); }
table.cmp td { color: var(--text-dim); }
table.cmp tbody tr:last-child td { border-bottom: none; }

/* ---------- Callout ---------- */
.callout { border-radius: var(--radius-sm); padding: 14px 18px; margin: 8px 0; border: 1px solid var(--border); display: flex; gap: 13px; align-items: flex-start; background: var(--surface); }
.callout .ic { font-size: 19px; line-height: 1; margin-top: 1px; }
.callout .ct { font-size: 15.5px; line-height: 1.55; color: var(--text-dim); }
.callout .ct b { color: var(--text); }
.callout.info { border-color: rgba(124,140,255,.35); background: linear-gradient(180deg, rgba(124,140,255,.09), transparent); }
.callout.warn { border-color: rgba(247,162,59,.38); background: linear-gradient(180deg, rgba(247,162,59,.09), transparent); }
.callout.tip { border-color: rgba(52,211,153,.35); background: linear-gradient(180deg, rgba(52,211,153,.08), transparent); }
.callout.key { border-color: rgba(244,114,182,.35); background: linear-gradient(180deg, rgba(244,114,182,.08), transparent); }
.callout.real { border-color: rgba(34,211,238,.35); background: linear-gradient(180deg, rgba(34,211,238,.09), transparent); }
.callout.analogy { border-color: rgba(196,146,255,.4); background: linear-gradient(180deg, rgba(196,146,255,.1), transparent); }
.callout.analogy .ct b { color: #dcc9ff; }

/* ---------- Soru & Cevap (interaktif: tıkla → cevap) ---------- */
.qa-wrap { margin: 14px 0 4px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); overflow: hidden; background: linear-gradient(180deg, rgba(124,140,255,.06), transparent); }
.qa-head { display: flex; align-items: center; gap: 10px; padding: 11px 16px; font-family: "Sora", sans-serif; font-weight: 700; font-size: 14px; color: var(--text); border-bottom: 1px solid var(--border); background: rgba(124,140,255,.08); }
.qa-badge { font-size: 11px; font-weight: 700; letter-spacing: .5px; padding: 3px 9px; border-radius: 999px; background: var(--accent); color: #0a0e1c; }
.qa-hint { font-family: "Inter", sans-serif; font-weight: 500; font-size: 11.5px; color: var(--text-faint); letter-spacing: .2px; }
.qa-all { margin-left: auto; font-family: "Inter", sans-serif; font-size: 12px; font-weight: 600; color: var(--text-dim); background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; cursor: pointer; transition: .18s; }
.qa-all:hover { color: var(--text); border-color: var(--border-strong); background: rgba(124,140,255,.14); }
.qa-item { padding: 0; border-bottom: 1px solid var(--border); }
.qa-item:last-child { border-bottom: none; }
.qa-q, .qa-a { display: flex; gap: 11px; align-items: flex-start; line-height: 1.5; }
.qa-q { width: 100%; text-align: left; font-family: inherit; background: none; border: none; cursor: pointer; font-weight: 600; color: var(--text); font-size: 15.8px; padding: 13px 16px; transition: background .16s; }
.qa-q:hover { background: rgba(124,140,255,.07); }
.qa-q:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.qa-qtext { flex: 1; }
.qa-toggle { flex-shrink: 0; font-size: 17px; color: var(--accent); font-weight: 700; line-height: 1; margin-top: 1px; transition: transform .2s; }
.qa-item.open .qa-toggle { transform: rotate(180deg); }
.qa-a { padding: 0 16px 14px 16px; margin-top: -2px; color: var(--text-dim); font-size: 15.5px; animation: qaReveal .28s cubic-bezier(.16,1,.3,1); }
.qa-a[hidden] { display: none; }
.qa-a b { color: var(--text); }
@keyframes qaReveal { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: none; } }
.qa-mark { flex-shrink: 0; width: 22px; height: 22px; border-radius: 7px; display: grid; place-items: center; font-size: 12px; font-weight: 700; font-family: "Sora", sans-serif; margin-top: 1px; }
.qa-mark.q { background: rgba(124,140,255,.22); color: #aeb8ff; border: 1px solid rgba(124,140,255,.4); }
.qa-mark.a { background: rgba(52,211,153,.18); color: var(--spring-2); border: 1px solid rgba(52,211,153,.4); }

/* ---------- Kavram Künyesi (concept) ---------- */
.concept { margin: 12px 0; border: 1px solid rgba(124,140,255,.32); border-radius: var(--radius-sm); overflow: hidden; background: linear-gradient(180deg, rgba(124,140,255,.07), transparent); }
.concept-head { display: flex; align-items: center; gap: 11px; padding: 10px 16px; border-bottom: 1px solid var(--border); background: rgba(124,140,255,.08); }
.concept-badge { font-size: 10.5px; font-weight: 800; letter-spacing: 1.2px; padding: 3px 10px; border-radius: 999px; background: linear-gradient(120deg, var(--accent), var(--boot)); color: #0a0e1c; }
.concept-term { font-family: "Sora", sans-serif; font-weight: 700; font-size: 16px; color: var(--text); }
.concept-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 820px) { .concept-grid { grid-template-columns: 1fr; } }
.concept-cell { padding: 14px 16px; border-right: 1px solid var(--border); }
.concept-cell:last-child { border-right: none; }
@media (max-width: 820px) { .concept-cell { border-right: none; border-bottom: 1px solid var(--border); } .concept-cell:last-child { border-bottom: none; } }
.concept-k { display: flex; align-items: center; gap: 7px; font-family: "Sora", sans-serif; font-weight: 700; font-size: 12.5px; letter-spacing: .3px; text-transform: uppercase; margin-bottom: 7px; }
.concept-cell.what .concept-k { color: #aeb8ff; }
.concept-cell.origin .concept-k { color: #ffcb6b; }
.concept-cell.use .concept-k { color: var(--spring-2); }
.concept-ic { font-size: 15px; }
.concept-v { font-size: 15px; line-height: 1.55; color: var(--text-dim); }
.concept-v b { color: var(--text); }

/* ---------- Bölüm özeti (recap) ---------- */
.recap { margin: 14px 0 4px; border: 1px solid rgba(52,211,153,.32); border-radius: var(--radius-sm); overflow: hidden; background: linear-gradient(180deg, rgba(52,211,153,.08), transparent); }
.recap-head { display: flex; align-items: center; gap: 10px; padding: 12px 18px; font-family: "Sora", sans-serif; font-weight: 700; font-size: 16px; color: var(--text); border-bottom: 1px solid var(--border); }
.recap-ic { font-size: 19px; }
.recap-list { list-style: none; counter-reset: rc; display: grid; gap: 0; }
.recap-list li { counter-increment: rc; position: relative; padding: 12px 18px 12px 52px; border-bottom: 1px solid var(--border); font-size: 15.5px; line-height: 1.5; color: var(--text-dim); }
.recap-list li:last-child { border-bottom: none; }
.recap-list li b { color: var(--text); }
.recap-list li::before { content: counter(rc); position: absolute; left: 16px; top: 11px; width: 24px; height: 24px; border-radius: 8px; display: grid; place-items: center; font-family: "Sora", sans-serif; font-weight: 700; font-size: 12.5px; color: var(--spring-2); background: rgba(52,211,153,.16); border: 1px solid rgba(52,211,153,.4); }

/* ---------- Terim sözlüğü (glossary) ---------- */
.gloss { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 22px; margin: 8px 0; }
@media (max-width: 820px) { .gloss { grid-template-columns: 1fr; } }
.gloss-item { display: grid; grid-template-columns: minmax(120px, auto) 1fr; gap: 12px; align-items: baseline; padding: 8px 0; border-bottom: 1px solid var(--border); }
.gloss-term { font-family: var(--mono); font-size: 13.5px; font-weight: 600; color: #82aaff; }
.gloss-def { font-size: 14.5px; line-height: 1.45; color: var(--text-dim); }
.gloss-def b { color: var(--text); }

/* ---------- Tags ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.tag { font-size: 12.5px; padding: 6px 12px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim); font-family: var(--mono); }
.tag b { color: var(--text); }

/* ---------- Mini stat cards ---------- */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin: 8px 0; }
.stat { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; background: var(--surface); text-align: center; }
.stat .big { font-family: "Sora", sans-serif; font-weight: 800; font-size: clamp(24px, 3vw, 34px); background: linear-gradient(120deg, var(--accent), var(--boot)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat .lbl { font-size: 12.5px; color: var(--text-faint); margin-top: 5px; }

/* ---------- Two-up columns generic ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: start; }
@media (max-width: 860px) { .split, .twocol { grid-template-columns: 1fr; } }

/* ============================================================
   SECTION DIVIDER
   ============================================================ */
.slide.section-slide { align-items: flex-start; justify-content: center; }
.sec-index { font-family: "Sora", sans-serif; font-weight: 800; font-size: clamp(60px, 13vw, 150px); line-height: .9; letter-spacing: -4px; opacity: .14; }
.sec-kicker { font-size: 14px; letter-spacing: 3px; text-transform: uppercase; color: var(--text-dim); margin: 14px 0 10px; }
.sec-title { font-family: "Sora", sans-serif; font-weight: 800; font-size: clamp(34px, 6vw, 72px); line-height: 1.02; letter-spacing: -1.5px; }
.sec-desc { color: var(--text-dim); font-size: clamp(15px, 1.7vw, 20px); line-height: 1.6; margin-top: 18px; max-width: 64ch; }
.sec-topics { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.sec-topics span { font-size: 13px; padding: 7px 14px; border-radius: 999px; border: 1px solid var(--border-strong); background: var(--surface); color: var(--text-dim); }

/* ============================================================
   TITLE / COVER
   ============================================================ */
.cover { text-align: center; align-items: center; }
.cover .kbox { display: inline-flex; gap: 10px; margin-bottom: 26px; flex-wrap: wrap; justify-content: center; }
.cover .kbox span { font-size: 13px; padding: 8px 15px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); color: var(--text-dim); }
.cover h1 { font-size: clamp(40px, 8vw, 92px); letter-spacing: -2.5px; }
.cover .tagline { font-size: clamp(16px, 2.2vw, 24px); color: var(--text-dim); margin: 18px 0 30px; line-height: 1.5; }
.cover .meta { display: flex; gap: 28px; justify-content: center; flex-wrap: wrap; color: var(--text-faint); font-size: 14px; }
.cover .meta b { color: var(--text); display: block; font-family: "Sora", sans-serif; font-size: 22px; margin-bottom: 2px; }
.cover .startcue { margin-top: 36px; color: var(--text-faint); font-size: 14px; animation: pulse 2.2s infinite; }
@keyframes pulse { 50% { opacity: .45; } }

/* ============================================================
   YOL HARİTASI (ROADMAP) — animasyonlu
   ============================================================ */
.roadmap-slide .slide-scroll { display: flex; flex-direction: column; align-items: center; text-align: center; }
.roadmap-slide .eyebrow { align-self: center; }
.roadmap-slide .s-sub { max-width: 82ch; }
.rm-grid {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; align-items: start;
  position: relative; width: 100%; margin: 26px 0 8px; padding-top: 10px;
}
.rm-grid::before {
  content: ""; position: absolute; top: 44px; left: 7%; right: 7%; height: 3px; z-index: 0; border-radius: 3px;
  background: linear-gradient(90deg, var(--java), var(--version), var(--spring), var(--boot), var(--compare), var(--boot));
  box-shadow: 0 0 16px rgba(124, 140, 255, .4);
  transform: scaleX(0); transform-origin: left;
}
.slide.active .rm-grid::before { animation: rmDraw 1s .15s cubic-bezier(.4, 0, .2, 1) forwards; }
@keyframes rmDraw { to { transform: scaleX(1); } }

.rm-stop {
  position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: 0 6px; background: none; border: none; cursor: pointer; color: inherit; font: inherit;
  opacity: 0; transform: translateY(20px);
}
.slide.active .rm-stop { animation: rmPop .55s cubic-bezier(.16, 1, .3, 1) forwards; }
@keyframes rmPop { to { opacity: 1; transform: none; } }

.rm-node {
  width: 66px; height: 66px; border-radius: 50%; display: grid; place-items: center; position: relative;
  font-size: 28px; border: 2px solid var(--rm-c);
  background: radial-gradient(circle at 32% 28%, color-mix(in srgb, var(--rm-c) 34%, transparent), color-mix(in srgb, var(--rm-c) 8%, #0b1020));
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--rm-c) 8%, transparent), 0 0 26px color-mix(in srgb, var(--rm-c) 45%, transparent);
  transition: transform .2s, box-shadow .2s;
}
.slide.active .rm-node { animation: rmFloat 3.4s ease-in-out infinite; }
.rm-stop:nth-child(even) .rm-node { animation-delay: -1.7s; }
@keyframes rmFloat { 50% { transform: translateY(-7px); } }
.rm-stop:hover .rm-node { transform: scale(1.09) translateY(-2px); box-shadow: 0 0 0 7px color-mix(in srgb, var(--rm-c) 14%, transparent), 0 0 38px color-mix(in srgb, var(--rm-c) 65%, transparent); }
.rm-ico { filter: drop-shadow(0 2px 6px rgba(0, 0, 0, .45)); }
.rm-num {
  position: absolute; top: -7px; right: -7px; width: 23px; height: 23px; border-radius: 50%;
  font-family: var(--mono); font-size: 11px; font-weight: 700; display: grid; place-items: center;
  background: var(--bg-2); color: var(--rm-c); border: 1.5px solid var(--rm-c);
}
.rm-ttl { margin-top: 15px; font-family: "Sora", sans-serif; font-weight: 700; font-size: 14.5px; line-height: 1.2; color: var(--text); max-width: 15ch; }
.rm-stop:hover .rm-ttl { color: #fff; }
.rm-desc { margin-top: 4px; font-size: 11.5px; color: var(--text-faint); font-family: var(--mono); }
.rm-subs { list-style: none; margin: 13px 0 0; padding: 11px 8px 4px; display: grid; gap: 6px; width: 100%; border-top: 1px dashed var(--border-strong); }
.rm-subs li { font-size: 11.8px; line-height: 1.25; color: var(--text-dim); position: relative; padding-left: 13px; text-align: left; }
.rm-subs li::before { content: ""; position: absolute; left: 1px; top: 6px; width: 5px; height: 5px; border-radius: 50%; background: var(--rm-c); box-shadow: 0 0 6px var(--rm-c); }
.rm-stop:hover .rm-subs li { color: var(--text); }
.rm-hint-line { text-align: center; margin-top: 22px; font-size: 13px; color: var(--text-faint); }
.rm-hint-line b { color: var(--text-dim); }
@media (max-width: 920px) {
  .rm-grid { grid-template-columns: repeat(3, 1fr); gap: 22px 6px; }
  .rm-grid::before { display: none; }
}
.rm-more-li { padding-left: 0 !important; margin-top: 3px; }
.rm-subs li.rm-more-li::before { display: none; }
.rm-more {
  background: color-mix(in srgb, var(--rm-c) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--rm-c) 48%, transparent);
  color: var(--rm-c); cursor: pointer; font: inherit; font-size: 11.5px; font-weight: 600;
  padding: 4px 11px; border-radius: 999px; transition: .15s; letter-spacing: .3px;
}
.rm-more:hover { background: color-mix(in srgb, var(--rm-c) 30%, transparent); }

/* ---------- Tüm başlıklar modalı ---------- */
.topics-modal { position: fixed; inset: 0; z-index: 95; background: rgba(7, 10, 20, .62); backdrop-filter: blur(5px); display: none; align-items: center; justify-content: center; padding: 24px; }
.topics-modal.show { display: flex; }
.tm-box { width: min(840px, 100%); max-height: 82vh; display: flex; flex-direction: column; background: linear-gradient(180deg, var(--bg-2), var(--bg-1)); border: 1px solid var(--border-strong); border-radius: 16px; box-shadow: var(--shadow); overflow: hidden; animation: slideIn .35s cubic-bezier(.16, 1, .3, 1); }
.tm-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.tm-head h3 { font-family: "Sora", sans-serif; font-size: 18px; }
.tm-list { overflow-y: auto; padding: 14px; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px; }
.tm-list::-webkit-scrollbar { width: 8px; } .tm-list::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
.tm-item { text-align: left; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 9px 12px; color: var(--text-dim); cursor: pointer; font: inherit; font-size: 13.5px; display: flex; align-items: center; gap: 9px; transition: .15s; }
.tm-item:hover { background: var(--surface-2); color: var(--text); border-color: var(--border-strong); transform: translateY(-1px); }
.tm-item .tm-no { font-family: var(--mono); font-size: 11px; color: var(--text-faint); min-width: 20px; }

/* ============================================================
   SIDEBAR / AGENDA
   ============================================================ */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; width: 340px; max-width: 86vw; z-index: 80;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border-right: 1px solid var(--border); box-shadow: var(--shadow);
  transform: translateX(-104%); transition: transform .35s cubic-bezier(.16,1,.3,1);
  display: flex; flex-direction: column;
}
.sidebar.open { transform: none; }
.sidebar-head { display: flex; align-items: center; justify-content: space-between; padding: 18px 18px 14px; font-family: "Sora", sans-serif; font-weight: 700; font-size: 16px; border-bottom: 1px solid var(--border); }
.agenda { overflow-y: auto; padding: 10px 10px 30px; }
.agenda::-webkit-scrollbar { width: 8px; } .agenda::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
.ag-group { margin-bottom: 6px; }
.ag-cat { font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-faint); padding: 12px 12px 6px; font-weight: 700; }
.ag-item {
  display: flex; align-items: center; gap: 11px; padding: 9px 12px; border-radius: 10px; cursor: pointer;
  color: var(--text-dim); font-size: 14px; transition: .15s; border: 1px solid transparent;
}
.ag-item:hover { background: var(--surface); color: var(--text); }
.ag-item.current { background: var(--surface-2); color: var(--text); border-color: var(--border-strong); }
.ag-item .ag-ico { width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; font-size: 14px; background: var(--surface-2); flex-shrink: 0; }
.ag-item .ag-no { margin-left: auto; font-size: 11px; color: var(--text-faint); font-family: var(--mono); }
.scrim { position: fixed; inset: 0; background: rgba(3, 5, 12, .55); z-index: 70; opacity: 0; pointer-events: none; transition: .3s; backdrop-filter: blur(2px); }
.scrim.show { opacity: 1; pointer-events: auto; }

/* ============================================================
   OVERVIEW GRID
   ============================================================ */
.overview { position: fixed; inset: 0; z-index: 90; background: rgba(7, 10, 20, .96); backdrop-filter: blur(10px); display: none; flex-direction: column; padding: 22px; }
.overview.show { display: flex; }
.overview-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.overview-head h2 { font-family: "Sora", sans-serif; font-size: 22px; }
.overview-grid { display: flex; flex-direction: column; gap: 24px; overflow-y: auto; padding-right: 6px; }
.ov-group-head { display: flex; align-items: center; gap: 11px; margin-bottom: 12px; padding-bottom: 9px; border-bottom: 1px solid var(--border); }
.ov-group-ico { width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center; font-size: 16px; background: color-mix(in srgb, var(--g-c) 18%, transparent); border: 1px solid color-mix(in srgb, var(--g-c) 42%, transparent); }
.ov-group-ttl { font-family: "Sora", sans-serif; font-weight: 700; font-size: 16.5px; color: var(--text); }
.ov-group-count { margin-left: auto; font-size: 12px; color: var(--text-faint); font-family: var(--mono); }
.ov-group-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.ov-card {
  min-height: 118px; border: 1px solid var(--border); border-radius: 12px; padding: 13px 13px 16px; cursor: pointer;
  background: var(--surface); overflow: hidden; position: relative; transition: .18s; display: flex; flex-direction: column;
}
.ov-card:hover { border-color: var(--accent); transform: translateY(-3px); background: var(--surface-2); }
.ov-card.current { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(124,140,255,.4); }
.ov-card .ov-no { font-family: var(--mono); font-size: 11px; color: var(--text-faint); }
.ov-card .ov-cat { font-size: 10px; letter-spacing: 1px; text-transform: uppercase; color: var(--text-faint); margin-top: 4px; }
.ov-card .ov-t { font-family: "Sora", sans-serif; font-weight: 600; font-size: 14px; line-height: 1.25; margin-top: 6px; color: var(--text); display: -webkit-box; -webkit-line-clamp: 3; line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.ov-card .ov-bar { position: absolute; left: 0; bottom: 0; height: 4px; width: 100%; }

/* ============================================================
   CONTROLS
   ============================================================ */
.controls { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); z-index: 50; display: flex; align-items: center; gap: 14px; padding: 7px 9px; border-radius: 999px; background: rgba(11, 16, 32, .8); border: 1px solid var(--border); backdrop-filter: blur(10px); box-shadow: var(--shadow); }
.nav-btn { width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: 22px; cursor: pointer; display: grid; place-items: center; transition: .18s; }
.nav-btn:hover { background: var(--accent); border-color: var(--accent); transform: scale(1.06); }
.nav-btn:disabled { opacity: .3; cursor: default; transform: none; background: var(--surface); }
.counter { font-family: var(--mono); font-size: 14px; color: var(--text-dim); min-width: 58px; text-align: center; }
.counter .sep { color: var(--text-faint); margin: 0 2px; } .counter #curNo { color: var(--text); }
.hint { position: fixed; bottom: 18px; right: 20px; z-index: 50; font-size: 12px; color: var(--text-faint); background: var(--surface); border: 1px solid var(--border); padding: 7px 12px; border-radius: 999px; backdrop-filter: blur(8px); transition: opacity .5s; }
.hint b { color: var(--text-dim); }
@media (max-width: 760px) { .hint { display: none; } .chip { display: none; } }

/* category accent helpers */
[data-cat="java"] .eyebrow .dot, [data-cat="java"] ul.bullets li::before, [data-cat="java"] .block-title::before { background: var(--java); }
[data-cat="java"] .lead { border-color: var(--java); }
[data-cat="version"] .eyebrow .dot, [data-cat="version"] ul.bullets li::before, [data-cat="version"] .block-title::before { background: var(--version); }
[data-cat="version"] .lead { border-color: var(--version); }
[data-cat="spring"] .eyebrow .dot, [data-cat="spring"] ul.bullets li::before, [data-cat="spring"] .block-title::before { background: var(--spring); }
[data-cat="spring"] .lead { border-color: var(--spring); }
[data-cat="boot"] .eyebrow .dot, [data-cat="boot"] ul.bullets li::before, [data-cat="boot"] .block-title::before { background: var(--boot); }
[data-cat="boot"] .lead { border-color: var(--boot); }
[data-cat="compare"] .eyebrow .dot, [data-cat="compare"] ul.bullets li::before, [data-cat="compare"] .block-title::before { background: var(--compare); }
[data-cat="compare"] .lead { border-color: var(--compare); }

/* ============================================================
   RESPONSIVE  —  büyük ekran → dizüstü → tablet → telefon
   (mevcut dağınık media query'lerin üstüne yazan bütünsel katman)
   ============================================================ */

/* ---- Çok büyük ekranlar: içeriği ve boşlukları biraz genişlet ---- */
@media (min-width: 1720px) {
  .slide { width: min(1520px, 90%); }
  .stage { padding-top: 94px; padding-bottom: 98px; }
}

/* ---- Küçük dizüstü / tablet yatay ---- */
@media (max-width: 1024px) {
  .stage { padding: 80px clamp(16px, 3.4vw, 46px) 84px; }
  .fw-grid { gap: 12px; }
  .split { gap: 18px; }
}

/* ---- Tablet dikey ---- */
@media (max-width: 768px) {
  .stage { padding: 74px 18px 84px; }
  .slide h1 { margin-bottom: 12px; }
  .s-sub { margin-bottom: 18px; }
  .eyebrow { margin-bottom: 14px; }
  .fw-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
  .stat-row { grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); }
  .tm-list { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); }
}

/* ---- Telefon ---- */
@media (max-width: 560px) {
  /* Topbar sıkışıklığını çöz */
  .topbar { height: 52px; padding: 0 12px; gap: 8px; }
  .brand { padding: 4px; gap: 8px; font-size: 14px; }
  .brand-text em { display: none; }      /* "Eğitim" kelimesini gizle */
  .brand-home { display: none; }
  .brand-dot { width: 10px; height: 10px; }
  .topbar-right { gap: 7px; }
  .icon-btn { width: 34px; height: 34px; border-radius: 10px; font-size: 15px; }

  /* Slayt sahnesi: dikey boşluğu geri kazan */
  .stage { padding: 60px 13px 72px; }
  .slide-scroll { padding-right: 4px; }

  /* Tipografi yoğunluğu */
  .lead { font-size: 16px; padding-left: 14px; margin-bottom: 16px; }
  .block-title { font-size: 16.5px; margin: 14px 0 9px; }
  ul.bullets li { font-size: 15px; padding-left: 22px; }
  .fw-card { padding: 13px 13px 12px; }
  .fw-card .fw-text { font-size: 14.5px; }
  .callout { padding: 12px 14px; gap: 10px; }
  .callout .ct { font-size: 14.5px; }
  .qa-head { padding: 10px 13px; font-size: 13px; flex-wrap: wrap; }
  .qa-q { font-size: 14.8px; padding: 12px 13px; }
  .qa-a { font-size: 14.5px; padding: 0 13px 12px; }
  .concept-v, .col-card li { font-size: 14.5px; }
  .recap-list li { font-size: 14.8px; padding: 11px 14px 11px 46px; }
  .recap-list li::before { left: 13px; }
  pre.code { font-size: 12.8px; padding: 13px 14px; line-height: 1.55; }
  .code-cap { font-size: 10.5px; }
  table.cmp { font-size: 13.5px; }
  table.cmp th, table.cmp td { padding: 9px 11px; }

  /* Kart ızgaraları telefonda daha yoğun */
  .stat-row { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat { padding: 13px; }
  .ov-group-grid { grid-template-columns: repeat(auto-fill, minmax(138px, 1fr)); gap: 9px; }
  .overview { padding: 16px; }
  .tm-list { grid-template-columns: 1fr; }
  .topics-modal { padding: 16px; }

  /* Alt kontroller */
  .controls { bottom: 12px; gap: 10px; padding: 6px 8px; }
  .nav-btn { width: 38px; height: 38px; font-size: 20px; }
  .counter { min-width: 50px; font-size: 13px; }

  /* Yol haritası: 2 sütun, küçük düğümler, alt maddeler gizli */
  .rm-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 12px; margin-top: 18px; }
  .rm-node { width: 56px; height: 56px; font-size: 24px; }
  .rm-num { width: 20px; height: 20px; font-size: 10px; }
  .rm-ttl { font-size: 13px; margin-top: 11px; max-width: 18ch; }
  .rm-desc { font-size: 11px; }
  .rm-subs { display: none; }
  .rm-hint-line { margin-top: 16px; font-size: 12px; }

  /* Kapak & bölüm ayracı */
  .cover .kbox { margin-bottom: 20px; }
  .cover .tagline { margin: 14px 0 24px; }
  .cover .meta { gap: 18px; }
  .cover .startcue { margin-top: 26px; }
  .sec-topics { gap: 7px; margin-top: 18px; }
  .sec-topics span { font-size: 12px; padding: 6px 11px; }
  .sec-desc { margin-top: 14px; }
}

/* ---- Küçük telefon ---- */
@media (max-width: 380px) {
  .stage { padding: 58px 10px 70px; }
  .brand-text { font-size: 13px; }
  .rm-grid { grid-template-columns: 1fr; gap: 16px; }
  .rm-node { width: 60px; height: 60px; }
  .rm-ttl { max-width: none; }
  .fw-grid { grid-template-columns: 1fr; }
}

/* ---- Kısa / yatay ekranlar (yükseklik az: yatay telefon) ---- */
@media (max-height: 500px) and (orientation: landscape) {
  .topbar { height: 46px; }
  .stage { padding-top: 58px; padding-bottom: 62px; }
  .controls { bottom: 8px; }
  .cover .startcue { display: none; }
}