/*
 * ════════════════════════════════════════════════════════════════
 *  TUTORIAL.CSS  ·  embedded-deck/assets/tutorial.css
 * ════════════════════════════════════════════════════════════════
 *
 *  IBM Plex / near-black / periwinkle theme — ana portföyle uyumlu.
 *  Kullanım (tutorial sayfalarından):
 *    <link rel="stylesheet" href="/embedded-deck/assets/tutorial.css">
 *
 * ════════════════════════════════════════════════════════════════
 */

:root {
  --bg:           #0b0d10;
  --bg-elevated:  #0f1216;
  --bg-code:      #0d1117;
  --border:       #1c2026;
  --border-strong:#2a2f37;
  --text:         #e6e8eb;
  --text-body:    #c8ccd1;
  --text-dim:     #8b9098;
  --text-faint:   #5a6068;
  --accent:       #9ab6ff;   /* periwinkle — tek vurgu rengi */
  --accent-dim:   #5a7acc;
  --warn:         #d4a04a;   /* muted amber — semantik kalır */
  --danger:       #cc5555;   /* muted red   — semantik kalır */
  --cmd:          #9ab6ff;   /* = accent */
  --string:       #c8a96e;   /* muted gold */
  --comment:      #5a6068;   /* = text-faint */
  --keyword:      #b07dcc;   /* muted lila */
}

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

html {
  scroll-behavior: smooth;
}

::selection {
  background: var(--border-strong);
  color: var(--text);
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-strong); }

body {
  background: var(--bg);
  color: var(--text-body);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.75;
  padding: 48px 36px 120px;
  max-width: 980px;
  margin: 0 auto;
  -webkit-font-smoothing: antialiased;
}

/* ─── BACK NAV ─────────────────────────────────────────────── */
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'IBM Plex Mono', monospace;
  color: var(--text-faint);
  text-decoration: none;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 40px;
  transition: color 0.12s;
}

.nav-link::before { content: "←  "; }
.nav-link:hover { color: var(--accent); }

/* ─── HEADER ────────────────────────────────────────────────── */
.header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 36px;
  margin-bottom: 60px;
}

.header .meta {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--text-faint);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.header h1 {
  font-family: 'IBM Plex Serif', serif;
  font-size: clamp(36px, 6vw, 58px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 16px;
}

.header h1 em {
  font-style: italic;
  color: var(--text);
  font-weight: 400;
}

.header .subtitle {
  color: var(--text-dim);
  font-size: 14.5px;
  max-width: 640px;
  line-height: 1.75;
}

/* ─── SECTIONS ──────────────────────────────────────────────── */
section {
  margin-top: 72px;
}

h2 {
  font-family: 'IBM Plex Serif', serif;
  font-size: 26px;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: 16px;
}

h2 .num {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

h2 + .section-lead {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 28px;
  max-width: 720px;
}

h3 {
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-top: 32px;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

h3::before {
  content: "› ";
  color: var(--accent);
}

p {
  color: var(--text-body);
  margin-bottom: 16px;
  max-width: 760px;
}

p.dim {
  color: var(--text-dim);
}

code.inline {
  background: var(--bg-elevated);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 12.5px;
  border: 1px solid var(--border);
  font-family: 'IBM Plex Mono', monospace;
}

strong {
  color: var(--text);
  font-weight: 600;
}

em {
  color: var(--warn);
  font-style: normal;
}

/* ─── CODE BLOCKS ───────────────────────────────────────────── */
.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 4px;
  margin: 20px 0;
  position: relative;
  overflow: hidden;
}

.code-block .code-header {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  padding: 7px 16px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10.5px;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
  align-items: center;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.code-block .code-header .dot {
  color: var(--accent);
  font-size: 14px;
  line-height: 1;
}

.code-block pre {
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.65;
}

.code-block pre code {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--text-body);
  white-space: pre;
}

/* ─── SYNTAX HIGHLIGHTING ───────────────────────────────────── */
.cmd     { color: var(--cmd); font-weight: 500; }
.flag    { color: var(--keyword); }
.str     { color: var(--string); }
.cmt     { color: var(--comment); font-style: italic; }
.ok      { color: var(--accent); }
.err     { color: var(--danger); }
.warn    { color: var(--warn); }
.path    { color: var(--text-dim); }
.keyword { color: var(--keyword); }
.field   { color: var(--accent); font-weight: 600; }

/* ─── CALLOUT BOXES ─────────────────────────────────────────── */
.callout {
  border-left: 2px solid var(--accent);
  background: var(--bg-elevated);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 3px 3px 0;
}

.callout.warn   { border-left-color: var(--warn); }
.callout.danger { border-left-color: var(--danger); }

.callout .label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
  font-weight: 600;
}

.callout.warn .label   { color: var(--warn); }
.callout.danger .label { color: var(--danger); }

.callout p {
  margin: 0;
  color: var(--text-body);
  font-size: 13.5px;
}

/* ─── TABLES ────────────────────────────────────────────────── */
.file-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 12.5px;
  font-family: 'IBM Plex Mono', monospace;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.file-table th {
  text-align: left;
  padding: 10px 16px;
  background: var(--bg-elevated);
  color: var(--text-faint);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

.file-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-body);
  vertical-align: top;
}

.file-table tr:last-child td { border-bottom: none; }

.file-table td:first-child {
  color: var(--cmd);
  font-weight: 500;
  white-space: nowrap;
}

.file-table td.secret { color: var(--danger); }
.file-table td.public { color: var(--accent); }
.file-table td.warn   { color: var(--warn); }

/* ─── PARAM LIST ────────────────────────────────────────────── */
.params {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 16px 20px;
  margin: 16px 0;
  font-family: 'IBM Plex Mono', monospace;
}

.params .param {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  padding: 6px 0;
  font-size: 12.5px;
  border-bottom: 1px solid var(--border);
}

.params .param:last-child { border-bottom: none; }

.params .param .name {
  color: var(--keyword);
  font-weight: 500;
}

.params .param .desc {
  color: var(--text-dim);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
}

@media (max-width: 600px) {
  .params .param {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 10px 0;
  }
}

/* ─── FLOW DIAGRAM ──────────────────────────────────────────── */
.flow {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 24px;
  margin: 20px 0;
  overflow-x: auto;
}

.flow pre {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-body);
  white-space: pre;
}

.flow .step-num { color: var(--accent); font-weight: 600; }
.flow .accent   { color: var(--accent); font-weight: 600; }

/* ─── TOC ───────────────────────────────────────────────────── */
.toc {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 24px 28px;
  margin-bottom: 60px;
}

.toc .toc-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 16px;
  font-weight: 500;
}

.toc ol {
  list-style: none;
  counter-reset: toc-counter;
}

.toc li {
  counter-increment: toc-counter;
  padding: 5px 0;
  font-size: 13px;
}

.toc li::before {
  content: counter(toc-counter, decimal-leading-zero) " ";
  font-family: 'IBM Plex Mono', monospace;
  color: var(--accent);
  margin-right: 12px;
  font-weight: 500;
}

.toc a {
  color: var(--text-body);
  text-decoration: none;
  transition: color 0.12s;
}

.toc a:hover { color: var(--accent); }

/* ─── SUMMARY BOX ───────────────────────────────────────────── */
.summary {
  border: 1px solid var(--border-strong);
  background: var(--bg-elevated);
  border-radius: 4px;
  padding: 28px 32px;
  margin: 32px 0;
}

.summary h4 {
  font-family: 'IBM Plex Serif', serif;
  font-size: 17px;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 12px;
}

.summary ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.summary ul li {
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  color: var(--text-dim);
  font-size: 13px;
  padding-left: 20px;
  position: relative;
}

.summary ul li::before {
  content: "·";
  color: var(--accent);
  position: absolute;
  left: 6px;
}

/* ─── FOOTER ────────────────────────────────────────────────── */
footer {
  margin-top: 120px;
  padding-top: 28px;
  border-top: 1px solid var(--border-strong);
  color: var(--text-faint);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  text-align: center;
  letter-spacing: 0.08em;
}

footer .glyph { color: var(--text-faint); margin: 0 8px; }
footer a { color: var(--text-faint); text-decoration: underline; text-underline-offset: 3px; }
footer a:hover { color: var(--accent); }