/* =========================================================
   Otel Yönetimi Rehberi — Design System
   Taste: Bespoke — "SOP klasörü × ön büro ekranı" (lüks-ayarlı)
   Mode: Read (referans) + Operate (gezinme/filtre/arama)
   Color strategy: Committed — derin zemin + tek bronz vurgu
   ========================================================= */

:root {
  /* Palette */
  --canvas: #12181c;
  --canvas-raised: #182027;
  --canvas-alt: #f7f5f0;
  --canvas-alt-raised: #ffffff;
  --ink: #eae6da;
  --ink-dim: #b9c0c2;
  --ink-dark: #1a1f23;
  --ink-dark-dim: #4d565c;
  --accent: #b8925a;
  --accent-strong: #d2a869;
  --accent-dim: #8a6c40;
  --muted: #7d8790;
  --rule-dark: rgba(234, 230, 218, 0.14);
  --rule-light: rgba(26, 31, 35, 0.12);

  /* Type */
  --font-serif: "Source Serif 4", "Iowan Old Style", "Georgia", serif;
  --font-sans: "Public Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Rhythm */
  --measure: 68ch;
  --radius: 3px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 600; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
a { color: inherit; }

::selection { background: var(--accent); color: #12181c; }

/* Focus rings — themed, never left at browser default */
:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Scrollbar theming */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--canvas); }
::-webkit-scrollbar-thumb { background: #2b3339; border: 2px solid var(--canvas); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: #14181a; padding: 10px 16px; z-index: 999;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- Layout helpers ---------- */
.header-inner, .hero-inner, .category-bar-inner, .article-section-inner, .footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding-left: 28px;
  padding-right: 28px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(18, 24, 28, 0.86);
  backdrop-filter: blur(10px) saturate(1.1);
  border-bottom: 1px solid var(--rule-dark);
}
.header-inner {
  display: flex; align-items: center; gap: 32px;
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); flex-shrink: 0; }
.brand-mark { color: var(--accent-strong); display: inline-flex; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-family: var(--font-serif); font-weight: 600; font-size: 16.5px; letter-spacing: 0.01em; }
.brand-text em { font-style: normal; font-size: 11px; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; }

.main-nav { display: flex; gap: 4px; margin-left: 8px; }
.nav-link {
  background: none; border: none; color: var(--ink-dim);
  font-size: 14.5px; padding: 9px 14px; border-radius: var(--radius);
  transition: color 0.18s var(--ease-out), background 0.18s var(--ease-out);
}
.nav-link:hover { color: var(--ink); background: rgba(234,230,218,0.05); }

.header-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.search-trigger {
  display: flex; align-items: center; gap: 8px;
  background: rgba(234,230,218,0.05); border: 1px solid var(--rule-dark);
  color: var(--ink-dim); padding: 8px 12px; border-radius: var(--radius);
  font-size: 13.5px; transition: border-color 0.18s var(--ease-out), color 0.18s var(--ease-out);
}
.search-trigger:hover { border-color: var(--accent-dim); color: var(--ink); }
.search-trigger kbd {
  border: 1px solid var(--rule-dark); border-radius: 3px; padding: 1px 6px;
  font-family: var(--font-mono); font-size: 11px; color: var(--muted);
}

.menu-toggle { display: none; flex-direction: column; gap: 4px; background: none; border: none; padding: 8px; }
.menu-toggle span { width: 20px; height: 1.5px; background: var(--ink); display: block; }
.main-nav-mobile { display: none; flex-direction: column; padding: 8px 28px 16px; border-top: 1px solid var(--rule-dark); }
.main-nav-mobile .nav-link { text-align: left; font-size: 16px; padding: 12px 4px; }

@media (max-width: 880px) {
  .main-nav { display: none; }
  .menu-toggle { display: flex; }
  .site-header.is-open .main-nav-mobile { display: flex; }
  .search-trigger span { display: none; }
  .search-trigger kbd { display: none; }
}

/* ---------- Search panel ---------- */
.search-panel {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(10, 13, 15, 0.72);
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 12vh;
}
.search-panel[hidden] { display: none; }
.search-panel-inner {
  width: min(640px, 90vw);
  background: var(--canvas-raised);
  border: 1px solid var(--rule-dark);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px -20px rgba(0,0,0,0.6);
}
.search-field { display: flex; align-items: center; gap: 12px; padding: 18px 20px; border-bottom: 1px solid var(--rule-dark); color: var(--muted); }
.search-field input {
  flex: 1; background: none; border: none; color: var(--ink); font-size: 16.5px; font-family: var(--font-sans);
}
.search-field input:focus { outline: none; }
.search-field input::placeholder { color: var(--muted); }
#search-close { background: none; border: 1px solid var(--rule-dark); color: var(--muted); font-size: 11px; padding: 4px 8px; border-radius: 3px; }
.search-results { max-height: 52vh; overflow-y: auto; padding: 8px; }
.search-result-item {
  display: block; width: 100%; text-align: left; background: none; border: none;
  padding: 12px 12px; border-radius: var(--radius); color: var(--ink);
}
.search-result-item:hover, .search-result-item.is-active { background: rgba(184,146,90,0.1); }
.search-result-cat { color: var(--accent-strong); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; }
.search-result-title { font-family: var(--font-serif); font-size: 16px; margin-top: 2px; }
.search-result-summary { color: var(--ink-dim); font-size: 13.5px; margin-top: 4px; line-height: 1.4; }
.search-empty { color: var(--muted); padding: 24px 12px; text-align: center; font-size: 14px; }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 64px;
  position: relative;
  border-bottom: 1px solid var(--rule-dark);
  background:
    linear-gradient(180deg, rgba(184,146,90,0.05), transparent 40%),
    var(--canvas);
}
.hero-inner { max-width: 880px; }
.hero-kicker {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent-strong); margin-bottom: 22px;
}
.hero-title {
  font-size: clamp(34px, 5.4vw, 56px);
  line-height: 1.12;
  color: var(--ink);
  max-width: 14ch;
}
.hero-title-accent { color: var(--accent-strong); }
.hero-lede {
  margin-top: 26px; font-size: 18px; line-height: 1.6; color: var(--ink-dim); max-width: 52ch;
}
.hero-actions { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }
.btn {
  font-family: var(--font-sans); font-size: 14.5px; font-weight: 600; letter-spacing: 0.01em;
  padding: 13px 22px; border-radius: var(--radius); border: 1px solid transparent;
  transition: transform 0.18s var(--ease-out), background 0.18s var(--ease-out), border-color 0.18s var(--ease-out);
}
.btn-primary { background: var(--accent); color: #171310; }
.btn-primary:hover { background: var(--accent-strong); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule-dark); }
.btn-ghost:hover { border-color: var(--accent-dim); transform: translateY(-1px); }

.hero-stats {
  display: flex; gap: 40px; margin: 56px 0 0; padding-top: 28px; border-top: 1px solid var(--rule-dark);
}
.hero-stats > div { display: flex; flex-direction: column; gap: 4px; }
.hero-stats dt { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
.hero-stats dd { margin: 0; font-family: var(--font-serif); font-size: 28px; color: var(--ink); }

/* ---------- Category / filter bar ---------- */
.category-bar {
  background: var(--canvas-raised);
  border-bottom: 1px solid var(--rule-dark);
  position: sticky; top: 72px; z-index: 40;
}
.category-bar-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding-top: 16px; padding-bottom: 16px; flex-wrap: wrap;
}
.filter-group { display: flex; align-items: center; gap: 12px; }
.filter-label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; white-space: nowrap; }
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  background: transparent; border: 1px solid var(--rule-dark); color: var(--ink-dim);
  font-size: 13.5px; padding: 7px 14px; border-radius: 999px;
  transition: border-color 0.18s var(--ease-out), color 0.18s var(--ease-out), background 0.18s var(--ease-out);
}
.chip:hover { border-color: var(--accent-dim); color: var(--ink); }
.chip.is-active { background: var(--accent); border-color: var(--accent); color: #171310; }

#level-select {
  background: var(--canvas); color: var(--ink); border: 1px solid var(--rule-dark);
  border-radius: var(--radius); padding: 8px 12px; font-size: 13.5px; font-family: var(--font-sans);
}

/* ---------- Article grid ---------- */
.article-section { background: var(--canvas-alt); color: var(--ink-dark); padding: 56px 0 96px; }
.results-meta { color: var(--ink-dark-dim); font-size: 13.5px; margin-bottom: 24px; }
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1px;
  background: var(--rule-light);
  border: 1px solid var(--rule-light);
}
.article-card {
  background: var(--canvas-alt-raised);
  padding: 28px 26px;
  display: flex; flex-direction: column; gap: 12px;
  text-align: left; border: none;
  opacity: 0; transform: translateY(14px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}
.article-card.is-visible { opacity: 1; transform: translateY(0); }
.article-card:hover .card-title { color: var(--accent-dim); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.card-cat {
  font-family: var(--font-mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--accent-dim);
}
.card-level {
  font-size: 10.5px; color: var(--ink-dark-dim); border: 1px solid var(--rule-light);
  padding: 2px 8px; border-radius: 999px; white-space: nowrap;
}
.card-title {
  font-size: 19px; line-height: 1.3; color: var(--ink-dark);
  transition: color 0.18s var(--ease-out);
}
.card-summary { font-size: 14.5px; line-height: 1.55; color: var(--ink-dark-dim); flex: 1; }
.card-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }
.card-tag { font-size: 11px; color: var(--ink-dark-dim); background: #f0eee7; padding: 3px 9px; border-radius: 999px; }

.empty-state { text-align: center; color: var(--ink-dark-dim); padding: 60px 0; font-size: 15px; }

/* ---------- Article detail overlay ---------- */
.article-overlay {
  position: fixed; inset: 0; z-index: 90;
  background: rgba(10, 13, 15, 0.6);
  display: flex; justify-content: flex-end;
}
.article-overlay[hidden] { display: none; }
.article-panel {
  width: min(760px, 100vw);
  height: 100%;
  background: var(--canvas-alt);
  color: var(--ink-dark);
  box-shadow: -30px 0 60px -30px rgba(0,0,0,0.5);
  transform: translateX(24px); opacity: 0;
  transition: transform 0.32s var(--ease-out), opacity 0.32s var(--ease-out);
}
.article-overlay.is-open .article-panel { transform: translateX(0); opacity: 1; }
.article-panel-scroll { height: 100%; overflow-y: auto; padding: 64px 56px 80px; position: relative; }
.panel-close {
  position: absolute; top: 24px; right: 24px;
  background: none; border: 1px solid var(--rule-light); color: var(--ink-dark);
  width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
}
.panel-close:hover { border-color: var(--accent-dim); }
.article-panel-cat {
  font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--accent-dim); margin-bottom: 14px;
}
.article-panel-head h2 { font-size: clamp(24px, 3vw, 32px); line-height: 1.24; }
.article-panel-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
.article-panel-tags .card-tag { background: #f0eee7; }

.article-panel-body { margin-top: 34px; max-width: var(--measure); font-size: 17px; line-height: 1.6; }
.article-panel-body p { margin-bottom: 20px; }
.article-panel-body h3 { font-size: 19px; margin: 32px 0 12px; color: var(--ink-dark); }
.article-panel-body ul, .article-panel-body ol { margin: 0 0 20px; padding-left: 22px; }
.article-panel-body li { margin-bottom: 8px; }
.article-panel-body strong { font-weight: 600; }

.article-panel-sources {
  margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--rule-light); max-width: var(--measure);
}
.article-panel-sources h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-dark-dim); margin-bottom: 14px; }
.article-panel-sources ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.article-panel-sources a {
  font-size: 14px; color: var(--accent-dim); text-decoration: underline; text-underline-offset: 3px;
  word-break: break-word;
}
.article-panel-note {
  margin-top: 36px; padding: 16px 18px; background: #f0eee7; border-radius: var(--radius);
  max-width: var(--measure);
}
.article-panel-note p { font-size: 13px; color: var(--ink-dark-dim); line-height: 1.5; }

@media (max-width: 640px) {
  .article-panel-scroll { padding: 56px 22px 60px; }
}

/* ---------- Assistant widget ---------- */
.assistant-fab {
  position: fixed; bottom: 26px; right: 26px; z-index: 70;
  display: flex; align-items: center; gap: 9px;
  background: var(--accent); color: #171310; border: none;
  padding: 13px 20px; border-radius: 999px; font-size: 14px; font-weight: 600;
  box-shadow: 0 12px 30px -8px rgba(0,0,0,0.45);
  transition: transform 0.2s var(--ease-out), background 0.2s var(--ease-out);
}
.assistant-fab:hover { background: var(--accent-strong); transform: translateY(-2px); }

.assistant-panel {
  position: fixed; bottom: 26px; right: 26px; z-index: 80;
  width: min(400px, calc(100vw - 32px));
  height: min(560px, calc(100vh - 100px));
  background: var(--canvas-raised);
  border: 1px solid var(--rule-dark);
  border-radius: 8px;
  box-shadow: 0 30px 70px -20px rgba(0,0,0,0.6);
  display: flex; flex-direction: column;
  transform: translateY(16px) scale(0.98); opacity: 0;
  transition: transform 0.22s var(--ease-out), opacity 0.22s var(--ease-out);
}
.assistant-panel[hidden] { display: none; }
.assistant-panel.is-open { transform: translateY(0) scale(1); opacity: 1; }
.assistant-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  padding: 20px 20px 16px; border-bottom: 1px solid var(--rule-dark);
}
.assistant-head h2 { font-size: 16.5px; color: var(--ink); }
.assistant-head p { font-size: 12.5px; color: var(--muted); margin-top: 5px; line-height: 1.4; }
.assistant-close { background: none; border: none; color: var(--muted); padding: 4px; }
.assistant-close:hover { color: var(--ink); }

.assistant-log { flex: 1; overflow-y: auto; padding: 18px 20px; display: flex; flex-direction: column; gap: 14px; }
.assistant-msg p { font-size: 14px; line-height: 1.55; padding: 10px 14px; border-radius: 10px; max-width: 88%; }
.assistant-msg-bot p { background: rgba(234,230,218,0.06); color: var(--ink); border: 1px solid var(--rule-dark); }
.assistant-msg-user { display: flex; justify-content: flex-end; }
.assistant-msg-user p { background: var(--accent); color: #171310; }
.assistant-msg-error p { background: rgba(200, 90, 70, 0.12); color: #e3a08d; border: 1px solid rgba(200,90,70,0.3); }
.assistant-typing { display: flex; gap: 4px; padding: 10px 14px; }
.assistant-typing span { width: 5px; height: 5px; border-radius: 50%; background: var(--muted); animation: dot 1.2s infinite ease-in-out; }
.assistant-typing span:nth-child(2) { animation-delay: 0.15s; }
.assistant-typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes dot { 0%, 80%, 100% { opacity: 0.25; } 40% { opacity: 1; } }

.assistant-form { display: flex; gap: 10px; padding: 14px 16px; border-top: 1px solid var(--rule-dark); }
.assistant-form textarea {
  flex: 1; resize: none; background: rgba(234,230,218,0.05); border: 1px solid var(--rule-dark);
  color: var(--ink); border-radius: 8px; padding: 10px 12px; font-family: var(--font-sans); font-size: 14px;
  max-height: 100px;
}
.assistant-form textarea:focus { outline: none; border-color: var(--accent-dim); }
.assistant-form button {
  background: var(--accent); border: none; color: #171310; border-radius: 8px; width: 40px; flex-shrink: 0;
}
.assistant-form button:hover { background: var(--accent-strong); }
.assistant-form button:disabled { opacity: 0.5; cursor: not-allowed; }
.assistant-disclaimer { font-size: 11px; color: var(--muted); padding: 0 16px 14px; line-height: 1.4; }

@media (max-width: 480px) {
  .assistant-fab span { display: none; }
  .assistant-fab { padding: 14px; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--canvas-raised); border-top: 1px solid var(--rule-dark); padding-top: 56px; }
.footer-inner { display: flex; justify-content: space-between; gap: 48px; flex-wrap: wrap; padding-bottom: 40px; }
.footer-brand { display: flex; gap: 12px; max-width: 320px; }
.footer-brand .brand-mark { color: var(--accent-strong); flex-shrink: 0; }
.footer-brand p { font-family: var(--font-serif); font-size: 15px; color: var(--ink); line-height: 1.4; }
.footer-brand span { font-family: var(--font-sans); font-size: 12.5px; color: var(--muted); }
.footer-cols { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-cols h3 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 14px; }
.footer-cols ul { display: flex; flex-direction: column; gap: 9px; list-style: none; }
.footer-cols button { background: none; border: none; color: var(--ink-dim); font-size: 14px; padding: 0; }
.footer-cols button:hover { color: var(--accent-strong); }
.footer-note { max-width: 280px; font-size: 13px; color: var(--ink-dim); line-height: 1.55; }
.footer-bottom {
  border-top: 1px solid var(--rule-dark); padding: 18px 28px; text-align: center;
}
.footer-bottom p { font-size: 12.5px; color: var(--muted); }

@media (max-width: 640px) {
  .hero { padding: 72px 0 48px; }
  .header-inner { height: 64px; }
  .category-bar { top: 64px; }
  .hero-stats { gap: 28px; flex-wrap: wrap; }
}