:root {
  --navy-950: #0a1128;
  --navy-900: #0f1b3d;
  --navy-800: #16234f;
  --navy-700: #1e2f66;
  --gold: #b08d57;
  --gold-light: #d4b483;
  --gray-100: #f4f5f7;
  --gray-300: #d3d7e0;
  --gray-500: #8890a5;
  --gray-700: #4a5169;
  --white: #ffffff;
  --danger: #b3432b;
  --success: #2f6b4f;
  --radius: 6px;
  --shadow: 0 2px 10px rgba(10, 17, 40, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Georgia", "Times New Roman", serif;
  background: var(--gray-100);
  color: var(--navy-900);
}

.app-shell { display: flex; min-height: 100vh; }

/* --- Sidebar --- */
.sidebar {
  width: 240px;
  background: var(--navy-950);
  color: var(--gray-300);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  flex-shrink: 0;
}

.sidebar .brand {
  font-family: "Georgia", serif;
  font-size: 20px;
  font-weight: bold;
  color: var(--white);
  padding: 0 24px 24px;
  border-bottom: 1px solid var(--navy-700);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.sidebar .brand .accent { color: var(--gold-light); }

.sidebar nav { display: flex; flex-direction: column; gap: 2px; }

.sidebar nav button {
  all: unset;
  cursor: pointer;
  padding: 12px 24px;
  font-family: inherit;
  font-size: 14px;
  color: var(--gray-300);
  border-left: 3px solid transparent;
}

.sidebar nav button:hover { background: var(--navy-900); color: var(--white); }

.sidebar nav button.active {
  background: var(--navy-800);
  color: var(--white);
  border-left-color: var(--gold);
}

.sidebar .footer-note {
  margin-top: auto;
  padding: 16px 24px 0;
  font-size: 11px;
  color: var(--gray-500);
  border-top: 1px solid var(--navy-700);
}

/* --- Main content --- */
.main { flex: 1; padding: 32px 40px; max-width: 980px; }

.page-title {
  font-size: 24px;
  color: var(--navy-900);
  margin: 0 0 6px;
}

.page-subtitle { color: var(--gray-700); font-size: 14px; margin: 0 0 28px; }

.card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

.card h3 { margin-top: 0; color: var(--navy-900); font-size: 16px; }

table { width: 100%; border-collapse: collapse; }

th {
  text-align: left;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-700);
  border-bottom: 2px solid var(--navy-900);
  padding: 10px 12px;
}

td {
  padding: 12px;
  border-bottom: 1px solid var(--gray-300);
  font-size: 14px;
}

tr:hover td { background: var(--gray-100); }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: bold;
  background: var(--navy-800);
  color: var(--gold-light);
}

button.btn {
  all: unset;
  cursor: pointer;
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 14px;
  font-weight: bold;
  background: var(--navy-900);
  color: var(--white);
  text-align: center;
}

button.btn:hover { background: var(--navy-700); }
button.btn:disabled { background: var(--gray-500); cursor: default; }

button.btn.secondary {
  background: transparent;
  color: var(--navy-900);
  border: 1px solid var(--navy-900);
}

button.btn.secondary:hover { background: var(--gray-100); }

input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  color: var(--navy-900);
  background: var(--white);
}

textarea { resize: vertical; min-height: 100px; }

label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--gray-700);
  margin-bottom: 6px;
  margin-top: 16px;
}

label:first-child { margin-top: 0; }

.disclaimer {
  background: #fbf3e7;
  border-left: 3px solid var(--gold);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--navy-900);
  margin-top: 16px;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
  background: linear-gradient(160deg, var(--navy-950), var(--navy-800));
}

.login-box {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  width: 360px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  text-align: center;
}

.login-box .brand {
  font-size: 24px;
  color: var(--navy-900);
  margin-bottom: 4px;
}

.login-box .brand .accent { color: var(--gold); }

.login-box p.tagline {
  color: var(--gray-700);
  font-size: 13px;
  margin-bottom: 28px;
}

.hidden { display: none !important; }

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--gray-300);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.markdown-output {
  white-space: pre-wrap;
  font-family: "Georgia", serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--navy-900);
  background: var(--gray-100);
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-300);
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--gray-500);
  font-size: 14px;
}

/* --- Kütüphane: müvekkil/dava ağacı + belge görünümü --- */

.library {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  height: calc(100vh - 64px);
}

.library-tree {
  width: 280px;
  flex-shrink: 0;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow-y: auto;
  height: 100%;
}

.tree-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--gray-300);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-700);
  position: sticky;
  top: 0;
  background: var(--white);
}

.icon-btn {
  all: unset;
  cursor: pointer;
  width: 22px;
  height: 22px;
  line-height: 22px;
  text-align: center;
  border-radius: 4px;
  background: var(--navy-900);
  color: var(--white);
  font-size: 14px;
}
.icon-btn:hover { background: var(--navy-700); }

.muvekkil-node { border-bottom: 1px solid var(--gray-100); }

.muvekkil-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  cursor: pointer;
  font-size: 14px;
  color: var(--navy-900);
  font-weight: bold;
}
.muvekkil-row:hover { background: var(--gray-100); }
.muvekkil-row .kisaltma {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--navy-800); color: var(--gold-light);
  font-size: 11px; font-weight: bold;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.dava-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px 9px 42px;
  cursor: pointer;
  font-size: 13px;
  color: var(--gray-700);
  border-left: 3px solid transparent;
}
.dava-row:hover { background: var(--gray-100); color: var(--navy-900); }
.dava-row.active {
  background: var(--gray-100);
  color: var(--navy-900);
  border-left-color: var(--gold);
  font-weight: bold;
}

.library-main {
  flex: 1;
  min-width: 0;
  height: 100%;
  overflow-y: auto;
  padding-right: 4px;
}

.dava-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 16px;
}
.dava-header h2 { margin: 0; font-size: 20px; color: var(--navy-900); }
.dava-header .meta { font-size: 12px; color: var(--gray-500); margin-top: 4px; }

.evrak-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-100);
  cursor: pointer;
  font-size: 14px;
}
.evrak-row:last-child { border-bottom: none; }
.evrak-row:hover { background: var(--gray-100); }
.evrak-row .dosya-ikon { font-size: 18px; }
.evrak-row .dosya-adi { flex: 1; color: var(--navy-900); }
.evrak-row .dosya-tarih { font-size: 12px; color: var(--gray-500); }

/* --- Split view: solda belge, sağda sohbet --- */

.split-view {
  display: flex;
  gap: 20px;
  height: 100%;
}

.doc-panel, .chat-panel {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}

.doc-panel { flex: 1.1; }
.chat-panel { flex: 0.9; }

.doc-panel-header, .chat-panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--gray-300);
  flex-shrink: 0;
}

.doc-panel-header h3, .chat-panel-header h3 {
  margin: 0;
  font-size: 14px;
  color: var(--navy-900);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.geri-btn {
  all: unset;
  cursor: pointer;
  color: var(--navy-900);
  font-size: 13px;
  padding: 4px 8px;
  border-radius: 4px;
}
.geri-btn:hover { background: var(--gray-100); }

.doc-preview {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  white-space: pre-wrap;
  font-family: "Georgia", serif;
  font-size: 13px;
  line-height: 1.7;
  color: var(--navy-900);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-bubble {
  max-width: 90%;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
}
.chat-bubble.kullanici {
  align-self: flex-end;
  background: var(--navy-900);
  color: var(--white);
}
.chat-bubble.asistan {
  align-self: flex-start;
  background: var(--gray-100);
  color: var(--navy-900);
  border: 1px solid var(--gray-300);
}

.chat-input-row {
  display: flex;
  gap: 8px;
  padding: 14px;
  border-top: 1px solid var(--gray-300);
  flex-shrink: 0;
}
.chat-input-row input { flex: 1; margin: 0; }
.chat-input-row button { flex-shrink: 0; padding: 10px 18px; }