/* ============================================================================
 * Design system — Ders Programı
 * "Akademik Almanak" — parşömen + mürekkep, çam yeşili & pirinç, editöryel serif.
 * Tokens + Bootstrap 5.3 variable overrides + refined component defaults.
 * Loaded after Bootstrap so these win. Selector/class contracts unchanged.
 * ========================================================================== */

:root {
  /* Fonts */
  --ds-font-display: "Fraunces", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --ds-font-body:    "Hanken Grotesk", "Segoe UI", system-ui, -apple-system, sans-serif;

  /* Color tokens — warm parchment + ink */
  --ds-bg:          #f4efe3;
  --ds-bg-tinted:   #ece4d3;
  --ds-surface:     #fffdf7;
  --ds-surface-2:   #f5efe2;
  --ds-surface-3:   #ebe3d1;
  --ds-border:      #e2d8c2;
  --ds-border-soft: #ece4d3;
  --ds-text:        #1e241f;
  --ds-text-soft:   #424a40;
  --ds-muted:       #6e7263;
  --ds-muted-2:     #9b9a86;

  --ds-primary:        #0f6e5c;   /* çam / orman yeşili */
  --ds-primary-hover:  #0a5446;
  --ds-primary-soft:   #e1eee8;
  --ds-primary-ring:   rgba(15, 110, 92, .20);

  --ds-accent:         #b07d2b;   /* pirinç / amber ikincil vurgu */
  --ds-accent-soft:    #f3e7cd;

  --ds-success:        #2f7d4f;
  --ds-success-soft:   #dfeede;
  --ds-warning:        #b07d2b;
  --ds-warning-soft:   #f3e7cd;
  --ds-danger:         #b3261e;   /* oxblood */
  --ds-danger-soft:    #f5dcd5;
  --ds-info:           #2c6e75;   /* derin teal */
  --ds-info-soft:      #d9ebea;

  /* Layout — editöryel: biraz daha az yuvarlak */
  --ds-radius-sm: 6px;
  --ds-radius:    10px;
  --ds-radius-lg: 14px;
  --ds-radius-xl: 18px;

  --ds-shadow-xs: 0 1px 2px rgba(30, 36, 31, .06);
  --ds-shadow-sm: 0 1px 3px rgba(30, 36, 31, .08), 0 6px 14px rgba(30, 36, 31, .04);
  --ds-shadow-md: 0 2px 6px rgba(30, 36, 31, .09), 0 16px 30px rgba(30, 36, 31, .06);
  --ds-shadow-lg: 0 12px 44px rgba(30, 36, 31, .14);

  --ds-sidebar-w: 224px;
  --ds-sidebar-w-collapsed: 64px;
  --ds-navbar-h: 60px;

  /* Bootstrap 5.3 overrides */
  --bs-body-bg: var(--ds-bg);
  --bs-body-color: var(--ds-text);
  --bs-body-font-family: var(--ds-font-body);
  --bs-border-color: var(--ds-border);
  --bs-secondary-color: var(--ds-muted);
  --bs-tertiary-bg: var(--ds-surface-2);
  --bs-link-color: var(--ds-primary);
  --bs-link-hover-color: var(--ds-primary-hover);

  --bs-primary: var(--ds-primary);
  --bs-primary-rgb: 15, 110, 92;
  --bs-success: var(--ds-success);
  --bs-success-rgb: 47, 125, 79;
  --bs-warning: var(--ds-warning);
  --bs-warning-rgb: 176, 125, 43;
  --bs-danger:  var(--ds-danger);
  --bs-danger-rgb: 179, 38, 30;
  --bs-info: var(--ds-info);
  --bs-info-rgb: 44, 110, 117;
}

/* ----- Base body / typography -------------------------------------------- */
html, body {
  font-family: var(--bs-body-font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  background:
    radial-gradient(1100px 600px at -8% -20%, rgba(15,110,92,.06), transparent 60%),
    radial-gradient(900px 520px at 112% -8%, rgba(176,125,43,.07), transparent 58%),
    /* ince ledger dokusu */
    repeating-linear-gradient(0deg, rgba(30,36,31,.018) 0 1px, transparent 1px 28px),
    var(--ds-bg);
  color: var(--ds-text);
  letter-spacing: -.003em;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--ds-font-display);
  color: var(--ds-text);
  letter-spacing: -.01em;
  font-weight: 600;
  font-optical-sizing: auto;
}
.text-muted { color: var(--ds-muted) !important; }
small, .small { color: var(--ds-muted); }

a { text-decoration: none; }
a:hover { text-decoration: underline; }

/* Sayısal alanlarda hizalı (tabular) rakamlar */
.table, .ds-stat-value, .ds-stat, .badge, .ds-pill, code, .font-tnum {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

/* ----- Buttons ------------------------------------------------------------ */
.btn {
  --bs-btn-padding-y: .5rem;
  --bs-btn-padding-x: 1rem;
  --bs-btn-font-weight: 600;
  --bs-btn-border-radius: 9px;
  font-family: var(--ds-font-body);
  letter-spacing: -.005em;
  transition: transform .08s ease, box-shadow .15s ease, background-color .15s ease, border-color .15s ease, color .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-sm { --bs-btn-border-radius: 7px; --bs-btn-padding-y: .35rem; --bs-btn-padding-x: .75rem; }
.btn-lg { --bs-btn-border-radius: 11px; }

.btn-primary {
  --bs-btn-bg: var(--ds-primary);
  --bs-btn-border-color: var(--ds-primary);
  --bs-btn-hover-bg: var(--ds-primary-hover);
  --bs-btn-hover-border-color: var(--ds-primary-hover);
  --bs-btn-active-bg: var(--ds-primary-hover);
  --bs-btn-active-border-color: var(--ds-primary-hover);
  box-shadow: 0 2px 8px rgba(15,110,92,.22);
}
.btn-primary:hover { box-shadow: 0 4px 14px rgba(15,110,92,.30); }

.btn-outline-primary { --bs-btn-color: var(--ds-primary); --bs-btn-border-color: var(--ds-primary); --bs-btn-hover-bg: var(--ds-primary); --bs-btn-hover-border-color: var(--ds-primary); }
.btn-outline-secondary { --bs-btn-color: var(--ds-text-soft); --bs-btn-border-color: var(--ds-border); --bs-btn-hover-bg: var(--ds-surface-2); --bs-btn-hover-border-color: var(--ds-border); --bs-btn-hover-color: var(--ds-text); }
.btn-outline-success { --bs-btn-color: var(--ds-success); --bs-btn-border-color: var(--ds-success); --bs-btn-hover-bg: var(--ds-success); --bs-btn-hover-border-color: var(--ds-success); }
.btn-secondary { --bs-btn-bg: #555b4c; --bs-btn-border-color: #555b4c; --bs-btn-hover-bg: #41463a; --bs-btn-hover-border-color: #41463a; }
.btn-success { box-shadow: 0 2px 8px rgba(47,125,79,.22); }
.btn-danger  { box-shadow: 0 2px 8px rgba(179,38,30,.20); }
.btn-warning { color: #fff !important; --bs-btn-color: #fff; --bs-btn-hover-color: #fff; box-shadow: 0 2px 8px rgba(176,125,43,.22); }

.btn-light { --bs-btn-bg: var(--ds-surface); --bs-btn-border-color: var(--ds-border); --bs-btn-hover-bg: var(--ds-surface-2); }

.btn-link { color: var(--ds-primary); }
.btn-link:hover { color: var(--ds-primary-hover); }

/* ----- Cards / surfaces --------------------------------------------------- */
.card {
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-surface);
  box-shadow: var(--ds-shadow-xs);
}
.card.shadow-sm  { box-shadow: var(--ds-shadow-sm) !important; }
.card.shadow     { box-shadow: var(--ds-shadow-md) !important; }
.card.shadow-lg  { box-shadow: var(--ds-shadow-lg) !important; }
.card.border-0   { border-color: transparent !important; }
.card-body { padding: 1.25rem 1.5rem; }
.card-header {
  background: transparent;
  border-bottom: 1px solid var(--ds-border-soft);
  padding: 1rem 1.5rem;
  font-weight: 600;
}

.ds-card {
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--ds-shadow-sm);
}
.ds-card-glass {
  background: rgba(255,253,247,.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(226,216,194,.6);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-md);
}

.ds-page-header {
  display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between;
  gap: 1rem; margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--ds-border);
  position: relative;
}
/* editöryel: başlık altında kısa pirinç vurgu çizgisi */
.ds-page-header::after {
  content: ""; position: absolute; left: 0; bottom: -1px;
  width: 56px; height: 2px; background: var(--ds-accent); border-radius: 2px;
}
.ds-page-header .ds-title {
  font-family: var(--ds-font-display);
  display: flex; align-items: center; gap: .6rem;
  font-size: 1.65rem; font-weight: 600; color: var(--ds-text); margin: 0;
  letter-spacing: -.015em;
}
.ds-page-header .ds-title i { color: var(--ds-primary); font-size: .95em; }
.ds-page-header .ds-subtitle { color: var(--ds-muted); font-size: .9rem; margin-top: .2rem; }
.ds-page-header .ds-actions { display: flex; flex-wrap: wrap; gap: .5rem; }

/* Stat card */
.ds-stat {
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius);
  padding: 1rem 1.1rem;
  display: flex; gap: .85rem; align-items: center;
  box-shadow: var(--ds-shadow-xs);
  transition: transform .12s ease, box-shadow .15s ease;
}
.ds-stat:hover { transform: translateY(-2px); box-shadow: var(--ds-shadow-sm); }
.ds-stat .ds-stat-icon {
  width: 44px; height: 44px; border-radius: 11px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--ds-primary-soft); color: var(--ds-primary);
  font-size: 1.2rem; flex-shrink: 0;
}
.ds-stat .ds-stat-icon.success { background: var(--ds-success-soft); color: var(--ds-success); }
.ds-stat .ds-stat-icon.warning { background: var(--ds-warning-soft); color: var(--ds-warning); }
.ds-stat .ds-stat-icon.danger  { background: var(--ds-danger-soft);  color: var(--ds-danger); }
.ds-stat .ds-stat-icon.info    { background: var(--ds-info-soft);    color: var(--ds-info); }
.ds-stat .ds-stat-label { color: var(--ds-muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .07em; font-weight: 700; }
.ds-stat .ds-stat-value { font-family: var(--ds-font-display); font-size: 1.5rem; font-weight: 600; color: var(--ds-text); line-height: 1.05; }

/* Empty state */
.ds-empty {
  text-align: center; padding: 2.5rem 1.5rem; color: var(--ds-muted);
  background: var(--ds-surface-2); border: 1px dashed var(--ds-border); border-radius: var(--ds-radius);
}
.ds-empty .ds-empty-icon { font-size: 2rem; opacity: .5; display: block; margin-bottom: .25rem; }

/* Pills */
.ds-pill {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 10px; border-radius: 999px;
  background: var(--ds-primary-soft); color: var(--ds-primary);
  font-size: 11.5px; font-weight: 600; letter-spacing: .01em;
}
.ds-pill.success { background: var(--ds-success-soft); color: var(--ds-success); }
.ds-pill.warning { background: var(--ds-warning-soft); color: var(--ds-warning); }
.ds-pill.danger  { background: var(--ds-danger-soft);  color: var(--ds-danger); }
.ds-pill.info    { background: var(--ds-info-soft);    color: var(--ds-info); }
.ds-pill.muted   { background: var(--ds-surface-3);    color: var(--ds-muted); }

/* ----- Forms ------------------------------------------------------------- */
.form-control, .form-select {
  border-radius: 9px;
  border-color: var(--ds-border);
  background-color: var(--ds-surface);
  color: var(--ds-text);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.form-control:focus, .form-select:focus {
  border-color: var(--ds-primary);
  box-shadow: 0 0 0 4px var(--ds-primary-ring);
}
.form-control::placeholder { color: var(--ds-muted-2); }
.form-control[disabled], .form-select[disabled] { background-color: var(--ds-surface-2); color: var(--ds-muted); }

.form-label { font-weight: 600; color: var(--ds-text-soft); margin-bottom: .35rem; }
.form-text { color: var(--ds-muted); }

.input-group-text { background: var(--ds-surface-2); border-color: var(--ds-border); color: var(--ds-muted); }

.form-check-input:checked { background-color: var(--ds-primary); border-color: var(--ds-primary); }
.form-check-input:focus { border-color: var(--ds-primary); box-shadow: 0 0 0 4px var(--ds-primary-ring); }

/* ----- Tables ------------------------------------------------------------ */
.table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--ds-text);
  --bs-table-border-color: var(--ds-border-soft);
  --bs-table-hover-bg: var(--ds-surface-2);
  --bs-table-striped-bg: var(--ds-surface-2);
  margin-bottom: 0;
}
.table thead th {
  font-family: var(--ds-font-body);
  font-size: 11px; text-transform: uppercase; letter-spacing: .07em;
  font-weight: 700; color: var(--ds-muted);
  border-bottom: 1px solid var(--ds-border) !important;
  background: var(--ds-surface-2);
  padding: .7rem .85rem;
}
.table tbody td { padding: .72rem .85rem; border-bottom: 1px solid var(--ds-border-soft); vertical-align: middle; }
.table tbody tr:last-child td { border-bottom: none; }
.table-hover tbody tr:hover td { background-color: var(--ds-surface-2); }

/* Wrap a table in .ds-table-card to get rounded corners + soft shadow */
.ds-table-card {
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius);
  overflow: hidden;
  box-shadow: var(--ds-shadow-xs);
}
.ds-table-card .table { margin: 0; }

/* ----- Alerts ------------------------------------------------------------ */
.alert { border: none; border-radius: var(--ds-radius); padding: .85rem 1.1rem; box-shadow: var(--ds-shadow-xs); border-left: 3px solid transparent; }
.alert-success { background: var(--ds-success-soft); color: #1c4f31; border-left-color: var(--ds-success); }
.alert-danger,
.alert-error   { background: var(--ds-danger-soft);  color: #7a1c16; border-left-color: var(--ds-danger); }
.alert-warning { background: var(--ds-warning-soft); color: #6e4d16; border-left-color: var(--ds-warning); }
.alert-info    { background: var(--ds-info-soft);    color: #1c4a4f; border-left-color: var(--ds-info); }

/* ----- Modals ------------------------------------------------------------ */
.modal-content {
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-lg);
  overflow: hidden;
  background: var(--ds-surface);
}
.modal-header { border-bottom-color: var(--ds-border-soft); padding: 1rem 1.25rem; }
.modal-footer { border-top-color: var(--ds-border-soft); padding: 1rem 1.25rem; }
.modal-title  { font-family: var(--ds-font-display); font-weight: 600; }

.modal-backdrop.show { opacity: .4; }

/* ----- Dropdowns / popovers --------------------------------------------- */
.dropdown-menu {
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius);
  box-shadow: var(--ds-shadow-md);
  padding: .35rem;
  background: var(--ds-surface);
}
.dropdown-item { border-radius: 7px; padding: .45rem .65rem; font-weight: 500; }
.dropdown-item:hover, .dropdown-item:focus { background: var(--ds-surface-2); }

/* ----- Accordion -------------------------------------------------------- */
.accordion {
  --bs-accordion-bg: var(--ds-surface);
  --bs-accordion-border-color: var(--ds-border);
  --bs-accordion-border-radius: var(--ds-radius);
  --bs-accordion-active-color: var(--ds-text);
  --bs-accordion-active-bg: var(--ds-surface-2);
  --bs-accordion-btn-focus-box-shadow: 0 0 0 3px var(--ds-primary-ring);
}
.accordion-button { font-weight: 600; }
.accordion-button:not(.collapsed) { box-shadow: none; }

/* ----- Badges ----------------------------------------------------------- */
.badge {
  font-weight: 600;
  padding: .35em .6em;
  border-radius: 999px;
  letter-spacing: .01em;
}
.badge.bg-light { background: var(--ds-surface-2) !important; color: var(--ds-text-soft); border: 1px solid var(--ds-border); }

/* ----- Sticky page header (simple_form etc.) --------------------------- */
.ds-section-title {
  font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
  color: var(--ds-muted); margin: 1.5rem 0 .5rem;
}

/* ----- Scrollbar (subtle) ---------------------------------------------- */
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: rgba(30,36,31,.18); border-radius: 999px; border: 2px solid transparent; background-clip: padding-box; }
*::-webkit-scrollbar-thumb:hover { background: rgba(30,36,31,.30); border: 2px solid transparent; background-clip: padding-box; }

/* ----- Tabs ----------------------------------------------------------- */
.nav-tabs {
  border-bottom: 1px solid var(--ds-border);
  gap: .25rem;
}
.nav-tabs .nav-link {
  border: 1px solid transparent; border-bottom: none;
  border-radius: 9px 9px 0 0;
  color: var(--ds-muted); font-weight: 600; padding: .55rem 1rem;
}
.nav-tabs .nav-link:hover { color: var(--ds-text); border-color: transparent; background: var(--ds-surface-2); }
.nav-tabs .nav-link.active {
  color: var(--ds-primary); background: var(--ds-surface);
  border-color: var(--ds-border); border-bottom-color: var(--ds-surface);
  box-shadow: inset 0 2px 0 var(--ds-primary);
}

/* ----- Pagination ----------------------------------------------------- */
.page-link { color: var(--ds-text); border-color: var(--ds-border); border-radius: 7px !important; margin: 0 2px; }
.page-item.active .page-link { background: var(--ds-primary); border-color: var(--ds-primary); }
.page-item.disabled .page-link { color: var(--ds-muted-2); }

/* ----- Utility ------------------------------------------------------- */
.ds-divider {
  height: 1px; background: var(--ds-border); margin: 1.25rem 0;
  border: none; opacity: 1;
}
.ds-soft-bg { background: var(--ds-surface-2); }
.ds-border  { border: 1px solid var(--ds-border); }
.ds-rounded { border-radius: var(--ds-radius); }
.ds-shadow  { box-shadow: var(--ds-shadow-sm); }

.fw-bold { font-weight: 700 !important; }
.fw-semibold { font-weight: 600 !important; }

/* Display serif helper (başlık vurguları için) */
.ds-display { font-family: var(--ds-font-display); letter-spacing: -.015em; }

/* Selection */
::selection { background: rgba(15,110,92,.18); color: var(--ds-text); }

/* Focus ring on all focusable elements */
*:focus-visible {
  outline: 2px solid var(--ds-primary);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ----- Fancy "section" hero block --------------------------------------- */
.ds-hero {
  background:
    radial-gradient(800px 280px at 0% 0%, rgba(15,110,92,.12), transparent 60%),
    radial-gradient(600px 220px at 100% 0%, rgba(176,125,43,.12), transparent 60%),
    linear-gradient(180deg, var(--ds-surface), #faf6ec 60%);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-xl);
  padding: 1.6rem 1.8rem;
  box-shadow: var(--ds-shadow-sm);
}

/* ----- Page-load reveal (nazik, editöryel) ----------------------------- */
@keyframes dsRise {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
main > .container,
main > .container-fluid,
main > .ds-page-header,
main > .row {
  animation: dsRise .45s cubic-bezier(.22,.61,.36,1) both;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}