/* Koala Cafe — ortak tasarım dili
   Renkler Instagram'daki logodan: koyu çikolata kahvesi + krem. */
:root {
  color-scheme: light;

  /* Primitifler (bileşenlerde doğrudan kullanılmaz) */
  --cream-50: #faf8f0;
  --cream-100: #f4f0e1; /* marka zemin rengi */
  --cream-200: #eae3cf;
  --cream-300: #dcd2b8;
  --brown-400: #a88b75;
  --brown-500: #9a7c67;
  --brown-600: #765645;
  --brown-800: #52300f;
  --brown-900: #3b1e01; /* marka logo rengi */
  --sage-100: #e5eee1;
  --sage-700: #3d6b45;
  --red-100: #f8e3de;
  --red-700: #9c3324;
  --white: #ffffff;

  /* Semantik roller */
  --color-bg-page: var(--cream-50);
  --color-bg-surface: var(--white);
  --color-bg-subtle: var(--cream-100);
  --color-bg-hover: var(--cream-200);
  --color-border: var(--cream-300);
  --color-border-subtle: var(--cream-200);
  --color-border-control: var(--brown-500); /* form alanları: beyaz ve krem üzerinde ≥3:1 */
  --color-text-primary: var(--brown-900);
  --color-text-secondary: var(--brown-600);
  --color-text-muted: var(--brown-600);
  --color-icon-decorative: var(--brown-400);
  --color-accent-solid: var(--brown-900);
  --color-accent-solid-hover: var(--brown-800);
  --color-on-accent: var(--cream-50);
  --color-success-bg: var(--sage-100);
  --color-success-text: var(--sage-700);
  --color-danger-bg: var(--red-100);
  --color-danger-text: var(--red-700);
  --color-danger-solid: var(--red-700);
  --color-focus: var(--brown-900);

  /* Tipografi ölçeği */
  --font-sans: "Nunito", ui-rounded, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --text-caption: 0.8125rem;  /* 13 */
  --text-ui-sm: 0.875rem;     /* 14 */
  --text-body: 1rem;          /* 16 */
  --text-lg: 1.125rem;        /* 18 */
  --text-title: 1.375rem;     /* 22 */
  --text-display: 1.75rem;    /* 28 */

  /* Aralıklar */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  /* Köşeler (dış = iç + boşluk) */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --shadow-card: 0 0 0 1px rgb(58 35 24 / 0.06), 0 1px 2px rgb(58 35 24 / 0.06), 0 2px 8px rgb(58 35 24 / 0.04);
  --shadow-raised: 0 0 0 1px rgb(58 35 24 / 0.06), 0 4px 12px rgb(58 35 24 / 0.08), 0 16px 40px rgb(58 35 24 / 0.12);

  --ease-out: cubic-bezier(0.2, 0, 0, 1);
  --page-pad: 16px;
}

*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-bg-page);
}
[hidden] { display: none !important; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.15; text-wrap: balance; }
img { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--cream-300); color: var(--brown-900); }

:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; inset-inline-start: var(--space-2); top: var(--space-2); z-index: 100;
  padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm);
  background: var(--color-accent-solid); color: var(--color-on-accent); font-weight: 700;
  transform: translateY(-200%);
}
.skip-link:focus-visible { transform: none; }

.num { font-variant-numeric: tabular-nums; white-space: nowrap; }

.icon { width: 20px; height: 20px; flex: none; stroke: currentColor; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.icon--sm { width: 16px; height: 16px; }

/* Butonlar */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: 44px; padding: 0 var(--space-4);
  border: 0; border-radius: var(--radius-md);
  font-size: var(--text-body); font-weight: 700; line-height: 1.2; white-space: nowrap;
  text-decoration: none; cursor: pointer; user-select: none; -webkit-user-select: none; touch-action: manipulation;
  background: var(--color-bg-subtle); color: var(--color-text-primary);
  box-shadow: inset 0 0 0 1px var(--color-border);
  transition-property: scale, background-color, box-shadow;
  transition-duration: 150ms;
  transition-timing-function: var(--ease-out);
}
.btn:active:not(:disabled) { scale: 0.96; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn--primary { background: var(--color-accent-solid); color: var(--color-on-accent); box-shadow: none; }
.btn--danger { background: var(--color-danger-solid); color: var(--white); box-shadow: none; }
.btn--ghost { background: transparent; box-shadow: none; }
.btn--block { width: 100%; }
.btn--icon { padding: 0; width: 44px; }
@media (hover: hover) {
  .btn:hover:not(:disabled) { background: var(--color-bg-hover); }
  .btn--primary:hover:not(:disabled) { background: var(--color-accent-solid-hover); }
  .btn--danger:hover:not(:disabled) { background: #862b1e; }
  .btn--ghost:hover:not(:disabled) { background: var(--color-bg-subtle); }
}

/* Form alanları */
.field { display: grid; gap: var(--space-1); }
.field__label { font-size: var(--text-ui-sm); font-weight: 700; }
.field__hint { font-size: var(--text-caption); color: var(--color-text-secondary); }
.field__error { font-size: var(--text-caption); color: var(--color-danger-text); font-weight: 600; }
.input {
  width: 100%; min-height: 44px; padding: 10px var(--space-3);
  font-size: 16px; /* iOS yakınlaştırmasın */
  background: var(--color-bg-surface); border: 1px solid var(--color-border-control); border-radius: var(--radius-md);
  transition-property: border-color, box-shadow; transition-duration: 150ms;
}
.input:focus-visible { outline: none; border-color: var(--color-focus); box-shadow: 0 0 0 2px var(--color-focus); }
.input[aria-invalid="true"] { border-color: var(--color-danger-text); }
textarea.input { min-height: 88px; resize: vertical; line-height: 1.5; }

/* Toast */
.toast-region {
  position: fixed; inset-inline: 0; bottom: calc(var(--space-4) + env(safe-area-inset-bottom)); z-index: 90;
  display: grid; justify-items: center; pointer-events: none; padding-inline: var(--space-4);
}
.toast {
  display: flex; align-items: center; gap: var(--space-3);
  max-width: 480px; padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  min-height: 48px;
  background: var(--brown-900); color: var(--cream-50); border-radius: var(--radius-md);
  box-shadow: var(--shadow-raised); pointer-events: auto; font-weight: 600;
  animation: toast-in 200ms var(--ease-out);
}
.toast--error { background: var(--color-danger-solid); color: var(--white); }
.toast .btn { min-height: 36px; background: transparent; color: inherit; box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.35); }
@keyframes toast-in { from { opacity: 0; translate: 0 8px; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; transition-duration: 1ms !important; scroll-behavior: auto !important; }
  .btn:active:not(:disabled) { scale: 1; }
}
h1[tabindex="-1"]:focus { outline: none; }