/* =========================================================
   Esbi Bilişim — Başvuru Formu
   Design tokens, light/dark mode, form styles
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  /* Brand */
  --brand-primary: #c40001;
  --brand-secondary: #700000;
  --brand-accent: #a30001;
  --brand-glow: rgba(196, 0, 1, 0.18);

  /* Light surface */
  --bg: #f7f7f8;
  --bg-grad-1: #fbfbfc;
  --bg-grad-2: #efeff1;
  --card: #ffffff;
  --card-elevated: #ffffff;
  --text: #1a1a1a;
  --text-muted: #5b5b62;
  --text-subtle: #8a8a92;
  --border: #e5e5e8;
  --border-strong: #d0d0d4;
  --input-bg: #ffffff;
  --input-border: #d8d8de;
  --success-bg: #ecfdf3;
  --success-text: #027a48;
  --success-border: #abefc6;
  --error-text: #b42318;
  --shadow-sm: 0 1px 2px rgba(15, 15, 16, 0.04), 0 1px 3px rgba(15, 15, 16, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 15, 16, 0.06), 0 8px 24px rgba(15, 15, 16, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 15, 16, 0.10), 0 24px 48px rgba(15, 15, 16, 0.12);

  /* Radius */
  --radius-card: 16px;
  --radius-input: 10px;
  --radius-btn: 10px;
  --radius-pill: 999px;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* Type */
  --font-sans: 'Poppins', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --fs-xs: 12px;
  --fs-sm: 14px;
  --fs-base: 16px;
  --fs-lg: 18px;
  --fs-xl: 22px;
  --fs-2xl: 28px;
  --fs-3xl: 36px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 150ms;
  --dur-base: 220ms;
  --dur-slow: 320ms;

  /* Z-index */
  --z-toast: 1000;
}

[data-theme="dark"] {
  --bg: #0f0f10;
  --bg-grad-1: #131316;
  --bg-grad-2: #0a0a0c;
  --card: #1a1a1c;
  --card-elevated: #202024;
  --text: #f5f5f5;
  --text-muted: #b0b0b6;
  --text-subtle: #7a7a82;
  --border: #2a2a2e;
  --border-strong: #3a3a40;
  --input-bg: #18181b;
  --input-border: #2e2e34;
  --success-bg: #052e1c;
  --success-text: #6ce9a6;
  --success-border: #074d2c;
  --error-text: #fda19b;
  --brand-glow: rgba(196, 0, 1, 0.28);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5), 0 24px 48px rgba(0, 0, 0, 0.6);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 10% -10%, var(--brand-glow), transparent 60%),
    linear-gradient(180deg, var(--bg-grad-1), var(--bg-grad-2));
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100dvh;
  transition: background-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

img { max-width: 100%; display: block; }

/* ---------- Layout ---------- */
.app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.app-header {
  padding: var(--space-5) var(--space-5) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.brand-logo {
  height: 50px;
  width: auto;
}

.brand-logo--light { display: block; }
.brand-logo--dark { display: none; }
[data-theme="dark"] .brand-logo--light { display: none; }
[data-theme="dark"] .brand-logo--dark { display: block; }

.theme-toggle {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-fast) var(--ease-out),
              background-color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.theme-toggle:hover { transform: translateY(-1px); border-color: var(--border-strong); }
.theme-toggle:active { transform: translateY(0) scale(0.97); }
.theme-toggle:focus-visible {
  outline: 3px solid var(--brand-primary);
  outline-offset: 2px;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.app-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-4);
}

.app-footer {
  text-align: center;
  padding: var(--space-5);
  color: var(--text-subtle);
  font-size: var(--fs-sm);
}
.app-footer a { color: var(--text-muted); text-decoration: none; }
.app-footer a:hover { color: var(--brand-primary); }

/* ---------- Card ---------- */
.card {
  width: 100%;
  max-width: 480px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--space-7) var(--space-6) var(--space-6);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  animation: card-in var(--dur-slow) var(--ease-out) both;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-secondary), var(--brand-primary), var(--brand-accent));
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(8px) scale(0.99); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.card-header { margin-bottom: var(--space-6); }
.card-title {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-2xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.card-subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

/* ---------- Form ---------- */
.form { display: flex; flex-direction: column; gap: var(--space-4); }

.field { display: flex; flex-direction: column; gap: var(--space-2); }

.field-label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text);
}
.field-label .required-mark {
  color: var(--brand-primary);
  margin-left: 2px;
}

.input {
  appearance: none;
  width: 100%;
  height: 48px;
  padding: 0 var(--space-4);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-input);
  font-size: var(--fs-base);
  color: var(--text);
  transition: border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              background-color var(--dur-base) var(--ease-out);
}
.input::placeholder { color: var(--text-subtle); }
.input:hover { border-color: var(--border-strong); }
.input:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px var(--brand-glow);
}
.field--error .input {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px var(--brand-glow);
}

.field-error {
  font-size: var(--fs-xs);
  color: var(--error-text);
  min-height: 1.1em;
  margin: 0;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.field--error .field-error {
  opacity: 1;
  transform: translateY(0);
}

/* Honeypot field — visually and a11y hidden, but in DOM */
.honeypot {
  position: absolute !important;
  left: -10000px !important;
  top: auto !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
}

/* ---------- Button ---------- */
.btn {
  appearance: none;
  width: 100%;
  height: 52px;
  border: none;
  border-radius: var(--radius-btn);
  font-size: var(--fs-base);
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background: var(--brand-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(196, 0, 1, 0.25), 0 1px 2px rgba(0, 0, 0, 0.08);
  transition: transform var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
  margin-top: var(--space-2);
}
.btn:hover {
  background: var(--brand-accent);
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(196, 0, 1, 0.32), 0 1px 2px rgba(0, 0, 0, 0.08);
}
.btn:active { transform: translateY(0) scale(0.98); }
.btn:focus-visible {
  outline: 3px solid var(--brand-primary);
  outline-offset: 3px;
}
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.7;
  transform: none;
}

.btn .spinner {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.35);
  border-top-color: #fff;
  animation: spin 0.8s linear infinite;
  display: none;
}
.btn[data-loading="true"] .spinner { display: inline-block; }
.btn[data-loading="true"] .btn-label-default { display: none; }
.btn .btn-label-loading { display: none; }
.btn[data-loading="true"] .btn-label-loading { display: inline; }

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

/* ---------- Success / Error states ---------- */
.success-state, .error-state {
  text-align: center;
  padding: var(--space-5) var(--space-2);
  animation: card-in var(--dur-slow) var(--ease-out) both;
}

.success-state .icon-wrap,
.error-state .icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}
.success-state .icon-wrap {
  background: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border);
}
.error-state .icon-wrap {
  background: var(--brand-glow);
  color: var(--brand-primary);
}
.success-state h2, .error-state h2 {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-xl);
  font-weight: 600;
}
.success-state p, .error-state p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--fs-sm);
}
.error-state .btn-retry {
  margin-top: var(--space-5);
  display: inline-block;
  background: transparent;
  color: var(--brand-primary);
  border: 1px solid var(--brand-primary);
  padding: 10px 20px;
  border-radius: var(--radius-btn);
  cursor: pointer;
  font-weight: 500;
  font-size: var(--fs-sm);
  transition: background-color var(--dur-fast) var(--ease-out);
}
.error-state .btn-retry:hover { background: var(--brand-glow); }

.hidden { display: none !important; }

/* ---------- Loading skeleton (initial form fetch) ---------- */
.skeleton {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.skel-row {
  height: 48px;
  border-radius: var(--radius-input);
  background: linear-gradient(90deg, var(--border) 0%, var(--card-elevated) 50%, var(--border) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.4s var(--ease-in-out) infinite;
}
.skel-row.short { width: 40%; height: 16px; }
@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* ---------- Responsive ---------- */
@media (max-width: 480px) {
  .app-header { padding: var(--space-4) var(--space-4) 0; }
  .card { padding: var(--space-6) var(--space-5) var(--space-5); }
  .card-title { font-size: var(--fs-xl); }
  .brand-logo { height: 30px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}