/* ============================================
   DEĞERÖLÇ - TEMEL STİL DOSYASI
   ============================================
   Renk/tipografi değerleri CSS değişkenleri (variables) olarak tanımlanır.
   Böylece dark/light mode arasında geçiş, sadece bir sınıf (class) eklemekle olur.
*/

:root {
  /* --- Renkler: Dark mode (varsayılan) --- */
  --bg: #0B1120;
  --bg-elevated: #131B2E;
  --bg-card: #161F35;
  --border: #23304A;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;

  --accent-from: #3B82F6;
  --accent-to: #22D3EE;
  --accent-solid: #3B82F6;

  --success: #10B981;
  --warning: #F59E0B;
  --danger: #F87171;

  /* --- Tipografi --- */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* --- Ölçüler --- */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);

  color-scheme: dark;
}

/* Light mode: body'e .light-mode class'ı eklenince bu değerler devreye girer */
body.light-mode {
  --bg: #F8FAFC;
  --bg-elevated: #FFFFFF;
  --bg-card: #FFFFFF;
  --border: #E2E8F0;
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;

  --shadow-card: 0 8px 30px rgba(15, 23, 42, 0.08);

  color-scheme: light;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.5;
  min-height: 100vh;
  transition: background 0.25s ease, color 0.25s ease;
  padding-bottom: env(safe-area-inset-bottom);
}

/* ============ ÜST BAR ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding-top: env(safe-area-inset-top);
}

.topbar__inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand__mark {
  color: var(--accent-solid);
  font-size: 1.1rem;
}

.brand__name strong {
  background: linear-gradient(120deg, var(--accent-from), var(--accent-to));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:active {
  transform: scale(0.92);
}

/* ============ SAYFA / HERO ============ */
.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.hero {
  margin-bottom: 28px;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-solid);
  margin-bottom: 10px;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 6vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 12px;
}

.hero__desc {
  color: var(--text-secondary);
  font-size: 0.98rem;
  max-width: 46ch;
}

/* ============ FORM KARTI ============ */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.progress {
  height: 4px;
  background: var(--border);
  border-radius: 999px;
  margin-bottom: 24px;
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  width: 10%;
  background: linear-gradient(90deg, var(--accent-from), var(--accent-to));
  border-radius: 999px;
  transition: width 0.35s ease;
}

.step__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 16px;
}

/* ============ ARAMA KUTUSU (autocomplete) ============ */
.search-box {
  position: relative;
}

.search-box__input {
  width: 100%;
  height: 52px;
  padding: 0 16px 0 44px;
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search-box__input::placeholder {
  color: var(--text-muted);
}

.search-box__input:focus {
  border-color: var(--accent-solid);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-solid) 18%, transparent);
}

.search-box__icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.suggestions {
  list-style: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  max-height: 280px;
  overflow-y: auto;
  z-index: 20;
}

.suggestions[hidden] {
  display: none;
}

.suggestions__item {
  padding: 12px 16px;
  cursor: pointer;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.suggestions__item:last-child {
  border-bottom: none;
}

.suggestions__item:hover,
.suggestions__item.is-active {
  background: color-mix(in srgb, var(--accent-solid) 12%, transparent);
}

.suggestions__brand {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.suggestions__empty {
  padding: 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.selected-device {
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: color-mix(in srgb, var(--success) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--success) 30%, transparent);
  border-radius: var(--radius-sm);
  color: var(--success);
  font-size: 0.9rem;
  font-weight: 500;
}

.selected-device[hidden] {
  display: none;
}

/* ============ ADIM İPUCU METNİ ============ */
.step__hint {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 16px;
}

.step[hidden] {
  display: none;
}

/* ============ SİTE SEÇİM IZGARASI ============ */
.site-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

@media (min-width: 420px) {
  .site-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.site-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  user-select: none;
}

.site-chip:has(input:checked) {
  border-color: var(--accent-solid);
  background: color-mix(in srgb, var(--accent-solid) 10%, transparent);
}

.site-chip input {
  accent-color: var(--accent-solid);
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

.site-chip span {
  font-size: 0.9rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============ SİHİRBAZ GEZİNME BUTONLARI ============ */
.wizard-nav {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.btn {
  flex: 1;
  height: 50px;
  border-radius: var(--radius-md);
  border: none;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn--primary {
  background: linear-gradient(120deg, var(--accent-from), var(--accent-to));
  color: #06111F;
}

.btn--ghost {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
  flex: 0 0 100px;
}

.btn--full {
  flex: 1 1 100%;
}

/* ============ FORM ALANLARI (SELECT / INPUT) ============ */
.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field--full {
  grid-column: 1 / -1;
  margin-bottom: 14px;
}

.field__label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.field__input {
  height: 46px;
  padding: 0 12px;
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  outline: none;
  transition: border-color 0.15s ease;
}

.field__input:focus {
  border-color: var(--accent-solid);
}

.field__textarea {
  height: auto;
  padding: 10px 12px;
  resize: vertical;
  font-family: var(--font-body);
}

.field-group__title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 18px 0 10px;
}

/* ============ TOGGLE (HASAR/AKSESUAR) IZGARASI ============ */
.toggle-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 8px;
}

@media (min-width: 420px) {
  .toggle-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.toggle-chip {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 12px;
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  transition: border-color 0.15s ease, background 0.15s ease;
  user-select: none;
}

.toggle-chip:has(input:checked) {
  border-color: var(--warning);
  background: color-mix(in srgb, var(--warning) 10%, transparent);
}

.toggle-chip input {
  accent-color: var(--warning);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ============ YÜKLENİYOR DURUMU ============ */
.loading-state {
  text-align: center;
  padding: 48px 20px;
}

.loading-state[hidden] {
  display: none;
}

.loading-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-solid);
  border-radius: 50%;
  margin: 0 auto 18px;
  animation: spin 0.8s linear infinite;
}

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

.loading-state__text {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* ============ HATA DURUMU ============ */
.error-state {
  text-align: center;
  padding: 32px 20px;
  background: color-mix(in srgb, var(--danger) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  border-radius: var(--radius-lg);
}

.error-state[hidden] {
  display: none;
}

.error-state p {
  color: var(--danger);
  margin-bottom: 14px;
  font-size: 0.92rem;
}

/* ============ SONUÇ SAYFASI ============ */
.result-section[hidden] {
  display: none;
}

.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
}

.result-card--hero {
  text-align: center;
  padding: 28px 20px;
  margin-bottom: 16px;
  background: linear-gradient(160deg, var(--bg-card), var(--bg-elevated));
}

.result-card__label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.result-card__price {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 8vw, 2.4rem);
  font-weight: 600;
  background: linear-gradient(120deg, var(--accent-from), var(--accent-to));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 16px;
}

.result-card__value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
}

/* Fiyat aralığı göstergesi (min-max arası cetvel) */
.price-range {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.price-range__bar {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.price-range__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-from), var(--accent-to));
  border-radius: 999px;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 24px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.section-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

/* ============ İLAN LİSTESİ ============ */
.listings-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.listing-item {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease;
}

.listing-item:hover {
  border-color: var(--accent-solid);
}

.listing-item__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 6px;
}

.listing-item__title {
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.35;
}

.listing-item__match {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.listing-item__match--high {
  background: color-mix(in srgb, var(--success) 18%, transparent);
  color: var(--success);
}

.listing-item__match--mid {
  background: color-mix(in srgb, var(--warning) 18%, transparent);
  color: var(--warning);
}

.listing-item__match--low {
  background: color-mix(in srgb, var(--text-muted) 18%, transparent);
  color: var(--text-muted);
}

.listing-item__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.listing-item__price {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
}

/* Erişilebilirlik: klavye ile gezinirken odak görünür olsun */
:focus-visible {
  outline: 2px solid var(--accent-solid);
  outline-offset: 2px;
}

/* Hareket azaltma tercihine saygı */
@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}