/* ===== Yunus Yapboz — Çocuklar için, sıcak ve profesyonel ===== */
:root {
  --bg: #fef8f0;
  --bg-pattern: radial-gradient(ellipse at 50% 0%, rgba(255, 200, 150, 0.25) 0%, transparent 50%);
  --surface: #fff;
  --surface-2: #fff8f0;
  --border: #ecdcc8;
  --text: #3d3428;
  --text-muted: #7a6b5c;
  --accent: #e87a3c;
  --accent-hover: #d96a2e;
  --accent-soft: rgba(232, 122, 60, 0.12);
  --success: #2ecc71;
  --success-soft: rgba(46, 204, 113, 0.15);
  --radius: 24px;
  --radius-sm: 16px;
  --radius-btn: 14px;
  --shadow: 0 4px 24px rgba(61, 52, 40, 0.06);
  --shadow-hover: 0 8px 32px rgba(61, 52, 40, 0.1);
  --safe-top: env(safe-area-inset-top);
  --safe-bottom: env(safe-area-inset-bottom);
}

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

html {
  font-size: 18px;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  background-image: var(--bg-pattern);
  color: var(--text);
  min-height: 100dvh;
  min-height: 100vh;
  overflow-x: hidden;
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
}

.app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  max-width: 520px;
  margin: 0 auto;
}

/* ===== Header ===== */
.header {
  padding: 1.25rem 1.25rem 0.75rem;
  text-align: center;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

.tagline {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  max-width: 20em;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Main ===== */
.main {
  flex: 1;
  padding: 0 1.25rem 1.25rem;
}

/* ===== Upload ===== */
.upload-section {
  animation: fadeIn 0.3s ease;
}

.upload-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border: 2px solid var(--border);
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  text-align: center;
}

.samples-section {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 2px dashed var(--border);
}

.samples-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.75rem;
  text-align: center;
}

.samples-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.sample-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.sample-btn:hover,
.sample-btn:focus {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: scale(1.02);
  box-shadow: var(--shadow-hover);
}

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

.sample-thumb {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 10px;
  overflow: hidden;
  background: var(--border);
}

.sample-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sample-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
}

.upload-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 160px;
  border: 3px dashed var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.upload-area:hover,
.upload-area:focus-within,
.upload-area.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.upload-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.upload-text {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

.upload-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.difficulty-section {
  margin-top: 1.5rem;
}

.difficulty-label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.difficulty-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.diff-btn {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.85rem 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-btn);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s;
}

.diff-btn:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.diff-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ===== Game ===== */
.game-section {
  position: relative;
  animation: fadeIn 0.3s ease;
}

.game-section.hidden,
.upload-section.hidden {
  display: none !important;
}

.game-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.btn {
  font-family: inherit;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
}

.btn:active {
  transform: scale(0.97);
}

.btn-back {
  padding: 0.6rem 0.9rem;
  font-size: 0.95rem;
  background: var(--surface-2);
  color: var(--text);
}

.btn-back:hover {
  background: var(--border);
}

.btn-action {
  padding: 0.6rem 1rem;
  font-size: 0.95rem;
  background: var(--accent);
  color: #fff;
}

.btn-action:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-hover);
}

.btn-small {
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
  background: var(--surface-2);
  color: var(--text);
  border: 2px solid var(--border);
}

.btn-small:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.btn-big {
  padding: 0.9rem 1.25rem;
  font-size: 1.05rem;
  width: 100%;
  background: var(--accent);
  color: #fff;
}

.btn-big:hover {
  background: var(--accent-hover);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent-soft);
}

.progress-block {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
}

.progress-bar-wrap {
  flex: 1;
  height: 10px;
  background: var(--surface-2);
  border-radius: 5px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: 5px;
  transition: width 0.25s ease;
}

.progress-pct {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  min-width: 2.5rem;
}

.game-area {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.ref-panel {
  flex-shrink: 0;
  width: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--border);
  background: var(--surface);
}

.ref-panel.hidden {
  display: none;
}

.ref-image {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.puzzle-wrapper {
  flex: 1;
  min-width: 0;
  min-height: 200px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.puzzle-board {
  position: relative;
  width: 100%;
  min-width: 180px;
  min-height: 180px;
  aspect-ratio: 1;
  max-width: 100%;
  margin: 0 auto;
  background: var(--surface-2);
  border-radius: 10px;
  overflow: hidden;
  background-image:
    linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px);
  background-size: calc(100% / var(--cols, 3)) calc(100% / var(--cols, 3));
}

/* Parça havuzu ===== */
.piece-pool-section {
  margin-top: 1rem;
  padding: 0.75rem;
  min-height: 100px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
}

.piece-pool-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.piece-pool {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.25rem 0;
  min-height: 0;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x;
}

.piece-pool .puzzle-piece {
  position: relative;
  flex-shrink: 0;
  flex-grow: 0;
  border-radius: 6px;
  touch-action: none;
}

.puzzle-piece {
  background-repeat: no-repeat;
  border: 2px solid rgba(0, 0, 0, 0.08);
  cursor: grab;
  touch-action: none;
  transition: box-shadow 0.2s;
}

.puzzle-board .puzzle-piece {
  position: absolute;
  background-size: var(--board-size) var(--board-size);
}

.puzzle-piece:active,
.puzzle-piece.dragging {
  cursor: grabbing;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.puzzle-piece.placed {
  cursor: default;
  pointer-events: none;
  border-color: transparent;
}

.puzzle-piece.piece-correct-flash {
  animation: correctFlash 0.5s ease;
}

@keyframes correctFlash {
  0% { box-shadow: 0 0 0 0 var(--success); filter: brightness(1.1); }
  50% { box-shadow: 0 0 16px 4px var(--success); filter: brightness(1.2); }
  100% { box-shadow: 0 0 0 2px var(--success-soft); filter: brightness(1); }
}

.puzzle-drag-clone {
  cursor: grabbing;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.game-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.mini-stat strong {
  color: var(--text);
}

/* Loading ===== */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(245, 244, 251, 0.95);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 150;
}

.loading-overlay.hidden {
  display: none !important;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.loading-text {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Complete overlay ===== */
.complete-overlay {
  position: fixed;
  inset: 0;
  background: rgba(45, 42, 66, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 200;
  animation: fadeIn 0.25s ease;
}

.complete-overlay.hidden {
  display: none !important;
}

.complete-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  max-width: 340px;
  width: 100%;
  box-shadow: var(--shadow-hover);
  animation: scaleIn 0.3s ease;
}

.complete-emoji {
  font-size: 4rem;
  display: block;
  margin-bottom: 0.5rem;
}

.complete-card h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.complete-stats {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.complete-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Footer ===== */
.footer {
  padding: 1rem 1.25rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* Aferin toast (ses yoksa da görünsün, özellikle iPhone) */
.aferin-toast {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  transform: translateX(-50%) translateY(20px);
  padding: 0.85rem 1.5rem;
  background: var(--success);
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  border-radius: 999px;
  box-shadow: 0 4px 20px rgba(0, 200, 83, 0.4);
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  max-width: calc(100vw - 2rem);
}

.aferin-toast-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.aferin-toast-hide {
  opacity: 0;
  transform: translateX(-50%) translateY(10px);
}