/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1923;
  --surface: #1a2a3a;
  --border: #2a3a4a;
  --text: #e8edf4;
  --text-muted: #8a9ab0;
  --amber: #e8a835;
  --amber-hover: #f0b840;
  --success: #4ade80;
  --error: #f87171;
  --font-heading: 'Cormorant Garamond', serif;
  --font-body: 'Libre Franklin', sans-serif;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ========== Header ========== */
.header {
  text-align: center;
  padding: 48px 24px 24px;
}

.header h1 {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--amber);
  margin-bottom: 8px;
}

.header p {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ========== Upload Area ========== */
.upload-area {
  width: 100%;
  max-width: 700px;
  margin: 24px auto;
  padding: 64px 24px;
  border: 2px dashed var(--border);
  border-radius: 12px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
}

.upload-area:hover,
.upload-area.dragover {
  border-color: var(--amber);
  background-color: rgba(232, 168, 53, 0.05);
}

.upload-area__icon {
  font-size: 3rem;
  margin-bottom: 16px;
  color: var(--text-muted);
}

.upload-area__text {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.upload-area__hint {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.upload-area__preview {
  max-width: 100%;
  max-height: 300px;
  border-radius: 8px;
  margin-top: 16px;
  display: none;
}

/* ========== Generate Button ========== */
.generate-btn {
  display: none;
  margin: 24px auto;
  padding: 16px 48px;
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--bg);
  background-color: var(--amber);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.generate-btn:hover {
  background-color: var(--amber-hover);
}

.generate-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========== Loading State ========== */
.loading {
  display: none;
  text-align: center;
  padding: 48px 24px;
}

.loading__spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 24px;
}

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

.loading__text {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ========== Result Section ========== */
.result {
  display: none;
  width: 100%;
  max-width: 900px;
  margin: 24px auto;
  padding: 0 24px;
}

/* ========== Before/After Slider ========== */
.ba-slider {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: 8px;
  aspect-ratio: 16 / 9;
  user-select: none;
}

.ba-slider__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ba-slider__img--after {
  clip-path: inset(0 0 0 50%);
}

.ba-slider__handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  background-color: var(--amber);
  cursor: ew-resize;
  z-index: 2;
  transform: translateX(-50%);
}

.ba-slider__handle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--amber);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}

.ba-slider__label {
  position: absolute;
  bottom: 16px;
  padding: 6px 16px;
  background-color: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: 4px;
  z-index: 1;
}

.ba-slider__label--before { left: 16px; }
.ba-slider__label--after { right: 16px; }

/* ========== Actions Row ========== */
.actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
  flex-wrap: wrap;
}

.actions button {
  padding: 10px 24px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  transition: border-color 0.2s;
}

.actions button:hover {
  border-color: var(--amber);
}

/* ========== Feedback Section ========== */
.feedback {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  padding: 24px;
  border-top: 1px solid var(--border);
}

.feedback__question {
  font-size: 1rem;
  color: var(--text-muted);
}

.feedback__buttons {
  display: flex;
  gap: 16px;
}

.feedback__btn {
  padding: 12px 24px;
  font-size: 1.5rem;
  border-radius: 8px;
  border: 2px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.2s, transform 0.1s;
}

.feedback__btn:hover { transform: scale(1.1); }
.feedback__btn--up:hover, .feedback__btn--up.selected { border-color: var(--success); }
.feedback__btn--down:hover, .feedback__btn--down.selected { border-color: var(--error); }

.feedback__text {
  display: none;
  width: 100%;
  max-width: 500px;
}

.feedback__text textarea {
  width: 100%;
  padding: 12px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  resize: vertical;
  min-height: 80px;
}

.feedback__text button {
  margin-top: 8px;
  padding: 8px 20px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--amber);
  color: var(--bg);
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.feedback__thanks {
  display: none;
  color: var(--success);
  font-size: 1rem;
}

/* ========== Responsive ========== */
@media (max-width: 640px) {
  .header h1 { font-size: 1.8rem; }
  .upload-area { padding: 40px 16px; margin: 16px; }
  .result { padding: 0 16px; }
}