/* --- Amazon-like Simple Design System --- */
:root {
  --font-sans: Arial, Helvetica, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Clean White Theme */
  --bg: #ffffff;
  --bg-card: #ffffff;
  --border: #e0e0e0;

  --text-primary: #111111;
  --text-secondary: #555555;
  --text-muted: #999999;

  --color-primary: #007185;
  --color-accent-orange: #ff9900;
  --color-accent-yellow: #ffd814;
  --color-success: #067d62;
  --color-error: #d00;
  --color-star: #ffa41c;
}

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

html {
  font-family: var(--font-sans);
  color-scheme: light;
}

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

.gradient-text {
  color: var(--color-primary);
}

/* --- Layout --- */
.app-container {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  gap: 20px;
}

/* --- Header --- */
.app-header {
  text-align: center;
  padding: 20px 0 10px;
}

.logo-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 8px;
}

.app-logo {
  width: 36px;
  height: 36px;
}

.logo-text {
  font-size: 1.6rem;
  font-weight: 600;
  color: #111;
}

.tagline {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* --- Main Card --- */
.main-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.main-title {
  font-size: 1.2rem;
  font-weight: 400;
  text-align: center;
  margin-bottom: 20px;
}

/* --- Tabs --- */
.tabs-nav {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.tab-btn {
  background: none;
  border: none;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-icon {
  opacity: 0.7;
}

/* --- Platform Selector --- */
.platform-selector-wrapper {
  margin-bottom: 16px;
}

.selector-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: block;
}

.platform-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.platform-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.platform-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

/* --- Input Form --- */
.input-section {
  margin-bottom: 16px;
}

.input-form {
  display: flex;
  gap: 8px;
}

@media (max-width: 640px) {
  .input-form { flex-direction: column; }
}

.input-group {
  position: relative;
  flex-grow: 1;
}

.url-input {
  width: 100%;
  padding: 10px 36px 10px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  height: 38px;
}

.url-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 113, 133, 0.1);
}

.input-label {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
  transition: 0.15s ease;
  background: var(--bg-card);
  padding: 0 4px;
}

.url-input:focus ~ .input-label,
.url-input:not(:placeholder-shown) ~ .input-label {
  top: 0;
  transform: translateY(-50%) scale(0.85);
  color: var(--color-primary);
}

.clear-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: none;
}

.url-input:not(:placeholder-shown) ~ .clear-btn {
  display: flex;
}

.fetch-btn {
  background: var(--color-accent-yellow);
  border: 1px solid #fcd200;
  border-radius: 20px;
  padding: 0 24px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: #111;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  height: 38px;
}

.fetch-btn:hover {
  background: #f7ca00;
  border-color: #f2c200;
}

.btn-loader { display: flex; }
.btn-loader[hidden] { display: none; }

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0,0,0,0.15);
  border-top-color: #111;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.error-msg {
  color: var(--color-error);
  font-size: 0.85rem;
  margin-top: 6px;
}

/* --- Results --- */
.results-card {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  margin-top: 8px;
}

.results-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 768px) {
  .results-layout { grid-template-columns: 1fr; }
}

.media-preview-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.media-preview-graphic {
  width: 100%;
  aspect-ratio: 16/9;
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  background: #f7f7f7;
  border: 1px solid var(--border);
}

.video-thumbnail {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.preview-svg { width: 100%; height: 100%; }

.duration-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  padding: 2px 6px;
  border-radius: 2px;
  font-size: 0.8rem;
  color: #fff;
  z-index: 2;
}

.video-title { font-size: 1rem; font-weight: 600; line-height: 1.3; }

.video-meta { display: flex; gap: 8px; flex-wrap: wrap; }

.meta-tag {
  font-size: 0.8rem;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 2px 8px;
}

.platform-tag {
  border-color: var(--platform-accent, var(--color-primary));
  color: #fff;
  background: var(--platform-accent, var(--color-primary));
}

/* Download Options */
.download-options { display: flex; flex-direction: column; gap: 12px; }

.options-title { font-size: 1rem; font-weight: 600; }

.option-row {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.option-row:hover { background: #f7f7f7; }

.option-quality { font-weight: 600; font-size: 0.9rem; }

.option-details { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }

.download-option-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 16px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text-primary);
}

.download-option-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* --- Progress --- */
.download-progress-container {
  margin-top: 20px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.progress-status { color: var(--text-secondary); }
.progress-percent { color: var(--color-primary); }

.progress-bar-wrapper {
  width: 100%;
  height: 6px;
  background: #f0f0f0;
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  width: 0%;
}

.cancel-download-btn {
  background: none;
  border: none;
  color: var(--color-error);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  cursor: pointer;
  margin-top: 8px;
  padding: 4px 0;
}

/* --- Review Modal --- */
.review-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.review-modal-overlay.active { display: flex; }

.review-modal {
  background: var(--bg-card);
  border-radius: 8px;
  padding: 28px;
  width: 90%;
  max-width: 440px;
  position: relative;
}

.modal-close-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}

.modal-title { font-size: 1.2rem; font-weight: 600; margin-bottom: 6px; }

.modal-description { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 16px; }

.review-form { display: flex; flex-direction: column; gap: 14px; }

.rating-selection-container {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 12px;
}

.rating-label { font-size: 0.85rem; color: var(--text-secondary); }

.star-select-btn {
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
}

.star-select-btn.active { color: var(--color-star); }

.submit-review-btn {
  margin-top: 4px;
  background: var(--color-accent-yellow);
  border: 1px solid #fcd200;
  border-radius: 20px;
  padding: 10px 24px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  cursor: pointer;
  color: #111;
  width: 100%;
}

.submit-review-btn:hover { background: #f7ca00; }

/* --- Reviews --- */
.reviews-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.reviews-header {
  display: flex;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 16px;
}

@media (max-width: 640px) {
  .reviews-header { flex-direction: column; text-align: center; }
}

.rating-summary-card { text-align: center; min-width: 120px; }

.big-score { font-size: 2rem; font-weight: 700; }

.stars-display { color: var(--color-star); font-size: 1rem; letter-spacing: 2px; }

.rating-count-info { font-size: 0.8rem; color: var(--text-muted); }

.reviews-section-title { font-size: 1.2rem; font-weight: 600; }

.reviews-section-subtitle { font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; }

.reviews-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 400px;
  overflow-y: auto;
}

.review-card { border: 1px solid var(--border); border-radius: 4px; padding: 16px; }

.review-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.review-card-user { display: flex; align-items: center; gap: 8px; }

.review-user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: #fff;
}

.review-user-name { font-weight: 600; font-size: 0.85rem; }

.review-badge {
  font-size: 0.7rem;
  color: var(--color-success);
  border: 1px solid var(--color-success);
  border-radius: 2px;
  padding: 1px 6px;
}

.review-stars { color: var(--color-star); font-size: 0.85rem; }

.review-date { font-size: 0.75rem; color: var(--text-muted); margin-left: 6px; }

.review-card-comment { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.4; }

/* --- Footer --- */
.app-footer {
  text-align: center;
  padding: 20px 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 8px;
}

.footer-links a { color: var(--color-primary); text-decoration: none; font-size: 0.8rem; }
.footer-links a:hover { text-decoration: underline; }

/* --- Toasts --- */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 3000;
  max-width: 360px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.toast-success { border-left: 3px solid var(--color-success); }
.toast-error { border-left: 3px solid var(--color-error); }

.toast-icon { flex-shrink: 0; display: flex; }
.toast-content { flex-grow: 1; font-size: 0.85rem; }

.toast-close { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 2px; }

@keyframes toastOut { to { opacity: 0; transform: translateX(20px); } }