/* ===== Passpic – Light theme ===== */
:root {
  --bg: #f8fafc;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef2ff;
  --success: #16a34a;
  --success-soft: #dcfce7;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 40px rgba(15, 23, 42, 0.08);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.hidden { display: none !important; }

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.logo-mark {
  width: 28px;
  height: 28px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: white;
}

.header-privacy {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.privacy-dot {
  width: 7px;
  height: 7px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.18);
}

/* ===== Hero ===== */
.hero {
  padding: 2.75rem 0 1.75rem;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid #c7d2fe;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  margin-bottom: 1.1rem;
}

.hero h1 {
  font-size: clamp(1.7rem, 4.5vw, 2.25rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.hero-sub {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 480px;
  margin: 0 auto 2rem;
  line-height: 1.55;
}

/* ===== Select zone (no upload metaphor) ===== */
.select-zone {
  background: var(--bg-elevated);
  border: 1.5px solid var(--border-strong);
  border-radius: 16px;
  padding: 2.25rem 1.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  max-width: 480px;
  margin: 0 auto;
  outline: none;
  box-shadow: var(--shadow);
}

.select-zone:hover,
.select-zone:focus-visible,
.select-zone.dragover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.select-zone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
}

.select-icon {
  color: var(--primary);
  opacity: 0.9;
}

.select-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.select-text strong {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.select-text span {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Trust row */
.trust-row {
  display: flex;
  justify-content: center;
  gap: 1.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.trust-item svg {
  color: var(--success);
  flex-shrink: 0;
}

/* ===== Prominent Presets ===== */
.presets-section {
  padding: 0.5rem 0 1.75rem;
}

.presets-header {
  text-align: center;
  margin-bottom: 1rem;
}

.presets-header h2 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
}

.presets-header p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.65rem;
  max-width: 720px;
  margin: 0 auto;
}

.preset-card {
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 0.75rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.preset-card:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-1px);
}

.preset-card.active {
  border-color: var(--primary);
  background: var(--primary-soft);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.preset-card .preset-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  display: block;
  margin-bottom: 0.15rem;
}

.preset-card .preset-spec {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.preset-card.active .preset-name {
  color: var(--primary);
}

/* ===== Queue ===== */
.queue {
  padding: 1.25rem 0 2.5rem;
  border-top: 1px solid var(--border);
  background: #f1f5f9;
}

.queue-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.1rem;
  flex-wrap: wrap;
}

.queue-title {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.queue-title h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.count {
  background: var(--primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  min-width: 1.5rem;
  text-align: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 550;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.15s;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-ghost {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover:not(:disabled) {
  background: #f8fafc;
  color: var(--text);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid transparent;
}

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

/* Image cards */
.image-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.image-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.image-card-inner {
  display: grid;
  grid-template-columns: 130px 1fr;
}

@media (min-width: 640px) {
  .image-card-inner.has-result {
    grid-template-columns: 120px 120px 1fr;
  }
}

@media (max-width: 639px) {
  .image-card-inner {
    grid-template-columns: 1fr;
  }
  .image-card-inner.has-result {
    grid-template-columns: 1fr 1fr;
  }
  .image-card-inner.has-result .controls-col {
    grid-column: 1 / -1;
  }
}

.preview-col {
  background: #f1f5f9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.85rem;
  min-height: 120px;
  position: relative;
}

.preview-col img {
  max-width: 100%;
  max-height: 110px;
  object-fit: contain;
  border-radius: 6px;
}

.preview-label {
  position: absolute;
  top: 0.4rem;
  left: 0.4rem;
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: rgba(15, 23, 42, 0.7);
  color: white;
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
}

.result-preview {
  border-left: 1px solid var(--border);
}

@media (max-width: 639px) {
  .result-preview {
    border-left: none;
    border-top: 1px solid var(--border);
  }
}

.controls-col {
  padding: 1.1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.file-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.85rem;
}

.file-name {
  font-weight: 600;
  font-size: 0.9rem;
  word-break: break-all;
}

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

.size-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  background: var(--success-soft);
  color: var(--success);
}

.size-badge.worse {
  background: var(--danger-soft);
  color: var(--danger);
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.control-group label {
  font-size: 0.68rem;
  font-weight: 550;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.control-group input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
  height: 5px;
}

.control-group input[type="number"],
.control-group select {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 7px;
  padding: 0.4rem 0.55rem;
  font-family: inherit;
  font-size: 0.85rem;
  width: 100%;
}

.control-group input[type="number"]:focus,
.control-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.range-value {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
}

.status-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* How it works */
.how {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 640px) {
  .how-grid {
    grid-template-columns: 1fr;
    gap: 1.1rem;
  }
}

.how-step {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
}

.step-num {
  width: 28px;
  height: 28px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.how-step strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.1rem;
}

.how-step p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Footer */
.footer {
  padding: 1.5rem 0;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
  background: var(--bg-elevated);
}