:root {
  color-scheme: light;
  --bg: #f7f4ed;
  --ink: #172421;
  --muted: #61706c;
  --line: #d9d1c4;
  --panel: #fffdf8;
  --accent: #146c63;
  --accent-strong: #0e504a;
  --danger: #9f2f2f;
  --shadow: 0 22px 60px rgba(28, 42, 37, 0.14);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(20, 108, 99, 0.12), transparent 36%),
    linear-gradient(315deg, rgba(184, 94, 54, 0.12), transparent 34%),
    var(--bg);
}

button,
input {
  font: inherit;
}

select {
  font: inherit;
}

.app-shell {
  width: min(1120px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(24px, 5vw, 56px);
  display: grid;
  place-items: center;
  gap: 22px;
}

.workspace {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(320px, 1.18fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}

.intro {
  max-width: 480px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 4.7rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.intro p:not(.eyebrow) {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.18rem);
  line-height: 1.6;
}

.install-button {
  color: var(--accent);
  background: #e4f0eb;
}

.install-button:hover {
  color: white;
  background: var(--accent);
}

.tool-panel {
  width: 100%;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid rgba(23, 36, 33, 0.1);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.88);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.size-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.size-controls label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
}

.size-controls input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  background: white;
}

.size-controls input:focus {
  outline: 3px solid rgba(20, 108, 99, 0.18);
  border-color: var(--accent);
}

.photo-count-field {
  grid-column: 1 / -1;
}

.upload-area {
  position: relative;
  display: grid;
  min-height: 220px;
  border: 2px dashed var(--line);
  border-radius: 8px;
  background: #fbf8f0;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.upload-area.is-dragging {
  border-color: var(--accent);
  background: #eef8f4;
  transform: translateY(-2px);
}

.upload-area input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.upload-label {
  display: grid;
  place-items: center;
  gap: 14px;
  padding: 28px;
  color: var(--muted);
  text-align: center;
  cursor: pointer;
}

.upload-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: white;
  background: var(--accent);
  font-size: 2rem;
  line-height: 1;
}

.upload-label strong {
  display: block;
  color: var(--ink);
  font-size: 1.08rem;
}

.upload-label small {
  display: block;
  margin-top: 6px;
  font-size: 0.92rem;
}

.preview-area {
  display: grid;
  gap: 18px;
}

.preview-pages {
  display: grid;
  justify-items: center;
  gap: 12px;
  max-block-size: 65dvh;
  overflow: auto;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ece7dd;
}

.preview-page {
  position: relative;
  width: 100%;
  background: white;
  box-shadow: 0 1px 4px rgba(23, 36, 33, 0.15);
}

.preview-page img {
  position: absolute;
  object-fit: fill;
}

.photo-actions {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 12px;
}

.button {
  min-height: 48px;
  border: 0;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 150ms ease, background 150ms ease, color 150ms ease;
}

.button:active {
  transform: translateY(1px);
}

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

.button-primary:hover {
  background: var(--accent-strong);
}

.button-secondary {
  color: var(--danger);
  background: #f5e9e4;
}

.button-secondary:hover {
  background: #efd8ce;
}

.status {
  min-height: 1.4em;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.45;
}

.app-footer {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.language-control {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 800;
}

.language-control select {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  background: rgba(255, 253, 248, 0.9);
}

.language-control select:focus {
  outline: 3px solid rgba(20, 108, 99, 0.18);
  border-color: var(--accent);
}

@media (max-width: 760px) {
  .app-shell {
    align-items: start;
    padding: 22px;
  }

  .workspace {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .intro {
    max-width: none;
  }

  .tool-panel {
    padding: 16px;
  }

  .photo-actions {
    grid-template-columns: 1fr;
  }

  .app-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .language-control {
    justify-content: space-between;
  }
}