:root {
  color-scheme: light;
  --bg: #f3f6fb;
  --bg-strong: #ffffff;
  --surface: #ffffff;
  --surface-soft: #eef5f7;
  --surface-raised: rgba(255, 255, 255, 0.9);
  --text: #182230;
  --muted: #667085;
  --line: #d7e0ea;
  --line-strong: #bac8d6;
  --accent: #0f766e;
  --accent-dark: #0b5f59;
  --accent-soft: #ddf7f3;
  --accent-ring: rgba(15, 118, 110, 0.18);
  --danger: #b42318;
  --danger-soft: #fee4e2;
  --success: #067647;
  --success-soft: #dcfae6;
  --info: #175cd3;
  --info-soft: #e6f0ff;
  --shadow: 0 22px 70px rgba(27, 39, 54, 0.14);
  --shadow-soft: 0 12px 34px rgba(27, 39, 54, 0.08);
  --disabled-bg: #e7edf3;
  --disabled-text: #8a98a8;
}

body.dark-theme {
  color-scheme: dark;
  --bg: #0d1117;
  --bg-strong: #101722;
  --surface: #151c27;
  --surface-soft: #111923;
  --surface-raised: rgba(21, 28, 39, 0.92);
  --text: #edf3f8;
  --muted: #9aa8b7;
  --line: #293545;
  --line-strong: #3b4b5f;
  --accent: #2dd4bf;
  --accent-dark: #5eead4;
  --accent-soft: rgba(45, 212, 191, 0.12);
  --accent-ring: rgba(45, 212, 191, 0.2);
  --danger: #f97066;
  --danger-soft: rgba(240, 68, 56, 0.16);
  --success: #47cd89;
  --success-soft: rgba(71, 205, 137, 0.14);
  --info: #84caff;
  --info-soft: rgba(46, 144, 250, 0.16);
  --shadow: 0 26px 80px rgba(0, 0, 0, 0.38);
  --shadow-soft: 0 14px 38px rgba(0, 0, 0, 0.24);
  --disabled-bg: #202b38;
  --disabled-text: #6f7f90;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, var(--accent-ring), transparent 34rem),
    linear-gradient(180deg, var(--bg-strong) 0%, var(--bg) 46%);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  transition: background-color 180ms ease, color 180ms ease;
}

button,
input,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--accent-ring);
  outline-offset: 2px;
}

button:disabled,
a.disabled {
  cursor: not-allowed;
}

.app-shell {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
  padding: 34px 0 44px;
}

.hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0 32px;
}

.hero-content {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.brand-logo {
  flex: 0 0 auto;
  width: clamp(56px, 8vw, 78px);
  height: clamp(56px, 8vw, 78px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  object-fit: cover;
  box-shadow: var(--shadow-soft);
}

.brand-text {
  display: grid;
  gap: 4px;
}

.brand-title-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(2.5rem, 6vw, 5.3rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.version-pill {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-raised);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 850;
}

.hero-copy {
  max-width: 690px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.theme-toggle,
.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-raised);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 760;
  box-shadow: var(--shadow-soft);
}

.theme-toggle {
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.privacy-badge {
  cursor: default;
}

.privacy-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 5px var(--success-soft);
}

.workspace {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface-raised);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.tabs {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-soft), transparent 8%);
}

.tab-button {
  flex: 0 1 190px;
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: 14px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 820;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.tab-button:hover {
  border-color: var(--line);
  color: var(--text);
}

.tab-button.active {
  background: var(--text);
  color: var(--bg-strong);
  box-shadow: var(--shadow-soft);
}

.tool-panel {
  display: none;
  padding: 34px;
}

.tool-panel.active {
  display: block;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.panel-header h2 {
  margin-bottom: 7px;
  font-size: clamp(1.45rem, 3vw, 2.05rem);
  letter-spacing: 0;
}

.panel-header p,
.card-note {
  margin-bottom: 0;
  color: var(--muted);
}

.tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 430px);
  gap: 26px;
  align-items: start;
}

.tool-column {
  display: grid;
  gap: 20px;
}

.upload-zone {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 240px;
  padding: 30px;
  overflow: hidden;
  border: 2px dashed var(--line-strong);
  border-radius: 22px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-soft), transparent 10%), var(--surface-soft));
  color: var(--text);
  cursor: pointer;
  text-align: center;
  transition: border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.compact-upload {
  min-height: 150px;
  padding: 22px;
  border-radius: 18px;
}

.upload-zone::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid transparent;
  border-radius: 16px;
  pointer-events: none;
  transition: border-color 160ms ease;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 18px 38px var(--accent-ring);
  transform: translateY(-2px);
}

.upload-zone.drag-over::after {
  border-color: var(--accent);
}

.upload-zone.drag-over .drop-hint {
  opacity: 1;
  transform: translateY(0);
}

.upload-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.upload-copy {
  display: grid;
  gap: 2px;
}

.upload-zone strong {
  margin-top: 12px;
  font-size: 1.1rem;
}

.upload-zone small {
  color: var(--muted);
}

.drop-hint {
  position: absolute;
  right: 18px;
  bottom: 16px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--bg-strong);
  font-size: 0.78rem;
  font-weight: 850;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.upload-icon {
  display: inline-grid;
  place-items: center;
  width: 62px;
  height: 62px;
  border-radius: 20px;
  background: var(--surface);
  color: var(--accent);
  font-size: 1.55rem;
  font-weight: 950;
  box-shadow: var(--shadow-soft);
}

.pdf-icon {
  font-size: 1rem;
}

.message {
  display: none;
  min-height: 46px;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-radius: 14px;
  font-size: 0.93rem;
  font-weight: 760;
}

.message.visible {
  display: flex;
  align-items: center;
}

.message.info {
  border-color: color-mix(in srgb, var(--info), transparent 72%);
  background: var(--info-soft);
  color: var(--info);
}

.message.error {
  border-color: color-mix(in srgb, var(--danger), transparent 70%);
  background: var(--danger-soft);
  color: var(--danger);
}

.message.success {
  border-color: color-mix(in srgb, var(--success), transparent 70%);
  background: var(--success-soft);
  color: var(--success);
}

.processing-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 12px 14px;
  border: 1px solid color-mix(in srgb, var(--info), transparent 72%);
  border-radius: 14px;
  background: var(--info-soft);
  color: var(--info);
  font-size: 0.93rem;
  font-weight: 800;
}

.processing-indicator[hidden] {
  display: none;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 3px solid color-mix(in srgb, var(--info), transparent 72%);
  border-top-color: var(--info);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}

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

.preview-card,
.info-card,
.settings-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.preview-card {
  padding: 14px;
}

.preview-frame {
  display: grid;
  place-items: center;
  min-height: 350px;
  overflow: hidden;
  border-radius: 10px;
  background-color: color-mix(in srgb, var(--surface-soft), var(--surface) 35%);
  background-image:
    linear-gradient(45deg, color-mix(in srgb, var(--line), transparent 45%) 25%, transparent 25%),
    linear-gradient(-45deg, color-mix(in srgb, var(--line), transparent 45%) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, color-mix(in srgb, var(--line), transparent 45%) 75%),
    linear-gradient(-45deg, transparent 75%, color-mix(in srgb, var(--line), transparent 45%) 75%);
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-size: 20px 20px;
}

.preview-frame img {
  display: none;
  max-width: 100%;
  max-height: 440px;
  object-fit: contain;
}

.preview-frame.has-image img {
  display: block;
}

.preview-frame.has-image p {
  display: none;
}

.preview-frame p {
  max-width: 360px;
  padding: 0 20px;
  color: var(--muted);
  font-weight: 650;
  text-align: center;
}

.info-card,
.settings-card {
  padding: 22px;
}

.info-card h3,
.settings-card h3 {
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.file-details {
  display: grid;
  gap: 0;
  margin: 0;
}

.file-details div {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line), transparent 35%);
}

.file-details div:first-child {
  padding-top: 0;
}

.file-details div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.file-details dt {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 850;
}

.file-details dd {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
  font-weight: 760;
}

.settings-card {
  display: grid;
  gap: 16px;
}

.input-row {
  display: grid;
  gap: 7px;
}

.input-row label,
.checkbox-row {
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 800;
}

.input-row input,
.input-row select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--bg-strong);
  color: var(--text);
  padding: 10px 12px;
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.input-row input:focus,
.input-row select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-ring);
}

.input-row input[type="range"] {
  min-height: auto;
  padding: 0;
  accent-color: var(--accent);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkbox-row input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.button-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 6px;
}

.primary-button,
.secondary-button,
.future-button,
.action-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 850;
  text-align: center;
  text-decoration: none;
  transition: border-color 150ms ease, background-color 150ms ease, color 150ms ease, transform 150ms ease, opacity 150ms ease;
}

.primary-button {
  border: 0;
  background: linear-gradient(135deg, var(--accent), #2563eb);
  color: #ffffff;
  box-shadow: 0 12px 24px var(--accent-ring);
}

.primary-button:hover:not(:disabled) {
  transform: translateY(-1px);
  filter: saturate(1.08);
}

.primary-button:disabled {
  background: var(--disabled-bg);
  color: var(--disabled-text);
  box-shadow: none;
  opacity: 1;
}

.secondary-button,
.future-button,
.action-button {
  border: 1px solid var(--line);
  background: var(--bg-strong);
  color: var(--text);
}

.secondary-button:hover:not(.disabled):not(:disabled),
.future-button:hover:not(:disabled),
.action-button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.secondary-button.disabled,
.secondary-button:disabled,
.future-button:disabled,
.action-button:disabled {
  border-color: color-mix(in srgb, var(--line), transparent 20%);
  background: var(--disabled-bg);
  color: var(--disabled-text);
  opacity: 1;
  pointer-events: none;
}

.future-grid,
.pdf-button-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.pdf-button-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.future-button {
  min-height: 56px;
  padding: 9px 10px;
}

.product-info {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.product-section {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-raised);
  padding: 22px;
  box-shadow: var(--shadow-soft);
}

.product-section h2 {
  margin-bottom: 10px;
  font-size: 1.2rem;
  letter-spacing: 0;
}

.product-section p {
  color: var(--muted);
}

.product-section p:last-child {
  margin-bottom: 0;
}

.section-kicker {
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 850;
  text-transform: uppercase;
}

.faq-list {
  display: grid;
  gap: 8px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-strong);
  padding: 12px;
}

.faq-list summary {
  color: var(--text);
  cursor: pointer;
  font-weight: 800;
}

.faq-list p {
  margin: 10px 0 0;
  font-size: 0.94rem;
}

.site-footer {
  display: flex;
  justify-content: center;
  margin-top: 24px;
  padding: 18px 0 6px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
  text-align: center;
}

@media (max-width: 920px) {
  .app-shell {
    width: min(100% - 24px, 780px);
    padding: 22px 0 32px;
  }

  .hero {
    display: grid;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .tool-panel {
    padding: 24px;
  }

  .tool-grid {
    grid-template-columns: 1fr;
  }

  .product-info {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .app-shell {
    width: min(100% - 16px, 520px);
    padding-top: 16px;
  }

  .hero-content {
    display: grid;
    gap: 12px;
  }

  .brand-logo {
    width: 54px;
    height: 54px;
    border-radius: 16px;
  }

  .hero-actions,
  .tabs,
  .button-row,
  .future-grid,
  .pdf-button-grid {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 18px;
    padding-bottom: 24px;
  }

  h1 {
    font-size: clamp(2.35rem, 14vw, 3.8rem);
  }

  .hero-copy {
    font-size: 1rem;
  }

  .theme-toggle,
  .privacy-badge {
    justify-content: center;
    width: 100%;
  }

  .workspace {
    border-radius: 20px;
  }

  .tab-button {
    flex-basis: auto;
    width: 100%;
  }

  .tool-panel {
    padding: 14px;
  }

  .panel-header {
    margin-bottom: 18px;
  }

  .upload-zone {
    min-height: 188px;
    padding: 20px 14px;
    border-radius: 18px;
  }

  .preview-frame {
    min-height: 240px;
  }

  .info-card,
  .settings-card {
    padding: 16px;
  }

  .file-details div {
    grid-template-columns: 1fr;
    gap: 3px;
  }
}