:root {
  --bg: #f6fff8;
  --drafting-paper: #ecfdf3;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-2: #f7fff9;
  --text: #0f2e1d;
  --muted: #587866;
  --border: rgba(22, 163, 74, 0.2);
  --grid-line: rgba(22, 163, 74, 0.12);
  --grid-line-strong: rgba(22, 163, 74, 0.2);
  --accent-a: #16a34a;
  --accent-b: #22c55e;
  --accent: #15803d;
  --accent-deep: #14532d;
  --page-bg: #ffffff;
  --split: 50%;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  position: relative;
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, rgba(34, 197, 94, 0.24), transparent 24rem),
    radial-gradient(circle at 88% 4%, rgba(21, 128, 61, 0.16), transparent 26rem),
    linear-gradient(rgba(22, 163, 74, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 163, 74, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(22, 163, 74, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 163, 74, 0.14) 1px, transparent 1px),
    var(--bg);
  background-size: auto, auto, 24px 24px, 24px 24px, 120px 120px, 120px 120px, auto;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, transparent 0 48%, rgba(22, 163, 74, 0.12) 48% 49%, transparent 49% 100%),
    linear-gradient(45deg, transparent 0 72%, rgba(22, 163, 74, 0.08) 72% 73%, transparent 73% 100%);
  background-size: 380px 380px, 520px 520px;
  opacity: 0.85;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

.app-header {
  position: relative;
  z-index: 1;
  width: min(1500px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 2rem 0 1rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0;
  padding: 0.85rem 1.1rem;
  border: 1px solid rgba(22, 163, 74, 0.24);
  border-radius: 999px;
  color: var(--accent-deep);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 14px 40px rgba(22, 163, 74, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  backdrop-filter: blur(18px);
}

.eyebrow::before {
  content: "";
  width: 0.85rem;
  height: 0.85rem;
  border: 2px solid var(--accent-a);
  border-radius: 0.18rem;
  transform: rotate(45deg);
  box-shadow: 0 0 0 5px rgba(34, 197, 94, 0.12);
}

h1 {
  margin: 0;
  max-width: 850px;
  font-size: clamp(2rem, 5vw, 4.25rem);
  line-height: 0.95;
}

.subtitle {
  max-width: 760px;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1500px, calc(100vw - 2rem));
  margin: 0 auto 3rem;
}

.case-panel,
.upload-panel,
.controls {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 1.4rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(235, 255, 241, 0.76)),
    var(--panel);
  box-shadow: 0 18px 60px rgba(20, 83, 45, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.upload-panel,
.controls {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 1rem;
  align-items: stretch;
}

.case-panel {
  display: grid;
  gap: 1.15rem;
  margin-bottom: 1rem;
  padding: clamp(1.1rem, 2.5vw, 1.6rem);
}

.case-panel-header {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.section-kicker {
  margin: 0 0 0.25rem;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.case-panel h2 {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.5rem, 4vw, 2.6rem);
  line-height: 1;
}

.secondary-button {
  min-height: 44px;
  padding: 0 1rem;
  border: 1px solid rgba(22, 163, 74, 0.24);
  color: var(--accent-deep);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 10px 24px rgba(20, 83, 45, 0.1);
}

.case-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  min-height: 72px;
  align-items: center;
  padding: 0.75rem;
  border: 1px solid rgba(22, 163, 74, 0.14);
  border-radius: 1rem;
  color: var(--muted);
  background:
    linear-gradient(rgba(22, 163, 74, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 163, 74, 0.05) 1px, transparent 1px),
    rgba(255, 255, 255, 0.62);
  background-size: 18px 18px, 18px 18px, auto;
}

.case-list.loading,
.case-list.empty,
.case-list.error {
  font-weight: 800;
}

.case-list.error {
  border-color: rgba(220, 38, 38, 0.28);
  color: #b91c1c;
  background: rgba(255, 241, 242, 0.78);
}

.case-button {
  display: inline-grid;
  grid-template-columns: auto auto;
  gap: 0.6rem;
  align-items: center;
  min-height: 54px;
  min-width: 0;
  padding: 0.45rem 0.55rem 0.45rem 1rem;
  border: 1px solid rgba(22, 163, 74, 0.2);
  border-radius: 1rem;
  color: var(--accent-deep);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 8px 20px rgba(20, 83, 45, 0.1);
}

.case-button:not(:disabled):hover,
.case-button.active {
  border-color: rgba(22, 163, 74, 0.54);
  color: #ffffff;
  background: linear-gradient(135deg, #14532d, #16a34a);
}

.case-id {
  font-size: 1.15rem;
  font-weight: 950;
}

.case-file {
  padding: 0.32rem 0.55rem;
  border-radius: 999px;
  color: var(--muted);
  background: rgba(22, 163, 74, 0.1);
  font-size: 0.82rem;
  font-weight: 900;
}

.case-button:hover .case-file,
.case-button.active .case-file {
  color: #14532d;
  background: rgba(255, 255, 255, 0.86);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.settings-sidebar {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 20;
}

.settings-drawer {
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 14px 40px rgba(20, 83, 45, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  overflow: hidden;
  backdrop-filter: blur(16px);
}

.settings-drawer summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  color: var(--accent-deep);
  font-weight: 950;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  user-select: none;
}

.settings-drawer summary::-webkit-details-marker {
  display: none;
}

.settings-drawer summary::after {
  content: "+";
  display: inline-grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 999px;
  color: #ffffff;
  background: var(--accent-a);
}

.settings-drawer[open] {
  width: min(320px, calc(100vw - 2rem));
}

.settings-drawer[open] summary {
  border-bottom: 1px solid rgba(22, 163, 74, 0.14);
}

.settings-drawer[open] summary::after {
  content: "−";
}

.settings-sidebar .upload-panel,
.settings-sidebar .controls {
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-top: 0;
  padding: 0.75rem;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.settings-sidebar .controls {
  padding-top: 0;
}

.settings-sidebar .control-group,
.settings-sidebar .control-group.compact {
  grid-template-columns: 1fr;
}

.settings-sidebar button:not(.case-button) {
  min-height: 48px;
}

.settings-sidebar .status {
  margin: 0 0.75rem 0.75rem;
  font-size: 0.9rem;
}

.upload-card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.15rem 0.8rem;
  align-items: center;
  min-height: 92px;
  padding: 1rem;
  border: 1px dashed rgba(22, 163, 74, 0.36);
  border-radius: 1rem;
  color: var(--text);
  background:
    linear-gradient(rgba(22, 163, 74, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 163, 74, 0.05) 1px, transparent 1px),
    rgba(255, 255, 255, 0.7);
  background-size: 18px 18px, 18px 18px, auto;
  cursor: pointer;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.upload-card:hover,
.upload-card:focus-within {
  border-color: rgba(22, 163, 74, 0.72);
  background:
    linear-gradient(rgba(22, 163, 74, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 163, 74, 0.07) 1px, transparent 1px),
    #ffffff;
  background-size: 18px 18px, 18px 18px, auto;
  box-shadow: 0 14px 34px rgba(22, 163, 74, 0.14);
  transform: translateY(-2px);
}

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

.badge {
  grid-row: span 2;
  display: inline-grid;
  place-items: center;
  min-width: 64px;
  height: 44px;
  padding: 0 0.75rem;
  border-radius: 999px;
  color: #ffffff;
  font-weight: 900;
  white-space: nowrap;
  box-shadow: 0 8px 18px rgba(22, 163, 74, 0.22);
}

.badge-a {
  background: linear-gradient(135deg, #14532d, var(--accent-a));
}

.badge-b {
  background: linear-gradient(135deg, var(--accent), var(--accent-b));
}

.upload-title {
  font-weight: 900;
}

.upload-name {
  min-width: 0;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

button,
select,
input[type="range"] {
  font: inherit;
}

button {
  border: 0;
  border-radius: 1rem;
  padding: 0 1.5rem;
  color: #ffffff;
  background: linear-gradient(135deg, #14532d, #16a34a 48%, #86efac);
  box-shadow: 0 14px 28px rgba(22, 163, 74, 0.24);
  font-weight: 900;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, filter 160ms ease;
}

button:not(:disabled):hover {
  box-shadow: 0 18px 36px rgba(22, 163, 74, 0.3);
  filter: saturate(1.08);
  transform: translateY(-1px);
}

button:disabled {
  color: #739681;
  background: #dff3e6;
  box-shadow: none;
  cursor: not-allowed;
}

.controls {
  grid-template-columns: minmax(260px, 1fr) auto;
  margin-top: 1rem;
}

.control-group {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(22, 163, 74, 0.12);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.68);
}

.control-group label {
  color: var(--accent-deep);
  font-weight: 800;
}

.control-group.compact {
  grid-template-columns: auto auto;
}

input[type="range"] {
  accent-color: var(--accent-a);
}

select {
  border: 1px solid rgba(22, 163, 74, 0.28);
  border-radius: 0.7rem;
  padding: 0.45rem 0.65rem;
  color: var(--text);
  background: var(--panel-2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.status {
  min-height: 2.8rem;
  margin: 1rem 0;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(22, 163, 74, 0.22);
  border-radius: 1rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 10px 30px rgba(20, 83, 45, 0.08);
  backdrop-filter: blur(14px);
}

.status.error {
  border-color: rgba(220, 38, 38, 0.38);
  color: #b91c1c;
  background: rgba(255, 241, 242, 0.86);
}

.viewer {
  --split: 50%;
  display: grid;
  gap: 1.5rem;
  align-items: start;
  min-width: 0;
  min-height: 420px;
  padding: 1rem;
  border: 1px solid rgba(22, 163, 74, 0.22);
  border-radius: 1.5rem;
  background:
    linear-gradient(rgba(22, 163, 74, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 163, 74, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(22, 163, 74, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 163, 74, 0.14) 1px, transparent 1px),
    rgba(235, 255, 241, 0.82);
  background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px, auto;
  box-shadow: 0 24px 70px rgba(20, 83, 45, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.88);
  overflow: auto;
}

.viewer.empty {
  place-items: center;
}

.empty-state {
  max-width: 500px;
  padding: 2rem;
  border: 1px solid rgba(22, 163, 74, 0.18);
  border-radius: 1.4rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 18px 50px rgba(20, 83, 45, 0.12);
  text-align: center;
  backdrop-filter: blur(14px);
}

.empty-state h2 {
  margin: 0.5rem 0;
  color: var(--text);
}

.empty-icon {
  display: inline-grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 1.25rem;
  color: white;
  background: linear-gradient(135deg, #14532d, #22c55e);
  box-shadow: 0 16px 34px rgba(22, 163, 74, 0.26);
  font-size: 2.5rem;
}

.page-row {
  display: grid;
  width: 100%;
  gap: 0.65rem;
  justify-items: stretch;
}

.page-label {
  display: inline-flex;
  justify-self: center;
  gap: 0.5rem;
  align-items: center;
  padding: 0.4rem 0.7rem;
  border: 1px solid rgba(22, 163, 74, 0.2);
  border-radius: 999px;
  color: var(--accent-deep);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 8px 20px rgba(20, 83, 45, 0.1);
  font-size: 0.88rem;
  font-weight: 900;
}

.page-comparison {
  position: relative;
  justify-self: safe center;
  width: var(--page-width);
  height: var(--page-height);
  margin-inline: auto;
  max-width: none;
  border: 1px solid rgba(20, 83, 45, 0.22);
  border-radius: 0.55rem;
  background:
    linear-gradient(rgba(22, 163, 74, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 163, 74, 0.06) 1px, transparent 1px),
    #f8fff9;
  background-size: 16px 16px, 16px 16px, auto;
  box-shadow: 0 18px 40px rgba(20, 83, 45, 0.2);
  overflow: hidden;
  touch-action: none;
  user-select: none;
}

.pdf-layer {
  position: absolute;
  inset: 0;
}

.pdf-layer canvas {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  background: var(--page-bg);
}

.layer-b {
  clip-path: inset(0 0 0 var(--split));
}

.divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--split);
  z-index: 4;
  width: 3px;
  background: linear-gradient(to bottom, #991b1b, #ef4444, #fca5a5);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.84), 0 0 26px rgba(239, 68, 68, 0.62);
  transform: translateX(-50%);
  pointer-events: none;
}

.handle {
  position: absolute;
  top: 50%;
  left: var(--split);
  z-index: 5;
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border: 3px solid rgba(255, 255, 255, 0.95);
  border-radius: 999px;
  color: white;
  background: linear-gradient(135deg, #991b1b, #ef4444);
  box-shadow: 0 12px 30px rgba(239, 68, 68, 0.34);
  transform: translate(-50%, -50%);
  cursor: ew-resize;
}

.handle::before {
  content: "↔";
  font-size: 1.45rem;
  line-height: 1;
}

.side-label {
  position: absolute;
  top: 0.75rem;
  z-index: 3;
  padding: 0.35rem 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 999px;
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(20, 83, 45, 0.18);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  pointer-events: none;
}

.side-label.a {
  left: 0.75rem;
  background: linear-gradient(135deg, #14532d, var(--accent-a));
}

.side-label.b {
  right: 0.75rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-b));
}

.placeholder-page {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  padding: 2rem;
  color: var(--accent-deep);
  background:
    linear-gradient(rgba(22, 163, 74, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 163, 74, 0.06) 1px, transparent 1px),
    #f8fff9;
  background-size: 18px 18px, 18px 18px, auto;
  font-weight: 900;
  text-align: center;
}

@media (max-width: 850px) {
  .workspace,
  .upload-panel,
  .controls {
    grid-template-columns: 1fr;
  }

  .settings-sidebar {
    position: fixed;
    top: 0.75rem;
    right: 0.75rem;
  }

  .case-panel-header {
    align-items: stretch;
    flex-direction: column;
  }

  button {
    min-height: 56px;
  }

  .case-button {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .control-group,
  .control-group.compact {
    grid-template-columns: 1fr;
  }
}