/* Apple-Swiss minimalistic — 8pt grid, Inter/system-ui */
*, *::before, *::after { box-sizing: border-box; }

:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --border: #e5e5ea;
  --text: #1d1d1f;
  --text-soft: #6e6e73;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --success: #34c759;
  --danger: #ff3b30;
  --radius: 8px;
  --radius-lg: 16px;
  --gap-1: 8px;
  --gap-2: 16px;
  --gap-3: 24px;
  --gap-4: 32px;
  --gap-5: 48px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --font: -apple-system, BlinkMacSystemFont, "Inter", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: var(--gap-3) var(--gap-2);
  display: flex;
  flex-direction: column;
  gap: var(--gap-2);
}
.sidebar__header .logo {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 var(--gap-2);
}
.sidebar__header .logo span {
  color: var(--text-soft);
  font-weight: 400;
}
.sidebar__actions .btn { width: 100%; }
.projects {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
  flex: 1;
  margin-top: var(--gap-2);
}
.project-item {
  padding: var(--gap-1) var(--gap-2);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  color: var(--text-soft);
  transition: background 0.15s, color 0.15s;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.project-item:hover { background: #f0f0f5; color: var(--text); }
.project-item.active { background: #eaf4ff; color: var(--accent); font-weight: 500; }
.sidebar__footer { color: var(--text-soft); font-size: 12px; text-align: center; }

/* Main */
.main {
  padding: var(--gap-4) var(--gap-5);
  max-width: 1100px;
  width: 100%;
}
.main__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--gap-4);
  flex-wrap: wrap;
  gap: var(--gap-2);
}
.main__header h2 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
}
.toolbar {
  display: flex;
  gap: var(--gap-1);
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
}
.btn:hover { background: #f0f0f5; }
.btn:active { transform: scale(0.98); }
.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn--primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn--danger {
  color: var(--danger);
  border-color: var(--border);
}
.btn--danger:hover { background: #fff0f0; }

/* Dropzone */
.dropzone {
  display: none;
  border: 2px dashed var(--accent);
  border-radius: var(--radius-lg);
  padding: var(--gap-4);
  text-align: center;
  background: #eaf4ff;
  color: var(--accent);
  margin-bottom: var(--gap-3);
}
.dropzone.visible { display: block; }
.dropzone.dragover { background: #d9ecff; }

/* Content sections */
.content {
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
}
.section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--gap-3);
  box-shadow: var(--shadow-sm);
}
.section h3 {
  margin: 0 0 var(--gap-2);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap-2);
}
.grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--text-soft);
  font-weight: 500;
}
.grid label.full { grid-column: 1 / -1; }
.grid input,
.grid select,
.grid textarea {
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
}
.grid input:focus,
.grid select:focus,
.grid textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,113,227,0.15);
}
.grid textarea { resize: vertical; }

/* Result card */
.result {
  background: linear-gradient(135deg, #1d1d1f 0%, #2c2c2e 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: var(--gap-4);
  box-shadow: var(--shadow-md);
}
.result h3 {
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 var(--gap-2);
}
.result__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--gap-2);
}
.result__cell {
  padding: var(--gap-2);
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius);
}
.result__cell .label {
  display: block;
  font-size: 12px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 6px;
}
.result__cell strong {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  display: block;
}
.result__cell--primary {
  background: var(--accent);
}
.result__cell--primary strong { font-size: 26px; }

.breakdown {
  margin-top: var(--gap-3);
  color: rgba(255,255,255,0.85);
}
.breakdown summary {
  cursor: pointer;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  padding: 6px 0;
}
.breakdown table {
  margin-top: var(--gap-1);
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.breakdown th, .breakdown td {
  text-align: left;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  font-weight: 400;
}
.breakdown th { color: rgba(255,255,255,0.6); }
.breakdown td { text-align: right; color: #fff; font-variant-numeric: tabular-nums; }

/* Responsive */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 240px;
  }
  .main { padding: var(--gap-3); }
}
@media (max-width: 600px) {
  .main__header h2 { font-size: 22px; }
  .main { padding: var(--gap-2); }
  .section { padding: var(--gap-2); }
  .result { padding: var(--gap-3); }
  .result__cell strong { font-size: 18px; }
  .result__cell--primary strong { font-size: 22px; }
}