@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

/* ─── Tokens ─── */
:root {
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;

  --slate-50:  #f8f9fb;
  --slate-100: #eef0f4;
  --slate-200: #dce1e8;
  --slate-300: #b8c1cf;
  --slate-400: #8d99ad;
  --slate-500: #64708a;
  --slate-600: #4a5468;
  --slate-700: #363e4f;
  --slate-800: #252b38;
  --slate-900: #171b24;

  --accent:     #3772ff;
  --accent-soft: #3772ff18;
  --accent-mid:  #3772ff30;
  --green:      #22c55e;
  --green-soft: #22c55e18;
  --red:        #ef4444;
  --red-soft:   #ef444418;
  --amber:      #f59e0b;
  --amber-soft: #f59e0b18;

  --bg:         var(--slate-50);
  --bg-card:    #ffffff;
  --bg-sidebar: var(--slate-900);
  --border:     var(--slate-200);
  --text:       var(--slate-800);
  --text-muted: var(--slate-500);
  --text-inv:   var(--slate-100);

  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(23,27,36,.05);
  --shadow:    0 1px 3px rgba(23,27,36,.06), 0 4px 12px rgba(23,27,36,.04);
  --shadow-lg: 0 4px 6px rgba(23,27,36,.05), 0 12px 32px rgba(23,27,36,.08);
  --shadow-xl: 0 8px 16px rgba(23,27,36,.08), 0 24px 48px rgba(23,27,36,.12);

  --sidebar-w: 240px;
  --topbar-h:  60px;
  --transition: 0.2s cubic-bezier(.4,0,.2,1);
}

/* ─── Dark Mode ─── */
[data-theme="dark"] {
  --slate-50:  #0f1117;
  --slate-100: #181b24;
  --slate-200: #242837;
  --slate-300: #363d50;
  --slate-400: #5a6380;
  --slate-500: #8892a8;
  --slate-600: #a8b0c2;
  --slate-700: #c5cbd8;
  --slate-800: #dde1ea;
  --slate-900: #eef0f5;

  --bg:         #0b0d12;
  --bg-card:    #14171f;
  --bg-sidebar: #0b0d12;
  --border:     #242837;
  --text:       #dde1ea;
  --text-muted: #8892a8;
  --text-inv:   #c5cbd8;

  --accent-soft: #3772ff20;
  --accent-mid:  #3772ff35;
  --green-soft:  #22c55e20;
  --red-soft:    #ef444420;
  --amber-soft:  #f59e0b20;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.2);
  --shadow:    0 1px 3px rgba(0,0,0,.2), 0 4px 12px rgba(0,0,0,.15);
  --shadow-lg: 0 4px 6px rgba(0,0,0,.2), 0 12px 32px rgba(0,0,0,.25);
  --shadow-xl: 0 8px 16px rgba(0,0,0,.25), 0 24px 48px rgba(0,0,0,.35);
}

[data-theme="dark"] .topbar {
  background: rgba(11,13,18,.85);
}

[data-theme="dark"] .data-table thead {
  background: var(--slate-100);
}

[data-theme="dark"] .data-table tbody tr:nth-child(even) {
  background: rgba(24,27,36,.5);
}

[data-theme="dark"] .projection-table tbody tr:nth-child(even) td:first-child {
  background: rgba(24,27,36,.5);
}

[data-theme="dark"] .scenario-tab.active {
  background: var(--slate-200);
}

[data-theme="dark"] .scenario-tabs {
  background: var(--slate-100);
}

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

html { font-size: 15px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* ─── App Shell ─── */
.app {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ─── */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-sidebar);
  color: var(--text-inv);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--transition);
  overflow: hidden;
}

.sidebar::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(55,114,255,.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(55,114,255,.06) 0%, transparent 50%);
  pointer-events: none;
}

.sidebar-header {
  padding: 28px 24px 20px;
  position: relative;
}

.sidebar-header h1 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: #fff;
}

.nav-links {
  list-style: none;
  padding: 0 12px;
  flex: 1;
  position: relative;
}

.nav-links li { margin-bottom: 2px; }

.nav-link {
  display: block;
  padding: 10px 16px;
  color: var(--slate-400);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--slate-200);
  background: rgba(255,255,255,.06);
}

.nav-link.active {
  color: #fff;
  background: rgba(55,114,255,.2);
}

.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,.08);
}

.theme-toggle {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-sm);
  color: var(--slate-400);
  padding: 8px 14px;
  cursor: pointer;
  font-size: 1rem;
  width: 100%;
  transition: all var(--transition);
}

.theme-toggle:hover {
  background: rgba(255,255,255,.1);
  color: #fff;
}

/* ─── Content ─── */
.content {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ─── Topbar ─── */
.topbar {
  position: sticky;
  top: 0;
  height: var(--topbar-h);
  background: rgba(248,249,251,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 32px;
  z-index: 50;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--text);
  cursor: pointer;
  margin-right: auto;
  padding: 6px;
}

.year-selector {
  display: flex;
  align-items: center;
  gap: 10px;
}

.year-selector label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.year-selector select {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 6px 28px 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' stroke='%2364708a' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color var(--transition);
}

.year-selector select:hover { border-color: var(--slate-300); }
.year-selector select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* ─── Views ─── */
.view {
  padding: 28px 32px 48px;
  animation: viewIn 0.35s ease;
}

@keyframes viewIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.view.hidden { display: none; }
.hidden { display: none !important; }

.view > h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 400;
  margin-bottom: 24px;
  color: var(--slate-900);
}

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.view-header h2 { margin-bottom: 0; }

.view-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ─── KPI Grid ─── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.kpi-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}

.kpi-card:nth-child(1)::before { background: var(--accent); }
.kpi-card:nth-child(2)::before { background: var(--red); }
.kpi-card:nth-child(3)::before { background: var(--green); }
.kpi-card:nth-child(4)::before { background: var(--amber); }

.kpi-card .kpi-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.kpi-card .kpi-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--slate-900);
  line-height: 1.2;
}

.kpi-card .kpi-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ─── Charts ─── */
.charts-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 16px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
}

.chart-card h3 {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}

.chart-card canvas {
  max-height: 300px;
}

/* ─── Cards ─── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 20px;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  margin-bottom: 20px;
  color: var(--slate-900);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* ─── Data Tables ─── */
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 0.9rem;
}

.data-table thead {
  background: var(--slate-50);
}

.data-table th {
  padding: 12px 16px;
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--slate-100);
  color: var(--text);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:nth-child(even) {
  background: rgba(238,240,244,.35);
}

.data-table tbody tr {
  transition: background var(--transition);
}

.data-table tbody tr:hover {
  background: var(--accent-soft);
}

.data-table tfoot td {
  padding: 12px 16px;
  font-weight: 700;
  color: var(--slate-900);
  border-top: 2px solid var(--border);
  background: var(--slate-50);
}

/* ─── Buttons ─── */
.btn {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn:hover {
  background: var(--slate-100);
  border-color: var(--slate-300);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #2b5fd9;
  border-color: #2b5fd9;
  box-shadow: 0 2px 8px rgba(55,114,255,.3);
}

.btn-danger {
  color: var(--red);
  border-color: var(--red-soft);
  background: var(--red-soft);
}

.btn-danger:hover {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}

.btn-small {
  padding: 5px 10px;
  font-size: 0.78rem;
}

/* ─── Forms ─── */
.form-group {
  margin-bottom: 16px;
  flex: 1;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.form-group input,
.form-group select {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-group input::placeholder {
  color: var(--slate-300);
}

.input-readonly {
  background: var(--slate-100) !important;
  color: var(--text-muted) !important;
  cursor: not-allowed;
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ─── Modals ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(23,27,36,.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-xl);
  animation: modalIn 0.3s cubic-bezier(.4,0,.2,1);
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: 20px;
  color: var(--slate-900);
}

/* ─── Toast ─── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--slate-900);
  color: #fff;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 300;
  animation: toastIn 0.35s cubic-bezier(.4,0,.2,1);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.toast.toast-success { border-left: 4px solid var(--green); }
.toast.toast-error   { border-left: 4px solid var(--red); }

/* ─── Tax ─── */
.tax-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.tax-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tax-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
}

.tax-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  color: var(--slate-900);
}

.tax-card .tax-line {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 0.9rem;
}

.tax-card .tax-line.tax-total {
  font-weight: 700;
  padding-top: 10px;
  margin-top: 6px;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
}

.tax-card .tax-line .tax-label { color: var(--text-muted); }
.tax-card .tax-line .tax-amount { font-weight: 600; color: var(--text); font-variant-numeric: tabular-nums; }

.recommendation-banner {
  grid-column: 1 / -1;
  background: var(--accent-soft);
  border: 1px solid var(--accent-mid);
  border-radius: var(--radius);
  padding: 18px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.recommendation-banner .rec-icon {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.recommendation-banner .rec-text {
  font-size: 0.92rem;
  line-height: 1.5;
}

.recommendation-banner .rec-text strong {
  color: var(--accent);
}

/* ─── Mortgage Summary ─── */
.mortgage-summary {
  display: flex;
  gap: 24px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.mortgage-summary .summary-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mortgage-summary .summary-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.mortgage-summary .summary-value {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--slate-900);
}

/* ─── Badges ─── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-yes { background: var(--green-soft); color: #16a34a; }
.badge-no  { background: var(--red-soft); color: var(--red); }

.badge-category {
  background: var(--slate-100);
  color: var(--slate-600);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
}

/* ─── Projection Table ─── */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.projection-table {
  min-width: 1100px;
  font-size: 0.82rem;
}

.projection-table th,
.projection-table td {
  padding: 8px 12px;
  white-space: nowrap;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.projection-table th:first-child,
.projection-table td:first-child {
  text-align: left;
  position: sticky;
  left: 0;
  background: inherit;
  z-index: 1;
}

.projection-table tbody tr:nth-child(even) td:first-child {
  background: rgba(238,240,244,.35);
}

.projection-table tbody tr:hover td:first-child {
  background: var(--accent-soft);
}

.projection-table tr.loan-end {
  border-bottom: 3px solid var(--accent);
}

/* ─── Config Section Title ─── */
.form-section-title {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 24px 0 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ─── Resale Result Grid ─── */
.resale-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.resale-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.resale-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.resale-value {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--slate-900);
}

.resale-value.positive { color: var(--green); }
.resale-value.negative { color: var(--red); }

.resale-dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.resale-column-title {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* ─── Scenario Tabs ─── */
.scenario-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  background: var(--slate-100);
  border-radius: var(--radius-sm);
  padding: 3px;
  width: fit-content;
}

.scenario-tab {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 16px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.scenario-tab:hover {
  color: var(--text);
}

.scenario-tab.active {
  background: var(--bg-card);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--slate-300); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--slate-400); }

/* ─── Empty State ─── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state p {
  font-size: 0.95rem;
  margin-bottom: 16px;
}

/* ─── Responsive ─── */
@media (max-width: 860px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }

  .content {
    margin-left: 0;
  }

  .hamburger {
    display: block;
  }

  .view { padding: 20px 16px 40px; }
  .topbar { padding: 0 16px; }

  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
  .tax-grid { grid-template-columns: 1fr; }
  .resale-dual { grid-template-columns: 1fr; }

  .form-row { flex-direction: column; gap: 0; }

  .modal { margin: 16px; max-width: none; }
}

@media (max-width: 500px) {
  .kpi-grid { grid-template-columns: 1fr; }

  .view-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .view-header-actions {
    width: 100%;
  }

  .view-header-actions select { flex: 1; }

  .data-table { font-size: 0.82rem; }
  .data-table th, .data-table td { padding: 9px 10px; }
}