/* ============================================================
   main.css — Design system, reset, layout shell, shared components
   All CSS variables live here. No view-specific styles here.
   ============================================================ */

/* ── CSS Variables (Light Theme) ── */
:root {
  /* Colors */
  --color-bg:           #f5f6fa;
  --color-surface:      #ffffff;
  --color-surface-2:    #f0f2f8;
  --color-border:       #e2e6f0;
  --color-border-light: #eef0f7;

  --color-text-primary:   #1a1d2e;
  --color-text-secondary: #6b7280;
  --color-text-muted:     #9ca3af;

  --color-accent:       #6366f1;
  --color-accent-light: #ede9fe;
  --color-accent-dark:  #4f46e5;

  /* Status colors */
  --color-income:   #16a34a;
  --color-income-bg:#dcfce7;
  --color-expense:  #dc2626;
  --color-expense-bg:#fee2e2;
  --color-borrow:   #d97706;
  --color-borrow-bg:#fef3c7;
  --color-lend:     #0891b2;
  --color-lend-bg:  #cffafe;
  --color-repay:    #7c3aed;
  --color-repay-bg: #ede9fe;
  --color-transfer: #64748b;
  --color-transfer-bg:#f1f5f9;

  /* Currency badges */
  --color-inr:    #f97316;
  --color-inr-bg: #fff7ed;
  --color-eur:    #3b82f6;
  --color-eur-bg: #eff6ff;

  /* Highlight (uncertain fields) */
  --color-warn:    #d97706;
  --color-warn-bg: #fffbeb;
  --color-warn-border: #fbbf24;

  /* Sidebar */
  --sidebar-width: 220px;
  --sidebar-bg:    #1a1d2e;
  --sidebar-text:  #c4c8d8;
  --sidebar-active:#6366f1;
  --sidebar-active-bg: rgba(99,102,241,0.15);
  --sidebar-hover-bg:  rgba(255,255,255,0.06);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;

  --text-xs:   11px;
  --text-sm:   13px;
  --text-base: 14px;
  --text-md:   16px;
  --text-lg:   18px;
  --text-xl:   22px;
  --text-2xl:  28px;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 999px;

  /* Shadow */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.10);

  /* Transitions */
  --transition: 150ms ease;
}

/* ── Dark Theme ── */
[data-theme="dark"] {
  --color-bg:           #0f1117;
  --color-surface:      #1a1d2e;
  --color-surface-2:    #222639;
  --color-border:       #2e3347;
  --color-border-light: #252840;

  --color-text-primary:   #e8eaf6;
  --color-text-secondary: #8b90a8;
  --color-text-muted:     #5a607a;

  --color-accent-light: rgba(99,102,241,0.15);

  --color-income-bg: rgba(22,163,74,0.15);
  --color-expense-bg:rgba(220,38,38,0.15);
  --color-borrow-bg: rgba(217,119,6,0.15);
  --color-lend-bg:   rgba(8,145,178,0.15);
  --color-repay-bg:  rgba(124,58,237,0.15);
  --color-transfer-bg:rgba(100,116,139,0.15);

  --color-inr-bg: rgba(249,115,22,0.12);
  --color-eur-bg: rgba(59,130,246,0.12);

  --color-warn-bg:     rgba(217,119,6,0.15);
  --color-warn-border: #d97706;

  --sidebar-bg:  #0f1117;
  --sidebar-text:#7a80a0;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  background: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  height: 100vh;
}
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; }
a { text-decoration: none; color: inherit; }

/* ── App Layout ── */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 10;
}

.sidebar__logo {
  padding: var(--space-5) var(--space-4);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar__logo-title {
  font-size: var(--text-md);
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.3px;
}

.sidebar__logo-sub {
  font-size: var(--text-xs);
  color: var(--sidebar-text);
  margin-top: 2px;
}

.sidebar__nav {
  flex: 1;
  padding: var(--space-3) 0;
  overflow-y: auto;
}

.sidebar__nav-section {
  padding: var(--space-4) var(--space-4) var(--space-2);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
}

.sidebar__nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 9px var(--space-4);
  font-size: var(--text-sm);
  color: var(--sidebar-text);
  border-radius: 0;
  transition: background var(--transition), color var(--transition);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.sidebar__nav-item:hover {
  background: var(--sidebar-hover-bg);
  color: #ffffff;
}

.sidebar__nav-item.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active);
  font-weight: 600;
}

.sidebar__nav-item .nav-icon { font-size: 16px; width: 20px; text-align: center; }

.sidebar__footer {
  padding: var(--space-4);
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex-shrink: 0; /* prevent footer from being clipped by nav overflow */
}

.sidebar__footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar__theme-btn {
  background: none;
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--sidebar-text);
  border-radius: var(--radius-sm);
  padding: 5px 9px;
  font-size: var(--text-xs);
  transition: var(--transition);
}

.sidebar__theme-btn:hover { border-color: rgba(255,255,255,0.3); color: #fff; }

/* Drive sync button */
.sidebar__drive-btn {
  width: 100%;
  background: none;
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--sidebar-text);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  font-size: var(--text-xs);
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
}

.sidebar__drive-btn:hover {
  border-color: rgba(255,255,255,0.3);
  color: #fff;
}

.sidebar__drive-btn[data-status="ok"] {
  border-color: rgba(22,163,74,0.5);
  color: #86efac;
}

.sidebar__drive-btn[data-status="syncing"] {
  border-color: rgba(99,102,241,0.5);
  color: #a5b4fc;
}

.sidebar__drive-btn[data-status="error"] {
  border-color: rgba(220,38,38,0.5);
  color: #fca5a5;
}

/* ── Main Content ── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.topbar {
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
}

.topbar__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.view-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
}

/* ── Shared: Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px var(--space-4);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  border: none;
  transition: var(--transition);
  cursor: pointer;
  line-height: 1;
}

.btn--primary {
  background: var(--color-accent);
  color: #ffffff;
}
.btn--primary:hover { background: var(--color-accent-dark); }

.btn--secondary {
  background: var(--color-surface-2);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}
.btn--secondary:hover { background: var(--color-border); }

.btn--ghost {
  background: none;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn--ghost:hover { color: var(--color-text-primary); background: var(--color-surface-2); }

.btn--danger {
  background: var(--color-expense-bg);
  color: var(--color-expense);
  border: 1px solid rgba(220,38,38,0.2);
}
.btn--danger:hover { background: var(--color-expense); color: #fff; }

.btn--sm { padding: 5px 10px; font-size: var(--text-xs); }
.btn--icon { padding: 7px; border-radius: var(--radius-sm); }

/* ── Shared: Cards ── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}

/* ── Shared: Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: 1.6;
}

.badge--inr  { background: var(--color-inr-bg);  color: var(--color-inr); }
.badge--eur  { background: var(--color-eur-bg);  color: var(--color-eur); }
.badge--expense  { background: var(--color-expense-bg);  color: var(--color-expense); }
.badge--income   { background: var(--color-income-bg);   color: var(--color-income); }
.badge--borrow   { background: var(--color-borrow-bg);   color: var(--color-borrow); }
.badge--lend     { background: var(--color-lend-bg);     color: var(--color-lend); }
.badge--repay    { background: var(--color-repay-bg);    color: var(--color-repay); }
.badge--transfer { background: var(--color-transfer-bg); color: var(--color-transfer); }

/* ── Shared: Form elements ── */
.form-group { display: flex; flex-direction: column; gap: var(--space-1); }
.form-label { font-size: var(--text-xs); font-weight: 600; color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }

.form-input, .form-select, .form-textarea {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  width: 100%;
  transition: border-color var(--transition);
  outline: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}

/* Uncertain/flagged field */
.form-input--warn, .form-select--warn {
  border-color: var(--color-warn-border);
  background: var(--color-warn-bg);
}

.form-input--warn:focus, .form-select--warn:focus {
  border-color: var(--color-warn);
  box-shadow: 0 0 0 3px rgba(217,119,6,0.15);
}

.field-warn-label {
  font-size: var(--text-xs);
  color: var(--color-warn);
  display: flex;
  align-items: center;
  gap: 3px;
}

/* ── Shared: Empty state ── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  color: var(--color-text-muted);
  text-align: center;
  gap: var(--space-3);
}

.empty-state__icon { font-size: 40px; opacity: 0.4; }
.empty-state__title { font-size: var(--text-md); font-weight: 600; color: var(--color-text-secondary); }
.empty-state__desc { font-size: var(--text-sm); max-width: 280px; line-height: 1.6; }

/* ── Shared: Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
  max-height: 90vh;
  overflow-y: auto;
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.modal__title { font-size: var(--text-md); font-weight: 700; }

.modal__close {
  background: none;
  border: none;
  font-size: 18px;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
}

.modal__close:hover { color: var(--color-text-primary); background: var(--color-surface-2); }

.modal__footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* ── Shared: Stats row ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  box-shadow: var(--shadow-sm);
}

.stat-card__label { font-size: var(--text-xs); color: var(--color-text-secondary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.stat-card__value { font-size: var(--text-xl); font-weight: 700; margin-top: var(--space-1); }
.stat-card__sub { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: 2px; }
.stat-card__value--income { color: var(--color-income); }
.stat-card__value--expense { color: var(--color-expense); }
.stat-card__value--accent { color: var(--color-accent); }

/* ── Shared: Search bar ── */
.search-bar {
  position: relative;
  display: flex;
  align-items: center;
}

.search-bar__icon {
  position: absolute;
  left: 10px;
  font-size: 14px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-bar__input {
  padding-left: 32px;
  padding-right: var(--space-3);
}

/* ── Shared: Section header ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.section-header__title {
  font-size: var(--text-md);
  font-weight: 700;
}

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

/* ── Utility ── */
.hidden { display: none !important; }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.font-mono { font-family: var(--font-mono); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }