/* =============================================================
   Gastos Personal — Cuaderno Financiero
   Sistema visual premium minimalista (papel · tinta · petróleo)
   ============================================================= */

/* ----- Tipografía Inter (con fallback) ----- */
@import url('https://rsms.me/inter/inter.css');

:root {
  /* Familia: prefiere Inter; cae a SF/Segoe; tabular numerals globales */
  --font:        "Inter", "Inter var", -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono:   "JetBrains Mono", "SF Mono", ui-monospace, "Cascadia Mono", "Roboto Mono", Consolas, monospace;

  /* ===== Superficies (papel) ===== */
  --canvas:      #f6f3ec;   /* papel cálido, ligeramente tintado */
  --surface:     #fbf9f3;   /* tarjeta */
  --surface-2:   #f0ece2;   /* surface "inset" / hover sutil */
  --surface-3:   #e7e2d4;   /* contraste mínimo */
  --overlay:     rgba(36, 32, 24, 0.42);

  /* ===== Tinta (texto) ===== */
  --ink:         #1a1d1f;
  --ink-soft:    #45494d;
  --ink-muted:   #7a7e83;
  --ink-quiet:   #aeb2b6;

  /* ===== Reglas (bordes) — tinta con opacidad para integrarse al papel ===== */
  --rule:           rgba(26, 29, 31, 0.085);
  --rule-strong:    rgba(26, 29, 31, 0.16);
  --rule-emphasis:  rgba(26, 29, 31, 0.30);

  /* ===== Acento (petróleo profundo) — un solo color con intención ===== */
  --accent:        #2a5566;
  --accent-hover:  #1f4253;
  --accent-tint:   rgba(42, 85, 102, 0.10);
  --accent-line:   rgba(42, 85, 102, 0.55);

  /* ===== Semánticos (verde bosque · ladrillo · ocre) ===== */
  --positive:       #4a7c5e;
  --positive-tint:  rgba(74, 124, 94, 0.12);
  --negative:       #a04a3c;
  --negative-tint:  rgba(160, 74, 60, 0.12);
  --warning:        #b08038;
  --warning-tint:   rgba(176, 128, 56, 0.14);
  --info:           var(--accent);
  --info-tint:      var(--accent-tint);

  /* ===== Sombras (mínimas; reservadas para overlays) ===== */
  --shadow-xs:  0 1px 0 rgba(26, 29, 31, 0.04);
  --shadow-sm:  0 1px 2px rgba(26, 29, 31, 0.05), 0 0 0 1px rgba(26, 29, 31, 0.04);
  --shadow:     0 8px 24px rgba(26, 29, 31, 0.10), 0 0 0 1px rgba(26, 29, 31, 0.05);
  --shadow-lg:  0 24px 56px rgba(26, 29, 31, 0.18), 0 0 0 1px rgba(26, 29, 31, 0.08);

  /* ===== Radio ===== */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 14px;
  --radius-xl: 18px;

  /* ===== Espacio (base 4) ===== */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 20px;
  --s-6: 24px;
  --s-7: 32px;
  --s-8: 40px;
  --s-9: 56px;

  /* ===== Layout ===== */
  --sidebar-w:  256px;
  --topbar-h:   64px;

  /* Compatibilidad con código existente */
  --bg:            var(--canvas);
  --bg-elev:       var(--surface);
  --bg-soft:       var(--surface-2);
  --text:          var(--ink);
  --text-muted:    var(--ink-muted);
  --border:        var(--rule);
  --border-strong: var(--rule-strong);
  --primary:       var(--accent);
  --primary-600:   var(--accent-hover);
  --primary-50:    var(--accent-tint);
  --success:       var(--positive);
  --success-50:    var(--positive-tint);
  --danger:        var(--negative);
  --danger-50:     var(--negative-tint);
  --warning-50:    var(--warning-tint);
}

/* ===== Modo oscuro: tinta sobre noche ===== */
[data-theme="dark"] {
  --canvas:     #0e1216;
  --surface:    #141a20;
  --surface-2:  #1a2027;
  --surface-3:  #232b34;
  --overlay:    rgba(0, 0, 0, 0.55);

  --ink:        #e8eaed;
  --ink-soft:   #b6bbc0;
  --ink-muted:  #82888d;
  --ink-quiet:  #555b60;

  --rule:           rgba(232, 234, 237, 0.07);
  --rule-strong:    rgba(232, 234, 237, 0.14);
  --rule-emphasis:  rgba(232, 234, 237, 0.28);

  --accent:        #6da9c2;
  --accent-hover:  #84bcd2;
  --accent-tint:   rgba(109, 169, 194, 0.14);
  --accent-line:   rgba(109, 169, 194, 0.65);

  --positive:       #7fb495;
  --positive-tint:  rgba(127, 180, 149, 0.14);
  --negative:       #d18879;
  --negative-tint:  rgba(209, 136, 121, 0.14);
  --warning:        #d4a868;
  --warning-tint:   rgba(212, 168, 104, 0.16);

  --shadow-xs:  0 1px 0 rgba(0, 0, 0, 0.30);
  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.40), 0 0 0 1px rgba(232, 234, 237, 0.04);
  --shadow:     0 12px 30px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(232, 234, 237, 0.05);
  --shadow-lg:  0 28px 60px rgba(0, 0, 0, 0.70), 0 0 0 1px rgba(232, 234, 237, 0.07);
}
@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    --canvas:     #0e1216;
    --surface:    #141a20;
    --surface-2:  #1a2027;
    --surface-3:  #232b34;
    --overlay:    rgba(0, 0, 0, 0.55);
    --ink:        #e8eaed;
    --ink-soft:   #b6bbc0;
    --ink-muted:  #82888d;
    --ink-quiet:  #555b60;
    --rule:           rgba(232, 234, 237, 0.07);
    --rule-strong:    rgba(232, 234, 237, 0.14);
    --rule-emphasis:  rgba(232, 234, 237, 0.28);
    --accent:        #6da9c2;
    --accent-hover:  #84bcd2;
    --accent-tint:   rgba(109, 169, 194, 0.14);
    --accent-line:   rgba(109, 169, 194, 0.65);
    --positive:       #7fb495;
    --positive-tint:  rgba(127, 180, 149, 0.14);
    --negative:       #d18879;
    --negative-tint:  rgba(209, 136, 121, 0.14);
    --warning:        #d4a868;
    --warning-tint:   rgba(212, 168, 104, 0.16);
    --shadow-xs:  0 1px 0 rgba(0, 0, 0, 0.30);
    --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.40), 0 0 0 1px rgba(232, 234, 237, 0.04);
    --shadow:     0 12px 30px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(232, 234, 237, 0.05);
    --shadow-lg:  0 28px 60px rgba(0, 0, 0, 0.70), 0 0 0 1px rgba(232, 234, 237, 0.07);
  }
}

/* ===== Reset minimalista ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
[hidden] { display: none !important; }

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font);
  font-feature-settings: "ss01", "ss02", "cv11";
  font-size: 14.5px;
  line-height: 1.5;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0 0 var(--s-2);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}
h1 { font-size: 28px; line-height: 1.18; }
h2 { font-size: 22px; line-height: 1.22; }
h3 { font-size: 17px; line-height: 1.3; }
h4 { font-size: 14px; line-height: 1.35; }

p { margin: 0 0 var(--s-3); }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
small { font-size: 12px; color: var(--ink-muted); }
.muted, .small { color: var(--ink-muted); }
.small { font-size: 12px; }

/* Números financieros: tabulares en cualquier `.tabular`,
   y por defecto en cualquier elemento con clase amount-in/out o num. */
.tabular, .num, .amount-in, .amount-out, table.data .num, .kpi__value {
  font-variant-numeric: tabular-nums lining-nums;
  font-feature-settings: "tnum" 1, "lnum" 1;
}

/* ===== Eyebrow / display ===== */
.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 var(--s-2);
}
.display {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.025em;
  margin: 0;
  color: var(--ink);
}
.display-sm {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.018em;
  color: var(--ink);
}
.lede {
  margin-top: var(--s-2);
  color: var(--ink-soft);
  max-width: 62ch;
  font-size: 14px;
}

/* ===== Scrollbars discretos ===== */
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb {
  background: var(--rule-strong);
  border: 2px solid transparent;
  background-clip: padding-box;
  border-radius: 999px;
}
*::-webkit-scrollbar-thumb:hover { background: var(--rule-emphasis); background-clip: padding-box; }
*::-webkit-scrollbar-track { background: transparent; }

/* ===== Layout ===== */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
  background: var(--canvas);
}

.sidebar {
  background: var(--canvas);
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-5) var(--s-5);
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.sidebar-header .logo-sm {
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--ink);
  color: var(--canvas);
  display: grid; place-items: center;
}
.sidebar-header .sidebar-close { display: none; margin-left: auto; }

.nav {
  display: flex;
  flex-direction: column;
  padding: var(--s-3) var(--s-3);
  gap: 1px;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 9px 12px 9px 14px;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: color .12s ease, background-color .12s ease;
}
.nav-item:hover {
  color: var(--ink);
  background: var(--surface-2);
  text-decoration: none;
}
.nav-item.active {
  color: var(--ink);
  background: var(--surface-2);
  font-weight: 600;
}
/* línea fina de acento a la izquierda — la firma del cuaderno */
.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: var(--accent);
}
/* segundo span = etiqueta de texto del nav */
.nav-item > span:nth-of-type(2) { line-height: 1; }

.sidebar-footer {
  padding: var(--s-4);
  border-top: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.user-box { display: flex; gap: var(--s-3); align-items: center; }
.avatar {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--canvas);
  display: grid; place-items: center;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: -0.01em;
}
.user-meta { min-width: 0; }
.user-name {
  font-weight: 600;
  font-size: 13px;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.user-email {
  font-size: 12px;
  color: var(--ink-muted);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* ===== Main area ===== */
.main { display: flex; flex-direction: column; min-width: 0; background: var(--canvas); }

.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 0 var(--s-6);
  background: var(--canvas);
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(8px);
}
.topbar-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
}
.topbar-actions { margin-left: auto; display: flex; gap: var(--s-2); }
#btn-open-sidebar { display: none; }

.view-container {
  padding: var(--s-7) var(--s-6);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--s-6);
  max-width: 1320px;
  width: 100%;
}

/* ===== Auth ===== */
.auth-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--s-5);
  background:
    radial-gradient(900px 480px at 12% 18%, var(--accent-tint), transparent 70%),
    radial-gradient(800px 420px at 88% 82%, var(--positive-tint), transparent 75%),
    var(--canvas);
}
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--s-7);
}
.auth-header { text-align: center; margin-bottom: var(--s-5); }
.auth-header .logo {
  width: 48px; height: 48px;
  margin: 0 auto var(--s-3);
  border-radius: 12px;
  background: var(--ink);
  color: var(--canvas);
  display: grid; place-items: center;
}
.auth-header h1 {
  font-size: 22px;
  margin: var(--s-2) 0 4px;
  letter-spacing: -0.02em;
}
.auth-tabs {
  display: flex;
  background: var(--surface-2);
  padding: 3px;
  border-radius: 999px;
  margin-bottom: var(--s-5);
}
.tab-btn {
  flex: 1;
  background: transparent;
  border: 0;
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  color: var(--ink-muted);
  font: inherit;
  font-weight: 500;
  font-size: 13px;
  transition: all .15s ease;
}
.tab-btn.active {
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-xs);
  font-weight: 600;
}
.auth-form { display: flex; flex-direction: column; gap: var(--s-3); }
.auth-error { color: var(--negative); font-size: 12.5px; min-height: 1em; margin: 0; }