/* ============================================================
   base.css — Design System Foundation
   Variables, Reset, Typography, Keyframes, Utilities
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Syne:wght@500;600;700;800&family=DM+Mono:wght@400;500&display=swap');

:root {
  color-scheme: dark;
  --bg: #0d1117;
  --surface: #151c28;
  --surface2: #1c2438;
  --border: #263040;
  --accent: #00e5a0;
  --accent-hover: #00c286;
  --accent2: #ff6b6b;
  --accent3: #ffd166;
  --accent4: #4dabf7;
  --purple: #a78bfa;
  --text: #e8edf5;
  --muted: #8a96b2;
  --glow: rgba(0, 229, 160, 0.06);

  --font-body: 'Inter', sans-serif;
  --font-head: 'Syne', sans-serif;
  --font-mono: 'DM Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

:root.light-theme {
  color-scheme: light;
  --bg: #f5f4f0;
  --surface: #ffffff;
  --surface2: #eae8e2;
  --border: #d4d1c9;
  --text: #1c1a17;
  --muted: #736f68;
  --glow: rgba(0, 194, 134, 0.04);
}

/* ── Resets ───────────────────────────────────────────────── */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
  background-image:
    radial-gradient(circle at 10% 20%, var(--glow), transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(77, 171, 247, 0.03), transparent 40%);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover { color: var(--accent-hover); }

/* ── Typography ──────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

/* ── Keyframes ───────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(24px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

/* ── Utilities ───────────────────────────────────────────── */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.text-accent { color: var(--accent); }
.text-danger { color: var(--accent2); }
.text-warning { color: var(--accent3); }
.text-info { color: var(--accent4); }
.font-mono { font-family: var(--font-mono); }
.font-head { font-family: var(--font-head); }
.font-body { font-family: var(--font-body); }

/* Financial / Status Tags */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
}
.tag-inc { background: rgba(0, 229, 160, 0.12); color: var(--accent); border: 1px solid rgba(0, 229, 160, 0.25); }
.tag-exp { background: rgba(255, 107, 107, 0.12); color: var(--accent2); border: 1px solid rgba(255, 107, 107, 0.25); }
.tag-loan { background: rgba(255, 209, 102, 0.12); color: var(--accent3); border: 1px solid rgba(255, 209, 102, 0.25); }
.tag-inv { background: rgba(77, 171, 247, 0.12); color: var(--accent4); border: 1px solid rgba(77, 171, 247, 0.25); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }
::-webkit-scrollbar-track { background: transparent; }

/* Skeleton loading shimmer */
.skeleton {
  background: linear-gradient(90deg, var(--surface2) 25%, var(--border) 50%, var(--surface2) 75%);
  background-size: 800px 100%;
  animation: shimmer 1.5s infinite linear;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1em;
  margin-bottom: 0.5em;
  border-radius: 4px;
}

.skeleton-card {
  height: 120px;
  border-radius: var(--radius-lg);
}

/* Page content wrapper — used on all inner pages */
.page-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 6rem; /* extra bottom for mobile nav */
  width: 100%;
  animation: fadeUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Page header block */
.page-header {
  margin-bottom: 2rem;
}

.page-header h2 {
  font-size: 2rem;
  font-weight: 700;
}

.page-header h2 span {
  color: var(--accent);
}

.page-header-sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.3rem;
}

/* Section label */
.section-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 700;
  margin-bottom: 1rem;
}