/* ============================================
   Base — Reset, Typography, Utilities
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; height: 100%; }
body { font-family: var(--font-primary); color: var(--text-primary); background: var(--bg-secondary); line-height: 1.5; -webkit-font-smoothing: antialiased; -webkit-tap-highlight-color: transparent; height: 100%; overflow: hidden; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
input, select, textarea, button { font-family: inherit; font-size: inherit; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: var(--radius-sm); }

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

/* Typography */
h1 { font-size: 1.75rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; }
h2 { font-size: 1.375rem; font-weight: 700; letter-spacing: -0.01em; line-height: 1.3; }
h3 { font-size: 1.125rem; font-weight: 600; line-height: 1.4; }

/* Utilities */
.fw-bold { font-weight: 700; } .fw-semibold { font-weight: 600; } .fw-medium { font-weight: 500; }
.text-sm { font-size: 0.8125rem; } .text-xs { font-size: 0.75rem; } .text-lg { font-size: 1.125rem; }
.text-muted { color: var(--text-muted); } .text-secondary { color: var(--text-secondary); }
.text-success { color: var(--success); } .text-danger { color: var(--danger); } .text-warning { color: var(--warning); }
.text-primary-color { color: var(--primary); }
.mb-1 { margin-bottom: var(--space-1); } .mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); } .mb-4 { margin-bottom: var(--space-4); }
.mt-1 { margin-top: var(--space-1); } .mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); } .mt-4 { margin-top: var(--space-4); }
.w-full { width: 100%; }
.hidden { display: none !important; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mono { font-family: var(--font-mono); }

/* Safe area for mobile notch */
.safe-top { padding-top: env(safe-area-inset-top, 0); }
.safe-bottom { padding-bottom: env(safe-area-inset-bottom, 0); }