/* ============================================
   BASE STYLES — Reset & Global
   ============================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: var(--primary-500);
    transition: color var(--duration-fast) var(--ease-smooth);
}

a:hover { color: var(--primary-700); }

img { max-width: 100%; height: auto; display: block; }

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
    font-size: inherit;
}

input, select, textarea {
    font-family: inherit;
    font-size: var(--font-size-sm);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--duration-fast) var(--ease-smooth);
    width: 100%;
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

input::placeholder { color: var(--text-tertiary); }

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

/* === Utility Classes === */
.screen { display: none; }
.screen.active { display: flex; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-muted { color: var(--text-secondary); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.w-full { width: 100%; }

.hidden { display: none !important; }
.visible { display: block !important; }

/* === Scrollbar === */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* === Selection === */
::selection {
    background: var(--primary-200);
    color: var(--primary-900);
}