/* PsychLab — Global Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Color palette — neutral/scientific */
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-text: #1a1a2e;
    --color-text-secondary: #5a6270;
    --color-text-muted: #8b929d;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-accent: #059669;
    --color-accent-light: #d1fae5;
    --color-error: #dc2626;
    --color-error-light: #fee2e2;
    --color-warning: #d97706;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    /* Category colors */
    --cat-visual: #7c3aed;
    --cat-cognitive: #2563eb;
    --cat-attention: #0891b2;
    --cat-auditory: #d97706;
    --cat-methods: #059669;
    --cat-rt: #dc2626;

    /* Typography */
    --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    --font-serif: 'Georgia', 'Palatino', 'Times New Roman', serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Borders & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --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 30px rgba(0,0,0,0.12);
}

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

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

h1, h2, h3, h4 {
    line-height: 1.3;
    font-weight: 600;
}
h1 { font-size: 1.75rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }
h4 { font-size: 1rem; }

a {
    color: var(--color-primary);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.15s ease;
    font-family: var(--font-body);
    gap: 0.5rem;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-sm {
    padding: 0.35rem 0.9rem;
    font-size: 0.85rem;
}

/* Category badges */
.badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 99px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.badge-visual { background: #ede9fe; color: var(--cat-visual); }
.badge-cognitive { background: var(--color-primary-light); color: var(--cat-cognitive); }
.badge-attention { background: #cffafe; color: var(--cat-attention); }
.badge-auditory { background: #fef3c7; color: var(--cat-auditory); }
.badge-methods { background: var(--color-accent-light); color: var(--cat-methods); }
.badge-rt { background: var(--color-error-light); color: var(--cat-rt); }
.badge-memory { background: #fce7f3; color: #be185d; }
.badge-multisensory { background: #ede9fe; color: #6d28d9; }

/* Utility classes */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-secondary); }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mb-1 { margin-top: var(--space-md); }