/* ============================================
   BUTTONS - Unified Button Styling
   ============================================ */

/* Base button styles */
button {
    font-family: var(--font-display);
    padding: 8px 14px;
    background: var(--space-600);
    color: var(--text-secondary);
    border: 1px solid var(--space-400);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.85em;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

button:hover {
    background: var(--space-500);
    border-color: var(--clr-primary);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

button.active {
    background: rgba(var(--clr-primary-rgb), 0.2);
    border-color: var(--clr-primary);
    color: var(--clr-primary);
    box-shadow: var(--glow-primary);
}

/* Button groups */
.btn-group {
    display: flex;
    gap: 4px;
    align-items: center;
}

.btn-group button {
    flex: 1;
}

.btn-group button:first-child {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.btn-group button:last-child {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.btn-group button:not(:first-child):not(:last-child) {
    border-radius: 0;
}

/* Primary button variant */
.btn-primary {
    background: var(--gradient-primary);
    border-color: var(--clr-primary);
    color: var(--space-900);
    font-weight: 600;
}

.btn-primary:hover {
    background: var(--clr-primary);
    box-shadow: var(--glow-primary-strong);
}

/* Secondary button variant */
.btn-secondary {
    background: transparent;
    border-color: var(--border-light);
}

.btn-secondary:hover {
    background: var(--space-600);
}

/* Small button variant */
.btn-sm {
    padding: 4px 8px;
    font-size: 0.75rem;
    min-height: 24px;
}

/* Large button variant */
.btn-lg {
    padding: 12px 20px;
    font-size: 1rem;
    min-height: 44px;
}

/* Icon-only buttons */
.btn-icon {
    padding: 6px;
    min-width: 32px;
    width: 32px;
    height: 32px;
}