/*
 * GCT Bhakkar - Button Component Styles
 * Reusable button variants and states
 */

/* ===== BASE BUTTON ===== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    border-radius: var(--radius-lg);
    border: var(--border-width-default) solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ===== BUTTON SIZES ===== */

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    border-radius: var(--radius-xl);
}

/* ===== PRIMARY BUTTON ===== */

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent-primary), #1d4ed8);
    color: white;
    border-color: var(--color-accent-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1d4ed8, var(--color-accent-primary));
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

/* ===== SECONDARY BUTTON ===== */

.btn-secondary {
    background: var(--color-secondary-dark);
    color: var(--color-text-primary);
    border-color: var(--color-border-default);
}

.btn-secondary:hover {
    background: var(--color-tertiary-dark);
    border-color: var(--color-accent-primary);
    transform: translateY(-2px);
}

/* ===== OUTLINE BUTTONS ===== */

.btn-outline-primary {
    background: transparent;
    color: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
}

.btn-outline-primary:hover {
    background: var(--color-accent-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-outline-light {
    background: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-text-primary);
}

.btn-outline-light:hover {
    background: var(--color-text-primary);
    color: var(--color-primary-dark);
    transform: translateY(-2px);
}

/* ===== GHOST BUTTON ===== */

.btn-ghost {
    background: transparent;
    color: var(--color-text-primary);
    border-color: transparent;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-accent-primary);
}

/* ===== ACCENT BUTTON ===== */

.btn-accent {
    background: linear-gradient(135deg, var(--color-accent-gold), #d97706);
    color: var(--color-primary-dark);
    border-color: var(--color-accent-gold);
}

.btn-accent:hover {
    background: linear-gradient(135deg, #d97706, var(--color-accent-gold));
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.4);
}

/* ===== ICON BUTTON ===== */

.btn-icon {
    padding: var(--space-3);
    border-radius: var(--radius-full);
}

.btn-icon.btn-sm {
    padding: var(--space-2);
}

.btn-icon.btn-lg {
    padding: var(--space-4);
}

/* ===== BUTTON WITH ICON ===== */

.btn i,
.btn svg {
    font-size: 1.1em;
}

/* ===== BUTTON GROUP ===== */

.btn-group {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.btn-group.btn-group-center {
    justify-content: center;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 576px) {
    .btn {
        padding: var(--space-3) var(--space-5);
        font-size: var(--text-sm);
    }

    .btn-lg {
        padding: var(--space-3) var(--space-6);
        font-size: var(--text-base);
    }
}

/* ===== BACK TO TOP BUTTON ===== */

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.5rem;
    height: 3.5rem;
    background: var(--color-accent-primary);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-accent-secondary);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.5);
}

.back-to-top:active {
    transform: translateY(-2px);
}