/*
 * CloudKlass Academy - Component CSS
 * Reusable UI components
 */

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-inverse);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-alt);
    border-color: var(--text-muted);
}

.btn-accent {
    background: var(--accent);
    color: var(--text-inverse);
}

.btn-accent:hover:not(:disabled) {
    background: var(--accent-light);
    transform: translateY(-1px);
}

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

.btn-ghost:hover:not(:disabled) {
    background: var(--primary-bg);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-full {
    width: 100%;
}

.btn-icon {
    padding: 0.75rem;
}

/* ===== Cards ===== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
    border: 1px solid var(--border);
}

.card-hover {
    transition: all var(--transition);
}

.card-hover:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    margin-bottom: var(--space-lg);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--space-xs);
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: var(--space-sm);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text);
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:disabled {
    background: var(--bg-alt);
    cursor: not-allowed;
}

.form-input.error {
    border-color: var(--error);
}

.form-input.error:focus {
    box-shadow: 0 0 0 3px var(--error-bg);
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.form-error {
    font-size: 0.8125rem;
    color: var(--error);
    margin-top: var(--space-xs);
}

/* ===== Alerts ===== */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.alert-info {
    background: var(--primary-bg);
    color: var(--primary-dark);
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.alert-error {
    background: var(--error-bg);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ===== Navigation ===== */
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--text);
    text-decoration: none;
}

.nav-brand img {
    height: 32px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    list-style: none;
}

.nav-link {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link.active {
    color: var(--primary);
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-sm);
    cursor: pointer;
}

@media (max-width: 767px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--card-bg);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        transform: translateX(-100%);
        transition: transform var(--transition);
        z-index: 100;
    }

    .nav-links.open {
        transform: translateX(0);
    }
}

/* ===== Dividers ===== */
.divider {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--text-muted);
    font-size: 0.875rem;
    margin: var(--space-lg) 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ===== Avatars ===== */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--primary-bg);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
}

.avatar-lg {
    width: 64px;
    height: 64px;
    font-size: 1.5rem;
}

/* ===== Badges ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-full);
}

.badge-primary {
    background: var(--primary-bg);
    color: var(--primary);
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
}

/* ===== Logo ===== */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.logo-text {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
}

.logo-text span {
    color: var(--primary);
}