/* ============================================================
   Buttons
   ============================================================ */

.nerdhub-button {
    min-height: 42px;
    padding: 0 var(--nh-space-4);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--nh-space-2);
    border: 1px solid transparent;
    border-radius: var(--nh-radius-md);
    font-size: var(--nh-font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--nh-transition-fast), border-color var(--nh-transition-fast), color var(--nh-transition-fast), box-shadow var(--nh-transition-fast), transform var(--nh-transition-fast);
}

    .nerdhub-button svg {
        width: 17px !important;
        height: 17px !important;
    }

    .nerdhub-button:active:not(:disabled) {
        transform: translateY(1px);
    }

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


/* Primary */

.nerdhub-button-primary {
    background: var(--nh-brand-700);
    border-color: var(--nh-brand-700);
    color: #ffffff;
}

    .nerdhub-button-primary:hover:not(:disabled) {
        background: var(--nh-brand-600);
        border-color: var(--nh-brand-600);
    }

    .nerdhub-button-primary:focus-visible {
        box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.20);
    }

.nerdhub-button-secondary {
    background: var(--nh-surface);
    border-color: var(--nh-border);
    color: var(--nh-text-secondary);
}

    .nerdhub-button-secondary:hover:not(:disabled) {
        background: var(--nh-surface-hover);
        border-color: var(--nh-border-hover);
        color: var(--nh-text);
    }


/* ============================================================
   Page
   ============================================================ */

.nerdhub-page {
    width: 100%;
    position: relative;
    max-width: var(--nh-content-width);
    margin: 0 auto;
    padding: var(--nh-space-10) var(--nh-content-padding) var(--nh-space-16);
}


/* ============================================================
   Page Header
   ============================================================ */

.nerdhub-page-header {
    margin-bottom: var(--nh-space-8);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--nh-space-6);
}

    .nerdhub-page-header h1 {
        margin: 0;
        color: var(--nh-text);
        font-size: var(--nh-font-size-3xl);
        font-weight: 750;
        letter-spacing: -0.035em;
    }

    .nerdhub-page-header p {
        margin: var(--nh-space-2) 0 0;
        color: var(--nh-text-muted);
        font-size: var(--nh-font-size-sm);
        line-height: var(--nh-line-height-relaxed);
    }


/* ============================================================
   Eyebrow
   ============================================================ */

.nerdhub-eyebrow {
    display: block;
    margin-bottom: var(--nh-space-2);
    color: var(--nh-brand-400);
    font-size: var(--nh-font-size-xs);
    font-weight: 700;
    letter-spacing: 0.10em;
    text-transform: uppercase;
}

.nerdhub-eyebrow-link {
    display: inline-flex;
    align-items: center;
    gap: var(--nh-space-2);
    text-decoration: none;
    transition: color var(--nh-transition-fast);
}

    .nerdhub-eyebrow-link:hover {
        color: var(--nh-brand-300);
    }

    .nerdhub-eyebrow-link svg {
        width: 15px !important;
        height: 15px !important;
    }

/* ============================================================
   Cards
   ============================================================ */

.nerdhub-card {
    background: var(--nh-surface);
    border: 1px solid var(--nh-border);
    border-radius: var(--nh-radius-lg);
    box-shadow: var(--nh-shadow-sm);
}


/* ============================================================
   Stat Cards
   ============================================================ */

.nerdhub-stat-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--nh-space-4);
    margin-bottom: var(--nh-space-10);
}

.nerdhub-stat-card {
    padding: var(--nh-space-5);
    display: flex;
    flex-direction: column;
    gap: var(--nh-space-1);
    background: var(--nh-surface);
    border: 1px solid var(--nh-border);
    border-radius: var(--nh-radius-lg);
    box-shadow: var(--nh-shadow-sm);
}

    .nerdhub-stat-card > span {
        color: var(--nh-text-muted);
        font-size: var(--nh-font-size-sm);
    }

    .nerdhub-stat-card > strong {
        color: var(--nh-text);
        font-size: var(--nh-font-size-2xl);
        font-weight: 750;
        line-height: 1.1;
    }

    .nerdhub-stat-card > small {
        color: var(--nh-text-subtle);
        font-size: var(--nh-font-size-xs);
    }

.nerdhub-stat-good {
    color: var(--nh-success) !important;
}

.nerdhub-stat-warning {
    color: var(--nh-warning) !important;
}


/* ============================================================
   Loading
   ============================================================ */

.nerdhub-loading {
    min-height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--nh-space-4);
    color: var(--nh-text-muted);
}

    .nerdhub-loading > div:last-child {
        display: flex;
        flex-direction: column;
        gap: var(--nh-space-1);
    }

    .nerdhub-loading strong {
        color: var(--nh-text);
    }

    .nerdhub-loading span {
        font-size: var(--nh-font-size-sm);
    }

.nerdhub-loading-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid var(--nh-border);
    border-top-color: var(--nh-brand-500);
    border-radius: 50%;
    animation: nerdhub-spin 0.8s linear infinite;
}

@keyframes nerdhub-spin {
    to {
        transform: rotate(360deg);
    }
}


/* ============================================================
   Button Spinner
   ============================================================ */

.button-spinner {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: nerdhub-spin 0.7s linear infinite;
}


/* ============================================================
   Navigation Progress
   ============================================================ */

.nerdhub-navigation-progress {
    position: fixed;
    top: var(--nh-header-height);
    left: 0;
    right: 0;
    height: 2px;
    z-index: 9999;
    overflow: hidden;
    pointer-events: none;
    background: transparent;
}

.nerdhub-navigation-progress-bar {
    width: 35%;
    height: 100%;
    background: var(--nh-brand-400);
    box-shadow: 0 0 8px rgba(45, 212, 191, 0.65);
    animation: nerdhub-navigation-progress 900ms ease-in-out infinite;
}

@keyframes nerdhub-navigation-progress {
    0% {
        transform: translateX(-100%);
    }

    50% {
        transform: translateX(180%);
    }

    100% {
        transform: translateX(320%);
    }
}


/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 800px) {

    .nerdhub-page {
        padding: var(--nh-space-8) var(--nh-space-5) var(--nh-space-12);
    }

    .nerdhub-page-header {
        flex-direction: column;
    }

    .nerdhub-stat-grid {
        grid-template-columns: 1fr;
    }
}


/* ============================================================
   Modal
   ============================================================ */

.nerdhub-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--nh-space-6);
    background: rgba(0, 0, 0, 0.65);
}

.nerdhub-confirmation-modal {
    width: 100%;
    max-width: 520px;
    padding: var(--nh-space-6);
    background: var(--nh-surface);
    border: 1px solid var(--nh-border);
    border-radius: var(--nh-radius-xl);
    box-shadow: var(--nh-shadow-lg);
}

.nerdhub-confirmation-icon {
    width: 44px;
    height: 44px;
    margin-bottom: var(--nh-space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--nh-radius-md);
    background: var(--nh-brand-700);
    color: var(--nh-brand-100);
}

    .nerdhub-confirmation-icon svg {
        width: 21px !important;
        height: 21px !important;
    }

.nerdhub-confirmation-content h2 {
    margin: 0;
    color: var(--nh-text);
    font-size: var(--nh-font-size-xl);
    font-weight: 700;
}

.nerdhub-confirmation-content p {
    margin: var(--nh-space-3) 0 0;
    color: var(--nh-text-secondary);
    font-size: var(--nh-font-size-sm);
    line-height: var(--nh-line-height-relaxed);
}

.nerdhub-confirmation-actions {
    margin-top: var(--nh-space-6);
    display: flex;
    justify-content: flex-end;
    gap: var(--nh-space-3);
}