/**
 * Nebula Theme - Main Styles
 * Main layout and page-specific styles
 * Version: 2.0.1
 */

/* ============================
   Layout Containers
   ============================ */

.container {
    width: 100%;
    max-width: var(--nebula-container-max, 1200px);
    margin: 0 auto;
    padding: 0 var(--nebula-page-padding, 16px);
}

/* ============================
   Main Content Area
   ============================ */

.nebula-content-with-tabs {
    padding: 32px 0;
}

.nebula-content-with-tabs__inner {
    display: flex;
    gap: 32px;
    flex-direction: column;
}

@media (min-width: 1024px) {
    .nebula-content-with-tabs__inner {
        flex-direction: row;
    }
}

/* ============================
   Main Content Column
   ============================ */

.nebula-content-with-tabs__main {
    flex: 1;
    min-width: 0;
}

/* ============================
   Sidebar Column
   ============================ */

.nebula-content-with-tabs__sidebar {
    width: 100%;
}

@media (min-width: 1024px) {
    .nebula-content-with-tabs__sidebar {
        width: 320px;
        flex-shrink: 0;
    }
}

/* ============================
   Section Spacing
   ============================ */

.nebula-section {
    padding: 48px 0;
}

.nebula-section--lg {
    padding: 80px 0;
}

/* ============================
   Utility Classes
   ============================ */

.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================
   Unified Pagination
   ============================ */
.nebula-pagination {
    text-align: center;
    padding: 32px 0;
}

.nebula-pagination .page-numbers {
    display: inline-block;
    padding: 8px 14px;
    margin: 0 4px;
    border: 1px solid var(--nebula-border, #E2E8F0);
    border-radius: var(--nebula-radius-md, 8px);
    color: var(--nebula-text-secondary, #64748b);
    text-decoration: none;
    transition: all 0.2s;
}

.nebula-pagination .page-numbers:hover {
    background: var(--nebula-bg-secondary, #F8FAFC);
    border-color: var(--nebula-primary, #0EA5E9);
    color: var(--nebula-primary, #0EA5E9);
}

.nebula-pagination .page-numbers.current {
    background: var(--nebula-primary, #0EA5E9);
    color: #fff;
    border-color: var(--nebula-primary, #0EA5E9);
}

/* ============================
   Breadcrumb
   ============================ */
.nebula-breadcrumb {
    padding: 12px 0;
    font-size: 0.85rem;
    color: var(--nebula-text-muted, #94A3B8);
    border-bottom: 1px solid var(--nebula-border, #E2E8F0);
    background: var(--nebula-bg, #FFFFFF);
}

.nebula-breadcrumb a {
    color: var(--nebula-text-secondary, #64748b);
    text-decoration: none;
    transition: color 0.2s;
}

.nebula-breadcrumb a:hover {
    color: var(--nebula-primary, #0EA5E9);
}

.nebula-breadcrumb__sep {
    margin: 0 8px;
    font-weight: bold;
}

.nebula-breadcrumb__current {
    color: var(--nebula-text, #1E293B);
    font-weight: 500;
}

/* ============================
   No Results (unified)
   ============================ */
.nebula-no-results {
    text-align: center;
    padding: 60px 20px;
}

.nebula-no-results__title {
    font-size: 1.5rem;
    color: var(--nebula-text, #1E293B);
    margin: 16px 0 8px;
}

.nebula-no-results__desc {
    color: var(--nebula-text-secondary, #64748b);
    margin-bottom: 24px;
}

.nebula-no-results__cats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 24px;
}

.nebula-no-results__cat {
    padding: 6px 14px;
    background: var(--nebula-bg-secondary, #F8FAFC);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--nebula-text-secondary, #64748b);
    text-decoration: none;
    transition: all 0.2s;
}

.nebula-no-results__cat:hover {
    background: var(--nebula-primary, #0EA5E9);
    color: #fff;
}

/* ============================
   Button Loading State
   ============================ */
.nebula-btn.is-loading,
.nebula-btn--loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.nebula-btn.is-loading::after,
.nebula-btn--loading::after {
    content: '';
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: nebula-spin 0.6s linear infinite;
    margin-left: 8px;
    vertical-align: middle;
}

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

/* ============================
   Mobile Font Size
   ============================ */
@media (max-width: 768px) {
    .nebula-article-content {
        font-size: 0.95rem;
    }
    .nebula-article-header__title {
        font-size: 1.35rem !important;
    }
    .nebula-page-content {
        font-size: 0.95rem;
    }
}
/* Fix: Add top spacing for sticky header */
.nebula-main {
    flex: 1;
    padding-top: var(--nebula-header-height, 64px);
}

@media (max-width: 768px) {
    .nebula-main {
        padding-top: 48px;
    }
}

/* Ensure content doesn't go under fixed header */
.nebula-page {
    padding-top: 0;
}

.nebula-content-with-tabs {
    padding-top: calc(32px + var(--nebula-header-height, 64px));
}

@media (max-width: 768px) {
    .nebula-content-with-tabs {
        padding-top: calc(32px + 56px);
    }
}