/**
 * Longevity Hub Theme - Custom Styles
 *
 * Styles matching the design reference.
 *
 * @package Longevity_Hub
 * @since 1.0.0
 */

/* ============================================
   Base Typography
   ============================================ */

* {
    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

.font-mono {
    font-family: 'IBM Plex Mono', monospace;
}

/* Headline Font - Instrument Serif */
h1, h2, h3, h4,
h1 *, h2 *, h3 *, h4 *,
.font-headline {
    font-family: 'Instrument Serif', Georgia, serif;
}

/* Revert Article Card headlines and their children to Sans-Serif */
.article-card h1, .article-card h1 *,
.article-card h2, .article-card h2 *,
.article-card h3, .article-card h3 *,
.article-card h4, .article-card h4 *,
/* Also use Sans-Serif for H2 on single pages and aside sidebars as requested */
.single-longevity_article h2, .single-longevity_article h2 *,
aside h2, aside h2 *,
aside h3, aside h3 * {
    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif !important;
}

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

.article-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid #e5e7eb;
}

.article-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px -10px rgba(14, 165, 233, 0.15);
    border-color: #0ea5e9;
}

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

.filter-btn {
    transition: all 0.2s ease;
    cursor: pointer;
}

.filter-btn.active {
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    color: white;
    border-color: transparent;
}

.filter-btn:not(.active):hover {
    border-color: #7dd3fc;
}

/* ============================================
   Navigation Links
   ============================================ */

.nav-link {
    position: relative;
    transition: color 0.2s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #0ea5e9, #22c55e);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Navigation menu list styles */
.main-navigation ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-navigation li {
    position: relative;
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* Stagger delays for cards */
.stagger-1 { animation-delay: 0.1s; opacity: 0; }
.stagger-2 { animation-delay: 0.2s; opacity: 0; }
.stagger-3 { animation-delay: 0.3s; opacity: 0; }
.stagger-4 { animation-delay: 0.4s; opacity: 0; }
.stagger-5 { animation-delay: 0.5s; opacity: 0; }
.stagger-6 { animation-delay: 0.6s; opacity: 0; }

/* Pulse animation for badge dot */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.pulse-dot {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Spin animation for loading */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.animate-spin {
    animation: spin 1s linear infinite;
}

/* ============================================
   Badge Styles
   ============================================ */

.explanation-badge {
    background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%);
    border: 1px solid #86efac;
    color: #166534;
}

.technical-badge {
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    border: 1px solid #7dd3fc;
    color: #075985;
}

/* ============================================
   Toggle / Collapsible Content
   ============================================ */

.toggle-btn {
    cursor: pointer;
    user-select: none;
}

.explanation-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.explanation-content.expanded {
    max-height: 1000px;
}

.toggle-icon.rotated {
    transform: rotate(180deg);
}

/* ============================================
   Gradient Background
   ============================================ */

.gradient-bg {
    background: linear-gradient(135deg, #f0f9ff 0%, #f0fdf4 100%);
}

/* ============================================
   Scrollbar Hiding
   ============================================ */

.scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.scrollbar-hide::-webkit-scrollbar {
    display: none;
}

/* ============================================
   Footer Styles
   ============================================ */

.site-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* ============================================
   Prose Content Styles
   ============================================ */

.prose {
    color: #404040;
    line-height: 1.75;
}

.prose h2 {
    color: #171717;
    font-weight: 700;
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.prose h3 {
    color: #171717;
    font-weight: 600;
    font-size: 1.25rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.prose p {
    margin-bottom: 1.25rem;
}

.prose a {
    color: #0284c7;
    text-decoration: underline;
}

.prose a:hover {
    color: #0369a1;
}

.prose ul,
.prose ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.prose li {
    margin-bottom: 0.5rem;
}

.prose blockquote {
    border-left: 4px solid #22c55e;
    padding-left: 1rem;
    font-style: italic;
    color: #525252;
    margin: 1.5rem 0;
}

.prose img {
    border-radius: 0.5rem;
    margin: 1.5rem 0;
}

.prose code {
    background: #f5f5f5;
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
    font-size: 0.875em;
    font-family: 'IBM Plex Mono', monospace;
}

.prose pre {
    background: #262626;
    color: #f5f5f5;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}

.prose pre code {
    background: transparent;
    padding: 0;
}

/* ============================================
   Screen Reader Text
   ============================================ */

.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}

.screen-reader-text:focus {
    background-color: #f1f1f1;
    border-radius: 3px;
    box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.6);
    clip: auto !important;
    clip-path: none;
    color: #21759b;
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    height: auto;
    left: 5px;
    line-height: normal;
    padding: 15px 23px 14px;
    text-decoration: none;
    top: 5px;
    width: auto;
    z-index: 100000;
}

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

@media (max-width: 768px) {
    /* Hero adjustments */
    .text-5xl {
        font-size: 2.5rem;
    }

    /* Filter bar scroll on mobile */
    .filter-btn {
        flex-shrink: 0;
    }

    /* Value props stack */
    .grid-cols-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 640px) {
    /* Even smaller screens */
    .text-5xl {
        font-size: 2rem;
    }

    .md\\:text-6xl {
        font-size: 2rem;
    }
}

/* Hero H1 Size Adjustment */
@media (min-width: 768px) {
    .text-5xl.md\:text-6xl {
        font-size: 5rem !important;
    }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .site-header,
    .site-footer,
    .filter-btn,
    .toggle-btn,
    #pagination {
        display: none !important;
    }

    .article-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #e5e5e5;
        opacity: 1 !important;
    }

    .fade-in-up {
        animation: none;
        opacity: 1;
    }
}

/* ============================================
   Accessibility
   ============================================ */

:focus-visible {
    outline: 2px solid #0ea5e9;
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .fade-in-up {
        animation: none;
        opacity: 1;
    }

    .stagger-1,
    .stagger-2,
    .stagger-3,
    .stagger-4,
    .stagger-5,
    .stagger-6 {
        opacity: 1;
    }
}

/* ============================================
   Custom Logo Styling
   ============================================ */

.custom-logo-link {
    display: flex;
    align-items: center;
}

.custom-logo {
    max-height: 40px;
    width: auto;
}