/* CyberOoHim.github.io - Professional Tech Theme */

/* Custom Font Declarations */
@font-face {
    font-family: 'ChiayiCity';
    src: url('../fonts/ChiayiCity.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'LessonOne';
    src: url('../fonts/LessonOne-BoldItalic.ttf') format('truetype');
    font-weight: bold;
    font-style: italic;
    font-display: swap;
}

/* Variables */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;

    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-link: #58a6ff;
    --text-accent: #238636;

    --border-color: #30363d;

    --font-mono: 'LessonOne', 'Noto Sans', sans-serif;
    --font-sans: 'ChiayiCity', 'Times New Roman', serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;

    --container-width: 800px;
    --header-height: 70px;
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: color 0.2s ease;
    /* Improve touch responsiveness */
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(88, 166, 255, 0.2);
}

a:hover {
    text-decoration: underline;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-mono);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

code {
    font-family: var(--font-mono);
    background: var(--bg-secondary);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

pre {
    background: var(--bg-secondary);
    padding: var(--spacing-sm);
    border-radius: 6px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

img {
    max-width: 100%;
    border-radius: 6px;
}

/* Layout Classes */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    width: 100%;
}

/* Header */
.site-header {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(5px);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.site-title:hover {
    text-decoration: none;
    color: var(--text-link);
}

.site-logo {
    width: 40px;
    height: 40px;
    margin-right: var(--spacing-xs);
    margin-bottom: 6px;
    vertical-align: middle;
    flex-shrink: 0;
    filter: drop-shadow(-2px 0 0 #32cd32) drop-shadow(2px 0 0 #ff6347);
}

@media (prefers-color-scheme: dark) {
    .site-logo {
        filter: drop-shadow(-2px 0 0 rgba(50, 205, 50, 0.5)) drop-shadow(2px 0 0 rgba(255, 99, 71, 0.5)) drop-shadow(0 0 5px rgba(50, 205, 50, 0.15));
    }
}

.site-nav {
    display: flex;
    gap: var(--spacing-md);
}

.site-nav a {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    /* Improve touch targets */
    padding: 8px 4px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
}

.site-nav a:hover,
.site-nav a.current {
    color: var(--text-primary);
    text-decoration: none;
}

/* Main Content */
.page-content {
    flex: 1;
    padding: var(--spacing-lg) 0;
    animation: fadeIn 0.5s ease-out;
}

/* Homepage / Posts */
.home h1 {
    font-size: 2.5rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.posts {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.post-card {
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 8px;
    transition: transform 0.2s ease, border-color 0.2s ease;
    position: relative;
}

/* Only apply hover transform on non-touch devices */
@media (hover: hover) and (pointer: fine) {
    .post-card:hover {
        transform: translateY(-2px);
        border-color: var(--text-link);
    }
}

/* On touch devices, use active state instead */
@media (hover: none) and (pointer: coarse) {
    .post-card:active {
        border-color: var(--text-link);
        opacity: 0.9;
    }
}

.post-title {
    margin-bottom: var(--spacing-xs);
}

.post-title a {
    color: var(--text-primary);
    text-decoration: none;
    /* Make the entire link area clickable - extend touch target */
    display: block;
    min-height: 44px;
    /* iOS minimum touch target size */
    padding: 4px 0;
    /* Prevent text selection issues on touch devices */
    -webkit-tap-highlight-color: rgba(88, 166, 255, 0.2);
    /* Ensure smooth touch interactions */
    touch-action: manipulation;
    cursor: pointer;
}

.post-meta {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    margin-top: auto;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Utilities */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Banner */
.hero-banner {
    /* Grey filter overlay: adjust opacity values (0.0-1.0) to control darkness. Lower = lighter, Higher = darker */
    background-image: linear-gradient(rgba(13, 17, 23, 0.5), rgba(13, 17, 23, 0.5)), url('../images/banner.webp');
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-md);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-banner::before {
    /* Optional: Keep the grid pattern overlay if desired, or remove it. 
       Let's keep it for extra tech feel on top of the image */
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(88, 166, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(88, 166, 255, 0.05) 1px, transparent 1px);
    background-size: 20px 20px;
    pointer-events: none;
    z-index: 0;
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-family: var(--font-mono);
    color: var(--text-link);
    font-size: 1.1rem;
    position: relative;
    z-index: 1;
    font-weight: bold;
}

/* Details / Expander */
details {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
}

summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    list-style: none;
    /* Hide default triangle */
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

summary::before {
    content: '▶';
    font-size: 0.8rem;
    transition: transform 0.2s;
}

details[open] summary::before {
    transform: rotate(90deg);
}

details[open] summary {
    margin-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
}

/* External Link Icon */
.external-link-icon {
    display: inline-block;
    vertical-align: middle;
    margin-left: 0.25rem;
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.post-title a:hover .external-link-icon {
    opacity: 1;
}

/* Responsive */
@media (max-width: 600px) {
    :root {
        --spacing-lg: 2rem;
    }

    /* Improve touch targets on mobile */
    .site-nav {
        gap: var(--spacing-sm);
    }

    .site-nav a {
        font-size: 0.85rem;
        padding: 10px 6px;
    }

    /* Ensure post cards are easy to tap */
    .post-card {
        padding: var(--spacing-sm);
    }

    .post-title {
        font-size: 1.1rem;
    }

    .post-title a {
        min-height: 48px;
        /* Slightly larger on mobile */
        padding: 6px 0;
    }
}