/* styles.css */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,100..800;1,100..800&family=Plus+Jakarta+Sans:ital,wght@0,200..800;1,200..800&display=swap');

:root {
    --bg-color: #f5f3ef;
    --text-color: #403718;
    --text-muted: #656f77;
    --card-bg: #ffffff;
    --border-color: #eae5dc;
    --nav-bg-hover: #f0e5cf;
    --nav-bg-active: #eee9dc;
    --accent-color: #df072e;
    --accent-glow: rgba(223, 7, 46, 0.15);

    --body-font: "Plus Jakarta Sans", sans-serif;
    --code-font:"JetBrains Mono",
        monospace;
}

[data-theme="dark"] {
    --bg-color: #292c2f;
    --text-color: #f5f3ef;
    --text-muted: #807f7a;
    --card-bg: #1f2124;
    --border-color: #40371859;
    --nav-bg-hover: #3a3f43;
    --nav-bg-active: #594d26;
    --accent-color: #df072e;
    --accent-glow: rgba(223, 7, 46, 0.25);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--body-font);
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    max-width:1000px;
    margin:0 auto;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* Header */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background-color: var(--bg-color);
    z-index: 100;
}

.logo {
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.025em;
}

.inline-code{
    display: block;
    border-radius: 5px;
    padding: 2px 4px;
    font-family: var(--code-font);
    color: var(--accent-color);
    font-weight: 400;
    background-color: var(--nav-bg-hover);
}

.site-nav {
    display: flex;
    gap: 0.5rem;
    background: var(--card-bg);
    padding: 0.25rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
}

.nav-item {
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    transition: all 0.2s ease;
}

.nav-item:hover {
    background-color: var(--nav-bg-hover);
    color: var(--text-color);
}

.nav-item.active {
    background-color: var(--nav-bg-active);
    color: var(--text-color);
}

.active-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent-color);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-color);
}

.header-actions button {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-color);
    transition: background 0.2s;
}

.header-actions button:hover {
    background-color: var(--nav-bg-hover);
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: block;
}

/* Main Container */
.container {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: 3rem 1.5rem;
    flex: 1;
}

/* Index Intro */
.intro-section h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.intro-section p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 650px;
}

.social-links {
    display: flex;
    gap: 1.25rem;
}

.social-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--accent-color);
    padding-bottom: 2px;
}

/* Code Labs */
.page-header-section {
    margin-bottom: 2.5rem;
}

.page-header-section h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1rem;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    border-color: var(--text-muted);
}

.card-img-wrapper {
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background-color: var(--border-color);
}

.card-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-content {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card-content h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    font-family: var(--code-font);
}

.card-tags span {
    font-size: 0.75rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    color: var(--text-muted);
}

.card-links {
    margin-top: auto;
    display: flex;
    gap: 1rem;
}

.card-links a,
.timeline-links a {
    font-size: 0.875rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.card-links a:hover,
.timeline-links a:hover {
    text-decoration: underline;
}

/* Activity Timeline */
.timeline-section {
    position: relative;
    padding-left: 1.5rem;
    border-left: 2px solid var(--border-color);
    margin-left: 0.5rem;
}

.timeline {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.timeline-item {
    position: relative;
}

.timeline-marker {
    position: absolute;
    left: calc(-1.5rem - 6px);
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--accent-color);
    border: 2px solid var(--bg-color);
}

.timeline-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.timeline-content small{
    font-family: var(--code-font);
    font-size: 0.75rem;
    background: var(--nav-bg-hover);
    border: 1px solid var(--border-color);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    color: var(--text-muted);
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top:0.7rem;
    margin-bottom: 0.5rem;
}

.timeline-links {
    display: flex;
    gap: 1rem;
}

/* Footer */
.site-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer-left {
    display: flex;
    gap: 1rem;
}

.footer-left a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-left a:hover {
    color: var(--text-color);
}

@media (max-width: 640px) {
    .site-header {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .site-footer {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}