:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --accent-color: #3da159;
    --accent-hover: #3b9655;
    --card-bg: #161b22;
    --border-color: #30363d;
    --header-bg: #1c2128;
    --header-text: #ffffff;
    --header-border: #30363d;
    --secondary-text: #8b949e;
    --shadow-color: rgba(0,0,0,0.3);
    --btn-github-bg: #30363d;
    --btn-github-text: #c9d1d9;
}

[data-theme="light"] {
    --bg-color: #f6f8fa;
    --text-color: #24292e;
    --accent-color: #3da159;
    --accent-hover: #3b9655;
    --card-bg: #ffffff;
    --border-color: #d1d5da;
    --header-bg: #24292e;
    --header-text: #ffffff;
    --header-border: transparent;
    --secondary-text: #586069;
    --shadow-color: rgba(0,0,0,0.08);
    --btn-github-bg: #24292e;
    --btn-github-text: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 1rem 0;
    margin-bottom: 2.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-bottom: 1px solid var(--header-border, transparent);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.lang-switch {
    display: flex;
    gap: 8px;
}

.lang-switch button {
    background: transparent;
    border: 1px solid var(--header-text);
    color: var(--header-text);
    padding: 5px 12px;
    cursor: pointer;
    border-radius: 6px;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.lang-switch button:hover {
    background: rgba(255,255,255,0.1);
}

.lang-switch button.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.intro {
    text-align: center;
    margin-bottom: 3.5rem;
    padding: 2rem 0;
}

.intro h1 {
    font-size: 2.8rem;
    margin-bottom: 0.8rem;
    color: var(--text-color);
}

.intro p {
    font-size: 1.2rem;
    color: var(--secondary-text);
    max-width: 600px;
    margin: 0 auto;
}
.projects h2,
.changelog-section h2 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.changelog-section {
    margin-bottom: 3rem;
}

.changelog-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
}

.update-item {
    padding: 0.5rem 0;
    font-size: 0.95rem;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
}

.update-item:last-child {
    border-bottom: none;
}

.update-date {
    font-weight: 600;
    color: var(--secondary-text);
    font-size: 0.85rem;
}

.items-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover {
    box-shadow: 0 4px 12px var(--shadow-color);
    transform: translateY(-2px);
}

.project-info h3 {
    margin: 0 0 0.5rem 0;
}
.project-info p {
    margin: 0 0 0.75rem 0;
    color: var(--secondary-text);
    font-size: 0.95rem;
}

.project-changelog {
    font-size: 0.85rem;
    color: var(--secondary-text);
    padding: 0.5rem 0.75rem;
    background: var(--bg-color);
    border-radius: 4px;
    border-left: 3px solid var(--accent-color);
}

.project-changelog strong {
    margin-right: 0.3rem;
}

.project-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
    margin-left: 1.5rem;
    min-width: 120px;
}

.repo-btn {
    text-decoration: none;
    color: #ffffff;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: inherit;
    line-height: 1.6;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: filter 0.2s;
    white-space: nowrap;
    border: none;
    cursor: pointer;
    box-sizing: border-box;
}

.project-links .repo-btn {
    width: 100%;
}

.repo-btn:hover {
    filter: brightness(1.15);
}

.btn-github {
    background-color: var(--btn-github-bg);
    color: var(--btn-github-text);
}

.btn-gitgud {
    background-color: #6d559b;
}

.btn-preset {
    background-color: var(--accent-color);
}

.btn-note {
    background-color: #bd5232;
}

/* Tabs */
.tabs-section {
    margin-bottom: 3rem;
}

.tabs-nav {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--secondary-text);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color 0.2s, border-color 0.2s;
}

.tab-btn:hover {
    color: var(--text-color);
}

.tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

footer {
    margin-top: 5rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

/* Nav controls & Theme toggle */
.nav-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--header-text);
    color: var(--header-text);
    padding: 5px 12px;
    cursor: pointer;
    border-radius: 6px;
    font-size: 0.85rem;
    transition: all 0.2s;
    margin-left: 8px;
}

.theme-toggle:hover {
    background: rgba(255,255,255,0.1);
}

.theme-toggle.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

@media (max-width: 600px) {
    .project-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .project-links {
        flex-direction: row;
        flex-wrap: wrap;
        margin-left: 0;
        min-width: 0;
        width: 100%;
    }

    .project-links .repo-btn {
        flex: 1 1 0;
        min-width: 0;
    }

    .intro h1 {
        font-size: 2rem;
    }

    .modal__container {
        max-width: 95vw;
        width: 98%;
        height: 90vh;
    }

    .modal__header {
        padding: 0.75rem 20px;
    }

    .modal__content {
        padding: 1rem 20px 1.5rem;
    }

    .modal__footer {
        display: flex;
    }
}

/* ========== MicroModal Styles ========== */

.modal {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: none;
}

.modal.is-open {
    display: block;
}

.modal__overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.modal__container {
    background-color: var(--card-bg);
    padding: 0;
    max-width: 960px;
    width: 92%;
    height: 85vh;
    border-radius: 8px;
    overflow-y: auto;
    box-sizing: border-box;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
}
.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 0.75rem 30px;
    border-bottom: 1px solid var(--border-color);
    border-radius: 8px 8px 0 0;
    position: sticky;
    top: 0;
    z-index: 1;
    flex-shrink: 0;
}
.modal__title {
    margin: 0;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--header-text);
}
.modal__close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--header-text);
    padding: 0;
    line-height: 1;
    opacity: 0.7;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal__close svg {
    pointer-events: none;
}

.modal__close:hover {
    opacity: 1;
}
.modal__content {
    padding: 0.5rem 20px 1.5rem;
    line-height: 1.7;
    flex: 1;
}

.modal__content > *:first-child {
    margin-top: 0 !important;
}

/* Markdown rendered content */
.modal__content h1,
.modal__content h2,
.modal__content h3,
.modal__content h4,
.modal__content h5,
.modal__content h6 {
    margin-top: 1.2em;
    margin-bottom: 0.6em;
    color: var(--text-color);
    scroll-margin-top: 80px;
}

.modal__content h1 {
    font-size: 1.6rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3rem;
    text-align: center;
}

.modal__content h2 {
    font-size: 1.35rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.25rem;
}

.modal__content h3 {
    font-size: 1.15rem;
}

.modal__content p {
    margin: 0.8em 0;
}

.modal__content ul,
.modal__content ol {
    padding-left: 2em;
    margin: 0.6em 0;
}

.modal__content li {
    margin: 0.3em 0;
}

.modal__content blockquote {
    border-left: 4px solid var(--accent-color);
    margin: 0.8em 0;
    padding: 0.5em 1em;
    background: var(--bg-color);
    border-radius: 4px;
}

.modal__content code {
    background: var(--bg-color);
    padding: 0.15em 0.4em;
    border-radius: 3px;
    font-size: 0.9em;
}

.modal__content pre {
    background: var(--bg-color);
    padding: 1em;
    border-radius: 6px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

.modal__content pre code {
    background: none;
    padding: 0;
    font-size: 0.85em;
}

.modal__content table {
    border-collapse: collapse;
    width: 100%;
    margin: 0.8em 0;
}

.modal__content th,
.modal__content td {
    border: 1px solid var(--border-color);
    padding: 0.5em 0.75em;
    text-align: left;
}

.modal__content th {
    background: var(--bg-color);
    font-weight: 600;
}

.modal__content a {
    color: var(--accent-color);
    text-decoration: none;
}

.modal__content a:hover {
    text-decoration: underline;
}

.modal__content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1.5em 0;
}

.modal__content img {
    max-width: 100%;
    border-radius: 4px;
}
.modal__footer {
    display: none;
    justify-content: flex-end;
    border-top: 1px solid var(--border-color);
    padding-top: 0.75rem;
    flex-shrink: 0;
}

.modal__btn {
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 8px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
}

.modal__btn:hover {
    filter: brightness(1.15);
}

/* Spinner */
.modal-spinner {
    width: 40px;
    height: 40px;
    margin: 80px auto;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: modal-spin 0.8s linear infinite;
}

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

/* Description button for presets */
.btn-description {
    background-color: #2d6a9f;
}

/* Deep-link highlight animation */
@keyframes card-highlight-pulse {
    0%   { box-shadow: 0 0 0 0 rgba(61, 161, 89, 0.6); }
    25%  { box-shadow: 0 0 12px 4px rgba(61, 161, 89, 0.5); }
    50%  { box-shadow: 0 0 0 0 rgba(61, 161, 89, 0.3); }
    75%  { box-shadow: 0 0 12px 4px rgba(61, 161, 89, 0.5); }
    100% { box-shadow: 0 0 0 0 rgba(61, 161, 89, 0); }
}

.card-highlight {
    animation: card-highlight-pulse 1.6s ease-in-out;
    border-color: var(--accent-color) !important;
}