:root {
    --accent-primary: #4a9eff;
    --accent-secondary: #357abd;
    --bg-dark: #1a1a1a;
    --bg-card: #2a2a2a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --border-color: #3a3a3a;
    --card-shadow: none;
    --radius-sm: 4px; /* 4 / 6 / 8 */
    --radius-md: 6px; /* 6 / 8 / 12 */
    --radius-lg: 12px; /* 12 / 16 / 20 */
}

[data-theme="light"] {
    --accent-primary: #2563eb;
    --accent-secondary: #1d4ed8;
    --bg-dark: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    padding-bottom: 120px;
}

header {
    text-align: center;
    padding: 3rem 0;
    border-bottom: none;
    margin-bottom: 3rem;
    position: relative;
}

.header-separator {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    width: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        color-mix(in srgb, var(--accent-primary) 60%, transparent) 40%,
        var(--accent-primary) 50%,
        color-mix(in srgb, var(--accent-primary) 60%, transparent) 60%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 5s linear infinite;
    opacity: 0.9;
    border-radius: 1px;
}

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

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.tech-stack {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 1.2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.tech-stack .label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-right: 0.2rem;
}

.tech-stack a {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.8rem;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.tech-stack a:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.4rem 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    gap: 0.4rem;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    background: rgba(74, 158, 255, 0.1);
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.theme-toggle:hover svg {
    color: var(--accent-primary);
}

.theme-toggle .sun-icon {
    display: none;
}

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

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

.section {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2rem;
}

.section:last-of-type {
    border-bottom: none;
}

.section-title {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    color: inherit;
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.tool-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.tool-card h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin: 0;
}

.tool-card-github {
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.tool-card-github:hover {
    color: var(--accent-primary);
}

.tool-card-github svg {
    width: 20px;
    height: 20px;
}

.version-tag {
    font-size: 0.7rem;
    font-weight: 500;
    padding: 0.15rem 0.4rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.tool-link-stable .version-tag {
    background: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.tool-link-dev .version-tag {
    background: rgba(74, 158, 255, 0.15);
    color: var(--accent-primary);
    border: 1px solid rgba(74, 158, 255, 0.3);
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.tool-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 1rem;
}

@media (max-width: 450px) {
    .tool-links {
        grid-template-columns: 1fr;
    }
}

.tool-links a {
    padding: 0.6rem 1rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tool-links a.tool-link-stable {
    background: var(--accent-primary);
    color: white;
}

.tool-links a.tool-link-stable:hover {
    background: var(--accent-secondary);
}

.tool-links a.tool-link-dev {
    background: rgba(74, 158, 255, 0.2);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.tool-links a.tool-link-dev:hover {
    background: rgba(74, 158, 255, 0.3);
    border-color: var(--accent-secondary);
}

.tool-links a.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.tool-links a.tool-link-stable.disabled {
    pointer-events: auto;
}

.tool-links a.tool-link-stable.disabled:hover {
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.6);
    transform: none;
    background: var(--accent-primary);
}

.tool-links a.tool-link-dev.disabled {
    pointer-events: auto;
}

.tool-links a.tool-link-dev.disabled:hover {
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.6);
    transform: none;
    background: rgba(74, 158, 255, 0.2);
}

.footer-center {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    justify-content: center;
}

.copyright {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-separator {
    color: var(--text-secondary);
    opacity: 0.4;
    user-select: none;
}

.social-link {
    background: transparent;
    padding: 0;
    border-radius: 0;
    text-decoration: none;
    color: var(--text-secondary);
    border: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.9rem;
}

.social-link:hover {
    color: var(--accent-primary);
    background: transparent;
}

.social-link svg {
    width: 16px;
    height: 16px;
}

.blog-post {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.blog-post:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.blog-post h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.blog-date {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.8rem;
}

.blog-post-content {
    display: flex;
    gap: 1.5rem;
    align-items: start;
}

.blog-post-content p {
    flex: 1;
    margin: 0;
}

.blog-post-image {
    width: 600px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.blog-post-text {
    flex: 1;
}

.blog-post-text p:first-of-type ~ p {
    text-indent: 1.5em; /* or use 1.5rem, 20px, etc. */
}

@media (max-width: 1050px) {
    .blog-post-content {
        flex-direction: column;
    }

    .blog-post-image {
        width: 100%;
    }
}

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    background: var(--bg-dark);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.footer-content {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
    max-width: 1200px;
    padding: 0 2rem;
    position: relative;
    margin: 0 auto;
}


.footer-buttons {
    position: absolute;
    display: flex;
    gap: 0.5rem;
}

.footer-buttons-left {
    left: 2rem;
}

.footer-buttons-right {
    right: 2rem;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.modal h2 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.modal p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.modal-button {
    background: var(--accent-primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
    width: 100%;
    margin-top: 1rem;
}

.modal-button:hover {
    background: var(--accent-secondary);
}

@media (max-width: 768px) {
    .footer-content {
        padding: 0 1rem;
    }
    .footer-center {
        gap: 0.5rem;
    }
}