:root {
    --bg-main: #e2e8f0;            /* Light/mid grey background */
    --bg-card: #fcfcf8;            /* Crisp light card background */
    --bg-card-hover: #ffffff;      /* Bright white on hover */
    --border-color: #0f172a;       /* Solid dark border */
    --shadow-color: #facc15;       /* Vibrant pop-art yellow shadow */
    --text-primary: #0f172a;       /* Deep dark blue/black for text */
    --text-secondary: #475569;     /* Slate grey for dates/subtexts */
    --accent-yellow: #facc15;      /* Accent yellow */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 3rem 1.5rem;
    max-width: 1240px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

#blog-container {
    width: 100%;
    max-width: 1100px;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.blog-post {
    background: var(--bg-card);
    border: 3px solid var(--border-color);
    border-radius: 0px;
    padding: 2rem;
    cursor: pointer;
    box-shadow: 6px 6px 0px var(--shadow-color);
    transition: transform 0.1s ease, box-shadow 0.10s ease, background 0.10s ease;
}

.blog-post:hover {
    background: var(--bg-card-hover);
    transform: translate(-2px, -2px);
    box-shadow: 9px 9px 0px var(--shadow-color);
}

.blog-post:active {
    transform: translate(2px, 2px);
    box-shadow: 4px 4px 0px var(--shadow-color);
}

.blog-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.blog-date {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.blog-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.blog-tag {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    border: 2px solid var(--border-color);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.blog-tag-long-text {
    background: #bfdbfe;
}

.blog-tag-gravel {
    background: #bbf7d0;
}

.blog-tag-not-that-long {
    background: #fbcfe8;
}

.blog-tag-announcement {
    background: #c6ffa9;
}

.back-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    align-self: flex-start;
    cursor: pointer;
    background: var(--accent-yellow);
    border: 2px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    box-shadow: 3px 3px 0px var(--border-color);
    transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.back-link:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0px var(--border-color);
}

.blog-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.blog-actions .back-link {
    margin-bottom: 0;
}

.share-button {
    color: var(--text-primary);
    font: inherit;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    background: #bfdbfe;
    border: 2px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    box-shadow: 3px 3px 0px var(--border-color);
    transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease;
}

.share-button:hover {
    background: #93c5fd;
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0px var(--border-color);
}

.share-button:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--border-color);
}

.share-button:focus-visible {
    outline: 3px solid #2563eb;
    outline-offset: 3px;
}

.share-status {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 700;
}

.iframe-wrapper {
    width: 100%;
    border-radius: 0px;
    border: 3px solid var(--border-color);
    box-shadow: 8px 8px 0px var(--shadow-color);
    background: var(--border-color);
}

iframe {
    width: 100%;
    height: 75vh;
    border: none;
    border-radius: 0px;
    display: block;
    background: #ffffff;
}

details {
    background: var(--bg-card);
    border: 3px solid var(--border-color);
    box-shadow: 5px 5px 0px var(--border-color);
    margin-top: 1rem;
    transition: transform 0.1s ease, box-shadow 0.1s ease;
}

details[open] {
    transform: translate(2px, 2px);
    box-shadow: 3px 3px 0px var(--border-color);
}

summary {
    padding: 1rem;
    font-weight: 800;
    font-size: 1.1rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid transparent;
    background: var(--bg-card);
    transition: background 0.1s ease;
}

summary::-webkit-details-marker {
    display: none;
}

summary:hover {
    background: var(--accent-yellow);
}

details[open] summary {
    border-bottom: 3px solid var(--border-color);
    background: var(--bg-card-hover);
}

summary::after {
    content: '+';
    font-size: 1.3rem;
    font-weight: 900;
    background: var(--bg-card-hover);
    border: 2px solid var(--border-color);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 2px 2px 0px var(--border-color);
}

summary:hover::after {
    background: #ffffff;
}

details[open] summary::after {
    content: '−';
    background: var(--accent-yellow);
}

.details-content {
    padding: 1.25rem;
    background: #ffffff;
    font-size: 1rem;
    color: var(--text-primary);
}

#search-container {
    width: 100%;
    max-width: 1100px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem;
    padding: 0.85rem 1rem;
    background: #fef3c7;
    border: 3px solid var(--border-color);
    box-shadow: 6px 6px 0 var(--shadow-color);
}

#search-container[hidden] {
    display: none;
}

#search-container h2 {
    font-size: 1.05rem;
    line-height: 1.3;
    font-weight: 850;
    white-space: nowrap;
}

#search-input {
    flex: 1 1 180px;
    width: auto;
    min-width: 0;
    padding: 0.65rem 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0;
    background: #ffffff;
    color: var(--text-primary);
    font: inherit;
}

#search-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

#search-input:focus-visible,
#search-container button:focus-visible {
    outline: 3px solid #2563eb;
    outline-offset: 3px;
}

#search-container button {
    min-height: 40px;
    padding: 0.45rem 0.65rem;
    border: 2px solid var(--border-color);
    border-radius: 0;
    color: var(--text-primary);
    font: inherit;
    font-size: 0.9rem;
    font-weight: 750;
    cursor: pointer;
    box-shadow: 3px 3px 0 var(--border-color);
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}

#search-button {
    background: var(--accent-yellow);
}

#search-button:hover {
    background: #fde047;
}

#reset-view {
    background: #ffffff;
}

#reset-view:hover {
    background: #e2e8f0;
}

#search-container button:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--border-color);
}

#random-post-container {
    margin-left: auto;
}

#random-post {
    background: #bfdbfe;
}

#search-container #random-post:hover {
    background: #93c5fd;
}

@media (max-width: 800px) {
    body {
        gap: 1.5rem;
        padding: 1.5rem 1rem;
    }

    #search-container {
        position: static;
        gap: 0.6rem;
    }

    #search-container h2 {
        flex: 1 1 100%;
        font-size: 1.1rem;
    }

    #blog-container {
        max-width: none;
    }
}

@media (max-width: 420px) {
    #search-container {
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }

    #search-input,
    #search-container h2 {
        grid-column: 1 / -1;
    }

    #search-container button {
        width: 100%;
    }

    #random-post-container {
        grid-column: 1 / -1;
        width: 100%;
        margin-left: 0;
    }

    .blog-post {
        padding: 1.25rem;
    }

    .blog-title {
        font-size: 1.4rem;
    }
}