/* Edna's Python Archives — dark, elegant, slightly judgmental */

:root {
    --bg-deep: #141018;
    --bg-plum: #1a1422;
    --card-bg: #22202a;
    --card-border: #3d3548;
    --text-main: #e8e4ef;
    --text-muted: #9a92a8;
    --accent-green: #39ff8c;
    --accent-purple: #9b7ed9;
    --accent-red: #e85c5c;
    --shadow: rgba(0, 0, 0, 0.45);
    --radius: 12px;
    --font-sans: "Segoe UI", system-ui, sans-serif;
    --font-mono: "Consolas", "Courier New", monospace;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 100%;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-sans);
    color: var(--text-main);
    background: linear-gradient(165deg, var(--bg-deep) 0%, var(--bg-plum) 50%, #0f0c14 100%);
    background-attachment: fixed;
    line-height: 1.55;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Header */

.site-header {
    padding: 1.5rem 1.25rem 2rem;
    max-width: 42rem;
    margin: 0 auto;
    text-align: center;
}

.site-title {
    margin: 0 0 0.35rem;
    font-size: clamp(1.5rem, 5vw, 2rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text-main);
}

.site-title::after {
    content: "";
    display: block;
    width: 3rem;
    height: 3px;
    margin: 0.75rem auto 0;
    background: linear-gradient(90deg, var(--accent-green), var(--accent-purple));
    border-radius: 2px;
}

.site-subtitle {
    margin: 0 0 1.75rem;
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Search */

.search-form {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    max-width: 28rem;
    margin: 0 auto;
}

@media (min-width: 480px) {
    .search-form {
        flex-direction: row;
        align-items: stretch;
        max-width: 36rem;
    }
}

.search-input {
    flex: 1;
    padding: 0.65rem 0.9rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-main);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-input:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 2px rgba(57, 255, 140, 0.2);
}

.search-button {
    padding: 0.65rem 1.25rem;
    font-size: 1rem;
    font-family: inherit;
    font-weight: 600;
    color: #0a0a0c;
    background: var(--accent-green);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: transform 0.12s ease, filter 0.12s ease;
}

.search-button:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
}

.search-button:active {
    transform: translateY(0);
}

/* Warm-up (random term / random 3) */

.warmup-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.5rem 0.65rem;
    margin-top: 1.25rem;
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}

.warmup-link {
    display: inline-block;
    padding: 0.45rem 0.85rem;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--accent-green);
    background: rgba(57, 255, 140, 0.08);
    border: 1px solid rgba(57, 255, 140, 0.35);
    border-radius: 999px;
    transition: background 0.15s ease, transform 0.12s ease;
}

.warmup-link:hover {
    background: rgba(57, 255, 140, 0.14);
    transform: translateY(-1px);
}

.warmup-link--quiet {
    color: var(--text-muted);
    font-weight: 500;
    background: transparent;
    border-color: var(--card-border);
}

.warmup-link--quiet:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
}

.warmup-banner {
    margin: 0 0 1.25rem;
    padding: 0.65rem 1rem;
    font-size: 0.92rem;
    text-align: center;
    color: var(--accent-purple);
    background: rgba(155, 126, 217, 0.1);
    border: 1px solid rgba(155, 126, 217, 0.3);
    border-radius: var(--radius);
}

/* Main */

.main-content {
    padding: 0 1rem 3rem;
    max-width: 42rem;
    margin: 0 auto;
}

.card-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* Cards */

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.25rem 1.15rem;
    box-shadow: 0 8px 24px var(--shadow);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

@media (min-width: 600px) {
    .card {
        padding: 1.5rem 1.4rem;
    }
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px var(--shadow);
}

.card-header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.5rem 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid rgba(155, 126, 217, 0.25);
}

.card-term {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--accent-green);
    letter-spacing: 0.01em;
}

.card-topic {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent-purple);
    background: rgba(155, 126, 217, 0.12);
    border: 1px solid rgba(155, 126, 217, 0.35);
    border-radius: 999px;
}

.card-section {
    margin-bottom: 1rem;
}

.card-section:last-child {
    margin-bottom: 0;
}

.card-heading {
    margin: 0 0 0.35rem;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
}

.card-text {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-main);
}

/* Terminal-style code */

.code-block {
    margin: 0;
    padding: 0.85rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.5;
    color: #c8f5dc;
    background: #0d0d12;
    border: 1px solid #2a2833;
    border-left: 3px solid var(--accent-green);
    border-radius: 8px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

.code-block code {
    font-family: inherit;
}

/* Empty state */

.empty-state {
    margin: 2rem 0;
    padding: 1.5rem 1.25rem;
    text-align: center;
    font-size: 1.05rem;
    color: var(--text-muted);
    background: rgba(155, 126, 217, 0.08);
    border: 1px dashed rgba(155, 126, 217, 0.35);
    border-radius: var(--radius);
}

/* Footer */

.site-footer {
    padding: 2rem 1rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.site-footer p {
    margin: 0;
}