:root {
    --bg: #111;
    --surface: #1b1b1b;
    --surface-strong: #262626;
    --text: #eee;
    --muted: #888;
    --placeholder: #666;
    --accent: #38d;
    --focus: #ffd400;
    --danger: #e66;
    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* {
    box-sizing: border-box;
}
[hidden] {
    display: none !important;
}
html, body {
    min-height: 100%;
}
body {
    font-family: var(--font);
    font-size: 100%;
    line-height: 1.5;
    background: var(--bg);
    color: var(--text);
}
a {
    color: var(--accent);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
}

/* Buttons */
.button {
    font: inherit;
    font-size: 1em;
    color: var(--text);
    background: var(--surface-strong);
    border: 0;
    padding: 0.5em 1em;
    cursor: pointer;
}
.button:hover {
    background: #333;
}
.button-primary {
    background: var(--accent);
    font-weight: 700;
}
.button-primary:hover {
    background: #49e;
}
.button-quiet {
    background: transparent;
    color: var(--muted);
}
.button-quiet:hover {
    background: var(--surface);
    color: var(--danger);
}

/* Deck list */
.deck-list {
    max-width: 48rem;
    margin: 0 auto;
    padding: 4rem 1rem;
}
.deck-list h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.2;
    border-bottom: 2px solid var(--accent);
    padding-bottom: 0.25em;
    margin-bottom: 0.75em;
}
.deck-list p {
    margin-bottom: 1.5em;
}
.notice {
    background: #3a2a00;
    color: #ffd98a;
    padding: 0.75em 1em;
}
.empty {
    color: var(--muted);
    margin-top: 2em;
}
.decks {
    margin-top: 2em;
}
.deck-item {
    display: flex;
    align-items: center;
    gap: 0.5em;
    border-top: 1px solid var(--surface-strong);
}
.deck-item:last-child {
    border-bottom: 1px solid var(--surface-strong);
}
.deck-link {
    flex: 1;
    min-width: 0;
    display: block;
    padding: 1em 0.5em;
    color: var(--text);
}
.deck-link:hover {
    text-decoration: none;
    background: var(--surface);
}
.deck-item-name {
    display: block;
    font-weight: 700;
    font-size: 1.2em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.deck-item-meta {
    display: block;
    color: var(--muted);
    font-size: 0.9em;
}

/* Deck editor */
.topbar {
    position: sticky;
    top: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 1em;
    padding: 0.75em 1rem;
    background: var(--bg);
    font-size: 0.9em;
}
.deck-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--muted);
}
.save-status {
    color: var(--muted);
    white-space: nowrap;
}
.save-status[data-state="error"] {
    color: var(--danger);
}
.slides {
    padding-bottom: 6rem;
}
.slide {
    max-width: 50rem;
    margin: 0 auto;
    padding: 3rem 1rem 0;
}
.slide-title,
.slide-content {
    display: block;
    width: 100%;
    font-family: var(--font);
    color: var(--text);
    background: transparent;
    border: 0;
    padding: 0.1em 0.2em;
}
.slide-title {
    font-size: clamp(1.75rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.3;
    color: var(--accent);
    border-bottom: 2px solid var(--accent);
    margin-bottom: 1em;
}
.slide-content {
    font-size: clamp(1.2rem, 2.5vw, 1.75rem);
    line-height: 1.5;
    resize: none;
    overflow: hidden;
    min-height: 6em;
}
.slide-title::placeholder,
.slide-content::placeholder {
    color: var(--placeholder);
    opacity: 1;
}
.slide-title:hover,
.slide-content:hover {
    background: var(--surface);
}
.slide-title:focus,
.slide-content:focus {
    background: var(--surface);
    outline: none;
}
.pager {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1em;
    padding: 0.75em 1rem;
    background: var(--bg);
    border-top: 1px solid var(--surface-strong);
}
.pager .button,
.slide-counter {
    white-space: nowrap;
}
.slide-counter {
    color: var(--muted);
}

@media (max-width: 30rem) {
    .deck-list {
        padding-top: 2rem;
    }
    .deck-list h1 {
        font-size: 1.8rem;
    }
    .slide {
        padding-top: 1.5rem;
    }
}