:root {
    --bg: #0f1117;
    --bg-card: #1a1d27;
    --bg-card-hover: #1f2335;
    --bg-input: #12151f;
    --border: #2a2d3e;
    --border-focus: #5865f2;
    --text: #e2e8f0;
    --text-muted: #8892a4;
    --text-dim: #4a5568;
    --primary: #5865f2;
    --primary-hover: #4752c4;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --success: #22c55e;

    --cat-tip: #3b82f6;
    --cat-guide: #22c55e;
    --cat-strategy: #f97316;
    --cat-walkthrough: #a855f7;

    --avatar-1: #5865f2;
    --avatar-2: #ec4899;
    --avatar-3: #f97316;

    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

/* ── Navbar ── */
.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}
.nav-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text);
}
.nav-icon { font-size: 1.4rem; }
.nav-right { display: flex; align-items: center; gap: 1rem; }

/* ── User Selector ── */
.user-selector { position: relative; display: flex; align-items: center; gap: 0.5rem; }
.user-label { color: var(--text-muted); font-size: 0.85rem; }
.user-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: var(--radius-sm);
    padding: 0.3rem 0.7rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: border-color 0.2s;
}
.user-btn:hover { border-color: var(--primary); }
.chevron { font-size: 0.7rem; color: var(--text-muted); }
.user-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    min-width: 160px;
    overflow: hidden;
    z-index: 200;
}
.user-dropdown.open { display: block; }
.user-option {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    padding: 0.6rem 1rem;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    font-size: 0.9rem;
    text-align: left;
    transition: background 0.15s;
}
.user-option:hover { background: var(--bg-card-hover); }

/* ── User Avatars ── */
.user-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}
.user-avatar-sm { width: 22px; height: 22px; font-size: 0.7rem; }
.avatar-1 { background: var(--avatar-1); color: #fff; }
.avatar-2 { background: var(--avatar-2); color: #fff; }
.avatar-3 { background: var(--avatar-3); color: #fff; }

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1.2rem;
    border-radius: var(--radius-sm);
    border: none;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-secondary { background: var(--bg-input); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--text-muted); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-danger-outline { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger-outline:hover { background: var(--danger); color: #fff; }
.btn-sm { padding: 0.35rem 0.8rem; font-size: 0.8rem; }

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 0.25rem 0.4rem;
    border-radius: var(--radius-sm);
    transition: background 0.15s;
    color: inherit;
    line-height: 1;
}
.btn-icon:hover { background: var(--border); }
.btn-icon-danger:hover { background: rgba(239,68,68,0.15); }

/* ── Main Content ── */
.main-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ── Page Header ── */
.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}
.page-title { font-size: 1.8rem; font-weight: 800; margin-bottom: 0.2rem; }
.page-subtitle { color: var(--text-muted); font-size: 0.95rem; }
.page-actions { display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap; }
.page-title-row { display: flex; align-items: center; gap: 0.8rem; margin: 0.5rem 0; }
.breadcrumb-area { display: flex; flex-direction: column; gap: 0.3rem; }
.breadcrumb-link { color: var(--text-muted); font-size: 0.9rem; transition: color 0.2s; }
.breadcrumb-link:hover { color: var(--primary); }

/* ── Search ── */
.search-bar { margin-bottom: 1.5rem; }
.search-input {
    width: 100%;
    max-width: 440px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 0.65rem 1rem;
    font-size: 0.95rem;
    transition: border-color 0.2s;
    outline: none;
}
.search-input:focus { border-color: var(--primary); }
.search-input::placeholder { color: var(--text-muted); }

/* ── Games Grid ── */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
}
.game-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    transition: all 0.2s;
    cursor: pointer;
}
.game-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.game-card-header { display: flex; align-items: center; justify-content: space-between; }
.game-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}
.game-icon-lg {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}
.game-card-body { flex: 1; }
.game-name { font-size: 1.1rem; font-weight: 700; }
.game-desc { color: var(--text-muted); font-size: 0.85rem; margin-top: 0.3rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.game-description-full { color: var(--text-muted); font-size: 0.9rem; margin-top: 0.2rem; }
.game-card-footer { border-top: 1px solid var(--border); padding-top: 0.6rem; }
.tip-count { color: var(--text-muted); font-size: 0.85rem; }
.tip-count-num { font-weight: 700; color: var(--primary); font-size: 1rem; }

/* ── Platform Badge ── */
.platform-badge {
    background: rgba(88,101,242,0.15);
    color: var(--primary);
    border: 1px solid rgba(88,101,242,0.3);
    border-radius: 20px;
    padding: 0.15rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ── Filter Bar ── */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}
.filter-label { color: var(--text-muted); font-size: 0.85rem; margin-right: 0.3rem; }
.filter-chip {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    font-size: 0.85rem;
    transition: all 0.2s;
    color: var(--text-muted);
}
.filter-chip:hover { border-color: var(--primary); color: var(--text); }
.filter-chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ── Tips List ── */
.tips-list { display: flex; flex-direction: column; gap: 0.9rem; }
.tip-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem;
    border-left: 4px solid var(--border);
    transition: border-color 0.2s;
}
.tip-card:hover { border-color: var(--border-focus); }
.tip-card.category-tip { border-left-color: var(--cat-tip); }
.tip-card.category-guide { border-left-color: var(--cat-guide); }
.tip-card.category-strategy { border-left-color: var(--cat-strategy); }
.tip-card.category-walkthrough { border-left-color: var(--cat-walkthrough); }

.tip-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
}
.tip-meta-left { display: flex; align-items: center; gap: 0.5rem; }
.tip-author { font-weight: 600; font-size: 0.9rem; }
.tip-actions { display: flex; align-items: center; gap: 0.2rem; }
.tip-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.tip-content { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; }
.tip-footer {
    display: flex;
    gap: 1rem;
    margin-top: 0.8rem;
    padding-top: 0.6rem;
    border-top: 1px solid var(--border);
}
.tip-date, .tip-updated { color: var(--text-dim); font-size: 0.78rem; }

/* ── Category Badge ── */
.tip-category-badge {
    padding: 0.1rem 0.5rem;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.badge-tip { background: rgba(59,130,246,0.15); color: var(--cat-tip); }
.badge-guide { background: rgba(34,197,94,0.15); color: var(--cat-guide); }
.badge-strategy { background: rgba(249,115,22,0.15); color: var(--cat-strategy); }
.badge-walkthrough { background: rgba(168,85,247,0.15); color: var(--cat-walkthrough); }

/* ── Forms ── */
.form-page { max-width: 640px; }
.form-header { margin-bottom: 1.5rem; }
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.form-card { padding: 1.8rem; }
.form-group { margin-bottom: 1.4rem; }
.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text);
}
.required { color: var(--danger); }
.optional { color: var(--text-muted); font-weight: 400; font-size: 0.82rem; }
.form-input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 0.65rem 0.9rem;
    font-size: 0.95rem;
    transition: border-color 0.2s;
    outline: none;
    font-family: inherit;
}
.form-input:focus { border-color: var(--primary); }
.form-input::placeholder { color: var(--text-dim); }
.form-textarea { resize: vertical; }
.form-textarea-lg { min-height: 180px; }
.form-actions { display: flex; gap: 0.7rem; justify-content: flex-end; margin-top: 0.5rem; }

/* ── User Picker ── */
.user-picker { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.user-pick-option { cursor: pointer; }
.user-pick-radio { display: none; }
.user-pick-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-input);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.15s;
    cursor: pointer;
}
.user-pick-radio:checked + .user-pick-label {
    border-color: var(--primary);
    background: rgba(88,101,242,0.1);
    color: var(--text);
}
.user-pick-label:hover { border-color: var(--text-muted); }

/* ── Category Picker ── */
.category-picker { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.category-option { cursor: pointer; }
.category-radio { display: none; }
.category-label {
    display: block;
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    border: 2px solid var(--border);
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.15s;
    cursor: pointer;
    color: var(--text-muted);
}
.category-label:hover { color: var(--text); border-color: var(--text-muted); }
.category-opt-tip .category-radio:checked + .category-label { background: rgba(59,130,246,0.15); border-color: var(--cat-tip); color: var(--cat-tip); }
.category-opt-guide .category-radio:checked + .category-label { background: rgba(34,197,94,0.15); border-color: var(--cat-guide); color: var(--cat-guide); }
.category-opt-strategy .category-radio:checked + .category-label { background: rgba(249,115,22,0.15); border-color: var(--cat-strategy); color: var(--cat-strategy); }
.category-opt-walkthrough .category-radio:checked + .category-label { background: rgba(168,85,247,0.15); border-color: var(--cat-walkthrough); color: var(--cat-walkthrough); }

/* ── Empty State ── */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}
.empty-icon { font-size: 3.5rem; margin-bottom: 1rem; }
.empty-state h2 { font-size: 1.3rem; color: var(--text); margin-bottom: 0.5rem; }
.empty-state p { margin-bottom: 1.5rem; }
.hidden { display: none; }

/* ── Editor Toolbar ── */
.editor-toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.7rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-bottom: none;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}
.editor-toolbar + .editor-textarea {
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}
.toolbar-btn {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: var(--radius-sm);
    padding: 0.2rem 0.65rem;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}
.toolbar-btn:hover { border-color: var(--primary); color: var(--primary); }
.toolbar-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.toolbar-hint { color: var(--text-dim); font-size: 0.73rem; margin-left: auto; }

.editor-textarea.drag-over {
    border-color: var(--primary);
    background: rgba(88,101,242,0.06);
}

.upload-progress {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    margin-top: 0.4rem;
    padding: 0.4rem 0.7rem;
    background: rgba(88,101,242,0.08);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(88,101,242,0.2);
}
.upload-bar {
    width: 28px;
    height: 28px;
    border: 3px solid rgba(88,101,242,0.3);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.upload-label { font-size: 0.82rem; color: var(--text-muted); }

/* ── Tip Content (Markdown) ── */
.tip-content { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; }
.tip-content p { margin-bottom: 0.5rem; }
.tip-content p:last-child { margin-bottom: 0; }
.tip-content strong { color: var(--text); font-weight: 700; }
.tip-content em { color: var(--text); }
.tip-content ul, .tip-content ol { padding-left: 1.4rem; margin-bottom: 0.5rem; }
.tip-content li { margin-bottom: 0.2rem; }
.tip-content code {
    background: var(--bg-input);
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.82em;
    color: var(--cat-tip);
}
.tip-content img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    margin: 0.6rem 0;
    display: block;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: border-color 0.2s;
}
.tip-content img:hover { border-color: var(--primary); }

/* ── Lightbox ── */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.88);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img {
    max-width: 92vw;
    max-height: 88vh;
    border-radius: var(--radius);
    box-shadow: 0 8px 48px rgba(0,0,0,0.7);
    cursor: default;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .nav-content { padding: 0 1rem; }
    .main-content { padding: 1.2rem 1rem; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .games-grid { grid-template-columns: 1fr; }
    .page-title { font-size: 1.4rem; }
    .user-label { display: none; }
    .form-actions { flex-direction: column-reverse; }
    .form-actions .btn { width: 100%; justify-content: center; }
}