:root {
    --color-bg: #f7f8fa;
    --color-surface: #ffffff;
    --color-text: #1c1f26;
    --color-text-muted: #62697a;
    --color-border: #e3e6eb;
    --color-primary: #3b5bfd;
    --color-primary-dark: #2c46d0;
    --color-accent: #10b981;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(20, 22, 30, 0.08), 0 1px 2px rgba(20, 22, 30, 0.06);
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #12141a;
        --color-surface: #1b1e27;
        --color-text: #e9ebf0;
        --color-text-muted: #9aa1b2;
        --color-border: #2b2f3a;
        --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}

.main-nav { display: flex; gap: 20px; }
.main-nav a { color: var(--color-text-muted); font-weight: 500; text-decoration: none; }
.main-nav a.active, .main-nav a:hover { color: var(--color-primary); }

main.container { padding-top: 32px; padding-bottom: 60px; min-height: 60vh; }

h1 { font-size: 1.9rem; margin-bottom: 8px; }
h2 { font-size: 1.4rem; }
.page-subtitle { color: var(--color-text-muted); margin-top: 0; }

/* App grid */
.app-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 24px;
}

@media (max-width: 860px) {
    .app-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
    .app-grid { grid-template-columns: 1fr; }
}

.app-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: transform 0.15s ease;
}

.app-card:hover { transform: translateY(-2px); }

.app-card-row { display: flex; align-items: center; gap: 10px; }
.app-card-row h3 { flex: 1; min-width: 0; }

.app-card .platform-icons { display: flex; gap: 8px; flex-shrink: 0; }
.platform-icon { width: 20px; height: 20px; fill: var(--color-text-muted); }

.app-card h3 { margin: 0; font-size: 1.15rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.app-card h3 a { color: var(--color-text); text-decoration: none; }
.app-card h3 a:hover { color: var(--color-primary); }

.inline-platform-icons { display: inline-flex; align-items: center; gap: 6px; }
.inline-platform-icons .platform-icon { width: 15px; height: 15px; }

.app-icon-img { display: block; border-radius: 22%; object-fit: cover; flex-shrink: 0; }
.app-card .app-icon-img { width: 32px; height: 32px; }
.app-icon-thumb { width: 32px; height: 32px; }
.app-icon-thumb-lg { width: 64px; height: 64px; }
.app-icon-preview { width: 64px; height: 64px; margin-top: 10px; }

.version-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.version-badge {
    display: inline-block;
    background: rgba(59, 91, 253, 0.1);
    color: var(--color-primary);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 999px;
    align-self: flex-start;
}

.empty-state {
    text-align: center;
    color: var(--color-text-muted);
    padding: 60px 20px;
}

/* App detail */
.app-detail-header { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 24px; }
.app-detail-header h1 { margin: 0; }
.app-detail-header .platform-icons { display: flex; align-items: center; gap: 10px; }
.app-detail-header .platform-icons .platform-icon { width: 22px; height: 22px; fill: var(--color-text-muted); }
.app-description { margin: 0 0 36px; font-size: 14px; line-height: 1.3; white-space: pre-line; }

/* Accordion */
.accordion { border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; background: var(--color-surface); }
.accordion-item + .accordion-item { border-top: 1px solid var(--color-border); }
.accordion-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font: inherit;
    color: var(--color-text);
    text-align: left;
}
.accordion-header:hover { background: rgba(59, 91, 253, 0.05); }
.accordion-header .version-tag { font-weight: 700; }
.accordion-header-right { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.accordion-header .version-date { color: var(--color-text-muted); font-size: 0.85rem; }
.accordion-header .chevron { transition: transform 0.2s ease; flex-shrink: 0; color: var(--color-text-muted); }
.accordion-item.open .chevron { transform: rotate(90deg); }
.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
    padding: 0 20px;
}
.accordion-item.open .accordion-body { padding: 0 20px 18px; }
.accordion-body .whats-new-label { font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--color-text-muted); margin-bottom: 6px; }
.latest-tag { background: var(--color-accent); color: #fff; font-size: 0.7rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; margin-left: 10px; text-transform: uppercase; }

/* Forms */
.form-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 28px;
    max-width: 560px;
    box-shadow: var(--shadow);
}
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.92rem; }
.form-group input[type=text],
.form-group input[type=email],
.form-group input[type=password],
.form-group input[type=date],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg);
    color: var(--color-text);
    font: inherit;
}
.form-group textarea { resize: vertical; min-height: 100px; }
.checkbox-group { display: flex; gap: 18px; flex-wrap: wrap; }
.checkbox-group label { display: flex; align-items: center; gap: 6px; font-weight: 500; }
.platform-row { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.platform-row label { display: flex; align-items: center; gap: 6px; font-weight: 500; flex: 0 0 110px; margin-bottom: 0; }
.platform-row input[type=text] { flex: 1; }
.form-hint { color: var(--color-text-muted); font-size: 0.82rem; margin-top: 4px; }

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    font: inherit;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { background: var(--color-primary-dark); text-decoration: none; }
.btn-secondary { background: var(--color-border); color: var(--color-text); }
.btn-danger { background: #e11d48; }
.btn-small { padding: 6px 12px; font-size: 0.85rem; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 20px; }
.alert-success { background: rgba(16, 185, 129, 0.12); color: #0d9668; }
.alert-error { background: rgba(225, 29, 72, 0.1); color: #e11d48; }

.legal-content h2 { margin-top: 32px; }
.legal-content { max-width: 760px; }

/* Admin */
.admin-header { background: #1c1f26; color: #fff; }
.admin-header .brand { color: #fff; }
.admin-header a { color: #cdd3e0; }
.admin-header a.active, .admin-header a:hover { color: #fff; }

.admin-table { width: 100%; border-collapse: collapse; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; }
.admin-table th, .admin-table td { padding: 12px 16px; border-bottom: 1px solid var(--color-border); text-align: left; font-size: 0.92rem; }
.admin-table th { background: var(--color-bg); font-weight: 700; }
.admin-table tr:last-child td { border-bottom: none; }
.actions-row { display: flex; gap: 8px; align-items: center; }

.page-header-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }

.versions-subtable { margin: 10px 0 24px 0; }

.app-detail-admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}
.app-detail-admin-title { display: flex; align-items: center; gap: 16px; }
.app-detail-admin-title h1 { margin: 0; display: flex; align-items: center; gap: 10px; }

.g-recaptcha { margin-bottom: 18px; }

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    margin-top: 40px;
    padding: 32px 0;
}
.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    text-align: center;
}
.footer-nav { display: flex; gap: 22px; flex-wrap: wrap; justify-content: center; }
.footer-nav a { color: var(--color-text-muted); font-weight: 500; text-decoration: none; }
.footer-nav a:hover { color: var(--color-primary); }
.footer-copyright { margin: 0; color: var(--color-text-muted); font-size: 0.85rem; }