/* UBIEDU HUB subpage skin. Keep page layouts intact, align visuals with /index.php. */
:root {
    color-scheme: dark;
    --ubiedu-bg: #071426;
    --ubiedu-side: #09182b;
    --ubiedu-panel: rgba(9, 24, 43, 0.74);
    --ubiedu-panel-strong: rgba(7, 20, 38, 0.92);
    --ubiedu-panel-soft: rgba(255, 255, 255, 0.055);
    --ubiedu-line: rgba(125, 211, 252, 0.18);
    --ubiedu-line-strong: rgba(125, 211, 252, 0.34);
    --ubiedu-text: #f8fafc;
    --ubiedu-muted: #94a3b8;
    --ubiedu-blue: #38bdf8;
    --ubiedu-green: #4ade80;
    --ubiedu-yellow: #fbbf24;
    --ubiedu-red: #fb7185;
    --ubiedu-purple: #a855f7;
    --ubiedu-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
    --ubiedu-card-shadow: 0 18px 48px rgba(0, 0, 0, 0.24);

    --bg: var(--ubiedu-bg);
    --bg-color: var(--ubiedu-bg);
    --card: var(--ubiedu-panel);
    --paper: var(--ubiedu-panel);
    --panel: var(--ubiedu-panel);
    --panel-soft: var(--ubiedu-panel-soft);
    --surface: var(--ubiedu-panel);
    --surface-strong: var(--ubiedu-panel-strong);
    --surface-2: rgba(15, 38, 66, 0.74);
    --line: var(--ubiedu-line);
    --text: var(--ubiedu-text);
    --text-main: var(--ubiedu-text);
    --text-sub: var(--ubiedu-muted);
    --text-muted: var(--ubiedu-muted);
    --muted: var(--ubiedu-muted);
    --ink: var(--ubiedu-text);
    --shadow: var(--ubiedu-card-shadow);
    --shadow-dark: rgba(0, 0, 0, 0.38);
    --shadow-light: rgba(56, 189, 248, 0.08);
    --blue: var(--ubiedu-blue);
    --green: var(--ubiedu-green);
    --accent: var(--ubiedu-blue);
    --accent-2: var(--ubiedu-green);
    --cyan: var(--ubiedu-blue);
    --amber: var(--ubiedu-yellow);
    --yellow: var(--ubiedu-yellow);
    --red: var(--ubiedu-red);
    --danger: var(--ubiedu-red);
}

html {
    min-height: 100%;
    background: var(--ubiedu-bg) !important;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(circle at 10% 8%, rgba(56, 189, 248, 0.14), transparent 30%),
        radial-gradient(circle at 84% 4%, rgba(74, 222, 128, 0.10), transparent 28%),
        linear-gradient(180deg, rgba(7, 20, 38, 0.92), #071426 58%) !important;
    color: var(--ubiedu-text) !important;
    font-family: "Nanum Gothic", "Pretendard", "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(125, 211, 252, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(125, 211, 252, 0.035) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.70), transparent 86%);
}

* {
    letter-spacing: 0 !important;
}

a {
    color: inherit;
}

img,
iframe,
video,
canvas {
    max-width: 100%;
}

::selection {
    background: rgba(56, 189, 248, 0.36);
    color: #fff;
}

:focus-visible {
    outline: 3px solid rgba(56, 189, 248, 0.78);
    outline-offset: 3px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--ubiedu-text) !important;
}

p,
small,
.lead,
.page-lead,
.hint,
.updated,
.text-muted {
    color: var(--ubiedu-muted) !important;
}

.app-layout,
.app-shell,
.workspace-shell,
.shell,
.page,
.responsive-container,
#app-container {
    color: var(--ubiedu-text) !important;
}

.sidebar,
aside.sidebar {
    background:
        radial-gradient(circle at 18% 0%, rgba(56, 189, 248, 0.16), transparent 28%),
        radial-gradient(circle at 78% 14%, rgba(74, 222, 128, 0.10), transparent 30%),
        rgba(7, 20, 38, 0.88) !important;
    color: var(--ubiedu-text) !important;
    border-color: rgba(125, 211, 252, 0.16) !important;
    box-shadow: 18px 0 48px rgba(0, 0, 0, 0.34) !important;
}

.brand-mark,
.card-icon {
    border-radius: 14px !important;
    background: linear-gradient(135deg, var(--ubiedu-blue), var(--ubiedu-green)) !important;
    color: #031018 !important;
    box-shadow: 0 12px 26px rgba(56, 189, 248, 0.22) !important;
}

.brand-kicker,
.section-kicker,
.eyebrow,
.nav-group,
.card-meta,
.kicker {
    color: var(--ubiedu-yellow) !important;
    text-transform: uppercase;
}

.nav-list a,
.nav-btn,
.side-link,
.top-link,
.route-chip,
.keyword-badge,
.badge,
.pill,
.count,
.status-pill {
    border: 1px solid rgba(125, 211, 252, 0.16) !important;
    background: rgba(255, 255, 255, 0.06) !important;
    color: var(--ubiedu-text) !important;
    box-shadow: none !important;
}

.nav-list a:hover,
.nav-list a:focus,
.nav-list a[aria-current="page"],
.nav-list a.is-active,
.nav-btn:hover,
.nav-btn.active,
.side-link:hover,
.top-link:hover {
    border-color: rgba(56, 189, 248, 0.58) !important;
    background: rgba(255, 255, 255, 0.12) !important;
    color: #fff !important;
}

.main-card,
.panel,
.card,
.bento-card,
.glass-panel,
.content-area,
.hero-section,
.visual-section,
.page-hero,
.dashboard,
.section,
.stat-card,
.overview-card,
.topic-card,
.function-card,
.manual-card,
.tool-panel,
.curriculum-card,
.step-card,
.tip-box,
.expert-note,
.alert,
.alert-info,
.team-card,
.ip-card,
.timeline-row,
.process-row,
.source-link,
.controls-section,
.file-item,
.chat-wrap,
.video-box,
.modal-content,
.preview,
.missing-card,
.workspace-switcher,
.donut-node,
.center-node {
    border-color: var(--ubiedu-line) !important;
    background:
        linear-gradient(145deg, rgba(15, 38, 66, 0.76), rgba(9, 24, 43, 0.58)) !important;
    color: var(--ubiedu-text) !important;
    box-shadow: var(--ubiedu-card-shadow) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.content,
.main-content,
#home-view {
    background: transparent !important;
    color: var(--ubiedu-text) !important;
}

.header-section,
.header-bg,
.header-banner,
.hero,
.hero.hero-compact {
    background:
        linear-gradient(90deg, rgba(4, 10, 22, 0.96) 0%, rgba(8, 24, 43, 0.82) 45%, rgba(8, 24, 43, 0.38) 100%),
        url("/hub-assets/security-hero-gpt55.webp") center / cover no-repeat !important;
    color: var(--ubiedu-text) !important;
    border: 1px solid rgba(125, 211, 252, 0.26) !important;
    box-shadow: var(--ubiedu-shadow) !important;
}

.hero::after,
.header-section::after,
.header-bg::after,
.header-banner::after {
    background: linear-gradient(90deg, var(--ubiedu-blue), var(--ubiedu-green), var(--ubiedu-yellow)) !important;
}

.hero-visual,
.hero-pages,
.hero-side-stack,
.preview-head,
.donut-ring {
    border-color: var(--ubiedu-line) !important;
    background: rgba(3, 7, 18, 0.46) !important;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), var(--ubiedu-card-shadow) !important;
}

.primary-action,
.button-link.primary,
.btn-primary,
button:not(.accordion-button):not(.btn-close),
.btn:not(.btn-danger):not(.btn-outline-secondary),
.open,
.current-link,
.youtube-refresh-button,
.refresh-btn {
    border-color: transparent !important;
    background: linear-gradient(135deg, var(--ubiedu-blue), var(--ubiedu-green)) !important;
    color: #031018 !important;
    font-weight: 900 !important;
    box-shadow: 0 14px 30px rgba(56, 189, 248, 0.20) !important;
}

.secondary-action,
.button-link,
.copy,
.back,
.previous-toggle,
.previous-list a,
.btn-outline-secondary {
    border: 1px solid var(--ubiedu-line) !important;
    background: rgba(255, 255, 255, 0.07) !important;
    color: var(--ubiedu-text) !important;
    box-shadow: none !important;
}

.danger,
.remove,
.btn-danger {
    border-color: rgba(251, 113, 133, 0.42) !important;
    background: rgba(251, 113, 133, 0.14) !important;
    color: #fecdd3 !important;
}

input:not([type="checkbox"]):not([type="radio"]),
textarea,
select,
.form-control,
.form-select {
    border: 1px solid var(--ubiedu-line) !important;
    background: rgba(3, 7, 18, 0.48) !important;
    color: var(--ubiedu-text) !important;
    box-shadow: none !important;
}

input::placeholder,
textarea::placeholder {
    color: rgba(148, 163, 184, 0.78) !important;
}

input:focus,
textarea:focus,
select:focus,
.form-control:focus,
.form-select:focus {
    border-color: rgba(56, 189, 248, 0.72) !important;
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.14) !important;
}

.table,
table {
    color: var(--ubiedu-text) !important;
    border-color: var(--ubiedu-line) !important;
}

.table > :not(caption) > * > *,
table th,
table td {
    border-color: rgba(125, 211, 252, 0.14) !important;
    background: rgba(9, 24, 43, 0.50) !important;
    color: var(--ubiedu-text) !important;
}

.table-hover tbody tr:hover > *,
tbody tr:hover > * {
    background: rgba(56, 189, 248, 0.10) !important;
}

.nav-pills .nav-link,
.accordion-button {
    border: 1px solid var(--ubiedu-line) !important;
    background: rgba(255, 255, 255, 0.06) !important;
    color: var(--ubiedu-text) !important;
}

.nav-pills .nav-link.active,
.accordion-button:not(.collapsed) {
    border-color: rgba(56, 189, 248, 0.56) !important;
    background: rgba(56, 189, 248, 0.16) !important;
    color: #fff !important;
}

.accordion-item,
.accordion-body,
.list-group-item {
    background: transparent !important;
    color: var(--ubiedu-text) !important;
    border-color: var(--ubiedu-line) !important;
}

.source-file-list a,
.channel-link,
.team-url,
code {
    color: #b7f7df !important;
}

code,
pre {
    background: rgba(56, 189, 248, 0.10) !important;
    border-color: rgba(56, 189, 248, 0.22) !important;
}

.status .ok,
.notice.success,
.download-badge.success {
    color: #bbf7d0 !important;
    background: rgba(74, 222, 128, 0.14) !important;
    border-color: rgba(74, 222, 128, 0.38) !important;
}

.status .err,
.notice.error,
.download-badge.error {
    color: #fecdd3 !important;
    background: rgba(251, 113, 133, 0.14) !important;
    border-color: rgba(251, 113, 133, 0.42) !important;
}

@media (max-width: 900px) {
    .app-layout,
    .app-shell {
        grid-template-columns: 1fr !important;
    }

    .sidebar,
    aside.sidebar {
        position: relative !important;
        width: 100% !important;
        height: auto !important;
        min-height: 0 !important;
    }
}