* {
    box-sizing: border-box;
}

:root {
    --bg: #07111f;
    --panel: rgba(15, 23, 42, 0.78);
    --panel-strong: rgba(15, 23, 42, 0.94);
    --border: rgba(148, 163, 184, 0.24);
    --text: #e5e7eb;
    --muted: #94a3b8;
    --blue: #3b82f6;
    --blue-light: #93c5fd;
    --green: #22c55e;
    --white: #ffffff;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.35), transparent 35%),
        radial-gradient(circle at bottom right, rgba(34, 197, 94, 0.16), transparent 32%),
        linear-gradient(135deg, #020617 0%, #0f172a 48%, #111827 100%);
    color: var(--text);
    min-height: 100vh;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(2, 6, 23, 0.82);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    color: var(--white);
    text-decoration: none;
    font-weight: 850;
    letter-spacing: -0.5px;
    font-size: 19px;
}

.nav {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.nav a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 14px;
    font-weight: 650;
}

.nav a:hover {
    color: var(--blue-light);
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 44px 24px 70px;
}

.hero {
    display: grid;
    grid-template-columns: 1.45fr 0.8fr;
    gap: 26px;
    align-items: stretch;
    padding: 44px;
    border-radius: 30px;
    background: rgba(15, 23, 42, 0.70);
    border: 1px solid var(--border);
    box-shadow: 0 30px 100px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(16px);
}

.hero-content h1,
.page-title h1,
.lesson-detail h1 {
    font-size: 52px;
    line-height: 1.04;
    margin: 16px 0 18px;
    color: var(--white);
    letter-spacing: -1.5px;
}

.subtitle,
.page-title p {
    max-width: 820px;
    font-size: 18px;
    line-height: 1.75;
    color: #cbd5e1;
}

.badge,
.level,
.theme {
    display: inline-flex;
    width: fit-content;
    align-items: center;
    padding: 7px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 750;
}

.badge {
    background: rgba(59, 130, 246, 0.14);
    color: var(--blue-light);
    border: 1px solid rgba(147, 197, 253, 0.35);
}

.level {
    background: rgba(34, 197, 94, 0.13);
    color: #86efac;
    border: 1px solid rgba(134, 239, 172, 0.26);
}

.theme {
    background: rgba(59, 130, 246, 0.13);
    color: var(--blue-light);
    border: 1px solid rgba(147, 197, 253, 0.26);
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 26px;
    flex-wrap: wrap;
}

.button,
.small-button,
button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--blue);
    color: var(--white);
    border: none;
    padding: 14px 20px;
    border-radius: 13px;
    text-decoration: none;
    cursor: pointer;
    font-weight: 800;
    box-shadow: 0 14px 36px rgba(59, 130, 246, 0.28);
}

.button:hover,
.small-button:hover,
button:hover {
    background: #2563eb;
}

.button.secondary {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border);
    box-shadow: none;
}

.small-button {
    padding: 11px 15px;
    font-size: 14px;
}

.hero-dashboard {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.metric-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 22px;
}

.metric-card span {
    display: block;
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 8px;
}

.metric-card strong {
    color: var(--white);
    font-size: 26px;
    letter-spacing: -0.6px;
}

.section {
    margin-top: 56px;
}

.section-heading {
    margin-bottom: 22px;
}

.eyebrow {
    display: block;
    color: var(--blue-light);
    font-weight: 800;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

h2,
h3 {
    color: var(--white);
}

h2 {
    font-size: 30px;
    letter-spacing: -0.8px;
}

p {
    color: #cbd5e1;
    line-height: 1.72;
}

.grid-3,
.exercise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.feature-card,
.lesson-card,
.exercise-card,
.content-card,
.schema-card,
.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 24px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(14px);
}

.feature-card .icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: rgba(59, 130, 246, 0.16);
    color: var(--blue-light);
    font-weight: 900;
    margin-bottom: 14px;
}

.split {
    display: grid;
    grid-template-columns: 1fr 0.85fr;
    gap: 24px;
    align-items: start;
}

.stack-box {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 24px;
}

.stack-box span,
.tables span {
    padding: 8px 11px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.12);
    border: 1px solid rgba(148, 163, 184, 0.18);
    color: #dbeafe;
    font-weight: 700;
    font-size: 13px;
}

.page-title {
    margin-bottom: 30px;
}

.cards-list {
    display: grid;
    gap: 16px;
}

.lesson-card {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: center;
}

.exercise-card {
    display: flex;
    flex-direction: column;
    min-height: 310px;
}

.exercise-card .small-button {
    margin-top: auto;
}

.card-top {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tables {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 16px 0 20px;
}

.tables.vertical {
    flex-direction: column;
    align-items: flex-start;
}

.lesson-detail {
    max-width: 900px;
}

.back-link {
    color: var(--blue-light);
    text-decoration: none;
    font-weight: 800;
    display: inline-block;
    margin-bottom: 22px;
}

.clean-list {
    padding-left: 20px;
    color: #cbd5e1;
    line-height: 1.9;
}

pre {
    background: #020617;
    border: 1px solid rgba(148, 163, 184, 0.26);
    border-radius: 16px;
    padding: 18px;
    color: #dbeafe;
    overflow-x: auto;
    white-space: pre-wrap;
}

code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 14px;
}

.exercise-layout {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 24px;
    align-items: start;
}

.editor-panel {
    min-width: 0;
}

textarea {
    width: 100%;
    min-height: 260px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 15px;
    padding: 18px;
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.35);
    margin-bottom: 16px;
    background: #020617;
    color: #dbeafe;
    outline: none;
    resize: vertical;
}

textarea:focus {
    border-color: #60a5fa;
    box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.12);
}

.result-box {
    margin-top: 22px;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--panel-strong);
    border-radius: 16px;
    overflow: hidden;
}

th,
td {
    border-bottom: 1px solid rgba(148, 163, 184, 0.18);
    padding: 13px 14px;
    text-align: left;
}

th {
    background: rgba(59, 130, 246, 0.18);
    color: #bfdbfe;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

td {
    color: #e5e7eb;
}

.error {
    background: rgba(127, 29, 29, 0.45);
    color: #fecaca;
    padding: 14px;
    border-radius: 12px;
    margin-top: 16px;
    border: 1px solid rgba(248, 113, 113, 0.35);
}

.schema-relations {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 28px;
}

.relation-box {
    background: rgba(59, 130, 246, 0.16);
    color: var(--white);
    border: 1px solid rgba(147, 197, 253, 0.3);
    padding: 18px 24px;
    border-radius: 18px;
    font-weight: 900;
}

.relation-arrow {
    color: var(--blue-light);
    font-weight: 900;
}

.schema-list {
    display: grid;
    gap: 22px;
}

@media (max-width: 900px) {
    .hero,
    .split,
    .exercise-layout {
        grid-template-columns: 1fr;
    }

    .grid-3,
    .exercise-grid {
        grid-template-columns: 1fr;
    }

    .hero-content h1,
    .page-title h1,
    .lesson-detail h1 {
        font-size: 36px;
    }

    .nav-container {
        align-items: flex-start;
        flex-direction: column;
        gap: 14px;
    }

    .lesson-card {
        flex-direction: column;
        align-items: flex-start;
    }
}

.feedback {
    margin-top: 18px;
    padding: 16px;
    border-radius: 14px;
    font-weight: 800;
    border: 1px solid transparent;
}

.feedback.success {
    background: rgba(22, 101, 52, 0.42);
    color: #bbf7d0;
    border-color: rgba(34, 197, 94, 0.42);
}

.feedback.warning {
    background: rgba(146, 64, 14, 0.42);
    color: #fed7aa;
    border-color: rgba(251, 146, 60, 0.42);
}

.feedback.error {
    background: rgba(127, 29, 29, 0.42);
    color: #fecaca;
    border-color: rgba(248, 113, 113, 0.42);
}

.helper-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 22px 0;
}

.secondary-button {
    background: rgba(34, 197, 94, 0.16);
    color: #bbf7d0;
    border: 1px solid rgba(34, 197, 94, 0.32);
    box-shadow: none;
}

.secondary-button:hover {
    background: rgba(34, 197, 94, 0.26);
}

.ghost-button {
    background: rgba(255, 255, 255, 0.07);
    color: #dbeafe;
    border: 1px solid rgba(148, 163, 184, 0.24);
    box-shadow: none;
}

.ghost-button:hover {
    background: rgba(255, 255, 255, 0.12);
}

.hint-box {
    margin-top: 18px;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(147, 197, 253, 0.28);
    border-radius: 16px;
    padding: 18px;
}

.hint-box h3 {
    margin-top: 0;
    color: #bfdbfe;
}

.solution-box {
    margin-top: 18px;
}

.progress-line {
    margin: 18px 0;
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(59, 130, 246, 0.10);
    border: 1px solid rgba(147, 197, 253, 0.22);
    color: #bfdbfe;
    font-weight: 800;
    font-size: 14px;
}

.exercise-nav {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 24px;
}

.ghost-link {
    display: inline-flex;
    color: #dbeafe;
    text-decoration: none;
    font-weight: 800;
    padding: 10px 13px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(148, 163, 184, 0.22);
}

.ghost-link:hover {
    background: rgba(255, 255, 255, 0.12);
}

.solution-warning {
    color: #fed7aa;
    font-weight: 700;
    background: rgba(146, 64, 14, 0.24);
    border: 1px solid rgba(251, 146, 60, 0.28);
    padding: 12px;
    border-radius: 12px;
}

.glossary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.glossary-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 22px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
}

.glossary-card h2 {
    font-size: 22px;
    color: #bfdbfe;
    margin-top: 0;
}

@media (max-width: 900px) {
    .glossary-grid {
        grid-template-columns: 1fr;
    }
}

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-bottom: 28px;
}

.kpi-card {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(15, 23, 42, 0.82));
    border: 1px solid rgba(147, 197, 253, 0.25);
    border-radius: 22px;
    padding: 24px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.22);
}

.kpi-card span {
    display: block;
    color: #bfdbfe;
    font-size: 13px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 12px;
}

.kpi-card strong {
    color: #ffffff;
    font-size: 30px;
    letter-spacing: -0.8px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
    margin-bottom: 24px;
}

.bar-chart {
    display: grid;
    gap: 15px;
    margin-top: 18px;
}

.bar-row {
    display: grid;
    grid-template-columns: 140px 1fr 90px;
    gap: 12px;
    align-items: center;
}

.bar-label {
    color: #dbeafe;
    font-weight: 750;
    font-size: 13px;
}

.bar-track {
    height: 12px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.18);
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    border-radius: 999px;
    background: #3b82f6;
}

.bar-fill.green {
    background: #22c55e;
}

.bar-value {
    color: #cbd5e1;
    font-weight: 700;
    font-size: 13px;
    text-align: right;
}

@media (max-width: 900px) {
    .kpi-grid,
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .bar-row {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .bar-value {
        text-align: left;
    }
}

.mini-schema {
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid rgba(148, 163, 184, 0.18);
}

.schema-mini-card {
    background: rgba(2, 6, 23, 0.42);
    border: 1px solid rgba(148, 163, 184, 0.20);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 14px;
}

.schema-mini-card h4 {
    margin: 0 0 8px;
    color: #bfdbfe;
    font-size: 16px;
}

.schema-mini-card p {
    margin: 0 0 10px;
    font-size: 13px;
    color: #94a3b8;
}

.schema-mini-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
}

.schema-mini-card li {
    display: grid;
    grid-template-columns: 135px 1fr;
    gap: 10px;
    align-items: start;
    font-size: 13px;
}

.schema-mini-card code {
    color: #dbeafe;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(147, 197, 253, 0.18);
    border-radius: 8px;
    padding: 4px 7px;
    width: fit-content;
}

.schema-mini-card li span {
    color: #cbd5e1;
}

.schema-link {
    display: inline-flex;
    margin-top: 6px;
    color: #93c5fd;
    text-decoration: none;
    font-weight: 800;
    font-size: 14px;
}

.schema-link:hover {
    color: #bfdbfe;
}

.editor-wrapper {
    position: relative;
}

.autocomplete-box {
    position: absolute;
    left: 18px;
    bottom: 28px;
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(147, 197, 253, 0.35);
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
    color: #dbeafe;
    padding: 10px 12px;
    border-radius: 12px;
    font-size: 13px;
    z-index: 5;
}

.autocomplete-label {
    color: #93c5fd;
    font-weight: 800;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.06em;
}

#autocompleteValue {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    color: #ffffff;
    font-weight: 800;
}

.autocomplete-key {
    background: rgba(59, 130, 246, 0.18);
    border: 1px solid rgba(147, 197, 253, 0.25);
    color: #bfdbfe;
    border-radius: 8px;
    padding: 3px 7px;
    font-size: 12px;
    font-weight: 900;
}

.editor-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.copy-button {
    margin-bottom: 12px;
    background: rgba(59, 130, 246, 0.16);
    color: #bfdbfe;
    border: 1px solid rgba(147, 197, 253, 0.32);
    box-shadow: none;
}

.copy-button:hover {
    background: rgba(59, 130, 246, 0.26);
}

.filters-panel {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 0.9fr;
    gap: 16px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 20px;
    margin-bottom: 26px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
}

.filters-panel label {
    display: block;
    color: #bfdbfe;
    font-size: 13px;
    font-weight: 850;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
}

.filter-input {
    width: 100%;
    background: #020617;
    border: 1px solid rgba(148, 163, 184, 0.32);
    border-radius: 13px;
    color: #e5e7eb;
    padding: 13px 14px;
    font-size: 14px;
    outline: none;
}

.filter-input:focus {
    border-color: #60a5fa;
    box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.12);
}

.no-results {
    background: rgba(127, 29, 29, 0.28);
    border: 1px solid rgba(248, 113, 113, 0.28);
    color: #fecaca;
    border-radius: 18px;
    padding: 18px;
    font-weight: 800;
}

@media (max-width: 900px) {
    .filters-panel {
        grid-template-columns: 1fr;
    }
}

.premium-hero {
    position: relative;
    overflow: hidden;
}

.premium-hero::before {
    content: "";
    position: absolute;
    inset: -2px;
    background:
        radial-gradient(circle at top right, rgba(34, 197, 94, 0.14), transparent 34%),
        radial-gradient(circle at bottom left, rgba(59, 130, 246, 0.20), transparent 36%);
    pointer-events: none;
}

.premium-hero > * {
    position: relative;
    z-index: 1;
}

.roadmap {
    display: grid;
    gap: 20px;
}

.roadmap-step {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 22px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 26px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.20);
    backdrop-filter: blur(14px);
}

.roadmap-number {
    width: 54px;
    height: 54px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    background: rgba(59, 130, 246, 0.16);
    border: 1px solid rgba(147, 197, 253, 0.28);
    color: #bfdbfe;
    font-size: 24px;
    font-weight: 950;
}

.roadmap-step h2 {
    margin: 14px 0 8px;
}

.roadmap-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}

.roadmap-links a {
    display: inline-flex;
    padding: 9px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(148, 163, 184, 0.20);
    color: #dbeafe;
    text-decoration: none;
    font-weight: 800;
    font-size: 13px;
}

.roadmap-links a:hover {
    background: rgba(59, 130, 246, 0.18);
    border-color: rgba(147, 197, 253, 0.28);
}

@media (max-width: 900px) {
    .roadmap-step {
        grid-template-columns: 1fr;
    }
}

.progress-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.12), rgba(59, 130, 246, 0.12));
    border: 1px solid rgba(147, 197, 253, 0.24);
    border-radius: 24px;
    padding: 24px;
    margin: 28px 0;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
}

.progress-summary h2 {
    margin: 8px 0;
}

.progress-summary p {
    margin: 0;
}

.exercise-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-top: auto;
}

.completed-badge {
    align-items: center;
    justify-content: center;
    padding: 8px 11px;
    border-radius: 999px;
    background: rgba(34, 197, 94, 0.16);
    color: #bbf7d0;
    border: 1px solid rgba(34, 197, 94, 0.32);
    font-weight: 900;
    font-size: 13px;
}

@media (max-width: 900px) {
    .progress-summary {
        flex-direction: column;
        align-items: flex-start;
    }

    .exercise-card-footer {
        flex-direction: column;
        align-items: flex-start;
    }
}

.home-hero {
    grid-template-columns: 1.15fr 0.95fr;
}

.home-preview-card {
    background: rgba(2, 6, 23, 0.62);
    border: 1px solid rgba(147, 197, 253, 0.24);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
    align-self: stretch;
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #93c5fd;
    font-weight: 850;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 18px;
}

.preview-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: #22c55e;
    box-shadow: 0 0 18px rgba(34, 197, 94, 0.8);
}

.home-preview-card h2 {
    font-size: 28px;
    margin-bottom: 12px;
}

.home-preview-card pre {
    margin-top: 18px;
    max-height: 260px;
    overflow: auto;
}

.home-actions-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 22px;
}

.method-list {
    display: grid;
    gap: 14px;
}

.method-item {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 18px;
}

.method-item strong {
    display: block;
    color: #ffffff;
    font-size: 17px;
    margin-bottom: 8px;
}

.method-item span {
    color: #cbd5e1;
    line-height: 1.6;
}

.database-map {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.db-card {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.86), rgba(59, 130, 246, 0.10));
    border: 1px solid rgba(147, 197, 253, 0.22);
    border-radius: 22px;
    padding: 24px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
}

.db-card h3 {
    margin-top: 0;
    font-size: 22px;
}

.db-card p {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 14px;
    color: #bfdbfe;
    background: rgba(2, 6, 23, 0.48);
    border: 1px solid rgba(147, 197, 253, 0.18);
    padding: 12px;
    border-radius: 12px;
}

.db-card span {
    color: #cbd5e1;
    line-height: 1.6;
}

.home-dashboard-teaser {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.12), rgba(59, 130, 246, 0.12));
    border: 1px solid rgba(147, 197, 253, 0.22);
    border-radius: 24px;
    padding: 28px;
}

.home-dashboard-teaser p {
    max-width: 760px;
}

.final-cta {
    text-align: center;
    background: rgba(15, 23, 42, 0.72);
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 40px 28px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.22);
}

.final-cta p {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions.center {
    justify-content: center;
}

@media (max-width: 900px) {
    .home-hero,
    .database-map {
        grid-template-columns: 1fr;
    }

    .home-dashboard-teaser {
        flex-direction: column;
        align-items: flex-start;
    }

    .home-preview-card pre {
        max-height: none;
    }
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 14px;
}

.result-header h2 {
    margin: 0;
}

.analysis-list {
    display: grid;
    gap: 14px;
    margin-top: 20px;
}

.analysis-item {
    background: rgba(2, 6, 23, 0.42);
    border: 1px solid rgba(147, 197, 253, 0.20);
    border-radius: 16px;
    padding: 16px;
}

.analysis-item span {
    display: inline-flex;
    color: #93c5fd;
    font-size: 12px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    margin-bottom: 8px;
}

.analysis-item p {
    margin: 0;
    color: #e5e7eb;
    font-weight: 650;
}

@media (max-width: 900px) {
    .result-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

.business-case-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}

.business-case-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 26px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.20);
    backdrop-filter: blur(14px);
}

.business-case-card h2 {
    margin-bottom: 10px;
}

.business-case-card h3 {
    font-size: 16px;
    margin-top: 22px;
    margin-bottom: 10px;
    color: #bfdbfe;
}

.query-history {
    margin-top: 24px;
    background: rgba(2, 6, 23, 0.32);
    border: 1px solid rgba(148, 163, 184, 0.20);
    border-radius: 18px;
    padding: 18px;
}

.query-history .result-header {
    margin-bottom: 14px;
}

.query-history h2 {
    font-size: 22px;
}

.query-history-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: start;
    margin-bottom: 12px;
}

.query-history-item pre {
    margin: 0;
    max-height: 120px;
    overflow: auto;
    font-size: 13px;
}

@media (max-width: 900px) {
    .business-case-grid,
    .query-history-item {
        grid-template-columns: 1fr;
    }
}

.query-history {
    margin-top: 24px;
    background: rgba(2, 6, 23, 0.32);
    border: 1px solid rgba(148, 163, 184, 0.20);
    border-radius: 18px;
    padding: 18px;
}

.query-history .result-header {
    margin-bottom: 14px;
}

.query-history h2 {
    font-size: 22px;
}

.query-history-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: start;
    margin-bottom: 12px;
}

.query-history-item pre {
    margin: 0;
    max-height: 120px;
    overflow: auto;
    font-size: 13px;
}

@media (max-width: 900px) {
    .query-history-item {
        grid-template-columns: 1fr;
    }
}

.exercise-workspace {
    display: grid;
    grid-template-columns: 360px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
}

.workspace-sidebar {
    position: sticky;
    top: 92px;
}

.workspace-main {
    display: grid;
    gap: 18px;
    min-width: 0;
}

.compact-panel {
    padding: 20px;
}

.compact-panel h1 {
    font-size: 30px;
    line-height: 1.1;
    margin-bottom: 12px;
}

.compact-panel h2 {
    font-size: 24px;
}

.compact-panel p {
    font-size: 14px;
}

.editor-header {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: flex-start;
}

#sqlEditor {
    min-height: 210px;
}

.result-panel {
    margin-top: 0;
}

.compact-result {
    max-height: 360px;
    overflow: auto;
    border-radius: 16px;
}

.compact-result table {
    margin-top: 0;
}

.accordion-block {
    margin-top: 18px;
    background: rgba(2, 6, 23, 0.28);
    border: 1px solid rgba(148, 163, 184, 0.20);
    border-radius: 16px;
    padding: 14px;
}

.accordion-block summary,
.query-history summary {
    cursor: pointer;
    color: #bfdbfe;
    font-weight: 900;
    list-style: none;
}

.accordion-block summary::-webkit-details-marker,
.query-history summary::-webkit-details-marker {
    display: none;
}

.accordion-block summary::before,
.query-history summary::before {
    content: "+";
    display: inline-flex;
    width: 22px;
    height: 22px;
    margin-right: 8px;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.18);
    color: #93c5fd;
}

.accordion-block[open] summary::before,
.query-history[open] summary::before {
    content: "−";
}

.query-history {
    margin-top: 0;
}

.query-history-inner {
    margin-top: 16px;
}

.query-history-item pre {
    max-height: 90px;
}

.compact-box {
    padding: 14px;
}

.schema-mini-card {
    padding: 13px;
}

.schema-mini-card li {
    grid-template-columns: 115px 1fr;
}

@media (max-width: 1000px) {
    .exercise-workspace {
        grid-template-columns: 1fr;
    }

    .workspace-sidebar {
        position: static;
    }
}


.challenge-panel {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 16px;
    align-items: end;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 22px;
    margin-bottom: 24px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
}

.challenge-panel label {
    display: block;
    color: #bfdbfe;
    font-size: 13px;
    font-weight: 850;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
}

.challenge-result {
    margin-bottom: 36px;
}

.shortcut-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.shortcut-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 22px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
}

.shortcut-card h2 {
    font-size: 22px;
    margin-top: 0;
}

.shortcut-card pre {
    max-height: 260px;
}

.focus-mode .workspace-sidebar,
.focus-mode .site-header,
.focus-mode .back-link,
.focus-mode .query-history {
    display: none;
}

.focus-mode .container {
    max-width: 1280px;
}

.focus-mode .exercise-workspace {
    display: block;
}

.focus-mode .workspace-main {
    max-width: 1180px;
    margin: 0 auto;
}

.focus-mode #sqlEditor {
    min-height: 420px;
}

.focus-mode .editor-panel {
    border-color: rgba(147, 197, 253, 0.42);
}

@media (max-width: 900px) {
    .challenge-panel,
    .shortcut-grid {
        grid-template-columns: 1fr;
    }
}
\n
.lesson-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
    margin: 22px 0;
}

.lesson-detail .content-card {
    margin-bottom: 22px;
}

.lesson-detail pre {
    min-height: 170px;
}

@media (max-width: 900px) {
    .lesson-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 16px;
        overflow-x: hidden;
    }

    .container {
        padding: 24px 14px 50px;
        max-width: 100%;
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 50;
    }

    .nav-container {
        padding: 14px;
        gap: 12px;
    }

    .brand {
        font-size: 18px;
        line-height: 1.2;
    }

    .nav {
        width: 100%;
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: 10px;
        padding-bottom: 6px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .nav::-webkit-scrollbar {
        display: none;
    }

    .nav a {
        flex: 0 0 auto;
        font-size: 14px;
        padding: 9px 11px;
        border-radius: 999px;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(148, 163, 184, 0.16);
    }

    .hero,
    .home-hero,
    .premium-hero,
    .split,
    .dashboard-grid,
    .kpi-grid,
    .grid-3,
    .exercise-grid,
    .business-case-grid,
    .database-map,
    .lesson-grid,
    .shortcut-grid,
    .glossary-grid,
    .challenge-panel,
    .exercise-workspace,
    .filters-panel {
        grid-template-columns: 1fr !important;
    }

    .hero {
        padding: 24px 18px;
        border-radius: 22px;
        gap: 20px;
    }

    .hero-content h1,
    .page-title h1,
    .lesson-detail h1 {
        font-size: 34px;
        line-height: 1.08;
        letter-spacing: -0.8px;
    }

    h1 {
        font-size: 32px;
        line-height: 1.1;
    }

    h2 {
        font-size: 24px;
        line-height: 1.18;
    }

    h3 {
        font-size: 18px;
    }

    .subtitle,
    .page-title p,
    p {
        font-size: 16px;
        line-height: 1.65;
    }

    .badge,
    .level,
    .theme {
        font-size: 13px;
        padding: 7px 11px;
    }

    .hero-actions,
    .home-actions-inline,
    .editor-actions,
    .exercise-nav,
    .roadmap-links {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .button,
    .small-button,
    button,
    .ghost-link {
        width: 100%;
        justify-content: center;
        min-height: 46px;
        font-size: 15px;
        text-align: center;
    }

    .feature-card,
    .content-card,
    .panel,
    .schema-card,
    .business-case-card,
    .shortcut-card,
    .lesson-card,
    .exercise-card,
    .kpi-card,
    .db-card,
    .metric-card,
    .home-preview-card {
        padding: 18px;
        border-radius: 18px;
    }

    .home-preview-card pre,
    pre {
        font-size: 13px;
        max-height: 260px;
        overflow: auto;
    }

    code {
        font-size: 13px;
    }

    .workspace-sidebar {
        position: static;
    }

    .workspace-main {
        gap: 14px;
    }

    .compact-panel h1 {
        font-size: 28px;
    }

    #sqlEditor,
    textarea {
        min-height: 280px;
        font-size: 15px;
        line-height: 1.55;
        padding: 14px;
    }

    .editor-wrapper {
        width: 100%;
    }

    .autocomplete-box {
        left: 10px;
        right: 10px;
        bottom: 22px;
        flex-wrap: wrap;
    }

    .result-header {
        flex-direction: column;
        align-items: stretch;
    }

    .result-box,
    .compact-result {
        max-width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table {
        min-width: 640px;
        font-size: 14px;
    }

    th,
    td {
        padding: 10px 12px;
        white-space: nowrap;
    }

    .schema-relations {
        align-items: stretch;
        gap: 8px;
    }

    .relation-box,
    .relation-arrow {
        width: 100%;
        text-align: center;
    }

    .schema-mini-card li {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .schema-mini-card code {
        font-size: 13px;
    }

    .tables {
        gap: 7px;
    }

    .tables span,
    .stack-box span {
        font-size: 13px;
    }

    .roadmap-step {
        grid-template-columns: 1fr;
        padding: 20px;
    }

    .roadmap-number {
        width: 48px;
        height: 48px;
        font-size: 22px;
    }

    .filter-input {
        min-height: 46px;
        font-size: 15px;
    }

    .bar-row {
        grid-template-columns: 1fr;
        gap: 7px;
    }

    .bar-value {
        text-align: left;
    }

    .home-dashboard-teaser {
        flex-direction: column;
        align-items: stretch;
        padding: 22px;
    }

    .final-cta {
        padding: 28px 18px;
    }

    .progress-summary {
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
    }

    .query-history-item {
        grid-template-columns: 1fr;
    }

    .query-history-item pre {
        max-height: 140px;
    }

    .challenge-panel {
        align-items: stretch;
    }

    .focus-mode .container {
        padding: 18px 10px;
    }

    .focus-mode #sqlEditor {
        min-height: 430px;
    }
}

@media (max-width: 420px) {
    .hero-content h1,
    .page-title h1,
    .lesson-detail h1 {
        font-size: 30px;
    }

    h2 {
        font-size: 22px;
    }

    .container {
        padding-left: 10px;
        padding-right: 10px;
    }

    .feature-card,
    .content-card,
    .panel,
    .schema-card,
    .business-case-card,
    .shortcut-card,
    .lesson-card,
    .exercise-card,
    .kpi-card,
    .db-card,
    .metric-card,
    .home-preview-card {
        padding: 16px;
    }

    #sqlEditor,
    textarea {
        font-size: 14px;
    }

    table {
        min-width: 600px;
    }
}


.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 34px;
    border-radius: 11px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(34, 197, 94, 0.18));
    border: 1px solid rgba(147, 197, 253, 0.34);
    color: #bfdbfe;
    font-size: 13px;
    font-weight: 950;
    letter-spacing: 0.03em;
    box-shadow: 0 12px 30px rgba(59, 130, 246, 0.16);
}

.site-footer {
    border-top: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(2, 6, 23, 0.72);
    backdrop-filter: blur(16px);
    margin-top: 40px;
}

.footer-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 28px 24px;
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #ffffff;
    margin-bottom: 10px;
}

.footer-inner p {
    margin: 0;
    color: #94a3b8;
    font-size: 14px;
    max-width: 620px;
}

.footer-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}

.footer-meta span {
    display: inline-flex;
    padding: 8px 11px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.10);
    border: 1px solid rgba(148, 163, 184, 0.16);
    color: #cbd5e1;
    font-size: 13px;
    font-weight: 750;
}

.home-hero .subtitle {
    font-size: 19px;
    color: #dbeafe;
}

.home-preview-card {
    position: relative;
    overflow: hidden;
}

.home-preview-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.14), transparent 42%);
    pointer-events: none;
}

.home-preview-card > * {
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .brand-mark {
        width: 38px;
        height: 31px;
        font-size: 12px;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        padding: 24px 14px;
    }

    .footer-meta {
        justify-content: flex-start;
    }

    .footer-meta span {
        font-size: 12px;
    }

    .home-hero .subtitle {
        font-size: 16px;
    }
}


.footer-inner {
    border-top: 1px solid rgba(147, 197, 253, 0.10);
}

.footer-brand strong {
    letter-spacing: -0.3px;
}

.footer-meta span {
    transition: background 0.2s ease, border-color 0.2s ease;
}

.footer-meta span:hover {
    background: rgba(59, 130, 246, 0.14);
    border-color: rgba(147, 197, 253, 0.28);
}


.scroll-top-button {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 80;
    width: 46px;
    height: 46px;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.92);
    border: 1px solid rgba(147, 197, 253, 0.40);
    color: #ffffff;
    font-size: 20px;
    font-weight: 900;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.code-copy-wrapper {
    position: relative;
}

.code-copy-mini {
    position: absolute;
    top: 10px;
    right: 10px;
    width: auto;
    min-height: auto;
    padding: 7px 10px;
    border-radius: 10px;
    background: rgba(59, 130, 246, 0.18);
    border: 1px solid rgba(147, 197, 253, 0.28);
    color: #bfdbfe;
    font-size: 12px;
    font-weight: 850;
    box-shadow: none;
    z-index: 4;
}

.pilotage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-bottom: 24px;
}

.pilotage-card {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(59, 130, 246, 0.10));
    border: 1px solid rgba(147, 197, 253, 0.22);
    border-radius: 22px;
    padding: 22px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
}

.pilotage-card span {
    display: block;
    color: #93c5fd;
    font-size: 13px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
}

.pilotage-card strong {
    display: block;
    color: #ffffff;
    font-size: 32px;
    letter-spacing: -0.8px;
    margin-bottom: 8px;
}

.pilotage-card p {
    margin: 0;
    color: #94a3b8;
    font-size: 14px;
}

.dashboard-alerts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 24px;
}

.alert-card {
    border-radius: 20px;
    padding: 20px;
    border: 1px solid rgba(148, 163, 184, 0.22);
}

.alert-card strong {
    display: block;
    color: #ffffff;
    font-size: 18px;
    margin-bottom: 8px;
}

.alert-card p {
    margin: 0;
}

.alert-card.warning {
    background: rgba(146, 64, 14, 0.22);
    border-color: rgba(251, 146, 60, 0.30);
}

.alert-card.success {
    background: rgba(22, 101, 52, 0.22);
    border-color: rgba(34, 197, 94, 0.30);
}

.lesson-summary-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 22px 0;
}

.lesson-summary-strip span {
    display: inline-flex;
    padding: 9px 12px;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(147, 197, 253, 0.22);
    color: #dbeafe;
    font-weight: 800;
    font-size: 13px;
}

.shortcut-intro {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
}

@media (max-width: 768px) {
    .pilotage-grid,
    .dashboard-alerts {
        grid-template-columns: 1fr;
    }

    .scroll-top-button {
        right: 14px;
        bottom: 14px;
        width: 42px;
        height: 42px;
    }

    .code-copy-mini {
        position: static;
        margin-bottom: 8px;
        width: 100%;
    }

    .lesson-summary-strip {
        flex-direction: column;
    }

    .lesson-summary-strip span {
        justify-content: center;
    }
}


.resource-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
    margin-bottom: 28px;
}

.resource-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 26px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.resource-card h2 {
    margin: 0;
}

.resource-card p {
    margin: 0 0 10px;
}

.resource-kicker {
    color: #93c5fd;
    font-size: 13px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.relation-method {
    margin-bottom: 24px;
}

.relation-method-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    margin-top: 18px;
}

.relation-method-grid div {
    background: rgba(2, 6, 23, 0.38);
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 18px;
    padding: 18px;
}

.relation-method-grid h3 {
    color: #bfdbfe;
    margin-top: 0;
}

.relation-reading {
    display: grid;
    gap: 22px;
    margin-bottom: 28px;
}

.relation-reading-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 20px 70px rgba(0, 0, 0, 0.18);
}

.relation-reading-card h2 {
    margin-top: 0;
}

.compact-relations {
    margin: 16px 0;
}

@media (max-width: 768px) {
    .resource-grid,
    .relation-method-grid {
        grid-template-columns: 1fr;
    }

    .resource-card,
    .relation-reading-card {
        padding: 18px;
    }
}

html {
    background: #020617;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    overscroll-behavior-x: none;
}

body {
    background: #020617;
    width: 100%;
    max-width: 100%;
    min-height: 100dvh;
    overflow-x: hidden;
    overscroll-behavior-x: none;
}

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

.site-header,
.container,
.site-footer {
    max-width: 100%;
    overflow-x: hidden;
}

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

pre,
code {
    max-width: 100%;
}

@media (max-width: 768px) {
    html,
    body {
        background: #020617;
        overflow-x: hidden;
        overscroll-behavior-x: none;
        touch-action: pan-y;
    }

    .container,
    main,
    section,
    article,
    header,
    footer {
        max-width: 100%;
    }

    .hero,
    .panel,
    .content-card,
    .feature-card,
    .exercise-card,
    .schema-card,
    .business-case-card,
    .shortcut-card,
    .resource-card,
    .relation-reading-card,
    .home-preview-card,
    .kpi-card,
    .db-card {
        max-width: 100%;
        overflow-x: hidden;
    }

    .nav-container {
        max-width: 100%;
        overflow-x: hidden;
    }

    .nav {
        max-width: 100%;
    }

    .result-box,
    .compact-result,
    .schema-card,
    .shortcut-card,
    .home-preview-card {
        overflow-x: auto;
    }
}

html {
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.22), transparent 34%),
        radial-gradient(circle at top right, rgba(34, 197, 94, 0.10), transparent 30%),
        linear-gradient(135deg, #0f172a 0%, #111827 45%, #172554 100%);
}

body {
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.22), transparent 34%),
        radial-gradient(circle at top right, rgba(34, 197, 94, 0.10), transparent 30%),
        linear-gradient(135deg, #0f172a 0%, #111827 45%, #172554 100%);
}

@media (max-width: 768px) {
    html,
    body {
        background:
            radial-gradient(circle at top left, rgba(59, 130, 246, 0.24), transparent 38%),
            radial-gradient(circle at bottom right, rgba(37, 99, 235, 0.16), transparent 34%),
            linear-gradient(135deg, #0f172a 0%, #111827 42%, #172554 100%);
    }
}

:root {
    background-color: #172554;
}

html {
    min-height: 100%;
    background-color: #172554 !important;
    background-image:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.24), transparent 36%),
        linear-gradient(135deg, #0f172a 0%, #111827 45%, #172554 100%) !important;
}

body {
    min-height: 100vh;
    min-height: 100dvh;
    background-color: transparent !important;
    position: relative;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -10;
    pointer-events: none;
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.24), transparent 36%),
        radial-gradient(circle at bottom right, rgba(37, 99, 235, 0.18), transparent 34%),
        linear-gradient(135deg, #0f172a 0%, #111827 45%, #172554 100%);
}

.site-footer {
    background:
        linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(23, 37, 84, 0.96));
}

@media (max-width: 768px) {
    :root,
    html {
        background-color: #172554 !important;
        background-image:
            radial-gradient(circle at top left, rgba(59, 130, 246, 0.26), transparent 38%),
            linear-gradient(135deg, #0f172a 0%, #111827 44%, #172554 100%) !important;
    }

    body::before {
        background:
            radial-gradient(circle at top left, rgba(59, 130, 246, 0.26), transparent 38%),
            radial-gradient(circle at bottom right, rgba(37, 99, 235, 0.20), transparent 34%),
            linear-gradient(135deg, #0f172a 0%, #111827 44%, #172554 100%);
    }

    .site-footer {
        background:
            linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(23, 37, 84, 0.98));
    }
}


.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    align-items: flex-start;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.footer-column h3 {
    margin: 0 0 4px;
    color: #bfdbfe;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

.footer-column a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 14px;
    font-weight: 650;
}

.footer-column a:hover {
    color: #93c5fd;
}

.footer-main p {
    max-width: 430px;
}

.footer-bottom {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom span {
    display: inline-flex;
    padding: 8px 11px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.10);
    border: 1px solid rgba(148, 163, 184, 0.16);
    color: #cbd5e1;
    font-size: 13px;
    font-weight: 750;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        padding: 0 14px 24px;
    }

    .footer-column a {
        font-size: 15px;
        padding: 2px 0;
    }
}


.premium-proof-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.premium-proof-strip span {
    display: inline-flex;
    padding: 9px 13px;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.14);
    border: 1px solid rgba(147, 197, 253, 0.24);
    color: #dbeafe;
    font-size: 13px;
    font-weight: 850;
}

.mobile-wow-card {
    display: none;
}

.premium-appear {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.55s ease, transform 0.55s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.premium-appear.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover,
.content-card:hover,
.exercise-card:hover,
.resource-card:hover,
.business-case-card:hover,
.shortcut-card:hover,
.kpi-card:hover {
    border-color: rgba(147, 197, 253, 0.34);
    box-shadow: 0 24px 80px rgba(37, 99, 235, 0.18);
}

.mobile-floating-cta {
    display: none;
}

@media (max-width: 768px) {
    .premium-hero {
        border: 1px solid rgba(147, 197, 253, 0.28);
        box-shadow:
            0 28px 90px rgba(37, 99, 235, 0.20),
            inset 0 1px 0 rgba(255, 255, 255, 0.04);
    }

    .home-hero {
        padding-top: 28px;
    }

    .home-hero .badge {
        background: rgba(59, 130, 246, 0.20);
        border-color: rgba(147, 197, 253, 0.34);
    }

    .premium-proof-strip {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 9px;
        margin-top: 20px;
    }

    .premium-proof-strip span {
        justify-content: center;
        min-height: 42px;
        font-size: 14px;
        background:
            linear-gradient(135deg, rgba(59, 130, 246, 0.20), rgba(34, 197, 94, 0.10));
    }

    .mobile-wow-card {
        display: block;
        margin: 20px 0 26px;
        padding: 22px;
        border-radius: 24px;
        background:
            radial-gradient(circle at top right, rgba(59, 130, 246, 0.24), transparent 36%),
            linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 64, 175, 0.28));
        border: 1px solid rgba(147, 197, 253, 0.28);
        box-shadow: 0 24px 80px rgba(37, 99, 235, 0.18);
    }

    .mobile-wow-card h2 {
        margin: 10px 0 12px;
        font-size: 25px;
    }

    .mobile-wow-card p {
        color: #cbd5e1;
        margin-bottom: 18px;
    }

    .wow-metrics {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .wow-metrics div {
        padding: 13px 10px;
        border-radius: 16px;
        background: rgba(2, 6, 23, 0.42);
        border: 1px solid rgba(147, 197, 253, 0.18);
        text-align: center;
    }

    .wow-metrics strong {
        display: block;
        color: #ffffff;
        font-size: 17px;
        margin-bottom: 4px;
    }

    .wow-metrics span {
        color: #93c5fd;
        font-size: 12px;
        font-weight: 800;
    }

    .mobile-floating-cta {
        position: fixed;
        left: 14px;
        right: 14px;
        bottom: 14px;
        z-index: 90;
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 52px;
        border-radius: 999px;
        text-decoration: none;
        background:
            linear-gradient(135deg, rgba(59, 130, 246, 0.98), rgba(37, 99, 235, 0.98));
        color: #ffffff;
        font-weight: 950;
        letter-spacing: 0.02em;
        box-shadow:
            0 22px 70px rgba(37, 99, 235, 0.42),
            inset 0 1px 0 rgba(255, 255, 255, 0.18);
        border: 1px solid rgba(191, 219, 254, 0.36);
    }

    .mobile-floating-cta span::after {
        content: " →";
    }

    .site-footer {
        padding-bottom: 64px;
    }

    .scroll-top-button {
        bottom: 78px;
    }

    .nav {
        background: rgba(15, 23, 42, 0.55);
        border: 1px solid rgba(147, 197, 253, 0.14);
        border-radius: 999px;
        padding: 6px;
    }

    .nav a {
        background: rgba(255, 255, 255, 0.05);
    }

    .nav a:hover {
        background: rgba(59, 130, 246, 0.18);
    }

    .feature-card,
    .content-card,
    .exercise-card,
    .resource-card,
    .business-case-card,
    .shortcut-card,
    .kpi-card {
        box-shadow: 0 18px 60px rgba(15, 23, 42, 0.28);
    }
}