:root {
    --font-body: "Segoe UI Variable", "Trebuchet MS", sans-serif;
    --font-display: "Bahnschrift", "Arial Narrow", sans-serif;
    --font-mono: "Consolas", "Lucida Console", monospace;
    --bg: #0a0f1c;
    --bg-elevated: rgba(14, 21, 39, 0.88);
    --bg-soft: rgba(23, 34, 58, 0.72);
    --panel-border: rgba(120, 146, 196, 0.18);
    --panel-strong: rgba(120, 146, 196, 0.28);
    --text: #edf4ff;
    --muted: #8da3c7;
    --accent: #5eead4;
    --accent-strong: #38bdf8;
    --accent-glow: rgba(94, 234, 212, 0.28);
    --danger: #fb7185;
    --danger-strong: #e11d48;
    --success: #34d399;
    --success-ink: #d8fff1;
    --error-ink: #ffe3eb;
    --shadow-lg: 0 28px 60px rgba(3, 8, 20, 0.42);
    --shadow-sm: 0 14px 30px rgba(3, 8, 20, 0.24);
    --button-text: #03121d;
    --grid-line: rgba(132, 156, 194, 0.08);
    --scanline-opacity: 0;
    --page-gradient:
        radial-gradient(circle at top left, rgba(56, 189, 248, 0.16), transparent 35%),
        radial-gradient(circle at top right, rgba(94, 234, 212, 0.12), transparent 30%),
        linear-gradient(180deg, #050913 0%, #09111f 48%, #050913 100%);
}

body[data-theme="cyberpunk"] {
    --bg: #07030d;
    --bg-elevated: rgba(16, 8, 26, 0.84);
    --bg-soft: rgba(28, 11, 42, 0.78);
    --panel-border: rgba(255, 0, 153, 0.24);
    --panel-strong: rgba(33, 248, 239, 0.34);
    --text: #f8f2ff;
    --muted: #b6a8db;
    --accent: #21f8ef;
    --accent-strong: #ff2fb3;
    --accent-glow: rgba(33, 248, 239, 0.26);
    --danger: #ff6f91;
    --danger-strong: #ff3366;
    --success: #70ffb2;
    --success-ink: #dcffee;
    --error-ink: #ffe2ef;
    --button-text: #140316;
    --grid-line: rgba(255, 47, 179, 0.12);
    --scanline-opacity: 0.12;
    --page-gradient:
        radial-gradient(circle at 20% 20%, rgba(255, 47, 179, 0.23), transparent 24%),
        radial-gradient(circle at 80% 12%, rgba(33, 248, 239, 0.18), transparent 26%),
        radial-gradient(circle at 50% 100%, rgba(111, 66, 193, 0.24), transparent 36%),
        linear-gradient(180deg, #030107 0%, #0b0413 52%, #030107 100%);
}

body[data-theme="paper"] {
    --bg: #f3ecd9;
    --bg-elevated: rgba(255, 251, 239, 0.96);
    --bg-soft: rgba(231, 221, 196, 0.72);
    --panel-border: rgba(54, 48, 36, 0.18);
    --panel-strong: rgba(54, 48, 36, 0.34);
    --text: #181713;
    --muted: #625c4e;
    --accent: #d9c895;
    --accent-strong: #b8a46e;
    --accent-glow: rgba(111, 94, 50, 0.16);
    --danger: #a53b36;
    --danger-strong: #7d2824;
    --success: #4f6d45;
    --success-ink: #173014;
    --error-ink: #5e1714;
    --shadow-lg: 0 18px 45px rgba(62, 52, 32, 0.13);
    --shadow-sm: 0 10px 24px rgba(62, 52, 32, 0.1);
    --button-text: #181713;
    --grid-line: rgba(70, 60, 40, 0.035);
    --scanline-opacity: 0;
    --page-gradient: linear-gradient(180deg, #f7f1e2 0%, #eee5cf 100%);
}

* {
    box-sizing: border-box;
}

html {
    color-scheme: dark;
}

body {
    font-family: var(--font-body);
    margin: 0;
    min-height: 100vh;
    background: var(--page-gradient);
    background-color: var(--bg);
    color: var(--text);
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(to right, transparent 0, transparent calc(100% - 1px), var(--grid-line) calc(100% - 1px)),
        linear-gradient(to bottom, transparent 0, transparent calc(100% - 1px), var(--grid-line) calc(100% - 1px));
    background-size: 72px 72px;
    pointer-events: none;
    opacity: 0.65;
}

.page-aura,
.scanlines {
    position: fixed;
    inset: 0;
    pointer-events: none;
}

.page-aura {
    background:
        radial-gradient(circle at 10% 10%, rgba(94, 234, 212, 0.09), transparent 20%),
        radial-gradient(circle at 85% 18%, rgba(56, 189, 248, 0.14), transparent 22%),
        radial-gradient(circle at 50% 100%, rgba(94, 234, 212, 0.08), transparent 30%);
    filter: blur(18px);
}

.scanlines {
    opacity: var(--scanline-opacity);
    background-image: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.06) 0,
        rgba(255, 255, 255, 0.06) 1px,
        transparent 1px,
        transparent 4px
    );
    mix-blend-mode: screen;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(18px);
    background: rgba(5, 10, 21, 0.72);
    border-bottom: 1px solid var(--panel-border);
}

.site-header-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 1.1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.brand-block {
    display: grid;
    gap: 0.15rem;
}

.eyebrow {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--accent);
}

.brand-block h1 {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 2.8vw, 2.1rem);
    letter-spacing: 0.04em;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.site-header nav {
    display: flex;
    gap: 0.7rem;
    align-items: center;
    flex-wrap: wrap;
}

.site-header a,
.brand-link {
    color: var(--text);
    text-decoration: none;
}

.site-header nav a,
.link-button {
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: 160ms ease;
}

.site-header nav a:hover,
.link-button:hover {
    border-color: var(--panel-strong);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 0 0 1px var(--accent-glow);
}

.page-content {
    padding: 2.4rem 1.5rem 4rem;
    max-width: 1120px;
    margin: 0 auto;
}

.card {
    background: var(--bg-elevated);
    border: 1px solid var(--panel-border);
    border-radius: 20px;
    padding: 1.35rem;
    box-shadow: var(--shadow-lg);
    margin-bottom: 1.25rem;
    backdrop-filter: blur(18px);
    position: relative;
    overflow: hidden;
}

.card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.16), transparent 35%, transparent 65%, rgba(94, 234, 212, 0.18));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.auth-card {
    max-width: 560px;
    margin-inline: auto;
}

.stack {
    display: grid;
    gap: 1rem;
}

label {
    display: grid;
    gap: 0.4rem;
    font-weight: 600;
    color: var(--text);
}

input,
select,
textarea,
button {
    font: inherit;
}

input,
select,
textarea {
    width: 100%;
    padding: 0.82rem 0.92rem;
    border: 1px solid var(--panel-strong);
    border-radius: 12px;
    background: rgba(5, 12, 24, 0.82);
    color: var(--text);
    outline: none;
    transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

body[data-theme="cyberpunk"] input,
body[data-theme="cyberpunk"] select,
body[data-theme="cyberpunk"] textarea {
    background: rgba(11, 4, 18, 0.84);
}

body[data-theme="paper"] input,
body[data-theme="paper"] select,
body[data-theme="paper"] textarea {
    background: #fffdf6;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
    transform: translateY(-1px);
}

textarea {
    resize: vertical;
    min-height: 110px;
}

select {
    appearance: none;
}

button,
a.button-link,
a.button-link:visited,
a.button-link:hover,
a.button-link:active,
a.button-link:focus {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.82rem 1.1rem;
    border: 1px solid transparent;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: var(--button-text);
    text-decoration: none;
    cursor: pointer;
    font-weight: 700;
    letter-spacing: 0.02em;
    box-shadow: 0 12px 30px var(--accent-glow);
    transition: transform 160ms ease, box-shadow 160ms ease, filter 160ms ease;
}

button:hover,
a.button-link:hover,
a.button-link:focus {
    transform: translateY(-1px);
    filter: saturate(1.08);
    box-shadow: 0 16px 38px var(--accent-glow);
}

.inline-form {
    display: inline;
    margin: 0;
}

.link-button {
    background: transparent;
    color: var(--text);
    padding: 0.45rem 0.8rem;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    font-weight: 500;
    box-shadow: none;
}

.alert {
    padding: 0.9rem 1rem;
    border-radius: 14px;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    box-shadow: var(--shadow-sm);
}

.alert.error {
    background: rgba(127, 29, 29, 0.32);
    border-color: rgba(251, 113, 133, 0.35);
    color: var(--error-ink);
}

.alert.success {
    background: rgba(6, 78, 59, 0.34);
    border-color: rgba(52, 211, 153, 0.3);
    color: var(--success-ink);
}

.muted {
    color: var(--muted);
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-weight: 500;
}

.checkbox-row input {
    width: 1.05rem;
    height: 1.05rem;
    accent-color: var(--accent-strong);
}

.row-between {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
}

.guide-list,
.dashboard-grid {
    display: grid;
    gap: 1rem;
}

.dashboard-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.guide-item {
    padding: 1rem;
    border: 1px solid var(--panel-border);
    border-radius: 16px;
    background: var(--bg-soft);
    box-shadow: var(--shadow-sm);
}

.guide-item h3,
.card h2,
.card h3 {
    margin-top: 0;
    font-family: var(--font-display);
    letter-spacing: 0.03em;
}

.actions-column {
    display: grid;
    gap: 0.75rem;
    align-content: start;
}

.inline-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

.dark-link {
    color: var(--text);
}

.danger-button {
    background: linear-gradient(135deg, var(--danger), var(--danger-strong));
    color: #fff2f5;
    box-shadow: 0 12px 28px rgba(225, 29, 72, 0.3);
}

.subtle-card {
    background: rgba(255, 255, 255, 0.03);
    box-shadow: none;
    border: 1px solid var(--panel-border);
}

.question-fields-panel[hidden],
.question-fields-panel.is-hidden {
    display: none;
}

.choice-row {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.85rem;
    border: 1px solid var(--panel-border);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.03);
}

.choice-row input {
    width: auto;
    margin-top: 0.2rem;
}

.theme-hub {
    position: relative;
}

.theme-launcher {
    min-width: 0;
    padding: 0.55rem 0.85rem;
    box-shadow: none;
}

.theme-launcher-short {
    display: none;
}

.theme-switcher {
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    min-width: 180px;
    display: grid;
    gap: 0.35rem;
    padding: 0.45rem;
    border-radius: 18px;
    border: 1px solid var(--panel-border);
    background: rgba(7, 12, 24, 0.94);
    box-shadow: var(--shadow-lg);
    z-index: 30;
}

.theme-switcher[hidden] {
    display: none;
}

body[data-theme="cyberpunk"] .theme-switcher {
    background: rgba(12, 4, 18, 0.94);
}

body[data-theme="paper"] .site-header,
body[data-theme="paper"] .theme-switcher {
    background: rgba(247, 241, 226, 0.96);
}

body[data-theme="paper"] .page-aura,
body[data-theme="paper"] .scanlines {
    display: none;
}

.sob-content {
    max-width: 850px;
    margin: 1.5rem auto 0;
    line-height: 1.72;
}

.sob-content h2 {
    margin: 2rem 0 0.7rem;
    padding-bottom: 0.45rem;
    border-bottom: 1px solid var(--panel-border);
}

.sob-content h3 {
    margin: 1.5rem 0 0.45rem;
}

.sob-content p {
    margin: 0.45rem 0;
}

.sob-bullet-list {
    margin: 0.55rem 0 0.9rem;
    padding-left: 1.6rem;
}

.sob-bullet-list li {
    margin: 0.35rem 0;
}

.sob-search {
    max-width: 680px;
    margin: 1.5rem auto 0;
}

.sob-editor {
    min-height: 34rem;
    font-family: var(--font-mono);
    line-height: 1.55;
}

.sob-updated {
    margin-top: 2rem;
    text-align: right;
}

.sob-revision-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.sob-revision-row p {
    margin: 0.25rem 0;
}

.guide-progress {
    display: grid;
    gap: 0.4rem;
    margin: 0.9rem 0;
}

.guide-progress progress {
    width: 100%;
    height: 0.65rem;
    accent-color: var(--accent);
}

.editor-picker {
    margin: 0;
    padding: 1rem;
    border: 1px solid var(--panel-border);
    border-radius: 14px;
}

.editor-picker legend {
    padding: 0 0.4rem;
    font-weight: 700;
}

.editor-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.65rem;
}

.editor-option {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    background: var(--bg-soft);
}

.editor-option input {
    width: auto;
    margin: 0;
}

.theme-toggle {
    width: 100%;
    padding: 0.7rem 0.85rem;
    border-radius: 12px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--muted);
    box-shadow: none;
    justify-content: flex-start;
}

.theme-toggle.is-active {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
    border-color: var(--panel-strong);
}

.hero-card {
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
    gap: 1rem;
    align-items: stretch;
}

.compact-hero-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hero-copy,
.hero-panel,
.feature-panel,
.stat-tile,
.inset-panel {
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 60ch;
    color: var(--muted);
}

.hero-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.hero-panel {
    padding: 1rem;
    border-radius: 18px;
    border: 1px solid var(--panel-border);
    background: rgba(255, 255, 255, 0.04);
    display: grid;
    align-content: center;
    gap: 0.4rem;
}

.terminal-label {
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.72rem;
}

.signal-readout {
    display: grid;
    gap: 0.9rem;
}

.signal-value {
    display: inline-block;
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    letter-spacing: 0.08em;
    color: var(--accent);
    text-shadow: 0 0 18px var(--accent-glow);
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.section-row-gap {
    margin-bottom: 1rem;
}

.import-commit-action {
    margin-top: 1.25rem;
}

.study-reset-panel {
    display: flex;
    align-items: flex-start;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.7rem;
    border-radius: 999px;
    border: 1px solid var(--panel-strong);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.success-pill {
    border-color: rgba(52, 211, 153, 0.4);
    color: var(--success);
}

.warning-pill {
    border-color: rgba(251, 113, 133, 0.4);
    color: var(--danger);
}

.secondary-button,
.secondary-button:visited,
.secondary-button:hover,
.secondary-button:active,
.secondary-button:focus {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    border-color: var(--panel-strong);
    box-shadow: none;
}

.stat-tile h3 {
    margin-bottom: 0;
    font-size: clamp(1.7rem, 4vw, 2.5rem);
}

.neon-choice:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent-glow), 0 10px 24px rgba(0, 0, 0, 0.18);
}

.inset-panel {
    margin-block: 1rem;
}

.feedback-shell {
    display: grid;
    gap: 1rem;
}

.feedback-flag {
    display: grid;
    gap: 0.3rem;
    padding: 1rem 1.1rem;
    border-radius: 18px;
    border: 1px solid var(--panel-strong);
    background: rgba(255, 255, 255, 0.04);
}

.feedback-flag-success {
    border-color: rgba(52, 211, 153, 0.34);
    background: linear-gradient(135deg, rgba(6, 78, 59, 0.4), rgba(255, 255, 255, 0.03));
}

.feedback-flag-error {
    border-color: rgba(251, 113, 133, 0.34);
    background: linear-gradient(135deg, rgba(127, 29, 29, 0.36), rgba(255, 255, 255, 0.03));
}

.feedback-flag-label,
.feedback-label {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.feedback-flag-copy,
.feedback-answer-text,
.feedback-explanation-copy {
    margin: 0;
    line-height: 1.6;
}

.feedback-question-block {
    display: grid;
    gap: 0.45rem;
}

.feedback-question {
    margin: 0;
    font-size: clamp(1.2rem, 2.4vw, 1.65rem);
    line-height: 1.35;
}

.feedback-answer-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
}

.feedback-answer-card {
    display: grid;
    gap: 0.5rem;
    align-content: start;
    min-height: 0;
}

.feedback-explanation {
    margin: 0;
    padding: 1.1rem 1.2rem;
    border-color: var(--panel-strong);
    background:
        linear-gradient(135deg, rgba(94, 234, 212, 0.08), transparent 50%),
        rgba(255, 255, 255, 0.03);
}

body[data-theme="cyberpunk"] .feedback-explanation {
    background:
        linear-gradient(135deg, rgba(255, 47, 179, 0.1), transparent 50%),
        rgba(255, 255, 255, 0.03);
}

.feedback-actions {
    margin: 0.25rem 0 0;
}

::placeholder {
    color: color-mix(in srgb, var(--muted) 75%, transparent);
}

@media (max-width: 720px) {
    .site-header-inner,
    .header-controls,
    .site-header nav {
        align-items: flex-start;
    }

    .header-controls {
        width: 100%;
        justify-content: space-between;
    }

    .page-content {
        padding: 1.4rem 1rem 3rem;
    }

    .card {
        padding: 1rem;
        border-radius: 18px;
    }

    button,
    a.button-link,
    a.button-link:visited,
    a.button-link:hover,
    a.button-link:active,
    a.button-link:focus {
        width: 100%;
    }

    .inline-actions,
    .actions-column {
        width: 100%;
    }

    .hero-grid,
    .compact-hero-grid,
    .feedback-answer-grid {
        grid-template-columns: 1fr;
    }

    .theme-launcher {
        padding-inline: 0.75rem;
    }

    .theme-launcher-full {
        display: none;
    }

    .theme-launcher-short {
        display: inline;
    }

    .theme-switcher {
        right: 0;
        left: auto;
        min-width: 150px;
    }
}