.tutorial-home {
    --tutorial-line: rgba(255, 255, 255, 0.10);
    --tutorial-panel: rgba(16, 19, 31, 0.86);
    --tutorial-panel-strong: #121625;
    --tutorial-purple: #9b82ff;
    --tutorial-cyan: #67e8f9;
    --tutorial-green: #49d6a2;
    min-height: 100vh;
    color: var(--text);
}

.tutorial-home a {
    color: inherit;
    text-decoration: none;
}

.tutorial-home [id] {
    scroll-margin-top: 88px;
}

.tutorial-shell {
    width: min(1180px, calc(100% - 40px));
    margin-inline: auto;
}

.tutorial-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    min-height: 70px;
    padding: 12px max(20px, calc((100vw - 1180px) / 2));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    background: rgba(6, 7, 12, 0.88);
    border-bottom: 1px solid var(--tutorial-line);
    backdrop-filter: blur(18px);
}

.tutorial-brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    font-weight: 750;
    letter-spacing: 0.01em;
}

.tutorial-brand-mark {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(155, 130, 255, 0.58);
    border-radius: 12px;
    color: #fff;
    font-size: 0.78rem;
    background: linear-gradient(145deg, rgba(155, 130, 255, 0.35), rgba(103, 232, 249, 0.12));
    box-shadow: 0 10px 30px rgba(124, 111, 240, 0.18);
}

.tutorial-nav nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.tutorial-nav nav a {
    padding: 8px 13px;
    border-radius: 9px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition), background var(--transition);
}

.tutorial-nav nav a:hover,
.tutorial-nav nav a:focus-visible {
    color: #fff;
    background: rgba(255, 255, 255, 0.06);
}

.tutorial-nav nav a.tutorial-admin-link {
    margin-left: 4px;
    color: #fff;
    border: 1px solid rgba(103, 232, 249, 0.72);
    background: linear-gradient(135deg, rgba(124, 111, 240, 0.62), rgba(54, 184, 211, 0.38));
    box-shadow: 0 8px 24px rgba(103, 232, 249, 0.12);
    font-weight: 700;
}

.tutorial-nav nav a.tutorial-admin-link:hover,
.tutorial-nav nav a.tutorial-admin-link:focus-visible {
    background: linear-gradient(135deg, rgba(124, 111, 240, 0.78), rgba(54, 184, 211, 0.54));
}

.tutorial-hero {
    position: relative;
    overflow: hidden;
    padding: 100px 0 88px;
    border-bottom: 1px solid var(--tutorial-line);
}

.tutorial-hero::before {
    content: '';
    position: absolute;
    width: 560px;
    height: 560px;
    top: -250px;
    left: 56%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(124, 111, 240, 0.24), transparent 68%);
    pointer-events: none;
}

.tutorial-hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(330px, 0.65fr);
    gap: clamp(42px, 7vw, 94px);
    align-items: center;
}

.eyebrow,
.section-kicker {
    color: var(--tutorial-cyan);
    font-size: 0.78rem;
    font-weight: 750;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.eyebrow {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
}

.eyebrow span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--tutorial-green);
    box-shadow: 0 0 0 5px rgba(73, 214, 162, 0.1), 0 0 20px rgba(73, 214, 162, 0.5);
}

.tutorial-hero h1 {
    max-width: 760px;
    font-size: clamp(3rem, 7vw, 5.8rem);
    line-height: 0.98;
    letter-spacing: -0.065em;
}

.tutorial-hero h1 em {
    color: transparent;
    font-style: normal;
    background: linear-gradient(110deg, #b8a8ff 5%, var(--tutorial-purple) 45%, var(--tutorial-cyan));
    background-clip: text;
    -webkit-background-clip: text;
}

.hero-lead {
    max-width: 720px;
    margin-top: 28px;
    color: #b2bbce;
    font-size: clamp(1rem, 1.8vw, 1.16rem);
    line-height: 1.9;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 34px;
}

.tutorial-button {
    min-height: 46px;
    padding: 11px 19px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--tutorial-line);
    border-radius: 11px;
    font-weight: 720;
    transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.tutorial-button:hover {
    transform: translateY(-2px);
}

.tutorial-button.primary {
    color: #fff;
    border-color: rgba(155, 130, 255, 0.5);
    background: linear-gradient(135deg, #7855e8, #8f6cf2 52%, #6c88ea);
    box-shadow: 0 16px 38px rgba(114, 79, 225, 0.25);
}

.tutorial-button.secondary {
    color: #c9d0df;
    background: rgba(255, 255, 255, 0.04);
}

.hero-checklist {
    padding: 26px;
    border: 1px solid rgba(155, 130, 255, 0.22);
    border-radius: 22px;
    background: linear-gradient(160deg, rgba(28, 23, 49, 0.9), rgba(12, 16, 27, 0.88));
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
}

.checklist-title {
    margin-bottom: 14px;
    color: #d8d2ee;
    font-size: 0.86rem;
    font-weight: 720;
}

.hero-checklist ol {
    list-style: none;
}

.hero-checklist li {
    padding: 15px 0;
    display: grid;
    grid-template-columns: 42px 66px 1fr;
    align-items: center;
    gap: 8px;
    color: #b8c0d1;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.hero-checklist li span {
    color: var(--tutorial-purple);
    font-family: var(--font-mono);
    font-size: 0.76rem;
}

.hero-checklist li b {
    color: #fff;
}

.tutorial-section {
    padding: 88px 0;
}

.section-tinted {
    border-block: 1px solid rgba(255, 255, 255, 0.055);
    background: rgba(10, 12, 20, 0.58);
}

.section-heading {
    margin-bottom: 38px;
    display: flex;
    align-items: flex-start;
    gap: 18px;
}

.section-number {
    margin-top: 4px;
    color: var(--tutorial-purple);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.section-heading h2,
.tutorial-cta h2 {
    margin-top: 7px;
    font-size: clamp(2rem, 4.6vw, 3.4rem);
    line-height: 1.12;
    letter-spacing: -0.045em;
}

.three-card-grid,
.connection-grid,
.log-grid {
    display: grid;
    gap: 18px;
}

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

.tutorial-card,
.connection-card,
.log-card,
.acceptance-list,
.report-template,
.issue-examples {
    border: 1px solid var(--tutorial-line);
    border-radius: 18px;
    background: var(--tutorial-panel);
}

.tutorial-card {
    padding: 26px;
}

.card-icon {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    margin-bottom: 24px;
    border: 1px solid rgba(155, 130, 255, 0.36);
    border-radius: 12px;
    color: var(--tutorial-purple);
    font-family: var(--font-mono);
    font-weight: 800;
    background: rgba(155, 130, 255, 0.08);
}

.tutorial-card h3,
.connection-card h3,
.log-card h3,
.acceptance-list h3,
.issue-examples h3,
.troubleshooting h3 {
    font-size: 1.22rem;
}

.tutorial-card p,
.connection-card > p,
.test-ladder p {
    margin-top: 10px;
    color: var(--text-secondary);
    line-height: 1.75;
}

.notice {
    margin-top: 22px;
    padding: 16px 18px;
    border: 1px solid var(--tutorial-line);
    border-left-width: 3px;
    border-radius: 12px;
    color: #bac3d5;
    background: rgba(255, 255, 255, 0.035);
}

.notice strong {
    margin-right: 6px;
    color: #fff;
}

.notice.warning { border-left-color: var(--warning); background: rgba(251, 191, 36, 0.055); }
.notice.info { border-left-color: var(--tutorial-cyan); background: rgba(103, 232, 249, 0.045); }
.notice.danger { border-left-color: var(--error); background: rgba(248, 113, 113, 0.055); }
.notice.compact { margin-top: 24px; }

.decision-banner {
    margin-bottom: 22px;
    padding: 17px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    border: 1px solid rgba(103, 232, 249, 0.18);
    border-radius: 14px;
    background: rgba(103, 232, 249, 0.045);
}

.decision-banner > span {
    font-weight: 720;
}

.decision-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.decision-options a {
    padding: 7px 11px;
    border-radius: 8px;
    color: #b9dfe5;
    font-size: 0.86rem;
    background: rgba(255, 255, 255, 0.055);
}

.connection-grid,
.log-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.connection-card,
.log-card {
    position: relative;
    padding: 28px;
}

.connection-card.recommended {
    border-color: rgba(155, 130, 255, 0.32);
    background: linear-gradient(155deg, rgba(33, 27, 56, 0.86), rgba(15, 18, 30, 0.88));
}

.connection-label {
    display: inline-flex;
    margin-bottom: 16px;
    padding: 5px 9px;
    border-radius: 999px;
    color: #b9aaff;
    font-size: 0.72rem;
    font-weight: 760;
    background: rgba(155, 130, 255, 0.11);
}

.wiring-flow,
.makcu-diagram {
    margin: 24px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    flex-wrap: wrap;
}

.wiring-flow span,
.makcu-diagram span,
.makcu-diagram strong {
    padding: 10px 12px;
    border: 1px solid rgba(255, 255, 255, 0.11);
    border-radius: 10px;
    color: #f3f5fb;
    font-size: 0.82rem;
    background: rgba(255, 255, 255, 0.045);
}

.wiring-flow i,
.makcu-diagram b {
    color: var(--tutorial-cyan);
    font-size: 0.72rem;
    font-style: normal;
    font-weight: 650;
}

.makcu-diagram strong {
    color: #c7bbff;
    border-color: rgba(155, 130, 255, 0.3);
    background: rgba(155, 130, 255, 0.1);
}

.diagram-tail {
    margin: -10px 0 22px;
    color: #c3c9d8;
    text-align: center;
    font-size: 0.86rem;
}

.plain-steps {
    margin: 18px 0 0;
    padding-left: 1.25rem;
    color: #aeb7c9;
}

.plain-steps li {
    margin: 9px 0;
    padding-left: 4px;
}

.plain-steps.numbered li::marker {
    color: var(--tutorial-purple);
    font-family: var(--font-mono);
    font-weight: 750;
}

.figure-card {
    overflow: hidden;
    border: 1px solid var(--tutorial-line);
    border-radius: 20px;
    background: #0b0e17;
    box-shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
}

.figure-card img {
    display: block;
    width: 100%;
    height: auto;
}

.figure-card figcaption {
    padding: 15px 18px;
    color: #aab3c6;
    font-size: 0.88rem;
    border-top: 1px solid var(--tutorial-line);
}

.figure-card figcaption span {
    margin-right: 8px;
    color: var(--tutorial-purple);
    font-weight: 760;
}

.phone-shot {
    width: min(440px, 100%);
    margin: 30px auto 0;
}

.wide-shot {
    margin-top: 30px;
}

.launch-sequence {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.launch-sequence li {
    min-height: 150px;
    padding: 20px;
    display: flex;
    gap: 14px;
    border: 1px solid var(--tutorial-line);
    border-radius: 15px;
    background: var(--tutorial-panel);
}

.launch-sequence li > span,
.test-ladder article > span {
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: #fff;
    font-family: var(--font-mono);
    font-size: 0.76rem;
    background: #7655df;
}

.launch-sequence p {
    margin-top: 7px;
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.acceptance-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.6fr);
    align-items: start;
    gap: 28px;
}

.acceptance-grid .phone-shot {
    width: 100%;
    margin: 0;
}

.acceptance-list {
    padding: 28px;
}

.check-list {
    margin-top: 20px;
    list-style: none;
}

.check-list li {
    position: relative;
    margin: 13px 0;
    padding-left: 30px;
    color: #b6bfd1;
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--tutorial-green);
    font-weight: 800;
}

.test-ladder {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.test-ladder article {
    min-height: 180px;
    padding: 23px;
    border: 1px solid var(--tutorial-line);
    border-radius: 16px;
    background: var(--tutorial-panel);
}

.test-ladder h3 {
    margin-top: 22px;
    font-size: 1.02rem;
}

.log-card-head {
    display: flex;
    align-items: center;
    gap: 12px;
}

.log-card-head > span {
    padding: 5px 8px;
    border-radius: 7px;
    color: var(--tutorial-cyan);
    font-size: 0.72rem;
    font-weight: 780;
    background: rgba(103, 232, 249, 0.08);
}

.export-shot {
    overflow: hidden;
    margin-top: 24px;
    border: 1px solid var(--tutorial-line);
    border-radius: 12px;
    background: #fff;
}

.export-shot img {
    display: block;
    width: 100%;
    height: auto;
}

.file-stack {
    margin-top: 22px;
    display: grid;
    gap: 8px;
}

.file-stack span {
    padding: 11px 13px;
    border: 1px solid rgba(255, 255, 255, 0.075);
    border-radius: 9px;
    color: #c0c9d9;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    background: rgba(0, 0, 0, 0.18);
}

.log-card code,
.trouble-row code {
    overflow-wrap: anywhere;
    color: #c7bbff;
    font-family: var(--font-mono);
    font-size: 0.82em;
}

.feedback-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.75fr);
    gap: 18px;
}

.report-template,
.issue-examples {
    padding: 26px;
}

.report-title {
    margin-bottom: 16px;
    color: #d8d2ee;
    font-weight: 720;
}

.report-template pre {
    overflow-x: auto;
    padding: 20px;
    white-space: pre-wrap;
    color: #bdc6d7;
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 12px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.7;
    background: rgba(0, 0, 0, 0.22);
}

.bad-good {
    margin-top: 20px;
    display: grid;
    gap: 12px;
}

.bad-good div {
    padding: 17px;
    border: 1px solid var(--tutorial-line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.025);
}

.bad-good div:first-child b { color: #fda4af; }
.bad-good div:last-child b { color: var(--tutorial-green); }
.bad-good p { margin-top: 8px; color: var(--text-secondary); }

.troubleshooting {
    margin-top: 24px;
    overflow: hidden;
    border: 1px solid var(--tutorial-line);
    border-radius: 16px;
    background: var(--tutorial-panel);
}

.troubleshooting h3 {
    padding: 20px 22px;
    border-bottom: 1px solid var(--tutorial-line);
}

.trouble-row {
    padding: 15px 22px;
    display: grid;
    grid-template-columns: minmax(150px, 0.32fr) 1fr;
    gap: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.055);
}

.trouble-row:last-child { border-bottom: 0; }
.trouble-row b { color: #e4e7ef; }
.trouble-row span { color: var(--text-secondary); }

.tutorial-cta {
    padding: 70px 0;
    border-top: 1px solid var(--tutorial-line);
    background: linear-gradient(120deg, rgba(124, 111, 240, 0.12), rgba(103, 232, 249, 0.045));
}

.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.tutorial-cta h2 {
    max-width: 800px;
    font-size: clamp(1.75rem, 3.5vw, 2.8rem);
}

.tutorial-footer {
    min-height: 74px;
    padding: 20px max(20px, calc((100vw - 1180px) / 2));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--tutorial-line);
}

.tutorial-footer a:hover { color: var(--text-secondary); }

.tutorial-home a:focus-visible,
.tutorial-home button:focus-visible {
    outline: 2px solid var(--tutorial-cyan);
    outline-offset: 3px;
}

@media (max-width: 940px) {
    .tutorial-hero-grid,
    .acceptance-grid,
    .feedback-grid {
        grid-template-columns: 1fr;
    }

    .hero-checklist {
        max-width: 560px;
    }

    .three-card-grid {
        grid-template-columns: 1fr;
    }

    .launch-sequence,
    .test-ladder {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .acceptance-grid .phone-shot {
        width: min(430px, 100%);
        margin-inline: auto;
    }
}

@media (max-width: 700px) {
    .tutorial-shell { width: min(100% - 28px, 1180px); }

    .tutorial-nav {
        min-height: 62px;
        padding-inline: 14px;
        gap: 10px;
    }

    .tutorial-brand > span:last-child { display: none; }
    .tutorial-brand-mark { width: 36px; height: 36px; }
    .tutorial-nav nav { gap: 0; }
    .tutorial-nav nav a { padding: 7px 8px; font-size: 0.78rem; }
    .tutorial-nav nav a.tutorial-admin-link { margin-left: 2px; }

    .tutorial-hero {
        padding: 68px 0 60px;
    }

    .tutorial-hero-grid { grid-template-columns: 1fr; gap: 36px; }
    .tutorial-hero h1 { font-size: clamp(2.8rem, 15vw, 4.5rem); }
    .hero-lead { font-size: 0.98rem; line-height: 1.75; }
    .hero-actions { display: grid; }

    .tutorial-section { padding: 62px 0; }
    .section-heading { margin-bottom: 28px; }
    .section-heading h2 { font-size: 2rem; }

    .connection-grid,
    .log-grid,
    .launch-sequence,
    .test-ladder {
        grid-template-columns: 1fr;
    }

    .decision-banner,
    .cta-inner,
    .tutorial-footer {
        align-items: flex-start;
        flex-direction: column;
    }

    .decision-options { width: 100%; }
    .decision-options a { flex: 1 1 100%; }
    .connection-card,
    .log-card,
    .tutorial-card,
    .acceptance-list,
    .report-template,
    .issue-examples { padding: 21px; }

    .launch-sequence li,
    .test-ladder article { min-height: 0; }

    .trouble-row { grid-template-columns: 1fr; gap: 6px; }
    .tutorial-footer { padding: 22px 14px; }
}

@media (max-width: 520px) {
    .tutorial-nav nav a[href="#connect"],
    .tutorial-nav nav a[href="#start"] {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .tutorial-home *,
    .tutorial-home *::before,
    .tutorial-home *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}