:root {
    --bg-color: #f8fafc;
    --bg-secondary: #ffffff;
    --card-bg: #ffffff;
    --card-bg-hover: #f1f5f9;
    --card-border: #e2e8f0;
    --text-heading: #0f172a;
    --text-main: #334155;
    --text-muted: #64748b;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-glow: rgba(37,99,235,0.12);
    --success: #059669;
    --success-glow: rgba(5,150,105,0.1);
    --warning: #d97706;
    --error: #dc2626;
    --vk-color: #3b82f6;
    --tg-color: #0ea5e9;
    --tt-color: #f43f5e;
    --platform-color: var(--accent);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08),0 2px 4px -2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08),0 4px 6px -4px rgba(0,0,0,0.06);
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    font-family: 'Inter','Segoe UI',system-ui,sans-serif;
    background: var(--bg-color);
    color: var(--text-main);
    line-height: 1.65;
    overflow-x: hidden;
    min-height: 100vh
}

a {
    text-decoration: none;
    color: inherit
}

ul {
    list-style: none
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px
}

header {
    padding: 16px 0;
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    background: rgba(248,250,252,0.85);
    backdrop-filter: blur(12px);
    z-index: 100
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center
}

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

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 8px
}

    .logo span {
        color: var(--text-heading)
    }

.back-btn, .back-to-top {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-muted);
    font-size: .875rem;
    border: 1px solid var(--card-border);
    cursor: pointer
}

    .back-btn:hover, .back-to-top:hover {
        background: var(--card-bg-hover);
        color: var(--text-main)
    }

.btn-header {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    background: var(--accent-glow);
    color: var(--accent);
    font-size: .875rem;
    font-weight: 600;
    border: 1px solid rgba(37,99,235,0.25);
    cursor: pointer
}

    .btn-header:hover {
        background: var(--accent);
        color: #fff;
        border-color: var(--accent);
        transform: translateY(-1px);
        box-shadow: var(--shadow-sm)
    }

.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    opacity: 0;
    visibility: hidden;
    z-index: 1000
}

    .back-to-top.show {
        opacity: 1;
        visibility: visible
    }

.page-header {
    padding: 60px 0 32px;
    text-align: center
}

.platform-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent-glow);
    color: var(--platform-color);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: .8rem;
    font-weight: 600;
    margin-bottom: 16px;
    border: 1px solid rgba(37,99,235,0.15)
}

.page-header h1 {
    font-size: 2rem;
    margin-bottom: 12px;
    line-height: 1.25;
    color: var(--text-heading);
    font-weight: 700
}

.page-header p {
    color: var(--text-muted);
    max-width: 580px;
    margin: 0 auto;
    font-size: 1rem
}

.steps-section {
    margin-bottom: 56px;
    scroll-margin-top: 100px
}

.page-action {
    display: flex;
    justify-content: center;
    width: 100%;
    padding: 24px 0;
    margin: 40px 0
}

    .page-action .btn-header {
        min-width: 160px
    }

.btn-header:disabled, .btn-header.btn-disabled {
    opacity: 0.4;
    cursor: not-allowed
}

.btn-success {
    background: var(--success-glow);
    border-color: rgba(5,150,105,0.35);
    color: var(--success)
}

    .btn-success:hover {
        background: var(--success);
        color: #fff;
        border-color: var(--success)
    }

.step-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--card-border);
    overflow: hidden;
    box-shadow: var(--shadow-sm)
}

.step-header {
    padding: 28px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    gap: 18px
}

.step-header-text h2, .step-header-text h3 {
    margin: 0;
    color: var(--text-heading)
}

.step-header-text h2 {
    font-size: 1.4rem;
    margin-bottom: 4px
}

.step-header-text h3 {
    font-size: 1.3rem;
    margin-bottom: 4px
}

.step-header-text .tagline {
    color: var(--accent);
    font-size: .8rem;
    font-weight: 600;
    display: block;
    margin-bottom: 4px
}

.step-instruction {
    padding: 28px
}

    .step-instruction p {
        color: var(--text-muted);
        margin-bottom: 14px;
        line-height: 1.7
    }

.step-card {
    margin-bottom: 48px; 
}

@media (max-width: 768px) {
    .step-card {
        margin-bottom: 24px;
    }
}

.path-box {
    background: var(--bg-secondary);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-family: 'JetBrains Mono',Consolas,monospace;
    font-size: .875rem;
    color: var(--text-main);
    border-left: 3px solid var(--platform-color);
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px
}

    .path-box .arrow {
        color: var(--accent)
    }

.tip-box {
    background: var(--success-glow);
    border: 1px solid rgba(5,150,105,0.2);
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-top: 18px
}

    .tip-box h4 {
        color: var(--success);
        margin-bottom: 6px;
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: .95rem
    }

.hero {
    padding: 100px 0 80px;
    text-align: center;
    background: radial-gradient(circle at 50% 0,#eef2ff 0,var(--bg-color) 70%)
}

    .hero h1 {
        font-size: 2.8rem;
        margin-bottom: 18px;
        line-height: 1.2;
        color: var(--text-heading)
    }

        .hero h1 span {
            color: var(--accent)
        }

    .hero p {
        font-size: 1.1rem;
        color: var(--text-muted);
        max-width: 680px;
        margin: 0 auto 36px
    }

.btn {
    display: inline-block;
    padding: 12px 28px;
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-md);
    font-weight: 600;
    border: none;
    cursor: pointer
}

    .btn:hover {
        background: var(--accent-hover);
        transform: translateY(-2px);
        box-shadow: 0 4px 14px var(--accent-glow)
    }

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(200px,1fr));
    gap: 18px;
    margin-bottom: 80px;
    text-align: center
}

.stat-item {
    background: var(--card-bg);
    padding: 22px 16px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border)
}

    .stat-item:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-md)
    }

.stat-number {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
    display: block;
    margin-bottom: 6px
}

.stat-desc {
    font-size: .875rem;
    color: var(--text-muted)
}

.infographic-section {
    padding: 80px 0 100px
}

.section-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--text-heading)
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 56px;
    font-size: 1rem
}

.steps-timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    max-width: 860px;
    margin: 0 auto
}

    .steps-timeline::before {
        content: '';
        position: absolute;
        left: 38px;
        top: 28px;
        bottom: 28px;
        width: 2px;
        background: linear-gradient(to bottom,var(--accent),var(--vk-color),var(--warning),var(--tt-color));
        border-radius: 2px;
        z-index: 0;
        opacity: 0.35
    }

.step-item {
    display: flex;
    gap: 28px;
    align-items: flex-start;
    padding: 18px 0;
    position: relative
}

.step-marker {
    flex-shrink: 0;
    width: 76px;
    height: 76px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
    border: 4px solid var(--bg-color);
    box-shadow: 0 0 0 2px var(--card-border)
}

    .step-marker .step-icon {
        font-size: 1.8rem
    }

.step-content {
    flex: 1;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--card-border);
    z-index: 2
}

    .step-content:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-md)
    }

.step-number {
    display: inline-block;
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 8px;
    padding: 4px 10px;
    border-radius: 999px
}

.step-content h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text-heading)
}

.step-content p {
    color: var(--text-muted);
    font-size: .92rem;
    line-height: 1.7
}

.step-item[data-color="green"] .step-marker {
    background: linear-gradient(135deg,#10b981,#059669)
}

.step-item[data-color="green"] .step-number {
    background: var(--success-glow);
    color: var(--success)
}

.step-item[data-color="blue"] .step-marker {
    background: linear-gradient(135deg,#3b82f6,#2563eb)
}

.step-item[data-color="blue"] .step-number {
    background: rgba(59,130,246,0.12);
    color: #2563eb
}

.step-item[data-color="orange"] .step-marker {
    background: linear-gradient(135deg,#f59e0b,#d97706)
}

.step-item[data-color="orange"] .step-number {
    background: rgba(245,158,11,0.12);
    color: #d97706
}

.step-item[data-color="purple"] .step-marker {
    background: linear-gradient(135deg,#8b5cf6,#7c3aed)
}

.step-item[data-color="purple"] .step-number {
    background: rgba(139,92,246,0.12);
    color: #7c3aed
}

.step-tips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px
}

.step-tip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: var(--bg-secondary);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: .8rem;
    color: var(--text-muted);
    border: 1px solid var(--card-border)
}

.platforms-section {
    padding: 70px 0 100px;
    background: var(--bg-secondary)
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
    gap: 24px
}

.platform-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    border: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    justify-content: space-between
}

    .platform-card:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-lg)
    }

.platform-icon-wrapper {
    width: 72px;
    height: 72px;
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-secondary)
}

.platform-svg {
    width: 100%;
    height: 100%
}

.platform-card h3 {
    font-size: 1.35rem;
    margin-bottom: 10px;
    color: var(--text-heading)
}

.platform-card p {
    color: var(--text-muted);
    margin-bottom: 22px;
    font-size: .9rem
}

.platform-btn {
    display: block;
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-main);
    font-weight: 600;
    border: 1px solid var(--card-border)
}

.vk-card .platform-btn:hover {
    background: var(--vk-color);
    border-color: var(--vk-color);
    color: #fff
}

.tg-card .platform-btn:hover {
    background: var(--tg-color);
    border-color: var(--tg-color);
    color: #fff
}

.tt-card .platform-btn:hover {
    background: var(--tt-color);
    border-color: var(--tt-color);
    color: #fff
}

.checklist-section {
    padding: 60px 0 80px
}

.checklist-progress {
    margin-bottom: 22px;
    text-align: center
}

.progress-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 8px;
    border: 1px solid var(--card-border)
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg,var(--accent),var(--vk-color));
    width: 0
}

.progress-text {
    font-size: .85rem;
    color: var(--text-muted);
    font-weight: 500
}

.checklist-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 780px;
    margin: 0 auto
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--card-bg);
    padding: 16px 18px;
    border-radius: var(--radius-md);
    border: 1px solid var(--card-border);
    cursor: pointer;
    user-select: none
}

    .checklist-item:hover {
        background: var(--card-bg-hover)
    }

    .checklist-item.completed {
        background: var(--success-glow);
        border-color: rgba(5,150,105,0.25)
    }

    .checklist-item input[type="checkbox"] {
        appearance: none;
        width: 22px;
        height: 22px;
        border: 2px solid var(--text-muted);
        border-radius: 6px;
        cursor: pointer;
        position: relative;
        flex-shrink: 0;
        background: transparent
    }

        .checklist-item input[type="checkbox"]:checked {
            background: var(--accent);
            border-color: var(--accent)
        }

            .checklist-item input[type="checkbox"]:checked::after {
                content: '✓';
                position: absolute;
                top: 50%;
                left: 50%;
                transform: translate(-50%,-50%);
                color: #fff;
                font-size: 13px;
                font-weight: 700
            }

    .checklist-item label {
        cursor: pointer;
        flex: 1;
        font-size: .95rem;
        color: var(--text-main)
    }

    .checklist-item.completed label {
        text-decoration: line-through;
        color: var(--text-muted);
        opacity: .85
    }

.quiz-section .quiz-form {
    display: flex;
    flex-direction: column;
    gap: 22px;
    max-width: 740px;
    margin: 0 auto
}

.quiz-question {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 24px
}

    .quiz-question h3 {
        margin-bottom: 16px;
        color: var(--text-heading);
        font-size: 1.1rem
    }

    .quiz-question label {
        display: block;
        margin-bottom: 10px;
        padding: 12px 14px;
        border-radius: var(--radius-md);
        background: var(--bg-secondary);
        cursor: pointer;
        border: 1px solid transparent
    }

        .quiz-question label:hover {
            background: var(--card-bg-hover);
            border-color: var(--card-border)
        }

    .quiz-question input {
        margin-right: 10px;
        accent-color: var(--accent)
    }

.quiz-result {
    background: var(--success-glow);
    border: 1px solid rgba(5,150,105,0.25);
    border-radius: var(--radius-lg);
    padding: 20px;
    color: var(--text-main)
}

    .quiz-result h4 {
        margin-top: 0;
        color: var(--success)
    }

.quiz-error {
    color: var(--warning);
    font-weight: 600
}

.scenario-quiz {
    display: flex;
    flex-direction: column;
    gap: 10px
}

.quiz-btn {
    display: block;
    width: 100%;
    text-align: left;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--card-border);
    background: var(--bg-secondary);
    color: var(--text-main);
    font-size: .95rem;
    cursor: pointer
}

    .quiz-btn:hover {
        background: var(--card-bg-hover);
        transform: translateY(-1px)
    }

.quiz-correct {
    border-color: rgba(5,150,105,0.4);
    background: rgba(5,150,105,0.08)
}

.quiz-wrong {
    border-color: rgba(220,38,38,0.4);
    background: rgba(220,38,38,0.08)
}

footer {
    padding: 48px 0;
    border-top: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: .875rem
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 24px;
    align-items: center
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 6px
}

    .footer-links p {
        margin: 0 0 6px;
        font-weight: 600;
        color: var(--text-heading)
    }

    .footer-links a {
        color: var(--text-muted)
    }

        .footer-links a:hover {
            color: var(--accent)
        }

@media(max-width:680px) {
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center
    }

    .footer-links {
        align-items: center
    }
}

.interactive-section {
    padding: 80px 0 100px
}

.interactive-card {
    margin-bottom: 26px
}

    .interactive-card:last-child {
        margin-bottom: 0
    }

.interactive-section .step-instruction {
    padding-top: 22px
}

.drop-zones {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 10px;
    align-items: stretch
}

.drop-zone {
    min-height: 280px;
    display: flex;
    flex-direction: column;
    padding: 16px;
    background: var(--bg-secondary);
    border: 2px dashed var(--card-border);
    border-radius: var(--radius-lg)
}

    .drop-zone h4 {
        margin: 0 0 14px 4px;
        color: var(--text-heading);
        font-size: 1rem
    }

.zone-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    flex: 1;
    align-content: flex-start
}

.drag-game {
    display: grid;
    gap: 14px
}

.cards {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    min-height: 48px
}

.drag-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    cursor: grab;
    user-select: none;
    color: var(--text-main);
    font-size: .9rem
}

    .drag-card:hover {
        background: var(--card-bg-hover)
    }

.compare-game {
    display: grid;
    gap: 10px
}

.compare-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 12px;
    align-items: center;
    margin-bottom: 10px
}

    .compare-row span {
        color: var(--text-muted);
        font-weight: 700;
        text-align: center
    }

.compare-btn {
    background: var(--bg-secondary);
    color: var(--text-main);
    border: 1px solid var(--card-border);
    padding: 12px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: inherit
}

    .compare-btn:hover {
        background: var(--card-bg-hover)
    }

.password-output {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 14px
}

#passwordInput {
    flex: 1;
    min-width: 240px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--card-border);
    background: var(--bg-secondary);
    color: var(--text-heading);
    outline: none;
    font-family: inherit;
    font-size: 1rem
}

    #passwordInput:focus {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px var(--accent-glow)
    }

.password-parts {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 14px 0
}

.password-criterion {
    background: transparent;
    border: 1px solid var(--card-border);
    padding: 6px 10px;
    border-radius: 8px;
    cursor: default;
    user-select: none;
    color: var(--text-muted);
    font-size: .82rem;
    font-weight: 500
}

    .password-criterion.active {
        color: var(--accent);
        background: var(--accent-glow);
        border-color: rgba(37,99,235,0.25)
    }

.password-meter {
    margin-top: 10px
}

.meter-bar {
    width: 100%;
    height: 10px;
    background: var(--bg-secondary);
    border-radius: 999px;
    overflow: hidden;
    border: 1px solid var(--card-border)
}

.meter-fill {
    height: 100%;
    width: 0;
    background: var(--error);
    border-radius: 999px
}

.meter-text {
    margin-top: 6px;
    color: var(--text-muted);
    font-size: .85rem
}

.password-tester-card {
    margin: 40px 0
}

.info-card {
    margin-bottom: 28px;
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 24px
}

.requirements-list {
    display: flex;
    flex-direction: column;
    gap: 14px
}

.requirement-item {
    display: flex;
    gap: 14px;
    padding: 14px;
    background: var(--card-bg);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-md);
    align-items: flex-start
}

.requirement-icon {
    font-size: 1.2rem;
    font-weight: bold;
    min-width: 28px;
    text-align: center
}

.requirement-content h4 {
    margin-bottom: 4px;
    font-size: .95rem;
    color: var(--text-heading)
}

.requirement-content p {
    color: var(--text-muted);
    font-size: .875rem;
    margin: 0
}

.examples-list {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
    gap: 18px
}

.example-item {
    padding: 18px;
    border-radius: var(--radius-md);
    border: 1px solid
}

    .example-item.good {
        background: var(--success-glow);
        border-color: rgba(5,150,105,0.25)
    }

        .example-item.good:hover {
            border-color: var(--success);
            background: rgba(5,150,105,0.12);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm)
        }

    .example-item.bad {
        background: rgba(220,38,38,0.08);
        border-color: rgba(220,38,38,0.25)
    }

        .example-item.bad:hover {
            border-color: var(--error);
            background: rgba(220,38,38,0.12);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm)
        }

.example-password {
    font-family: 'JetBrains Mono',monospace;
    font-size: 1rem;
    font-weight: 600;
    word-break: break-all;
    padding: 10px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 10px;
    color: var(--text-heading);
    border: 1px solid var(--card-border)
}

.example-label {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 600;
    margin-bottom: 8px
}

.example-item.good .example-label {
    background: rgba(5,150,105,0.2);
    color: var(--success)
}

.example-item.bad .example-label {
    background: rgba(220,38,38,0.2);
    color: var(--error)
}

.example-item p {
    color: var(--text-muted);
    font-size: .875rem;
    margin: 0
}

.view-switcher {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin: 36px 0;
    padding: 18px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border)
}

.switch-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    background: transparent;
    border: 1px solid var(--card-border);
    user-select: none;
    font-weight: 500;
    color: var(--text-muted)
}

    .switch-label:hover {
        background: var(--card-bg);
        color: var(--text-main)
    }

    .switch-label input[type="radio"] {
        appearance: none;
        width: 16px;
        height: 16px;
        border-radius: 50%;
        border: 2px solid var(--text-muted);
        cursor: pointer;
        background: transparent
    }

        .switch-label input[type="radio"]:hover {
            border-color: var(--platform-color)
        }

        .switch-label input[type="radio"]:checked {
            background: var(--platform-color);
            border-color: var(--platform-color);
            box-shadow: 0 0 0 3px var(--accent-glow)
        }

            .switch-label input[type="radio"]:checked + span {
                color: var(--platform-color);
                font-weight: 600
            }

.screenshots-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
    justify-content: center;
    align-items: flex-start
}

.screenshot {
    display: none;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border);
    background: var(--bg-secondary);
    width: min(100%,450px);
    aspect-ratio: 4/3
}

    .screenshot img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        cursor: zoom-in
    }

body.view-phone .screenshot.phone, body.view-pc .screenshot.pc {
    display: block
}

body.tt-page .screenshot {
    display: block
}

.image-lightbox {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    background: rgba(0,0,0,0.75);
    backdrop-filter: blur(8px)
}

    .image-lightbox:not(.hidden) {
        opacity: 1;
        pointer-events: auto
    }

    .image-lightbox .lightbox-backdrop {
        position: absolute;
        inset: 0;
        background: transparent
    }

    .image-lightbox .lightbox-content {
        position: relative;
        width: min(960px,calc(100vw - 24px));
        max-height: calc(100vh - 24px);
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden
    }

    .image-lightbox .lightbox-frame {
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center
    }

        .image-lightbox .lightbox-frame img {
            max-width: 90vw;
            max-height: 90vh;
            object-fit: contain;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg)
        }

    .image-lightbox button {
        position: absolute;
        border: none;
        background: rgba(255,255,255,0.15);
        color: #0f172a;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.1rem;
        backdrop-filter: blur(4px)
    }

        .image-lightbox button:hover {
            background: rgba(255,255,255,0.3)
        }

    .image-lightbox .lightbox-close {
        top: 16px;
        right: 16px
    }

    .image-lightbox .lightbox-prev {
        left: 16px;
        top: 50%;
        transform: translateY(-50%)
    }

    .image-lightbox .lightbox-next {
        right: 16px;
        top: 50%;
        transform: translateY(-50%)
    }

    .image-lightbox .lightbox-counter {
        position: absolute;
        bottom: 16px;
        left: 50%;
        transform: translateX(-50%);
        color: #fff;
        font-size: .875rem;
        padding: 5px 10px;
        background: rgba(0,0,0,0.6);
        border-radius: 999px;
        backdrop-filter: blur(4px)
    }

    .image-lightbox .lightbox-content:not(.has-controls) .lightbox-prev,
    .image-lightbox .lightbox-content:not(.has-controls) .lightbox-next {
        display: none
    }

.settings-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-muted);
    border: 1px solid var(--card-border)
}

    .settings-btn:hover {
        background: var(--card-bg-hover);
        color: var(--accent);
        transform: rotate(45deg)
    }

    .settings-btn svg {
        width: 20px;
        height: 20px;
        stroke: currentColor;
        fill: none;
        stroke-width: 2;
        stroke-linecap: round;
        stroke-linejoin: round
    }

.settings-page {
    min-height: 75vh;
    padding: 60px 0 80px
}

.settings-container {
    width: 100%;
    max-width: 580px;
    margin: 0 auto
}

.settings-header {
    text-align: center;
    margin-bottom: 40px
}

    .settings-header h1 {
        font-size: 2.2rem;
        margin-bottom: 8px;
        color: var(--text-heading)
    }

    .settings-header p {
        color: var(--text-muted);
        font-size: 1rem
    }

.settings-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: 32px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-md)
}

.settings-section {
    margin-bottom: 28px
}

    .settings-section:last-child {
        margin-bottom: 0
    }

.section-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 18px;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 10px
}

    .section-title::before {
        content: '';
        width: 4px;
        height: 20px;
        background: var(--accent);
        border-radius: 2px
    }

.theme-control {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border)
}

.theme-info {
    display: flex;
    flex-direction: column;
    gap: 4px
}

.theme-name {
    font-weight: 600;
    color: var(--text-heading);
    font-size: 1rem
}

.theme-desc {
    font-size: .85rem;
    color: var(--text-muted)
}

.theme-buttons {
    display: flex;
    gap: 10px
}

.theme-option {
    border: 1px solid var(--card-border);
    background: transparent;
    color: var(--text-main);
    padding: 10px 18px;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 600
}

    .theme-option:hover {
        background: var(--card-bg-hover)
    }

    .theme-option.active {
        background: var(--accent);
        color: #fff;
        border-color: var(--accent)
    }

@media(max-width:900px) {
    .steps-nav {
        justify-content: flex-start;
        padding: 10px 0 28px;
        overflow-x: auto;
        flex-wrap: nowrap
    }

        .steps-nav a {
            flex: 0 0 auto
        }
}

@media(max-width:768px) {
    header {
        padding: 14px 0
    }

    .hero {
        padding: 60px 0 50px
    }

        .hero h1 {
            font-size: 2.1rem
        }

        .hero p {
            font-size: 1rem
        }

    .page-header h1 {
        font-size: 1.7rem
    }

    .step-header {
        padding: 20px;
        flex-direction: column;
        align-items: flex-start;
        gap: 14px
    }

    .step-instruction {
        padding: 20px
    }

    .steps-timeline::before {
        left: 26px
    }

    .step-item {
        gap: 14px
    }

    .step-marker {
        width: 54px;
        height: 54px
    }

        .step-marker .step-icon {
            font-size: 1.3rem
        }

    .step-content {
        padding: 20px
    }

        .step-content h3 {
            font-size: 1.1rem
        }

    .step-tips {
        flex-direction: column
    }

    .stats {
        gap: 12px;
        margin-bottom: 60px
    }

    .drop-zones {
        grid-template-columns: 1fr
    }

    .compare-row {
        grid-template-columns: 1fr
    }

    .password-output {
        flex-direction: column
    }

    #passwordInput {
        min-width: 100%
    }

    .checklist-item {
        padding: 14px 16px
    }
}

@media(max-width:600px) {
    .settings-card {
        padding: 24px
    }

    .theme-control {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px
    }

    .settings-header h1 {
        font-size: 1.8rem
    }
}

@media(max-width:480px) {
    .container {
        padding: 0 16px
    }

    .hero h1 {
        font-size: 1.6rem
    }

    .steps-timeline::before {
        display: none
    }

    .step-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 14px;
        margin-bottom: 18px
    }

    .step-content {
        width: 100%
    }

    .step-tips {
        justify-content: center;
        flex-direction: row;
        flex-wrap: wrap
    }

    .stat-item {
        padding: 14px 12px
    }

    .stat-number {
        font-size: 1.8rem
    }

    .platform-card {
        padding: 28px 20px
    }

    .screenshot {
        width: 100%
    }

    .examples-list {
        grid-template-columns: 1fr
    }

    .requirement-item {
        padding: 12px;
        gap: 10px
    }

    .requirement-icon {
        font-size: 1.1rem;
        min-width: 22px
    }

    .requirement-content h4 {
        font-size: .9rem
    }

    .example-password {
        font-size: .9rem
    }

    .nav-wrapper {
        flex-wrap: wrap;
        gap: 10px
    }

    .btn-header {
        padding: 6px 12px;
        font-size: .8rem
    }

    .back-btn {
        padding: 6px 12px;
        font-size: .8rem
    }
}