/* POPO STORE – FIVEM CLOTHING MASTERCLASS */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #181818;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-hover: rgba(255, 255, 255, 0.09);
    --bg-sidebar: rgba(8, 8, 8, 0.97);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-glass: rgba(255, 255, 255, 0.12);
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --text-muted: #606060;
    --accent-cyan: #ffffff;
    --accent-purple: #d0d0d0;
    --accent-pink: #b0b0b0;
    --accent-orange: #e0e0e0;
    --accent-green: #b8b8b8;
    --accent-red: #ff6b6b;
    --gradient-main: linear-gradient(135deg, #ffffff 0%, #a0a0a0 100%);
    --gradient-week1: linear-gradient(135deg, #e0e0e0, #c0c0c0);
    --gradient-week2: linear-gradient(135deg, #d0d0d0, #b0b0b0);
    --gradient-week3: linear-gradient(135deg, #c8c8c8, #a8a8a8);
    --gradient-week4: linear-gradient(135deg, #b8b8b8, #989898);
    --gradient-bg: radial-gradient(ellipse at 20% 50%, rgba(255, 255, 255, 0.02) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 255, 255, 0.015) 0%, transparent 50%);
    --sidebar-width: 300px;
    --content-max-width: 1100px;
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.6);
    --shadow-glow-cyan: 0 0 30px rgba(255, 255, 255, 0.05);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --t-fast: 0.15s var(--ease-out);
    --t-normal: 0.3s var(--ease-out);
    --t-slow: 0.5s var(--ease-out);
    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 15px;
    min-height: 100vh;
    overflow-x: hidden
}

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--t-fast)
}

a:hover {
    color: #3bb8e0
}

img {
    max-width: 100%;
    display: block
}

::-webkit-scrollbar {
    width: 6px
}

::-webkit-scrollbar-track {
    background: transparent
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px
}

::selection {
    background: rgba(255, 255, 255, 0.2);
    color: #fff
}

h1,
h2,
h3,
h4 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em
}

h1 {
    font-size: 2.5rem
}

h2 {
    font-size: 1.75rem
}

h3 {
    font-size: 1.35rem
}

h4 {
    font-size: 1.1rem
}

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text
}

/* Layout */
.app-layout {
    display: flex;
    min-height: 100vh
}

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    background: var(--bg-sidebar);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    transition: transform var(--t-normal);
    overflow-y: auto
}

.sidebar-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary)
}

.sidebar-logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--gradient-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0
}

.sidebar-logo-text {
    font-size: .85rem;
    font-weight: 700;
    letter-spacing: .05em;
    text-transform: uppercase
}

.sidebar-logo-sub {
    font-size: .65rem;
    color: var(--text-muted);
    margin-top: 2px
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
    overflow-y: auto
}

.sidebar-section {
    margin-bottom: 4px
}

.sidebar-section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
    transition: color var(--t-fast)
}

.sidebar-section-title:hover {
    color: var(--text-secondary)
}

.week-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0
}

.week-dot.w1 {
    background: var(--gradient-week1)
}

.week-dot.w2 {
    background: var(--gradient-week2)
}

.week-dot.w3 {
    background: var(--gradient-week3)
}

.week-dot.w4 {
    background: var(--gradient-week4)
}

.sidebar-section-title .chevron {
    margin-left: auto;
    font-size: .6rem;
    transition: transform var(--t-fast);
    opacity: .5
}

.sidebar-section.open .chevron {
    transform: rotate(90deg)
}

.sidebar-links {
    list-style: none;
    overflow: hidden;
    max-height: 0;
    transition: max-height .4s var(--ease-out)
}

.sidebar-section.open .sidebar-links {
    max-height: 500px
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px 8px 38px;
    font-size: .82rem;
    color: var(--text-secondary);
    transition: all var(--t-fast);
    position: relative;
    cursor: pointer;
    text-decoration: none
}

.sidebar-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: transparent;
    border-radius: 0 3px 3px 0;
    transition: background var(--t-fast)
}

.sidebar-link:hover {
    color: var(--text-primary);
    background: var(--bg-glass)
}

.sidebar-link.active {
    color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.04)
}

.sidebar-link.active::before {
    background: var(--accent-cyan)
}

.link-status {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .6rem;
    flex-shrink: 0;
    transition: all var(--t-fast)
}

.link-status.completed {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: #fff
}

.sidebar-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 8px 20px
}

.sidebar-ref-title {
    padding: 10px 20px;
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px
}

.sidebar-progress {
    padding: 16px 20px;
    border-top: 1px solid var(--border-subtle);
    flex-shrink: 0
}

.progress-label {
    display: flex;
    justify-content: space-between;
    font-size: .72rem;
    color: var(--text-muted);
    margin-bottom: 8px
}

.progress-bar {
    height: 4px;
    background: var(--bg-glass);
    border-radius: 2px;
    overflow: hidden
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-main);
    border-radius: 2px;
    transition: width .6s var(--ease-out);
    width: 0%
}

/* Main */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    position: relative
}

.main-content::before {
    content: '';
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    bottom: 0;
    background: var(--gradient-bg);
    pointer-events: none;
    z-index: 0
}

.content-wrapper {
    position: relative;
    z-index: 1;
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 40px 40px 80px
}

.mobile-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 200;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: all var(--t-fast)
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 90
}

/* Landing */
.landing-page .main-content {
    margin-left: 0
}

.landing-page .main-content::before {
    left: 0
}

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 24px 60px;
    position: relative;
    overflow: hidden
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.12) 0%, rgba(255, 255, 255, 0.03) 40%, transparent 70%);
    border-radius: 50%;
    animation: heroGlow 6s ease-in-out infinite alternate;
    pointer-events: none
}

@keyframes heroGlow {
    0% {
        transform: translateX(-50%) scale(1);
        opacity: .8
    }

    100% {
        transform: translateX(-50%) scale(1.1);
        opacity: 1
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    font-size: .8rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
    animation: fadeInUp .6s var(--ease-out) both
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulseDot 2s infinite
}

@keyframes pulseDot {

    0%,
    100% {
        opacity: 1
    }

    50% {
        opacity: .4
    }
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp .6s var(--ease-out) .1s both
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.8;
    animation: fadeInUp .6s var(--ease-out) .2s both
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    animation: fadeInUp .6s var(--ease-out) .3s both
}

.hero-image {
    margin-top: 60px;
    max-width: 800px;
    width: 100%;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-lg), var(--shadow-glow-cyan);
    animation: fadeInUp .8s var(--ease-out) .4s both
}

.hero-image img {
    width: 100%
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-full);
    font-family: var(--font-sans);
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--t-normal);
    text-decoration: none;
    white-space: nowrap
}

.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.15)
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.2);
    color: #fff
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(10px)
}

.btn-secondary:hover {
    background: var(--bg-glass-hover);
    transform: translateY(-2px);
    color: var(--text-primary)
}

.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 60px;
    animation: fadeInUp .6s var(--ease-out) .5s both
}

.hero-stat {
    text-align: center
}

.hero-stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text
}

.hero-stat-label {
    font-size: .8rem;
    color: var(--text-muted);
    margin-top: 4px
}

/* Sections */
.landing-section {
    padding: 100px 24px;
    position: relative
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    font-size: .75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--accent-cyan);
    margin-bottom: 16px
}

.section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 16px
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.05rem
}

.weeks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto
}

.week-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px;
    position: relative;
    overflow: hidden;
    transition: all var(--t-normal);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-primary)
}

.week-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px
}

.week-card.w1::before {
    background: var(--gradient-week1)
}

.week-card.w2::before {
    background: var(--gradient-week2)
}

.week-card.w3::before {
    background: var(--gradient-week3)
}

.week-card.w4::before {
    background: var(--gradient-week4)
}

.week-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glass);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md)
}

.week-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 20px
}

.w1 .week-card-icon {
    background: rgba(255, 255, 255, 0.08)
}

.w2 .week-card-icon {
    background: rgba(255, 255, 255, 0.06)
}

.w3 .week-card-icon {
    background: rgba(245, 158, 11, 0.1)
}

.w4 .week-card-icon {
    background: rgba(255, 255, 255, 0.06)
}

.week-card h3 {
    font-size: 1.15rem;
    margin-bottom: 8px
}

.week-card-sub {
    color: var(--text-muted);
    font-size: .85rem;
    margin-bottom: 20px
}

.week-card-lessons {
    list-style: none
}

.week-card-lessons li {
    padding: 6px 0;
    font-size: .85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px
}

.week-card-lessons li::before {
    content: '→';
    color: var(--text-muted);
    font-size: .7rem
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--t-normal)
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glass);
    transform: translateY(-2px)
}

.feature-icon {
    font-size: 1.8rem;
    margin-bottom: 16px
}

.feature-card h4 {
    margin-bottom: 8px
}

.feature-card p {
    color: var(--text-secondary);
    font-size: .85rem;
    line-height: 1.6
}

.landing-footer {
    text-align: center;
    padding: 40px 24px;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-muted);
    font-size: .8rem
}

/* Lesson */
.lesson-header {
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-subtle)
}

.lesson-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px
}

.lesson-week-badge {
    padding: 4px 14px;
    border-radius: var(--radius-full);
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: #fff
}

.lesson-week-badge.w1 {
    background: var(--gradient-week1)
}

.lesson-week-badge.w2 {
    background: var(--gradient-week2)
}

.lesson-week-badge.w3 {
    background: var(--gradient-week3)
}

.lesson-week-badge.w4 {
    background: var(--gradient-week4)
}

.lesson-number {
    font-size: .8rem;
    color: var(--text-muted)
}

.lesson-header h1 {
    font-size: 2rem;
    margin-bottom: 12px
}

.lesson-objective {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: .9rem
}

.obj-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
    margin-top: 2px
}

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px
}

.lesson-step {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 0;
    overflow: hidden;
    transition: all var(--t-normal);
    position: relative;
    display: flex;
    flex-direction: column
}

.lesson-step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: rgba(255, 255, 255, 0.15);
    transition: background var(--t-fast)
}

.lesson-step:hover {
    border-color: var(--border-glass);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md), 0 0 20px rgba(255, 255, 255, 0.04)
}

.lesson-step:hover::before {
    background: rgba(255, 255, 255, 0.4)
}

.step-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 20px 0;
    margin-bottom: 0
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .8rem;
    font-weight: 700;
    color: #0a0a0a;
    flex-shrink: 0;
    box-shadow: 0 2px 10px rgba(255, 255, 255, 0.08)
}

.step-header h3 {
    font-size: .95rem;
    line-height: 1.3
}

.step-content {
    padding: 12px 20px 16px;
    flex: 1;
    display: flex;
    flex-direction: column
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.7;
    font-size: .88rem
}

.step-content ul,
.step-content ol {
    color: var(--text-secondary);
    padding-left: 18px;
    margin-bottom: 12px;
    font-size: .85rem
}

.step-content li {
    margin-bottom: 4px;
    line-height: 1.6
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-glass);
    background: var(--bg-secondary);
    margin-top: auto;
    margin-bottom: 0
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none
}

.video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: .78rem
}

.video-placeholder .play-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-glass);
    border: 2px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--t-normal)
}

.lesson-step:hover .play-icon {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.1)
}

.video-note {
    font-size: .75rem;
    color: var(--text-muted);
    padding: 6px 20px 14px;
    font-style: italic
}

/* Full-width step (spans 2 columns) */
.lesson-step.full-width {
    grid-column: 1 / -1
}


.lesson-exercise {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-top: 48px
}

.lesson-exercise h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    font-size: 1.1rem
}

.lesson-exercise p,
.lesson-exercise ul {
    color: var(--text-secondary);
    line-height: 1.8
}

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

.checklist li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-subtle);
    font-size: .9rem;
    color: var(--text-secondary)
}

.checklist li:last-child {
    border-bottom: none
}

.checklist input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-glass);
    border-radius: var(--radius-xs);
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: all var(--t-fast)
}

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

.checklist input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: .7rem;
    font-weight: 700
}

.lesson-nav {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 60px;
    padding-top: 32px;
    border-top: 1px solid var(--border-subtle)
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--t-normal);
    flex: 1;
    max-width: 280px
}

.nav-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glass);
    transform: translateY(-2px);
    color: var(--text-primary)
}

.nav-btn.next {
    margin-left: auto;
    text-align: right;
    flex-direction: row-reverse
}

.nav-btn-label {
    font-size: .72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .06em
}

.nav-btn-title {
    font-size: .9rem;
    font-weight: 600;
    margin-top: 2px
}

.nav-btn-arrow {
    font-size: 1.2rem;
    color: var(--text-muted);
    flex-shrink: 0
}

/* Reference Tables */
.ref-table-wrapper {
    overflow-x: auto;
    margin-bottom: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle)
}

.ref-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .88rem
}

.ref-table thead {
    background: var(--bg-glass)
}

.ref-table th {
    text-align: left;
    padding: 14px 18px;
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-subtle);
    white-space: nowrap
}

.ref-table td {
    padding: 12px 18px;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary)
}

.ref-table tbody tr {
    transition: background var(--t-fast)
}

.ref-table tbody tr:hover {
    background: var(--bg-glass)
}

.ref-table tbody tr:last-child td {
    border-bottom: none
}

.ref-table code {
    font-family: var(--font-mono);
    font-size: .82rem;
    padding: 2px 8px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xs);
    color: var(--accent-cyan)
}

.ref-section-title {
    font-size: 1.3rem;
    margin: 40px 0 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 10px
}

.ref-search {
    margin-bottom: 24px
}

.ref-search input {
    width: 100%;
    padding: 12px 20px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: .9rem;
    outline: none;
    transition: all var(--t-fast)
}

.ref-search input::placeholder {
    color: var(--text-muted)
}

.ref-search input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08)
}

.info-box {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: .88rem;
    line-height: 1.7
}

.info-box.tip {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #d0d0d0
}

.info-box.warning {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #e0e0e0
}

.info-box.danger {
    background: rgba(255, 100, 100, 0.06);
    border: 1px solid rgba(255, 100, 100, 0.12);
    color: #ff9999
}

.info-box.info {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--accent-cyan)
}

.code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 20px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: .82rem;
    color: var(--text-secondary);
    line-height: 1.7
}

.complete-lesson-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: .95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--t-normal);
    margin-top: 32px
}

.complete-lesson-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--accent-green)
}

.complete-lesson-btn.completed {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-green);
    color: var(--accent-green)
}

/* Sidebar User */
.sidebar-user {
    padding: 16px 20px;
    border-top: 1px solid var(--border-subtle);
    flex-shrink: 0
}

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

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .8rem;
    font-weight: 700;
    color: #0a0a0a;
    flex-shrink: 0
}

.user-details {
    overflow: hidden
}

.user-name {
    font-size: .82rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis
}

.user-role {
    font-size: .68rem;
    color: var(--text-muted)
}

.logout-btn {
    width: 100%;
    padding: 8px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: .78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--t-fast)
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.25);
    color: var(--text-primary)
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px)
    }

    to {
        opacity: 1;
        transform: translateY(0)
    }
}

@keyframes fadeIn {
    from {
        opacity: 0
    }

    to {
        opacity: 1
    }
}

.animate-in {
    animation: fadeInUp .5s var(--ease-out) both
}

@media(max-width:768px) {
    .mobile-toggle {
        display: flex
    }

    .sidebar {
        transform: translateX(-100%);
        width: 300px
    }

    .sidebar.open {
        transform: translateX(0)
    }

    .sidebar-overlay.active {
        display: block;
        opacity: 1
    }

    .main-content {
        margin-left: 0
    }

    .main-content::before {
        left: 0
    }

    .content-wrapper {
        padding: 80px 16px 40px
    }

    h1 {
        font-size: 1.8rem
    }

    h2 {
        font-size: 1.4rem
    }

    .lesson-nav {
        flex-direction: column
    }

    .nav-btn {
        max-width: 100%
    }

    .hero-stats {
        gap: 24px;
        flex-wrap: wrap
    }

    .step-content {
        padding: 10px 16px 14px
    }

    .steps-grid,
    .weeks-grid,
    .features-grid {
        grid-template-columns: 1fr
    }
}