@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');

.sb-course-page {
    --sb-bg: #07110d;
    --sb-surface: rgba(255, 255, 255, 0.04);
    --sb-surface-strong: rgba(255, 255, 255, 0.07);
    --sb-border: rgba(255, 255, 255, 0.1);
    --sb-text: #f6fbf8;
    --sb-muted: #95ae9f;
    --sb-accent: #00e68a;
    --sb-accent-soft: rgba(0, 230, 138, 0.14);
    --sb-accent-strong: rgba(0, 230, 138, 0.22);
    --sb-glow: rgba(0, 230, 138, 0.24);
}

.sb-course-page .container {
    max-width: 1320px;
}

.sb-course-page h1,
.sb-course-page h2,
.sb-course-page h3,
.sb-course-page strong,
.sb-course-page .sb-course-lesson-title,
.sb-course-page .sb-course-btn,
.sb-course-page .sb-course-secondary-btn,
.sb-course-page .sb-course-floating-btn,
.sb-course-page .sb-course-lesson-index {
    font-family: 'Space Grotesk', sans-serif;
}


.skip-link {
    position: absolute;
    left: -999px;
    top: auto;
}

.skip-link:focus {
    left: 12px;
    top: 12px;
    z-index: 1000;
    background: #06110b;
    color: #fff;
    padding: 8px 10px;
    border-radius: 8px;
}

.sb-course-shell {
    display: grid;
    gap: 18px;
    padding-top: 18px;
}

.sb-course-progress-bar,
.sb-course-sidebar,
.sb-course-hero,
.sb-course-card,
.sb-course-finish {
    border: 1px solid var(--sb-border);
    background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.025));
    border-radius: 24px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
}

.sb-course-progress-bar {
    padding: 20px 22px;
}

.sb-course-progress-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 18px;
    margin-bottom: 14px;
}

.sb-course-progress-head h1 {
    margin: 4px 0 0;
    font-size: clamp(2rem, 4vw, 3.3rem);
    letter-spacing: -0.04em;
}

.sb-course-eyebrow {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    font-size: 0.72rem;
    color: var(--sb-muted);
}

.sb-course-progress-copy {
    text-align: right;
    display: grid;
    gap: 4px;
}

.sb-course-progress-copy strong {
    font-size: clamp(1.5rem, 3vw, 2.3rem);
    line-height: 1;
}

.sb-course-progress-copy span {
    color: var(--sb-muted);
    font-size: 0.92rem;
}

.sb-course-track {
    position: relative;
    height: 14px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.03);
}

.sb-course-fill {
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--sb-accent), #7affc0);
    box-shadow: 0 0 28px var(--sb-glow);
    transition: width 0.35s ease;
}

.sb-course-segments {
    display: grid;
    grid-template-columns: repeat(10, minmax(0, 1fr));
    gap: 6px;
    margin-top: 10px;
}

.sb-course-segment {
    height: 8px;
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.03);
}

.sb-course-segment.is-complete {
    background: linear-gradient(90deg, var(--sb-accent), #7affc0);
    box-shadow: 0 0 18px var(--sb-glow);
}

.sb-course-segment.is-current {
    background: rgba(122, 255, 192, 0.35);
    animation: sbPulse 1.4s ease-in-out infinite;
}

.sb-course-layout {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}

.sb-course-sidebar {
    position: sticky;
    top: 18px;
    padding: 18px 0;
    border-radius: 0;
    border: 0;
    border-right: 1px solid rgba(255,255,255,0.08);
    background: transparent;
    box-shadow: none;
}

.sb-course-sidebar-head {
    margin-bottom: 12px;
    padding: 0 18px 0 0;
}

.sb-course-sidebar-toggle {
    display: none;
}

.sb-course-lesson-list-wrap {
    display: block;
}

.sb-course-lesson-list {
    display: grid;
    gap: 1px;
}

.sb-course-lesson-btn {
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    color: var(--sb-text);
    border-radius: 0 12px 12px 0;
    padding: 10px 18px 10px 14px;
    text-align: left;
    cursor: pointer;
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, opacity 0.18s ease, color 0.18s ease;
}

.sb-course-lesson-btn:hover {
    transform: translateX(2px);
    border-color: rgba(0, 230, 138, 0.18);
    background: rgba(255, 255, 255, 0.03);
}

.sb-course-lesson-btn.is-active {
    border-color: rgba(0, 230, 138, 0.88);
    background: linear-gradient(90deg, rgba(0, 230, 138, 0.12), rgba(255,255,255,0.015));
    box-shadow: inset 0 0 0 1px rgba(0, 230, 138, 0.08);
}

.sb-course-lesson-btn.is-next {
    border-color: rgba(122, 255, 192, 0.22);
}

.sb-course-lesson-btn.is-complete {
    opacity: 0.72;
}

.sb-course-lesson-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.sb-course-lesson-copy {
    min-width: 0;
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
}

.sb-course-lesson-index {
    color: #cfe0d6;
    font-size: 0.86rem;
    font-weight: 700;
    flex: 0 0 auto;
}

.sb-course-lesson-status {
    min-width: 14px;
    color: var(--sb-accent);
    font-size: 0.9rem;
    font-weight: 800;
    text-align: right;
    flex: 0 0 auto;
}

.sb-course-lesson-title {
    margin: 0;
    font-size: 0.94rem;
    line-height: 1.32;
    color: #e8f3ed;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sb-course-stage {
    display: grid;
    gap: 32px;
    align-content: start;
}

.sb-course-hero {
    overflow: hidden;
    transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.sb-course-hero.is-transitioning {
    border-color: rgba(0, 230, 138, 0.3);
}

.sb-course-hero.is-celebrating {
    animation: sbCardCelebrate 0.82s ease;
}

.sb-course-video-wrap {
    position: relative;
    aspect-ratio: 16 / 9;
    background: radial-gradient(circle at top, rgba(0, 230, 138, 0.16), rgba(0, 0, 0, 0.72));
    border-bottom: 1px solid var(--sb-border);
}

.sb-course-video-wrap iframe,
.sb-course-video-placeholder {
    width: 100%;
    height: 100%;
    border: 0;
}

.sb-course-video-placeholder {
    display: grid;
    place-items: center;
    padding: 24px;
    text-align: center;
}

.sb-course-video-placeholder-inner {
    max-width: 420px;
}

.sb-course-video-placeholder strong {
    display: block;
    font-size: clamp(1.4rem, 3vw, 2rem);
    margin-bottom: 8px;
}

.sb-course-video-placeholder p {
    margin: 0;
    color: #c4d7cc;
    line-height: 1.55;
}

.sb-course-hero-body {
    display: grid;
    gap: 18px;
    padding: 24px 20px 22px;
    margin-bottom: 32px;
}

.sb-course-hero-body--stacked {
    gap: 16px;
}

.sb-course-title {
    margin: 0;
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    line-height: 1.06;
    letter-spacing: -0.04em;
}


.sb-course-card {
    padding: 28px 22px;
    margin-top: 32px;
    margin-bottom: 32px;
}

.sb-course-card h2,
.sb-course-card h3 {
    margin: 0 0 12px;
    font-size: 1.05rem;
}

.sb-course-card-notes h3,
.sb-course-card-task h3 {
    font-size: 0.84rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--sb-muted);
    margin-bottom: 16px;
}

.sb-course-card-task {
    border-color: rgba(0, 230, 138, 0.18);
    background: linear-gradient(180deg, rgba(0, 230, 138, 0.08), rgba(255,255,255,0.025));
}

.sb-course-notes {
    margin: 0;
    padding-left: 18px;
    color: var(--sb-text);
    display: grid;
    gap: 10px;
    line-height: 1.55;
}

.sb-course-task {
    margin: 0;
    color: var(--sb-text);
    line-height: 1.65;
}

.sb-course-action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 0;
}

.sb-course-action-row-bottom {
    margin-top: 40px;
    padding-top: 12px;
}

.sb-course-btn,
.sb-course-secondary-btn,
.sb-course-floating-btn {
    appearance: none;
    border: 0;
    cursor: pointer;
    border-radius: 999px;
    padding: 14px 20px;
    font: 700 0.92rem/1.1 'Inter', sans-serif;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, opacity 0.18s ease;
}

.sb-course-btn.is-loading {
    opacity: 0.7;
    pointer-events: none;
}

.sb-course-btn,
.sb-course-floating-btn {
    background: linear-gradient(180deg, var(--sb-accent), #7affc0);
    color: #03100a;
    box-shadow: 0 12px 30px rgba(0, 230, 138, 0.18);
}

.sb-course-btn:hover,
.sb-course-secondary-btn:hover,
.sb-course-floating-btn:hover {
    transform: translateY(-1px);
}

.sb-course-btn:disabled,
.sb-course-secondary-btn:disabled,
.sb-course-floating-btn:disabled {
    opacity: 0.6;
    cursor: default;
}

.sb-course-secondary-btn {
    background: rgba(255,255,255,0.04);
    color: var(--sb-text);
    border: 1px solid rgba(255,255,255,0.08);
}

.sb-course-finish {
    padding: 28px;
    text-align: center;
    background: radial-gradient(circle at top, rgba(0, 230, 138, 0.22), rgba(255,255,255,0.03));
    box-shadow: 0 24px 100px rgba(0, 0, 0, 0.28), 0 0 0 1px rgba(0, 230, 138, 0.14);
}

.sb-course-finish-mark {
    display: inline-flex;
    width: 92px;
    height: 92px;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    font-size: 2.8rem;
    margin-bottom: 18px;
    box-shadow: 0 0 0 12px rgba(0, 230, 138, 0.08), 0 0 40px rgba(0, 230, 138, 0.18);
}

.sb-course-finish h2 {
    margin: 0;
    font-size: clamp(2.2rem, 5vw, 4.4rem);
    line-height: 0.98;
    letter-spacing: -0.05em;
}

.sb-course-finish p {
    max-width: 56ch;
    margin: 14px auto 0;
    color: var(--sb-muted);
    line-height: 1.7;
}

.sb-course-finish-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 24px;
}

.sb-course-finish-stat {
    padding: 16px;
    border-radius: 18px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.04);
}

.sb-course-finish-stat strong {
    display: block;
    font-size: 1.4rem;
    margin-bottom: 4px;
}

.sb-course-finish-stat span {
    color: #c4d7cc;
    font-size: 0.9rem;
}

.sb-course-confetti {
    pointer-events: none;
    position: fixed;
    inset: 0;
    overflow: hidden;
    z-index: 100;
}

.sb-course-confetti-piece {
    position: absolute;
    top: -24px;
    width: 10px;
    height: 18px;
    border-radius: 999px;
    opacity: 0;
    animation: sbConfettiFall var(--dur, 1.4s) ease-out forwards;
}

.sb-course-toast-stack {
    position: fixed;
    left: 50%;
    bottom: 28px;
    transform: translateX(-50%);
    width: min(560px, calc(100vw - 24px));
    display: grid;
    gap: 10px;
    z-index: 140;
    pointer-events: none;
}

.sb-course-toast {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border-radius: 20px;
    border: 1px solid rgba(0, 230, 138, 0.22);
    background: linear-gradient(180deg, rgba(6, 17, 11, 0.96), rgba(8, 21, 14, 0.94));
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(0, 230, 138, 0.08);
    transform: translateY(22px) scale(0.96);
    opacity: 0;
    transition: transform 0.22s ease, opacity 0.22s ease;
    pointer-events: auto;
}

.sb-course-toast.is-visible {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.sb-course-toast.is-leaving {
    transform: translateY(12px) scale(0.98);
    opacity: 0;
}

.sb-course-toast-emoji {
    font-size: 1.6rem;
    line-height: 1;
}

.sb-course-toast-copy {
    color: #f0fbf6;
    line-height: 1.45;
    font-weight: 600;
}

.sb-course-toast-close {
    appearance: none;
    border: 0;
    background: rgba(255,255,255,0.06);
    color: #e9f8f0;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 1.2rem;
}

.sb-course-floating-cta {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: 12px;
    z-index: 130;
    pointer-events: none;
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.22s ease, transform 0.22s ease;
}

.sb-course-floating-cta.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.sb-course-floating-cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px;
    border-radius: 18px;
    border: 1px solid rgba(0, 230, 138, 0.2);
    background: rgba(6, 17, 11, 0.94);
    backdrop-filter: blur(12px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
}

.sb-course-floating-copy {
    display: grid;
    gap: 4px;
}

.sb-course-floating-copy strong {
    font-size: 0.95rem;
}

.sb-course-floating-copy span {
    color: #c3d8cc;
    font-size: 0.86rem;
    line-height: 1.35;
}

@keyframes sbConfettiFall {
    0% {
        transform: translate3d(0, 0, 0) rotate(0deg) scale(0.8);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    100% {
        transform: translate3d(var(--tx), 110vh, 0) rotate(var(--rot)) scale(1);
        opacity: 0;
    }
}

@keyframes sbPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(0, 230, 138, 0.16), 0 0 14px rgba(0, 230, 138, 0.18);
    }
    50% {
        transform: scale(1.04);
        box-shadow: 0 0 0 6px rgba(0, 230, 138, 0.04), 0 0 20px rgba(0, 230, 138, 0.28);
    }
}

@keyframes sbCardCelebrate {
    0% {
        transform: scale(1);
        box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
    }
    20% {
        transform: scale(1.01);
        box-shadow: 0 24px 90px rgba(0, 0, 0, 0.26), 0 0 0 1px rgba(0, 230, 138, 0.18), 0 0 44px rgba(0, 230, 138, 0.18);
    }
    55% {
        transform: scale(0.998);
        background: linear-gradient(180deg, rgba(0, 230, 138, 0.08), rgba(255,255,255,0.025));
    }
    100% {
        transform: scale(1);
    }
}

@media (max-width: 1024px) {
    .sb-course-layout {
        grid-template-columns: 1fr;
    }

    .sb-course-sidebar {
        position: static;
        padding: 16px;
        border-right: 0;
        border: 1px solid var(--sb-border);
        border-radius: 24px;
        background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.025));
        box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
    }

    .sb-course-sidebar-head {
        padding-right: 0;
    }

    .sb-course-lesson-list {
        grid-template-columns: 1fr;
    }

    .sb-course-hero-body {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .sb-course-sidebar-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        margin-bottom: 0;
    }

    .sb-course-sidebar-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        width: 100%;
        padding: 12px 14px;
        border-radius: 16px;
        border: 1px solid rgba(255,255,255,0.08);
        background: rgba(255,255,255,0.04);
        color: var(--sb-text);
        font: 600 0.92rem/1 'Space Grotesk', sans-serif;
    }

    .sb-course-sidebar-toggle .sb-course-sidebar-chevron {
        transition: transform 0.18s ease;
    }

    .sb-course-sidebar.is-mobile-expanded .sb-course-sidebar-chevron {
        transform: rotate(180deg);
    }

    .sb-course-sidebar .sb-course-eyebrow {
        display: none;
    }

    .sb-course-lesson-list-wrap {
        display: none;
        margin-top: 12px;
    }

    .sb-course-sidebar.is-mobile-expanded .sb-course-lesson-list-wrap {
        display: block;
    }
}

@media (max-width: 900px) {
    .sb-course-floating-cta[hidden] {
        display: none;
    }
}

@media (min-width: 901px) {
    .sb-course-floating-cta {
        display: none;
    }
}

@media (max-width: 720px) {
    .sb-course-stage {
        gap: 24px;
    }

    .sb-course-progress-head {
        align-items: start;
        flex-direction: column;
    }

    .sb-course-progress-copy {
        text-align: left;
    }

    .sb-course-lesson-list {
        grid-template-columns: 1fr;
    }

    .sb-course-hero-body,
    .sb-course-progress-bar,
    .sb-course-card,
    .sb-course-finish {
        padding-left: 16px;
        padding-right: 16px;
    }

    .sb-course-action-row,
    .sb-course-floating-cta-inner {
        flex-direction: column;
        align-items: stretch;
    }

    .sb-course-btn,
    .sb-course-secondary-btn,
    .sb-course-floating-btn {
        width: 100%;
    }

    .sb-course-toast-stack {
        bottom: 84px;
    }

    .sb-course-finish-grid {
        grid-template-columns: 1fr;
    }
}