/* Learn — /learn/ hub and /learn/<course>/ pages. Bhojpatra (birch-bark) paper and ink; Trust tokens, light + dark. */
.sb-ln {
    --ln-paper: #fbf3e2;
    --ln-paper-2: #f3e3c3;
    --ln-card: #fffaf0;
    --ln-ink: #3a2616;
    --ln-head: var(--sb-maroon);
    --ln-muted: #6b5644;
    --ln-line: #e2d0a9;
    --ln-accent: var(--sb-saffron);
    --ln-error: #b3261e;
    overflow-x: clip;
    color: var(--ln-ink);
    background: var(--ln-paper);
}

[data-theme="dark"] .sb-ln {
    --ln-paper: #1d150b;
    --ln-paper-2: #271c10;
    --ln-card: #251b10;
    --ln-ink: #efe4d2;
    --ln-head: #f0c75e;
    --ln-muted: #c9bba6;
    --ln-line: #4a3b29;
    --ln-error: #ff8a80;
}

.sb-ln *,
.sb-ln *::before,
.sb-ln *::after {
    box-sizing: border-box;
}

.sb-ln p {
    line-height: 1.75;
}

.sb-ln-center {
    text-align: center;
}

.sb-ln .sb-section-title {
    color: var(--ln-head);
}

.sb-ln .sb-section-desc {
    color: var(--ln-muted);
}

.sb-ln .sb-section-header {
    margin-bottom: var(--sb-space-2xl);
}

.sb-ln-alt {
    background: var(--ln-paper-2);
    border-block: 1px solid var(--ln-line);
}

.sb-ln-h2 {
    font-size: var(--sb-text-3xl);
    color: var(--ln-head);
    margin: 0 0 var(--sb-space-md);
    line-height: 1.3;
}

.sb-ln-h3 {
    font-size: var(--sb-text-2xl);
    color: var(--ln-head);
    margin: 0 0 var(--sb-space-sm);
}

.sb-ln-h3 a {
    color: inherit;
    text-decoration: none;
}

.sb-ln-hi {
    margin: 0;
    font-family: var(--sb-font-heading);
    color: var(--ln-muted);
}

.sb-ln-kicker {
    display: inline-block;
    font-size: var(--sb-text-xs);
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ln-accent);
}

.sb-ln-small {
    font-size: var(--sb-text-sm);
    color: var(--ln-muted);
}

.sb-ln-more {
    font-weight: 700;
    color: var(--ln-head);
    text-decoration: none;
}

.sb-ln-more:hover {
    text-decoration: underline;
}

.sb-ln .sb-btn {
    white-space: normal;
    text-align: center;
    line-height: 1.25;
    min-height: 48px;
}

.sb-ln-btn-lg {
    min-height: 54px !important;
    padding: .95rem 1.8rem;
}

.sb-ln a:focus-visible,
.sb-ln .sb-btn:focus-visible,
.sb-ln summary:focus-visible,
.sb-ln input:focus-visible,
.sb-ln select:focus-visible,
.sb-ln textarea:focus-visible {
    outline: 3px solid var(--sb-gold);
    outline-offset: 2px;
}

/* Paper: the sketch and form sit on a bhojpatra-coloured sheet in both themes. */
.sb-ln-paper {
    position: relative;
    color: #3a2616;
    background:
        repeating-linear-gradient(176deg, transparent 0 22px, rgba(139, 106, 69, .07) 22px 23px),
        radial-gradient(ellipse at 20% 10%, rgba(255, 255, 255, .7), transparent 60%),
        #f8ecd2;
    border: 1px solid #dcc394;
    border-radius: 6px 18px 8px 16px / 14px 8px 18px 6px;
    box-shadow: 0 1px 0 #fff inset, 0 18px 40px -22px rgba(92, 16, 16, .45);
}

[data-theme="dark"] .sb-ln-paper {
    box-shadow: 0 18px 40px -18px rgba(0, 0, 0, .8);
}

/* ---------- Hero ---------- */
.sb-ln-hero {
    padding: calc(var(--sb-header-height) + var(--sb-space-2xl)) 0 0;
    background:
        radial-gradient(ellipse at 85% 0%, rgba(255, 107, 0, .12), transparent 55%),
        linear-gradient(180deg, var(--ln-paper-2), var(--ln-paper));
    border-bottom: 1px solid var(--ln-line);
}

.sb-ln-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sb-space-2xl);
    align-items: center;
    padding-bottom: var(--sb-space-2xl);
}

@media (min-width: 900px) {
    .sb-ln-hero-grid {
        grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
        gap: var(--sb-space-3xl);
    }
}

.sb-ln-crumb {
    justify-content: flex-start;
}

.sb-ln-crumb a,
.sb-ln-crumb span {
    color: var(--ln-muted);
}

.sb-ln-hero-mark {
    display: block;
    margin-bottom: var(--sb-space-md);
}

.sb-ln-title {
    margin: var(--sb-space-sm) 0 var(--sb-space-xs);
    font-size: var(--sb-text-5xl);
    line-height: 1.12;
    color: var(--ln-head);
}

.sb-ln-sub {
    margin: 0 0 var(--sb-space-md);
    font-family: var(--sb-font-heading);
    font-size: var(--sb-text-xl);
    color: var(--ln-muted);
}

.sb-ln-lead {
    max-width: 36em;
    font-size: var(--sb-text-lg);
}

.sb-ln-facts,
.sb-ln-tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: var(--sb-space-md) 0;
    padding: 0;
}

.sb-ln-facts li,
.sb-ln-tags li {
    padding: 6px 14px;
    border: 1px solid var(--ln-line);
    border-radius: var(--sb-radius-full);
    background: var(--ln-card);
    font-size: var(--sb-text-sm);
    font-weight: 600;
}

.sb-ln-facts li.is-rule,
.sb-ln-tags li.is-rule {
    border-color: var(--sb-maroon);
    color: var(--sb-white);
    background: var(--sb-maroon);
}

[data-theme="dark"] .sb-ln-facts li.is-rule,
[data-theme="dark"] .sb-ln-tags li.is-rule {
    color: #1d150b;
    background: var(--sb-gold-light);
    border-color: var(--sb-gold-light);
}

.sb-ln-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sb-space-md);
    margin-top: var(--sb-space-lg);
}

.sb-ln-hero-art {
    padding: clamp(10px, 2vw, 22px);
    transform: rotate(-.6deg);
}

.sb-ln-hero-art .sb-ln-sketch {
    display: block;
    width: 100%;
    height: auto;
}

.sb-ln-jump {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px var(--sb-space-lg);
    padding: 14px var(--sb-space-md);
    border-top: 1px solid var(--ln-line);
    background: var(--ln-card);
}

.sb-ln-jump a {
    padding: 6px 2px;
    font-weight: 700;
    font-size: var(--sb-text-sm);
    color: var(--ln-head);
    text-decoration: none;
}

/* ---------- Eligibility (Sandhya) ---------- */
.sb-ln-rule-sec {
    padding: var(--sb-space-xl) 0 0;
}

.sb-ln-rule {
    padding: var(--sb-space-lg) var(--sb-space-xl);
    border-left: 6px solid var(--sb-maroon);
    border-radius: var(--sb-radius-lg);
    background: var(--ln-card);
    box-shadow: 0 10px 26px -18px rgba(92, 16, 16, .6);
}

.sb-ln-rule strong {
    display: block;
    color: var(--ln-head);
    font-family: var(--sb-font-heading);
    font-size: var(--sb-text-xl);
}

.sb-ln-rule p {
    margin: 4px 0 0;
}

.sb-ln-rule-inline {
    padding: 10px 14px;
    border-left: 4px solid var(--sb-maroon);
    background: var(--ln-card);
    border-radius: 6px;
    font-weight: 600;
}

/* ---------- Course cards ---------- */
.sb-ln-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
    gap: var(--sb-space-xl);
}

.sb-ln-grid--two {
    max-width: 880px;
    margin: 0 auto;
}

.sb-ln-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--ln-card);
    border: 1px solid var(--ln-line);
    border-radius: var(--sb-radius-xl);
    box-shadow: 0 16px 36px -26px rgba(92, 16, 16, .55);
}

.sb-ln-card-art {
    display: block;
    padding: 12px;
    background: #f8ecd2;
    border-bottom: 1px solid #dcc394;
}

.sb-ln-card-art .sb-ln-sketch {
    display: block;
    width: 100%;
    height: auto;
    transition: transform .5s ease;
}

.sb-ln-card:hover .sb-ln-card-art .sb-ln-sketch {
    transform: scale(1.03);
}

.sb-ln-card-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 6px;
    padding: var(--sb-space-lg);
}

.sb-ln-card-title {
    margin: 0;
    font-size: var(--sb-text-2xl);
    line-height: 1.3;
}

.sb-ln-card-title a {
    color: var(--ln-head);
    text-decoration: none;
}

.sb-ln-card-body > p:not(.sb-ln-hi) {
    margin: 6px 0 0;
    color: var(--ln-muted);
}

.sb-ln-card-act {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px var(--sb-space-lg);
    margin-top: auto;
    padding-top: var(--sb-space-md);
}

.sb-ln-card--sm .sb-ln-card-art {
    max-height: 210px;
    overflow: hidden;
}

/* ---------- What is taught: manuscript leaves ---------- */
.sb-ln-tracks {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
    gap: var(--sb-space-xl);
}

.sb-ln-tracks.is-three {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}

.sb-ln-leaf {
    position: relative;
    padding: var(--sb-space-xl) var(--sb-space-xl) var(--sb-space-lg);
    background:
        repeating-linear-gradient(178deg, transparent 0 30px, rgba(139, 106, 69, .08) 30px 31px),
        var(--ln-card);
    border: 1px solid var(--ln-line);
    border-radius: 10px 22px 12px 20px / 18px 10px 22px 10px;
    box-shadow: 0 16px 34px -26px rgba(92, 16, 16, .6);
}

.sb-ln-leaf::before {
    /* string hole of a pothi leaf */
    content: "";
    position: absolute;
    top: 22px;
    right: 22px;
    width: 12px;
    height: 12px;
    border: 2px solid var(--ln-line);
    border-radius: 50%;
}

.sb-ln-leaf header {
    margin-bottom: var(--sb-space-sm);
    padding-bottom: var(--sb-space-sm);
    border-bottom: 2px solid var(--ln-ink);
    border-image: linear-gradient(90deg, var(--ln-ink), transparent) 1;
}

.sb-ln-leaf h3 {
    margin: 0;
    padding-right: 26px; /* keep clear of the string hole */
    color: var(--ln-head);
    font-size: var(--sb-text-2xl);
}

.sb-ln-leaf-intro {
    color: var(--ln-muted);
}

.sb-ln-items {
    list-style: none;
    counter-reset: ln;
    display: grid;
    gap: var(--sb-space-md);
    margin: var(--sb-space-md) 0 0;
    padding: 0;
}

.sb-ln-items li {
    counter-increment: ln;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding-left: 44px;
}

.sb-ln-items li::before {
    content: counter(ln);
    position: absolute;
    left: 0;
    top: 0;
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border: 1.5px solid var(--ln-accent);
    border-radius: 50%;
    color: var(--ln-accent);
    font-weight: 700;
    font-size: var(--sb-text-sm);
}

.sb-ln-items strong {
    color: var(--ln-ink);
    font-size: var(--sb-text-lg);
}

.sb-ln-items span {
    color: var(--ln-muted);
    line-height: 1.65;
}

/* ---------- Steps ---------- */
.sb-ln-steps {
    list-style: none;
    display: grid;
    gap: var(--sb-space-md);
    margin: 0;
    padding: 0;
}

.sb-ln-steps li {
    display: flex;
    gap: var(--sb-space-md);
    align-items: flex-start;
    padding: var(--sb-space-lg);
    background: var(--ln-card);
    border: 1px solid var(--ln-line);
    border-radius: var(--sb-radius-xl);
}

.sb-ln-steps li > div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sb-ln-steps strong {
    color: var(--ln-head);
    font-family: var(--sb-font-heading);
    font-size: var(--sb-text-lg);
}

.sb-ln-steps span {
    color: var(--ln-muted);
    font-size: var(--sb-text-sm);
}

.sb-ln-step-n {
    flex: 0 0 auto;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--ln-accent);
    color: #fff !important;
    font-weight: 700;
    font-size: var(--sb-text-base) !important;
}

.sb-ln-note {
    margin: var(--sb-space-xl) 0 0;
    padding: var(--sb-space-lg);
    border: 1px dashed var(--ln-line);
    border-radius: var(--sb-radius-lg);
    text-align: center;
}

/* ---------- Enquiry form ---------- */
.sb-ln-form-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sb-space-2xl);
    align-items: start;
}

@media (min-width: 1000px) {
    .sb-ln-form-wrap {
        grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    }

    .sb-ln-form-head {
        position: sticky;
        top: calc(var(--sb-header-height) + 24px);
    }
}

.sb-ln-form-box {
    padding: clamp(18px, 3.5vw, 40px);
}

.sb-ln-form fieldset {
    margin: 0 0 var(--sb-space-xl);
    padding: 0;
    border: 0;
    min-width: 0;
}

.sb-ln-form legend {
    width: 100%;
    margin-bottom: var(--sb-space-md);
    padding-bottom: 6px;
    border-bottom: 1px solid #dcc394;
    font-family: var(--sb-font-heading);
    font-size: var(--sb-text-xl);
    font-weight: 700;
    color: #8b1a1a;
}

.sb-ln-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    gap: 0 var(--sb-space-lg);
}

.sb-ln-field {
    margin-bottom: var(--sb-space-md);
    min-width: 0;
}

.sb-ln-field > label,
.sb-ln-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 700;
    color: #3a2616;
}

.sb-ln-field small {
    font-weight: 400;
    color: #6b5644;
}

.sb-ln-req {
    color: #b3261e;
}

.sb-ln-form input[type="text"],
.sb-ln-form input[type="email"],
.sb-ln-form input[type="tel"],
.sb-ln-form input[type="date"],
.sb-ln-form select,
.sb-ln-form textarea {
    width: 100%;
    min-height: 48px;
    padding: 10px 14px;
    border: 1.5px solid #cdb68a;
    border-radius: 10px;
    background: #fffdf8;
    color: #2a1a0d;
    font: inherit;
    font-size: 16px;
}

.sb-ln-form textarea {
    resize: vertical;
}

.sb-ln-form input[type="file"] {
    width: 100%;
    padding: 10px;
    border: 1.5px dashed #b89a63;
    border-radius: 10px;
    background: #fffdf8;
    color: #2a1a0d;
    font-size: 15px;
}

.sb-ln-form [aria-invalid="true"] {
    border-color: #b3261e !important;
    background: #fff5f4 !important;
}

.sb-ln-choices {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.sb-ln-choices label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 44px;
    padding: 8px 14px;
    border: 1.5px solid #cdb68a;
    border-radius: var(--sb-radius-full);
    background: #fffdf8;
    color: #2a1a0d;
    cursor: pointer;
}

.sb-ln-choices label:has(input:checked) {
    border-color: #8b1a1a;
    background: #fbe9d9;
    font-weight: 700;
}

.sb-ln-choices input,
.sb-ln-check input {
    width: 20px;
    height: 20px;
    accent-color: #8b1a1a;
    flex: 0 0 auto;
}

.sb-ln-check {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    margin: 0 0 var(--sb-space-sm);
    color: #3a2616;
    cursor: pointer;
}

.sb-ln-check input {
    margin-top: 3px;
}

.sb-ln-check a {
    color: #8b1a1a;
}

.sb-ln-hint {
    margin: 6px 0 0;
    font-size: var(--sb-text-sm);
    line-height: 1.5 !important;
    color: #6b5644;
}

.sb-ln-hint.is-bad {
    color: #b3261e;
    font-weight: 700;
}

.sb-ln-hint.is-ok {
    color: #2e7d32;
    font-weight: 700;
}

.sb-ln-err {
    margin: 6px 0 0;
    font-size: var(--sb-text-sm);
    line-height: 1.5 !important;
    font-weight: 700;
    color: #b3261e;
}

.sb-ln-alert {
    margin-bottom: var(--sb-space-lg);
    padding: 12px 16px;
    border: 1.5px solid #b3261e;
    border-radius: 10px;
    background: #fff5f4;
    color: #8c1d18;
    font-weight: 700;
}

.sb-ln-guardian {
    padding: var(--sb-space-md);
    margin-bottom: var(--sb-space-md);
    border: 1px dashed #cdb68a;
    border-radius: 10px;
}

.sb-ln-guardian .sb-ln-hint {
    margin: 0 0 var(--sb-space-sm);
}

.sb-ln-photo {
    display: flex;
    gap: var(--sb-space-lg);
    align-items: flex-start;
}

.sb-ln-photo .sb-ln-field {
    flex: 1;
}

.sb-ln-photo-frame {
    flex: 0 0 auto;
    display: grid;
    place-items: center;
    width: 96px;
    height: 120px;
    overflow: hidden;
    border: 2px solid #cdb68a;
    border-radius: 8px;
    background:
        radial-gradient(circle at 50% 38%, #e4d1ab 0 20%, transparent 21%),
        radial-gradient(ellipse at 50% 100%, #e4d1ab 0 42%, transparent 43%),
        #fffdf8;
    color: #9e8e7e;
    font-size: 12px;
}

.sb-ln-photo-frame span {
    margin-top: 70px;
}

.sb-ln-photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sb-ln-hp {
    position: absolute !important;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.sb-ln-send {
    margin-top: var(--sb-space-lg);
    min-height: 56px !important;
    font-size: var(--sb-text-lg);
}

.sb-ln-send[disabled] {
    opacity: .7;
    cursor: wait;
}

.sb-ln-form-box .sb-ln-small {
    color: #6b5644;
}

.sb-ln-done {
    padding: var(--sb-space-xl) 0;
    text-align: center;
    color: #3a2616;
}

.sb-ln-done h3 {
    margin: var(--sb-space-md) 0;
    color: #8b1a1a;
    font-size: var(--sb-text-2xl);
}

.sb-ln-done .sb-ln-more {
    color: #8b1a1a;
}

.sb-ln-done:focus {
    outline: none;
}

/* ---------- Book + FAQ ---------- */
.sb-ln-book {
    display: flex;
    gap: var(--sb-space-xl);
    align-items: center;
}

.sb-ln-book-cover {
    flex: 0 0 auto;
    width: 120px;
}

.sb-ln-book-cover img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 3px 8px 8px 3px;
    box-shadow: 8px 10px 22px rgba(0, 0, 0, .3);
}

.sb-ln-book p {
    margin: 0 0 8px;
    color: var(--ln-muted);
}

.sb-ln-faq-item {
    margin-bottom: 10px;
    background: var(--ln-card);
    border: 1px solid var(--ln-line);
    border-radius: var(--sb-radius-lg);
}

.sb-ln-faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 56px;
    padding: 12px 18px;
    cursor: pointer;
    font-weight: 700;
    color: var(--ln-head);
    list-style: none;
}

.sb-ln-faq-item summary::-webkit-details-marker {
    display: none;
}

.sb-ln-faq-item summary b::before {
    content: "+";
    font-size: 22px;
    color: var(--ln-accent);
}

.sb-ln-faq-item[open] summary b::before {
    content: "−";
}

.sb-ln-faq-item p {
    margin: 0;
    padding: 0 18px 16px;
    color: var(--ln-muted);
}

/* ---------- Motion: reveal + sketches drawn in ink ---------- */
.sb-ln-js .sb-ln-rv {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .6s ease, transform .6s ease;
}

.sb-ln-js .sb-ln-rv.is-in {
    opacity: 1;
    transform: none;
}

.sb-ln-js .sb-ln-sketch .sk-p {
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
    transition: stroke-dashoffset 2.4s cubic-bezier(.45, .05, .3, 1);
}

.sb-ln-js .sb-ln-sketch .sk-p:nth-child(3n+2) {
    transition-delay: .25s;
}

.sb-ln-js .sb-ln-sketch .sk-p:nth-child(3n) {
    transition-delay: .5s;
}

.sb-ln-js .sb-ln-sketch .sk-w,
.sb-ln-js .sb-ln-sketch .sk-f,
.sb-ln-js .sb-ln-sketch .sk-d {
    opacity: 0;
    transition: opacity 1.2s ease 1.4s;
}

.sb-ln-js .sb-ln-sketch.is-drawn .sk-p {
    stroke-dashoffset: 0;
}

.sb-ln-js .sb-ln-sketch.is-drawn .sk-w,
.sb-ln-js .sb-ln-sketch.is-drawn .sk-f,
.sb-ln-js .sb-ln-sketch.is-drawn .sk-d {
    opacity: 1;
}

.sb-ln-sketch g.sk-f {
    transform-box: fill-box;
    transform-origin: 50% 100%;
    animation: sb-ln-flicker 2.2s ease-in-out infinite alternate;
}

.sb-ln-sketch g.sk-f:nth-of-type(2n) {
    animation-duration: 1.7s;
}

@keyframes sb-ln-flicker {
    0% { transform: scale(1, 1); }
    50% { transform: scale(.94, 1.06); }
    100% { transform: scale(1.03, .95); }
}

@media (prefers-reduced-motion: reduce) {
    .sb-ln-sketch g.sk-f {
        animation: none;
    }

    .sb-ln-card-art .sb-ln-sketch {
        transition: none;
    }
}

/* ---------- Small screens ---------- */
@media (max-width: 600px) {
    .sb-ln-hero-art {
        transform: none;
    }

    .sb-ln-cta .sb-btn {
        width: 100%;
    }

    .sb-ln-photo {
        flex-direction: column;
    }

    .sb-ln-book {
        flex-direction: column;
        text-align: center;
    }

    .sb-ln-leaf {
        padding: var(--sb-space-lg);
    }
}