:root {
    --bg: #0b0e0d;
    --surface: #121715;
    --surface-2: #19201d;
    --surface-3: #222a26;
    --text: #f6f3e9;
    --muted: #a5ada7;
    --muted-2: #7f8882;
    --line: rgba(255, 255, 255, 0.1);
    --accent: #e8d86b;
    --accent-strong: #f5e56f;
    --ink: #151713;
    --success: #7bc89c;
    --danger: #e98d83;
    --radius-sm: 10px;
    --radius: 18px;
    --radius-lg: 28px;
    --shadow: 0 22px 65px rgba(0, 0, 0, 0.25);
    --shell: min(1180px, calc(100% - 40px));
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 92px;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    background:
        radial-gradient(circle at 82% -8%, rgba(232, 216, 107, 0.1), transparent 34rem),
        radial-gradient(circle at 0% 52%, rgba(71, 112, 91, 0.08), transparent 38rem),
        linear-gradient(180deg, #0b0e0d 0%, #0e1411 52%, #0b0e0d 100%);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

button,
input,
select {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: inherit;
}

img,
video {
    max-width: 100%;
}

h1,
h2,
h3,
p,
dl,
dd {
    margin-top: 0;
}

h1,
h2,
h3 {
    letter-spacing: -0.035em;
    line-height: 1.08;
}

h1 {
    font-size: clamp(3rem, 7vw, 6.8rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3.8rem);
}

h3 {
    font-size: 1.35rem;
}

.shell {
    width: var(--shell);
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 100;
    padding: 10px 16px;
    border-radius: 8px;
    color: var(--ink);
    background: var(--accent);
    transform: translateY(-150%);
}

.skip-link:focus {
    transform: translateY(0);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    border-bottom: 1px solid var(--line);
    background: rgba(11, 14, 13, 0.87);
    backdrop-filter: blur(18px);
}

.header-inner {
    display: flex;
    min-height: 76px;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-mark,
.login-mark {
    display: grid;
    width: 43px;
    aspect-ratio: 1;
    place-items: center;
    border: 1px solid rgba(232, 216, 107, 0.52);
    border-radius: 50%;
    color: var(--accent);
    font-family: Georgia, serif;
    font-size: 1.3rem;
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.brand small {
    color: var(--muted-2);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.main-navigation {
    display: flex;
    align-items: center;
    gap: 28px;
}

.main-navigation a,
.nav-user {
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 650;
    text-decoration: none;
}

.main-navigation a:hover,
.main-navigation a:focus-visible,
.main-navigation a[aria-current="page"] {
    color: var(--text);
}

.main-navigation .nav-action {
    padding: 9px 16px;
    border: 1px solid var(--line);
    border-radius: 999px;
}

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 11px;
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--text);
    background: transparent;
}

.menu-toggle span:not(.visually-hidden) {
    display: block;
    height: 2px;
    margin: 4px 0;
    border-radius: 2px;
    background: currentColor;
}

.hero {
    position: relative;
    overflow: hidden;
    padding: clamp(70px, 10vw, 132px) 0 84px;
}

.hero::after {
    content: "";
    position: absolute;
    width: 520px;
    height: 520px;
    top: 0;
    right: -160px;
    border: 1px solid rgba(232, 216, 107, 0.1);
    border-radius: 50%;
    box-shadow: 0 0 0 90px rgba(232, 216, 107, 0.025), 0 0 0 180px rgba(232, 216, 107, 0.018);
    pointer-events: none;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(300px, 0.7fr);
    gap: clamp(40px, 8vw, 110px);
    align-items: center;
}

.overline {
    margin-bottom: 16px;
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 850px;
    margin-bottom: 28px;
}

.hero-intro,
.lead {
    max-width: 680px;
    color: var(--muted);
    font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 36px;
}

.button {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border: 1px solid transparent;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 800;
    line-height: 1.2;
    text-decoration: none;
    transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

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

.button-primary {
    color: var(--ink);
    background: var(--accent-strong);
}

.button-primary:hover {
    background: #fff18b;
}

.button-secondary {
    color: var(--text);
    border-color: var(--line);
    background: rgba(255, 255, 255, 0.035);
}

.button-secondary:hover {
    border-color: rgba(232, 216, 107, 0.45);
}

.button-block {
    width: 100%;
}

.hero-panel {
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, rgba(255,255,255,0.07), rgba(255,255,255,0.015));
    box-shadow: var(--shadow);
}

.focus-ring {
    display: grid;
    width: min(260px, 75%);
    aspect-ratio: 1;
    margin: 8px auto 32px;
    place-items: center;
    border: 1px solid rgba(232, 216, 107, 0.25);
    border-radius: 50%;
    background:
        radial-gradient(circle, rgba(232, 216, 107, 0.15) 0 2px, transparent 3px),
        radial-gradient(circle, rgba(232, 216, 107, 0.05), transparent 65%);
    background-size: 18px 18px, auto;
    box-shadow: inset 0 0 0 28px rgba(255, 255, 255, 0.018);
}

.focus-ring span {
    color: var(--accent);
    font-family: Georgia, serif;
    font-size: clamp(4rem, 8vw, 7rem);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 0;
}

.hero-stats div {
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.hero-stats dt {
    font-size: 1.5rem;
    font-weight: 850;
}

.hero-stats dd {
    color: var(--muted-2);
    font-size: 0.72rem;
    line-height: 1.35;
}

.style-strip,
.grade-strip,
.catalogue-section,
.content-page,
.kata-detail {
    padding: 84px 0;
}

.grade-strip {
    border-block: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.022);
}

.style-strip {
    padding-bottom: 64px;
}

.style-chooser {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.style-choice {
    position: relative;
    display: flex;
    min-height: 136px;
    align-items: center;
    gap: 15px;
    overflow: hidden;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    text-decoration: none;
    transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.style-choice:hover,
.style-choice:focus-visible {
    transform: translateY(-3px);
    border-color: rgba(232, 216, 107, 0.42);
}

.style-choice.is-active {
    border-color: rgba(232, 216, 107, 0.7);
    background: linear-gradient(145deg, rgba(232, 216, 107, 0.11), var(--surface));
}

.style-logo {
    display: grid;
    width: 76px;
    height: 76px;
    flex: 0 0 auto;
    place-items: center;
    overflow: visible;
    opacity: 0.72;
    transition: opacity 160ms ease, transform 160ms ease;
}

.style-choice:hover .style-logo,
.style-choice:focus-visible .style-logo,
.style-choice.is-active .style-logo {
    opacity: 1;
    transform: scale(1.03);
}

.style-logo img {
    display: block;
    width: 72px;
    height: 72px;
    object-fit: contain;
}

.style-logo--all {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.style-logo--all i {
    display: block;
    width: 11px;
    height: 46px;
    border-radius: 999px;
    background: rgba(246, 243, 233, 0.84);
}

.style-logo--all i:nth-child(2) {
    height: 62px;
}

.style-choice strong,
.style-choice small {
    display: block;
}

.style-choice strong {
    margin-bottom: 5px;
    font-size: 1.05rem;
}

.style-choice small {
    color: var(--muted-2);
    font-size: 0.72rem;
    line-height: 1.4;
}

.section-heading {
    margin-bottom: 34px;
}

.section-heading h2 {
    margin-bottom: 0;
}

.section-heading-row {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 30px;
}

.section-heading-row > p {
    max-width: 440px;
    margin-bottom: 4px;
    color: var(--muted);
}

.section-heading-actions {
    max-width: 440px;
}

.section-heading-actions p {
    margin-bottom: 8px;
    color: var(--muted);
}

.grade-picker-mobile {
    display: none;
}

.grade-list {
    display: grid;
    grid-template-columns: repeat(7, minmax(120px, 1fr));
    gap: 10px;
}

.grade-link {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 10px;
    padding: 13px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.16);
    text-decoration: none;
    transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.grade-link:hover {
    transform: translateY(-2px);
    border-color: rgba(232, 216, 107, 0.35);
    background: rgba(255, 255, 255, 0.045);
}

.grade-link.is-active {
    border-color: rgba(232, 216, 107, 0.72);
    background: rgba(232, 216, 107, 0.1);
    box-shadow: inset 0 0 0 1px rgba(232, 216, 107, 0.16);
}

.belt-swatch {
    width: 8px;
    height: 34px;
    flex: 0 0 auto;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 999px;
    background: var(--belt-colour);
}

.grade-link strong,
.grade-link small {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.grade-link strong {
    font-size: 0.83rem;
}

.grade-link small {
    color: var(--muted-2);
    font-size: 0.66rem;
}

.catalogue-section {
    min-height: 70vh;
}

.catalogue-heading {
    margin-bottom: 28px;
}

.filter-disclosure > summary {
    display: none;
}

.filter-panel {
    display: grid;
    grid-template-columns: minmax(230px, 1.6fr) repeat(4, minmax(112px, 0.75fr)) auto;
    gap: 12px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(18, 23, 21, 0.94);
    box-shadow: var(--shadow);
}

.filter-panel label,
.login-form label {
    display: block;
    margin: 0 0 7px 2px;
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 750;
    letter-spacing: 0.04em;
}

.filter-panel input,
.filter-panel select,
.login-form input {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--line);
    border-radius: 12px;
    outline: 0;
    color: var(--text);
    background: var(--surface-3);
}

.filter-panel input,
.login-form input {
    padding: 10px 12px;
}

.filter-panel select {
    padding: 10px 32px 10px 11px;
}

.filter-panel input:focus,
.filter-panel select:focus,
.login-form input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(232, 216, 107, 0.1);
}

.search-field {
    position: relative;
}

.search-field span {
    position: absolute;
    top: 50%;
    left: 13px;
    color: var(--muted-2);
    transform: translateY(-50%);
}

.search-field input {
    padding-left: 38px;
}

.filter-submit {
    align-self: end;
    min-height: 46px;
    border-radius: 12px;
}

.active-filter-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 18px 2px 0;
    color: var(--muted);
    font-size: 0.82rem;
}

.active-filter-row a,
.text-link {
    color: var(--accent);
    font-weight: 750;
    text-underline-offset: 4px;
}

.kata-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 28px;
}

.kata-card {
    min-width: 0;
}

.kata-card-link {
    display: flex;
    height: 100%;
    min-height: 225px;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--line);
    border-top: 8px solid var(--belt-colour, rgba(232, 216, 107, 0.4));
    border-radius: var(--radius);
    background: var(--surface);
    text-decoration: none;
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.kata-card-link:hover,
.kata-card-link:focus-visible {
    transform: translateY(-5px);
    border-color: rgba(232, 216, 107, 0.35);
    box-shadow: var(--shadow);
}

.kata-card-body {
    display: flex;
    height: 100%;
    flex-direction: column;
    padding: 20px;
}

.card-eyebrow,
.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.card-eyebrow {
    color: var(--muted-2);
    font-size: 0.68rem;
    font-weight: 750;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.availability {
    color: var(--success);
}

.availability i {
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-right: 6px;
    border-radius: 50%;
    background: currentColor;
}

.muted {
    color: var(--muted-2);
}

.kata-card h3 {
    margin: 25px 0 8px;
    font-size: clamp(1.55rem, 2.2vw, 2rem);
}

.alternate-name {
    margin-bottom: 20px;
    color: var(--muted-2);
    font-size: 0.78rem;
}

.card-footer {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--line);
}

.grade-summary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-width: 150px;
    padding: 9px 12px 9px 10px;
    border: 1px solid var(--line);
    border-left: 8px solid var(--belt-colour);
    border-radius: 12px;
    background: var(--surface-2);
}

.grade-summary > i {
    width: 13px;
    height: 44px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 999px;
    background: var(--belt-colour);
}

.grade-summary small,
.grade-summary strong {
    display: block;
}

.grade-summary small {
    color: var(--muted-2);
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.grade-summary strong {
    margin-top: 1px;
    font-size: 1rem;
}

.grade-summary em {
    display: block;
    margin-top: 1px;
    color: var(--muted);
    font-size: 0.68rem;
    font-style: normal;
}

.grade-summary-reference > i {
    background: var(--muted-2);
}

.grade-summary-reference {
    border-color: var(--line);
    border-left-color: var(--muted-2);
    background: var(--surface-2);
}

.grade-results {
    margin-top: 30px;
}

.grade-result-group + .grade-result-group {
    margin-top: 54px;
    padding-top: 42px;
    border-top: 1px solid var(--line);
}

.grade-group-heading {
    display: flex;
    align-items: center;
    gap: 14px;
}

.grade-group-heading p,
.grade-group-heading h3 {
    margin: 0;
}

.grade-group-heading p {
    color: var(--muted-2);
    font-size: 0.68rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.grade-group-heading h3 {
    font-size: 1.45rem;
}

.grade-group-heading > span:last-child {
    margin-left: auto;
    color: var(--muted-2);
    font-size: 0.78rem;
}

.grade-result-group .kata-grid {
    margin-top: 18px;
}

.view-link {
    color: var(--accent);
    font-size: 0.77rem;
    font-weight: 800;
}

.empty-state,
.video-empty {
    padding: 70px 24px;
    border: 1px dashed rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-lg);
    text-align: center;
    background: rgba(255, 255, 255, 0.018);
}

.empty-state {
    margin-top: 28px;
}

.empty-state > span,
.video-empty > span {
    display: block;
    margin-bottom: 12px;
    color: rgba(232, 216, 107, 0.35);
    font-family: Georgia, serif;
    font-size: 4rem;
}

.empty-state p,
.video-empty p {
    color: var(--muted);
}

.site-footer {
    padding: 42px 0;
    border-top: 1px solid var(--line);
    background: rgba(0, 0, 0, 0.14);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 30px;
}

.site-footer p {
    margin: 4px 0 0;
    color: var(--muted-2);
    font-size: 0.8rem;
}

.footer-note {
    text-align: right;
}

.kata-detail {
    padding-top: 42px;
}

.breadcrumbs {
    display: flex;
    gap: 9px;
    margin-bottom: 58px;
    color: var(--muted-2);
    font-size: 0.8rem;
}

.breadcrumbs a {
    color: var(--muted);
    text-underline-offset: 3px;
}

.kata-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 36px;
    margin-bottom: 42px;
}

.kata-heading h1 {
    margin-bottom: 10px;
    font-size: clamp(3rem, 6vw, 6rem);
}

.kata-aliases {
    margin-bottom: 0;
    color: var(--muted);
}

.detail-grade {
    min-width: 180px;
    padding: 18px;
    border: 1px solid var(--line);
    border-left: 5px solid var(--belt-colour);
    border-radius: var(--radius-sm);
    background: var(--surface);
}

.detail-grade small,
.detail-grade strong,
.detail-grade span {
    display: block;
}

.detail-grade small,
.detail-grade span {
    color: var(--muted-2);
    font-size: 0.7rem;
}

.detail-grade strong {
    margin: 2px 0;
}

.kata-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 28px;
    align-items: start;
}

.video-area,
.kata-sidebar {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
}

.video-frame {
    display: grid;
    min-height: min(64vh, 680px);
    place-items: center;
    background: #030403;
}

.video-frame video {
    display: block;
    width: 100%;
    max-height: min(72vh, 760px);
}

.video-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 16px 18px;
    border-top: 1px solid var(--line);
}

.toolbar-label {
    display: block;
    color: var(--muted-2);
    font-size: 0.65rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.video-options {
    display: flex;
    gap: 8px;
}

.video-option {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted);
    background: transparent;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 750;
}

.video-option.is-active {
    color: var(--ink);
    border-color: var(--accent);
    background: var(--accent);
}

.video-option small {
    margin-left: 5px;
    opacity: 0.7;
}

.video-option .video-featured {
    padding: 2px 6px;
    border-radius: 999px;
    color: var(--text);
    background: rgba(255, 255, 255, 0.13);
    opacity: 1;
}

.kata-sidebar {
    padding: 24px;
}

.kata-sidebar > section > p:not(.overline) {
    color: var(--muted);
}

.personal-video-note {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
    padding: 11px 12px;
    border: 1px solid rgba(123, 200, 156, 0.28);
    border-radius: 11px;
    background: rgba(123, 200, 156, 0.075);
}

.personal-video-note > i {
    width: 9px;
    height: 9px;
    flex: 0 0 auto;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 5px rgba(123, 200, 156, 0.08);
}

.personal-video-note strong,
.personal-video-note small {
    display: block;
}

.personal-video-note strong {
    font-size: 0.82rem;
}

.personal-video-note small {
    color: var(--muted);
    font-size: 0.7rem;
}

.detail-list {
    margin: 28px 0;
    border-block: 1px solid var(--line);
}

.detail-list div {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 0;
}

.detail-list div + div {
    border-top: 1px solid var(--line);
}

.detail-list dt {
    color: var(--muted-2);
}

.detail-list dd {
    text-align: right;
    font-weight: 750;
}

.kata-sidebar .text-link {
    display: inline-block;
    margin-top: 22px;
    font-size: 0.82rem;
}

.kata-sequence {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 14px;
    align-items: stretch;
    margin-top: 28px;
}

.kata-sequence-link,
.kata-sequence-context,
.kata-sequence-spacer {
    min-height: 92px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface);
}

.kata-sequence-link {
    display: flex;
    min-width: 0;
    flex-direction: column;
    justify-content: center;
    padding: 15px 18px;
    text-decoration: none;
    transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.kata-sequence-link:hover,
.kata-sequence-link:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(232, 216, 107, 0.45);
    background: var(--surface-2);
}

.kata-sequence-link small,
.kata-sequence-context small {
    color: var(--muted-2);
    font-size: 0.68rem;
    font-weight: 750;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.kata-sequence-link strong {
    overflow: hidden;
    margin-top: 3px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.kata-sequence-next {
    text-align: right;
}

.kata-sequence-context {
    display: flex;
    min-width: 180px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 12px 18px;
    text-align: center;
}

.kata-sequence-context a {
    margin-top: 3px;
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 750;
}

.scroll-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 40;
    display: flex;
    min-width: 52px;
    min-height: 52px;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 14px;
    border: 1px solid rgba(232, 216, 107, 0.45);
    border-radius: 999px;
    color: var(--ink);
    background: var(--accent-strong);
    box-shadow: 0 12px 34px rgba(0, 0, 0, 0.38);
    cursor: pointer;
    font-weight: 850;
    opacity: 0;
    pointer-events: none;
    transform: translateY(14px);
    transition: opacity 160ms ease, transform 160ms ease;
}

.scroll-top.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.syllabus-intro {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 34px;
}

.syllabus-intro h1 {
    max-width: 900px;
}

.syllabus-jump {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 8px;
    margin: 52px 0 30px;
}

.syllabus-jump a {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 8px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface);
    font-size: 0.74rem;
    font-weight: 750;
    text-decoration: none;
}

.syllabus-jump i {
    width: 7px;
    height: 25px;
    flex: 0 0 auto;
    border-radius: 999px;
    background: var(--belt-colour);
}

.syllabus-jump span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.syllabus-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.syllabus-grade {
    overflow: hidden;
    border: 1px solid var(--line);
    border-top: 7px solid var(--belt-colour);
    border-radius: var(--radius);
    background: var(--surface);
    scroll-margin-top: 100px;
}

.syllabus-grade > header {
    display: flex;
    align-items: center;
    gap: 13px;
    padding: 20px 22px;
    border-bottom: 1px solid var(--line);
}

.syllabus-grade header p,
.syllabus-grade header h2 {
    margin: 0;
}

.syllabus-grade header p {
    color: var(--muted-2);
    font-size: 0.68rem;
}

.syllabus-grade header h2 {
    margin-top: 1px;
    font-size: 1.45rem;
}

.syllabus-grade header > a {
    margin-left: auto;
    color: var(--accent);
    font-size: 0.74rem;
    font-weight: 750;
}

.syllabus-added {
    padding: 22px;
}

.syllabus-added h3 {
    margin-bottom: 12px;
    color: var(--muted);
    font-size: 0.76rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.syllabus-added ul,
.syllabus-complete ol {
    margin: 0;
    padding-left: 1.25rem;
}

.syllabus-added li + li,
.syllabus-complete li + li {
    margin-top: 5px;
}

.syllabus-added a,
.syllabus-complete a {
    text-decoration-color: rgba(232, 216, 107, 0.28);
    text-underline-offset: 3px;
}

.syllabus-complete {
    border-top: 1px solid var(--line);
}

.syllabus-complete summary {
    padding: 15px 22px;
    color: var(--accent);
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 800;
}

.syllabus-complete ol {
    padding: 0 22px 22px 42px;
    columns: 2;
    column-gap: 26px;
    color: var(--muted);
    font-size: 0.84rem;
}

.syllabus-source-note {
    max-width: 760px;
    margin: 34px 0 0;
    color: var(--muted-2);
    font-size: 0.78rem;
}

.content-narrow {
    max-width: 940px;
}

.content-page h1 {
    max-width: 840px;
    margin-bottom: 24px;
    font-size: clamp(3rem, 6vw, 5.8rem);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin: 62px 0;
}

.guide-grid article,
.syllabus-note {
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
}

.guide-grid article > span {
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 800;
}

.guide-grid h2,
.syllabus-note h2 {
    margin: 34px 0 12px;
    font-size: 1.35rem;
}

.guide-grid p,
.syllabus-note p {
    margin-bottom: 0;
    color: var(--muted);
}

.syllabus-note h2 {
    margin-top: 0;
}

.login-section {
    display: grid;
    min-height: calc(100vh - 76px);
    padding: 70px 20px;
    place-items: center;
}

.login-card {
    display: grid;
    width: min(820px, 100%);
    grid-template-columns: 0.9fr 1.1fr;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.login-intro {
    padding: 48px;
    background:
        radial-gradient(circle at 30% 10%, rgba(232, 216, 107, 0.16), transparent 45%),
        var(--surface-2);
}

.login-mark {
    width: 72px;
    margin-bottom: 56px;
    font-size: 2.2rem;
}

.login-intro h1 {
    margin-bottom: 14px;
    font-size: 3rem;
}

.login-intro > p:last-child {
    color: var(--muted);
}

.login-form {
    padding: 48px;
    align-self: center;
}

.login-form input {
    margin-bottom: 18px;
    background: var(--surface-3);
}

.login-form .button {
    margin-top: 10px;
}

.form-error {
    padding: 11px 13px;
    border: 1px solid rgba(233, 141, 131, 0.32);
    border-radius: 10px;
    color: #ffd0cb;
    background: rgba(233, 141, 131, 0.08);
    font-size: 0.82rem;
}

.not-found {
    min-height: 70vh;
    padding: 120px 0;
}

.not-found h1 {
    margin-bottom: 20px;
}

.not-found > p:not(.overline) {
    color: var(--muted);
}

.training-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 32px;
    margin-bottom: 44px;
}

.training-heading h1 {
    margin-bottom: 18px;
}

.person-picker {
    min-width: 220px;
}

.person-picker label {
    display: block;
    margin-bottom: 7px;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 750;
}

.person-picker select {
    width: 100%;
    min-height: 46px;
    padding: 10px 32px 10px 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--text);
    background: var(--surface-3);
}

.record-grid {
    display: grid;
    grid-template-columns: minmax(280px, 0.8fr) minmax(360px, 1.2fr);
    gap: 22px;
    align-items: start;
}

.record-panel {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
}

.record-panel-heading {
    padding: 24px;
    border-bottom: 1px solid var(--line);
}

.record-panel-heading .overline,
.record-panel-heading h2 {
    margin-bottom: 6px;
}

.record-panel-heading h2 {
    font-size: 1.8rem;
}

.record-note {
    margin: 10px 0 0;
    color: var(--muted-2);
    font-size: 0.78rem;
}

.record-timeline {
    margin: 0;
    padding: 8px 24px;
    list-style: none;
}

.record-timeline li,
.learned-list > div {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 14px;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
}

.record-timeline li:last-child,
.learned-list > div:last-child {
    border-bottom: 0;
}

.record-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 5px rgba(232, 216, 107, 0.08);
}

.record-timeline strong,
.record-timeline small,
.learned-list strong,
.learned-list small {
    display: block;
}

.record-timeline small,
.learned-list small,
.record-timeline time,
.learned-list time {
    color: var(--muted-2);
    font-size: 0.74rem;
}

.learned-list {
    padding: 8px 24px;
}

.learned-list > div {
    grid-template-columns: minmax(0, 1fr) auto;
}

@media (max-width: 1060px) {
    .grade-list {
        grid-template-columns: repeat(4, 1fr);
    }

    .filter-panel {
        grid-template-columns: repeat(3, 1fr);
    }

    .filter-search {
        grid-column: span 2;
    }

    .style-chooser,
    .kata-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .syllabus-jump {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 820px) {
    :root {
        --shell: min(100% - 28px, 680px);
    }

    .menu-toggle {
        display: block;
    }

    .main-navigation {
        position: absolute;
        top: calc(100% + 1px);
        right: 14px;
        left: 14px;
        display: none;
        align-items: stretch;
        flex-direction: column;
        gap: 0;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: 0 0 var(--radius) var(--radius);
        background: #111614;
        box-shadow: var(--shadow);
    }

    .main-navigation.is-open {
        display: flex;
    }

    .main-navigation a,
    .nav-user {
        padding: 12px;
    }

    .hero-grid,
    .kata-layout {
        grid-template-columns: 1fr;
    }

    .hero-panel {
        max-width: 520px;
    }

    .section-heading-row,
    .kata-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .grade-list {
        display: none;
    }

    .grade-picker-mobile {
        display: block;
        padding: 16px;
        border: 1px solid var(--line);
        border-radius: var(--radius);
        background: var(--surface);
    }

    .grade-picker-mobile label {
        display: block;
        margin-bottom: 7px;
        color: var(--muted);
        font-size: 0.72rem;
        font-weight: 750;
    }

    .grade-picker-mobile > div {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 9px;
    }

    .grade-picker-mobile select {
        width: 100%;
        min-height: 48px;
        padding: 10px 34px 10px 12px;
        border: 1px solid var(--line);
        border-radius: 12px;
        color: var(--text);
        background: var(--surface-3);
    }

    .filter-disclosure {
        border: 1px solid var(--line);
        border-radius: var(--radius);
        background: var(--surface);
        box-shadow: var(--shadow);
    }

    .filter-disclosure > summary {
        display: flex;
        min-height: 58px;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
        padding: 13px 16px;
        cursor: pointer;
        list-style: none;
    }

    .filter-disclosure > summary::-webkit-details-marker {
        display: none;
    }

    .filter-disclosure > summary strong,
    .filter-disclosure > summary small {
        display: block;
    }

    .filter-disclosure > summary small {
        color: var(--muted-2);
        font-size: 0.68rem;
    }

    .filter-disclosure > summary > span:last-child {
        color: var(--accent);
        font-size: 0.76rem;
        font-weight: 800;
    }

    .filter-disclosure .filter-panel {
        grid-template-columns: repeat(2, 1fr);
        border: 0;
        border-top: 1px solid var(--line);
        border-radius: 0 0 var(--radius) var(--radius);
        box-shadow: none;
    }

    .filter-disclosure:not([open]) .filter-panel {
        display: none;
    }

    .kata-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .kata-layout {
        grid-template-columns: 1fr;
    }

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

    .kata-sequence-context {
        grid-column: 1 / -1;
        grid-row: 1;
    }

    .syllabus-intro {
        align-items: flex-start;
        flex-direction: column;
    }

    .syllabus-grid {
        grid-template-columns: 1fr;
    }

    .guide-grid {
        grid-template-columns: 1fr;
    }

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

    .training-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .record-grid {
        grid-template-columns: 1fr;
    }

    .login-intro,
    .login-form {
        padding: 36px;
    }

    .login-mark {
        margin-bottom: 36px;
    }
}

@media (max-width: 560px) {
    .hero {
        padding-top: 70px;
    }

    .hero h1 {
        font-size: clamp(2.85rem, 15vw, 4.5rem);
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .hero-stats div {
        display: flex;
        align-items: baseline;
        gap: 10px;
    }

    .filter-panel,
    .filter-disclosure .filter-panel {
        grid-template-columns: 1fr;
    }

    .filter-search {
        grid-column: auto;
    }

    .style-chooser,
    .kata-grid {
        grid-template-columns: 1fr;
    }

    .kata-card-link {
        min-height: 0;
    }

    .video-toolbar,
    .footer-inner {
        align-items: flex-start;
        flex-direction: column;
    }

    .video-options {
        width: 100%;
        flex-wrap: wrap;
    }

    .footer-note {
        text-align: left;
    }

    .detail-grade {
        width: 100%;
    }

    .grade-picker-mobile > div {
        grid-template-columns: 1fr;
    }

    .grade-picker-mobile .button {
        width: 100%;
    }

    .kata-sequence {
        gap: 10px;
    }

    .kata-sequence-link {
        padding: 13px;
    }

    .kata-sequence-link strong {
        white-space: normal;
    }

    .kata-sequence-spacer {
        display: none;
    }

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

    .syllabus-complete ol {
        columns: 1;
    }

    .scroll-top {
        right: 14px;
        bottom: 14px;
    }

    .login-intro,
    .login-form {
        padding: 28px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}