:root {
    color-scheme: dark;
    --bg: #0c0e0f;
    --surface: #151819;
    --surface-raised: #1d2123;
    --surface-hover: #272c2f;
    --viewport: #101314;
    --border: #303639;
    --border-strong: #495155;
    --text: #f1eee7;
    --text-muted: #a6aaa8;
    --text-dim: #747a7c;
    --brass: #c49a52;
    --brass-hover: #ddb86e;
    --brass-dark: #75582b;
    --brass-glow: rgb(196 154 82 / 18%);
    --danger: #db7268;
    --success: #70ad82;
    --radius: 10px;
    --radius-small: 7px;
    --shadow: 0 18px 48px rgb(0 0 0 / 32%);
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: var(--bg);
}

body {
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    margin: 0;
    padding: 24px;
    overflow: hidden;
    background:
        radial-gradient(circle at 80% -10%, rgb(196 154 82 / 9%), transparent 30rem),
        linear-gradient(145deg, #111415 0%, var(--bg) 52%);
    color: var(--text-muted);
    font-family: "Alexandria", system-ui, sans-serif;
}

a {
    color: var(--brass-hover);
}

a:hover {
    color: var(--text);
}

h1,
h2,
h3 {
    color: var(--text);
}

h1 {
    margin: 0;
    font-size: clamp(1.35rem, 2vw, 1.75rem);
    letter-spacing: -0.04em;
}

button,
input,
select {
    font: inherit;
}

button {
    min-height: 42px;
    padding: 0 16px;
    border: 1px solid transparent;
    border-radius: var(--radius-small);
    cursor: pointer;
    color: var(--text);
    transition: border-color 150ms ease, background 150ms ease, color 150ms ease,
        transform 150ms ease, box-shadow 150ms ease;
}

button:hover:not([disabled]) {
    transform: translateY(-1px);
}

button[disabled] {
    cursor: not-allowed;
    opacity: 0.42;
}

input,
select {
    width: 100%;
    min-height: 42px;
    padding: 9px 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius-small);
    outline: none;
    background: #101314;
    color: var(--text);
    transition: border-color 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

input:hover:not([disabled]),
select:hover:not([disabled]) {
    border-color: var(--border-strong);
    background: #131718;
}

input:focus,
select:focus {
    border-color: var(--brass);
    box-shadow: 0 0 0 3px var(--brass-glow);
}

input[disabled],
select[disabled] {
    color: var(--text-dim);
    font-style: italic;
}

#bitting::placeholder {
    color: rgb(166 170 168 / 42%);
    opacity: 1;
}

label {
    display: inline-block;
    margin-bottom: 7px;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.055em;
    text-transform: uppercase;
}

table {
    width: 100%;
    margin: 12px 0;
    border-collapse: collapse;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-small);
}

th,
td {
    padding: 10px;
    border: 1px solid var(--border);
    text-align: left;
}

th {
    background: var(--surface-hover);
    color: var(--text);
}

tr:nth-child(even) {
    background: rgb(255 255 255 / 3%);
}

dialog {
    width: min(720px, calc(100vw - 32px));
    max-height: min(84vh, 760px);
    max-height: min(84dvh, 760px);
    padding: 22px;
    overflow: hidden;
    border: 1px solid var(--border-strong);
    border-radius: 14px;
    background: var(--surface-raised);
    box-shadow: var(--shadow);
    color: var(--text-muted);
}

dialog::backdrop {
    background: rgb(0 0 0 / 68%);
    backdrop-filter: blur(5px);
}

#advanced-bitting-dialog {
    width: min(1120px, calc(100vw - 32px));
    padding: 18px;
}

dialog[open] {
    display: flex;
    flex-direction: column;
}

#advanced-bitting-info {
    min-width: 0;
    padding: 0 10px 8px 0;
    flex: 1 1 auto;
    max-height: none;
    overflow-x: auto;
}

#advanced-bitting-info .advanced-bitting-tables {
    align-items: stretch;
    flex-wrap: nowrap;
}

#advanced-bitting-info .advanced-bitting-tables table {
    min-width: 0;
    flex: 1 1 0;
    table-layout: fixed;
}

.dialog-toolbar {
    display: flex;
    flex: 0 0 auto;
    justify-content: flex-end;
    margin-bottom: 8px;
}

#content {
    width: 100%;
    height: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: rgb(21 24 25 / 96%);
    box-shadow: var(--shadow);
}

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

.brand-mark {
    display: grid;
    width: 36px;
    height: 36px;
    place-items: center;
    border: 1px solid var(--brass-dark);
    border-radius: 9px;
    background: linear-gradient(145deg, var(--brass-hover), var(--brass-dark));
    box-shadow: 0 5px 18px var(--brass-glow);
    color: #15110a;
}

.brand > div {
    display: flex;
    flex-direction: column;
}

.brand-subtitle {
    margin-top: 2px;
    color: var(--text-dim);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.field {
    margin: 0 0 16px;
}

.primary-button {
    border-color: #e0bd79;
    background: linear-gradient(180deg, var(--brass-hover), var(--brass));
    box-shadow: 0 6px 20px var(--brass-glow);
    color: #17120b;
    font-weight: 700;
}

.primary-button:hover:not([disabled]) {
    background: linear-gradient(180deg, #e7c47d, var(--brass-hover));
}

.secondary-button {
    border-color: var(--border-strong);
    background: var(--surface-raised);
    color: var(--text-muted);
}

.secondary-button:hover:not([disabled]) {
    border-color: var(--brass-dark);
    background: var(--surface-hover);
    color: var(--brass-hover);
}

.info-button {
    display: inline-grid;
    min-width: 40px;
    min-height: 40px;
    padding: 0 10px;
    place-items: center;
    border: 1px solid var(--border);
    background: transparent;
    box-shadow: none;
    color: var(--text-muted);
}

.info-button:hover:not([disabled]) {
    border-color: var(--brass-dark);
    background: var(--surface-hover);
    color: var(--brass-hover);
}

#generate {
    width: 100%;
    margin-top: 12px;
}

#generate.worker-loading {
    border-color: var(--border);
    background: var(--surface-raised);
    box-shadow: none;
    color: var(--text-dim);
    display: flex;
    gap: 8px;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    opacity: 1;
}

#generate.worker-failed {
    border-color: var(--danger);
    color: var(--danger);
    opacity: 0.72;
}

#generate .loading-spinner {
    width: 18px;
    height: 18px;
    margin: 0;
    display: inline-block;
    vertical-align: middle;
    border-width: 3px;
}

#generate.worker-loading .loading-spinner {
    border-color: rgb(196 154 82 / 28%);
    border-top-color: #f0cc87;
    box-shadow: 0 0 10px rgb(221 184 110 / 28%);
}

.even-flex {
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: space-evenly;
    flex-wrap: wrap;
}

.follower-end {
    margin: -4px 0 18px 12px;
    padding-left: 14px;
    border-left: 2px solid var(--brass-dark);
}

.hide {
    display: none !important;
}

.length-input {
    display: flex;
    width: 100%;
    overflow: hidden;
    border-radius: var(--radius-small);
}

.length-input:focus-within {
    border-color: var(--brass);
    box-shadow: 0 0 0 3px var(--brass-glow);
}

.length-input-text,
.length-input-select {
    border: 0;
    border-radius: 0;
    box-shadow: none !important;
}

.length-input-text {
    flex: 1;
}

.length-input-text:invalid {
    background: rgb(219 114 104 / 14%);
    color: #ffb4ad;
}

.length-input-select {
    width: 68px;
    border-left: 1px solid var(--border);
    cursor: pointer;
    color: var(--brass-hover);
}

.rotation-input-unit {
    width: 68px;
    min-height: 42px;
    display: grid;
    flex: 0 0 68px;
    place-items: center;
    border-left: 1px solid var(--border);
    color: var(--brass-hover);
}

.input-scroll,
.scrollable-dialog {
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-color: var(--brass-dark) var(--surface);
    scrollbar-gutter: stable;
}

.scrollable-dialog {
    max-height: calc(84vh - 44px);
    max-height: calc(84dvh - 44px);
    padding-right: 8px;
    touch-action: pan-y;
}

#about-info {
    flex: 1 1 auto;
    max-height: none;
}

.tab-select {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    padding: 5px;
    border-radius: var(--radius);
}

.length-input,
.tab-select {
    border: 1px solid var(--border);
    background: #101314;
}

.tab-select button {
    min-width: 0;
    min-height: 40px;
    border: 0;
    background: transparent;
    box-shadow: none;
    color: var(--text-dim);
}

.tab-select button img {
    width: 20px;
    height: 20px;
    opacity: 0.55;
    filter: grayscale(1) brightness(1.7);
}

.tab-select button.active {
    background: var(--surface-hover);
    box-shadow: inset 0 -2px var(--brass);
    color: var(--brass-hover);
}

.tab-select button.active img {
    opacity: 1;
    filter: sepia(1) saturate(0.7) brightness(1.3);
}

.tab {
    margin-top: 20px;
}

.input-pane {
    width: 370px;
    min-height: 0;
    padding: 22px;
    display: flex;
    flex: 0 0 370px;
    flex-direction: column;
    overflow: hidden;
    border-right: 1px solid var(--border);
    background: var(--surface);
}

.input-scroll {
    padding-right: 8px;
    flex: 1 1 auto;
}

.generate-footer {
    padding-top: 16px;
    flex: 0 0 auto;
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.view-pane {
    min-width: 0;
    padding: 20px;
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 14px;
    background: #111415;
}

.viewport-footer {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
}

.export-actions {
    display: flex;
    gap: 8px;
}

.export-actions .secondary-button:not([disabled]) {
    border-color: var(--brass-dark);
    background: linear-gradient(180deg, rgb(196 154 82 / 14%), var(--surface-raised));
    box-shadow: 0 4px 14px rgb(0 0 0 / 24%), inset 0 1px rgb(255 255 255 / 5%);
    color: var(--brass-hover);
    font-weight: 600;
}

.export-actions .secondary-button:hover:not([disabled]),
.export-actions .secondary-button:focus-visible:not([disabled]) {
    border-color: var(--brass);
    background: linear-gradient(180deg, rgb(196 154 82 / 22%), var(--surface-hover));
    box-shadow: 0 6px 18px var(--brass-glow), inset 0 1px rgb(255 255 255 / 7%);
    color: var(--text);
}

.viewport-help {
    color: var(--text-dim);
    font-size: 0.7rem;
}

#header {
    min-height: 76px;
    padding: 14px 20px;
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    background: rgb(29 33 35 / 86%);
}

#header-right {
    display: flex;
    gap: 8px;
}

#main {
    min-height: 0;
    display: flex;
    flex: 1 1 auto;
    overflow: hidden;
}

#model-view {
    min-height: 0;
    position: relative;
    flex: 1;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 12px;
    background:
        linear-gradient(rgb(196 154 82 / 4%) 1px, transparent 1px),
        linear-gradient(90deg, rgb(196 154 82 / 4%) 1px, transparent 1px),
        radial-gradient(circle at 50% 42%, #252a2c, var(--viewport) 68%);
    background-size: 32px 32px, 32px 32px, auto;
}

#model-view::before,
#model-view::after {
    width: 34px;
    height: 34px;
    position: absolute;
    z-index: 2;
    border-color: var(--brass-dark);
    pointer-events: none;
    content: "";
}

#model-view::before {
    top: 12px;
    left: 12px;
    border-top: 1px solid;
    border-left: 1px solid;
}

#model-view::after {
    right: 12px;
    bottom: 12px;
    border-right: 1px solid;
    border-bottom: 1px solid;
}

#canvas {
    width: 100%;
    height: 100%;
    min-height: 0;
    position: absolute;
    inset: 0;
    display: block;
}

#model-description {
    max-width: calc(100% - 32px);
    padding: 9px 12px;
    position: absolute;
    bottom: 16px;
    left: 16px;
    z-index: 3;
    border: 1px solid rgb(255 255 255 / 8%);
    border-radius: var(--radius-small);
    background: rgb(12 14 15 / 76%);
    backdrop-filter: blur(8px);
    color: var(--text-muted);
    font-size: 0.75rem;
}

#model-overlay-text {
    position: absolute;
    inset: 0;
    z-index: 4;
    display: grid;
    place-items: center;
    pointer-events: none;
    background: rgb(7 8 9 / 62%);
    backdrop-filter: blur(3px);
}

#model-overlay-text:empty {
    display: none;
}

#model-overlay-text > span {
    min-width: min(280px, calc(100% - 40px));
    max-width: calc(100% - 40px);
    padding: 20px 24px;
    display: flex;
    gap: 15px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--brass-dark);
    border-radius: var(--radius);
    background: rgb(29 33 35 / 96%);
    box-shadow: 0 14px 40px rgb(0 0 0 / 45%), 0 0 32px var(--brass-glow);
    color: var(--text);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.025em;
    text-align: center;
}

#info {
    min-height: 20px;
    font-size: 0.76rem;
    line-height: 1.45;
}

#info.info-message,
#info.info-error {
    padding: 9px 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius-small);
    background: rgb(255 255 255 / 3%);
}

#info.info-message {
    color: var(--text-muted);
}

#info.info-error {
    border-color: color-mix(in srgb, var(--danger) 55%, var(--border));
    background: rgb(219 114 104 / 8%);
    color: var(--danger);
}

#bitting-instructions,
#settings-detail {
    border: 1px solid var(--border);
    border-radius: var(--radius-small);
    background: #111415;
}

#bitting-instructions {
    margin: 16px 0 10px;
    padding: 12px;
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.55;
}

#bitting-instructions:empty {
    display: none;
}

#show-advanced {
    width: 100%;
    min-height: 34px;
    margin-bottom: 14px;
    display: flex;
    gap: 8px;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
}

#loader {
    width: 100%;
    height: 100%;
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: grid;
    place-items: center;
    background: rgb(7 8 9 / 90%);
    backdrop-filter: blur(8px);
}

.loader-panel {
    width: min(620px, calc(100% - 40px));
    padding: 22px 26px;
    display: flex;
    gap: 18px;
    align-items: center;
    border: 1px solid var(--brass-dark);
    border-radius: var(--radius);
    background: var(--surface-raised);
    box-shadow: 0 0 28px var(--brass-glow);
}

.loader-panel > div {
    min-width: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.loader-panel > div > strong {
    color: var(--text);
    font-size: 1rem;
}

#status {
    color: var(--brass-hover);
    font-size: 0.78rem;
}

#boot-error-content {
    display: none;
    margin-top: 10px;
    color: var(--text-muted);
    font-size: 0.82rem;
    line-height: 1.5;
}

#boot-error-message {
    margin: 0 0 14px;
}

#boot-error-content details {
    margin-bottom: 16px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-small);
    background: var(--bg);
}

#boot-error-content summary {
    cursor: pointer;
    color: var(--text-dim);
}

#boot-error-details {
    max-height: min(30vh, 240px);
    margin: 10px 0 0;
    overflow: auto;
    color: var(--text-muted);
    font-size: 0.75rem;
    line-height: 1.45;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

#boot-retry {
    width: 100%;
}

#loader.boot-error .loader-panel {
    align-items: flex-start;
    border-color: color-mix(in srgb, var(--danger) 65%, var(--border));
    box-shadow: 0 0 28px rgb(219 114 104 / 16%);
}

#loader.boot-error #loader-spinner {
    display: none;
}

#loader.boot-error #loader-title,
#loader.boot-error #status {
    color: var(--danger);
}

#loader.boot-error #boot-error-content {
    display: block;
}

.loading-spinner {
    width: 26px;
    height: 26px;
    flex: 0 0 auto;
    border: 3px solid rgb(196 154 82 / 22%);
    border-top-color: var(--brass-hover);
    border-radius: 50%;
    box-shadow: 0 0 14px var(--brass-glow);
    animation: spinner-rotate 800ms linear infinite;
}

#loader-spinner {
    width: 38px;
    height: 38px;
    border-width: 4px;
}

@keyframes spinner-rotate {
    to {
        transform: rotate(360deg);
    }
}

#settings-detail {
    margin: 14px 0;
    padding: 14px;
}

#share-setup label {
    margin: 0 0 12px 8px;
    text-transform: none;
}

#share-setup input {
    width: 18px;
    min-height: 18px;
    accent-color: var(--brass);
}

#toast {
    max-width: min(420px, calc(100vw - 32px));
    margin: 0;
    padding: 0;
    position: fixed;
    inset: auto 24px 24px auto;
    overflow: visible;
    border: 0;
    background: transparent;
    color: var(--text);
}

#toast:popover-open {
    display: block;
    animation: toast-enter 180ms ease-out;
}

#toast::backdrop {
    background: transparent;
    backdrop-filter: none;
    pointer-events: none;
}

#toast > div {
    padding: 14px 16px;
    display: flex;
    gap: 11px;
    align-items: center;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    background: rgb(29 33 35 / 98%);
    box-shadow: 0 12px 34px rgb(0 0 0 / 48%);
    font-size: 0.8rem;
    line-height: 1.4;
}

#toast > div > i {
    font-size: 1.05rem;
}

.toast-success {
    border-color: color-mix(in srgb, var(--success) 65%, var(--border));
}

.toast-success i {
    color: var(--success);
}

.toast-failure {
    border-color: color-mix(in srgb, var(--danger) 65%, var(--border));
}

.toast-failure i {
    color: var(--danger);
}

@keyframes toast-enter {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

@media (max-width: 900px) {
    body {
        padding: 12px;
    }

    #main {
        flex-direction: column-reverse;
        overflow-y: auto;
    }

    .input-pane {
        width: 100%;
        flex-basis: auto;
        overflow: visible;
        border-top: 1px solid var(--border);
        border-right: 0;
    }

    .input-scroll {
        padding-right: 0;
        overflow: visible;
    }

    .view-pane {
        flex: 0 0 auto;
    }

    #model-view {
        min-height: 440px;
    }
}

@media (max-width: 560px) {
    body {
        padding: 0;
    }

    #content {
        border-right: 0;
        border-left: 0;
        border-radius: 0;
    }

    #header {
        padding: 12px 14px;
    }

    .brand-subtitle,
    .viewport-help {
        display: none;
    }

    .input-pane,
    .view-pane {
        padding: 14px;
    }

    #model-view {
        min-height: 340px;
    }

    .viewport-footer {
        align-items: stretch;
        flex-direction: column;
    }

    .export-actions button {
        flex: 1;
    }

    #toast {
        inset: auto 12px 12px 12px;
        max-width: none;
    }
}

@media (max-width: 720px) {
    #advanced-bitting-info .advanced-bitting-tables {
        flex-wrap: wrap;
    }

    #advanced-bitting-info .advanced-bitting-tables table {
        flex-basis: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }

    .loading-spinner {
        animation-duration: 1.6s;
    }
}