/* ============================================================
   Articulator Baser — visual system
   Calm clinical tool: deep navy viewport, warm paper
   panels, one loud yellow action. No glass, no noise.
   ============================================================ */

:root {
    /* Brand */
    --navy: #002664;
    --blue: #007DAC;
    --yellow: #FCD900;
    --yellow-deep: #E9C400;

    /* Viewport backdrop */
    --void-1: #0B2452;
    --void-2: #030D24;

    /* Paper surfaces (Claude-app warmth) */
    --paper: #FAF9F5;
    --paper-2: #F1EEE5;
    --ink: #22211C;
    --ink-soft: #6B675A;
    --line: rgba(34, 33, 28, 0.13);

    --on-navy: #E9EFFB;
    --on-navy-soft: #9DB4E0;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;

    --shadow-panel: 0 18px 48px rgba(1, 8, 26, 0.45), 0 2px 8px rgba(1, 8, 26, 0.3);
    --shadow-bar: 0 14px 36px rgba(1, 8, 26, 0.5);

    --font-ui: "Instrument Sans", "Avenir Next", "Segoe UI", sans-serif;
    --font-display: "Source Serif 4", Georgia, serif;

    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-ui);
    color: var(--ink);
    background:
        radial-gradient(120% 90% at 50% 18%, var(--void-1) 0%, var(--void-2) 78%);
    -webkit-font-smoothing: antialiased;
}

#canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

button {
    font-family: inherit;
}

[hidden] {
    display: none !important;
}

/* ---------------- Top bar ---------------- */

#topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 18px 22px;
    pointer-events: none;
    z-index: 30;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    pointer-events: auto;
    user-select: none;
}

.brand-arc {
    width: 30px;
    color: var(--yellow);
    flex-shrink: 0;
    margin-top: -8px;
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.brand-name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--on-navy);
    letter-spacing: 0.01em;
}

.brand-sub {
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--on-navy-soft);
}

.topbar-actions {
    display: flex;
    gap: 8px;
    pointer-events: auto;
}

/* ---------------- Buttons ---------------- */

.icon-btn {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-md);
    border: 1px solid rgba(233, 239, 251, 0.22);
    background: rgba(233, 239, 251, 0.07);
    color: var(--on-navy);
    cursor: pointer;
    transition: background 150ms ease, transform 150ms ease;
}

.icon-btn svg {
    width: 19px;
    height: 19px;
}

.icon-btn:hover {
    background: rgba(233, 239, 251, 0.16);
    transform: translateY(-1px);
}

.icon-btn-sm {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    color: var(--ink-soft);
    border-radius: var(--radius-sm);
}

.icon-btn-sm:hover {
    background: var(--paper-2);
    transform: none;
}

.icon-btn-sm svg {
    width: 15px;
    height: 15px;
}

.btn {
    border: none;
    border-radius: 10px;
    padding: 10px 18px;
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    white-space: nowrap;
    cursor: pointer;
    transition: transform 140ms ease, box-shadow 140ms ease,
        background 140ms ease, filter 140ms ease;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--yellow);
    color: #16264A;
    box-shadow: 0 3px 0 var(--yellow-deep), 0 10px 22px rgba(0, 0, 0, 0.28);
}

.btn-primary:hover {
    filter: brightness(1.05);
    transform: translateY(-1px);
    box-shadow: 0 4px 0 var(--yellow-deep), 0 14px 26px rgba(0, 0, 0, 0.32);
}

.btn-primary:active {
    transform: translateY(2px);
    box-shadow: 0 1px 0 var(--yellow-deep), 0 6px 14px rgba(0, 0, 0, 0.25);
}

.btn-primary:disabled {
    filter: saturate(0.45) brightness(0.92);
    cursor: default;
    transform: none;
}

.btn-ghost {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line);
}

.btn-ghost:hover {
    background: var(--paper-2);
}

.btn-block {
    width: 100%;
    margin-top: 12px;
}

button:focus-visible,
input:focus-visible,
a:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 2px;
}

select:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 2px;
}

.drop-privacy a { color: inherit; text-underline-offset: 3px; }
.panel-hint a { color: var(--navy); text-underline-offset: 3px; }
.pattern-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 10px 0 16px; }
.pattern-card { padding: 8px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); color: var(--ink); cursor: pointer; text-align: left; }
.pattern-card:hover { border-color: var(--blue); background: var(--paper-2); }
.pattern-card[aria-pressed="true"] { border-color: var(--blue); box-shadow: 0 0 0 1px var(--blue); background: #eaf3f6; }
.pattern-card svg { display: block; width: 100%; height: 42px; padding: 3px; background: var(--navy); border-radius: 5px; fill: #dae8f2; stroke: #dae8f2; stroke-width: 0; }
.pattern-name { display: flex; align-items: center; justify-content: space-between; gap: 4px; margin-top: 6px; font-size: 0.73rem; font-weight: 600; }
.pattern-name small { color: #00608a; font-size: 0.58rem; text-transform: uppercase; letter-spacing: 0.06em; }
.engraving-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 10px 0; }
.engraving-options label { font-size: 0.72rem; color: var(--ink-soft); }
.engraving-options select { display: block; width: 100%; margin-top: 5px; padding: 7px; border: 1px solid var(--line); border-radius: 6px; background: var(--paper); color: var(--ink); font: inherit; }
.engraving-proof { padding: 10px 12px; border-radius: 9px; background: #e5e9e8; border: 1px solid #c8d3d3; text-align: center; }
.engraving-proof svg { display: block; width: 100%; height: 56px; fill: #1c4258; }
.engraving-proof span { display: block; font-size: 0.64rem; line-height: 1.4; color: #45616e; }
.engraving-proof.has-error { border-color: #bd791f; background: #fff0d8; }
.engraving-warning { color: #92580c !important; font-weight: 600; }

#topbar button:focus-visible {
    outline-color: var(--yellow);
}

/* ---------------- View cube ---------------- */

#view-cube-container {
    position: fixed;
    top: 74px;
    right: 22px;
    width: 92px;
    height: 92px;
    z-index: 20;
    opacity: 0;
    pointer-events: none;
    transition: opacity 500ms ease 200ms;
}

body.has-model #view-cube-container {
    opacity: 0.92;
    pointer-events: auto;
}

#view-cube-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* ---------------- Drop screen ---------------- */

#drop-screen {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    z-index: 25;
    pointer-events: none;
}

.drop-card {
    pointer-events: auto;
    background: var(--paper);
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 22px;
    box-shadow: var(--shadow-panel);
    padding: 46px 60px 44px;
    text-align: center;
    max-width: 430px;
    animation: card-in 520ms var(--ease-spring) both;
}

@keyframes card-in {
    from {
        opacity: 0;
        transform: translateY(14px) scale(0.97);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.drop-card.leaving {
    animation: none;
    opacity: 0;
    transform: translateY(-10px) scale(0.97);
    transition: opacity 300ms ease, transform 300ms ease;
    pointer-events: none;
}

.drop-glyph {
    width: 46px;
    height: 46px;
    color: var(--blue);
    margin-bottom: 14px;
}

.drop-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.85rem;
    color: var(--ink);
    margin-bottom: 8px;
}

.drop-sub {
    font-size: 0.86rem;
    color: var(--ink-soft);
    margin-bottom: 24px;
}

/* Quiet enough to stay out of the way, present enough to be read once. */
.drop-privacy {
    margin: 18px 0 0;
    font-size: 0.76rem;
    color: var(--ink-soft);
    opacity: 0.75;
}

/* Full-window drag ring */
body.drag-active::after {
    content: "";
    position: fixed;
    inset: 14px;
    border: 2px dashed var(--yellow);
    border-radius: 18px;
    pointer-events: none;
    z-index: 90;
    animation: ring-pulse 1.2s ease-in-out infinite;
}

body.drag-active .drop-card {
    transform: scale(1.02);
}

@keyframes ring-pulse {

    0%,
    100% {
        opacity: 0.55;
    }

    50% {
        opacity: 1;
    }
}

/* ---------------- Panels ---------------- */

.panel {
    position: fixed;
    right: 22px;
    width: 306px;
    background: var(--paper);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-panel);
    padding: 16px 18px 18px;
    z-index: 40;
    animation: panel-in 260ms var(--ease-spring) both;
}

@keyframes panel-in {
    from {
        opacity: 0;
        transform: translateX(14px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

#settings-panel {
    top: 74px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

#inspector {
    bottom: 96px;
    max-height: calc(100dvh - 180px);
    overflow-y: auto;
}

.panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.panel-head h2 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.08rem;
    color: var(--ink);
}

.panel-section-title {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-soft);
    margin: 4px 0 10px;
}

.panel-hint {
    font-size: 0.76rem;
    line-height: 1.45;
    color: var(--ink-soft);
    margin-top: 12px;
}

.panel-footer {
    border-top: 1px solid var(--line);
    margin-top: 14px;
    padding-top: 12px;
}

.panel-footer-line {
    font-size: 0.74rem;
    color: var(--ink-soft);
}

kbd {
    display: inline-block;
    background: var(--paper-2);
    border: 1px solid var(--line);
    border-bottom-width: 2px;
    border-radius: 5px;
    padding: 0 5px;
    font-family: var(--font-ui);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--ink);
}

/* ---------------- Fields ---------------- */

.field-row {
    display: grid;
    grid-template-columns: 46px 1fr 58px 24px;
    align-items: center;
    gap: 8px;
    margin-bottom: 9px;
}

.field-row label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--ink-soft);
}

.field-row .unit {
    font-size: 0.72rem;
    color: var(--ink-soft);
}

input[type="range"] {
    appearance: none;
    -webkit-appearance: none;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(to right, var(--blue) var(--fill, 50%), var(--paper-2) var(--fill, 50%));
    cursor: pointer;
}

/* Height and clamp band on one track. Two range inputs are stacked over a
   drawn track: each keeps its own keyboard handling and its own thumb,
   while the bar underneath shows which stretch of wall is which. */
.dual-range {
    position: relative;
    height: 18px;
    display: flex;
    align-items: center;
}

.dual-range input[type="range"] {
    position: absolute;
    left: 0;
    width: 100%;
    margin: 0;
    background: none;
    pointer-events: none;
}

/* Only the thumbs take the pointer, so the two inputs can overlap without
   the upper one swallowing every click meant for the lower. */
.dual-range input[type="range"]::-webkit-slider-thumb {
    pointer-events: auto;
}

.dual-range input[type="range"]::-moz-range-thumb {
    pointer-events: auto;
}

.dual-range #base-clampband::-webkit-slider-thumb {
    border-color: var(--yellow);
}

.dual-range #base-clampband::-moz-range-thumb {
    border-color: var(--yellow);
}

.dual-track {
    position: relative;
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: var(--paper-2);
    overflow: hidden;
}

/* The solid band the clamp bites on, and the wall above it a pattern can open. */
.dual-clamp,
.dual-wall {
    position: absolute;
    top: 0;
    height: 100%;
}

.dual-clamp {
    left: 0;
    background: var(--yellow);
}

.dual-wall {
    background: var(--blue);
}

.field-row-sub {
    margin-top: -3px;
    margin-bottom: 11px;
}

.field-row-sub label {
    font-weight: 500;
    opacity: 0.85;
}

.dual-legend {
    font-size: 0.7rem;
    color: var(--ink-soft);
    opacity: 0.8;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--blue);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
    cursor: grab;
}

input[type="range"]::-moz-range-thumb {
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--blue);
    cursor: grab;
}

input[type="number"] {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: #fff;
    padding: 5px 7px;
    font-family: var(--font-ui);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--ink);
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.field-row-wide {
    grid-template-columns: 46px 1fr;
}

.field-row-text {
    grid-template-columns: 46px 1fr;
}

.field-row-text input[type="text"] {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: #fff;
    padding: 6px 8px;
    font-family: var(--font-ui);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--ink);
    text-transform: uppercase;
}

.field-row-text input::placeholder {
    text-transform: none;
    color: color-mix(in srgb, var(--ink-soft) 70%, transparent);
}

select {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: #fff;
    padding: 6px 8px;
    font-family: var(--font-ui);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--ink);
    cursor: pointer;
}

.check-row {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 0.84rem;
    color: var(--ink);
    margin: 10px 0 2px;
    cursor: pointer;
    user-select: none;
}

.check-row input {
    width: 16px;
    height: 16px;
    accent-color: var(--blue);
    cursor: pointer;
}

/* ---------------- Action bar ---------------- */

#action-bar {
    position: fixed;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--paper);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 14px;
    box-shadow: var(--shadow-bar);
    padding: 9px 10px 9px 18px;
    z-index: 35;
    max-width: calc(100vw - 260px);
    animation: bar-in 420ms var(--ease-spring) both;
}

@keyframes bar-in {
    from {
        opacity: 0;
        transform: translate(-50%, 16px);
    }

    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

.file-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 130px;
    max-width: 240px;
}

.file-name {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dims-readout {
    font-size: 0.74rem;
    color: var(--ink-soft);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.action-buttons {
    display: flex;
    gap: 8px;
}

/* ---------------- Toast ---------------- */

#toast {
    position: fixed;
    bottom: 96px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--paper);
    color: var(--ink);
    font-size: 0.84rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-bar);
    padding: 10px 18px;
    z-index: 60;
    animation: toast-in 300ms var(--ease-spring) both;
    max-width: min(480px, 90vw);
    text-align: center;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translate(-50%, 10px);
    }

    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

/* ---------------- Processing overlay ---------------- */

#processing-overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 13, 36, 0.62);
    display: grid;
    place-items: center;
    z-index: 80;
}

.processing-card {
    background: var(--paper);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-panel);
    padding: 30px 42px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.processing-ring {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 3px solid rgba(0, 125, 172, 0.22);
    border-top-color: var(--blue);
    animation: spin 0.9s linear infinite;
}

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

#processing-status {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--ink);
}

/* ---------------- Corner greeter ---------------- */

#character {
    position: fixed;
    left: 30px;
    bottom: 0;
    z-index: 34;
}

/* While the note is open the bubble must beat the action bar. */
#character.open {
    z-index: 70;
}

#character.arrive {
    animation: character-arrive 650ms var(--ease-spring) both;
}

@keyframes character-arrive {
    from {
        transform: translateY(120px);
        opacity: 0;
    }

    to {
        transform: none;
        opacity: 1;
    }
}

.character-figure {
    display: block;
    width: 104px;
    height: 170px;
    border: none;
    background: transparent;
    cursor: pointer;
    transform: translateY(64%) rotate(7deg);
    transition: transform 420ms var(--ease-spring);
    transform-origin: bottom center;
    padding: 0;
}

.character-figure img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: bottom;
    animation: bob 4.2s ease-in-out infinite;
    filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.5));
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
}

.character-figure:hover {
    transform: translateY(52%) rotate(4deg);
}

#character.open .character-figure {
    transform: translateY(2%) rotate(0deg);
}

@keyframes bob {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

.character-bubble {
    position: absolute;
    left: 14px;
    bottom: 184px;
    width: 312px;
    background: var(--paper);
    border-radius: 16px 16px 16px 4px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-panel);
    padding: 20px 22px 18px;
    transform-origin: bottom left;
    opacity: 0;
    transform: scale(0.6) translateY(12px);
    transition: opacity 200ms ease, transform 200ms ease;
    pointer-events: none;
}

#character.open .character-bubble {
    opacity: 1;
    transform: none;
    pointer-events: auto;
    animation: bubble-pop 480ms var(--ease-spring) both;
}

@keyframes bubble-pop {
    0% {
        opacity: 0;
        transform: scale(0.55) translateY(14px);
    }

    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.character-bubble::after {
    content: "";
    position: absolute;
    left: 18px;
    bottom: -9px;
    width: 18px;
    height: 18px;
    background: var(--paper);
    clip-path: polygon(0 0, 100% 0, 22% 100%);
}

.bubble-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 26px;
    height: 26px;
    display: grid;
    place-items: center;
    border: none;
    background: transparent;
    color: var(--ink-soft);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.bubble-close:hover {
    background: var(--paper-2);
}

.bubble-close svg {
    width: 13px;
    height: 13px;
}

.bubble-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.02rem;
    color: var(--navy);
    margin-bottom: 8px;
    padding-right: 20px;
}

.bubble-body {
    font-size: 0.83rem;
    line-height: 1.55;
    color: var(--ink);
}

.bubble-signoff {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 0.88rem;
    color: var(--ink);
    margin-top: 8px;
}

.contact-card {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 12px 14px;
    background: var(--paper-2);
    border-radius: var(--radius-md);
    animation: card-in 240ms var(--ease-spring) both;
}

.contact-card a {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--navy);
    text-decoration: none;
    word-break: break-all;
}

.contact-card a:hover {
    text-decoration: underline;
}

.bubble-phone {
    display: inline-block;
    border: none;
    cursor: pointer;
    font-family: var(--font-ui);
    margin-top: 12px;
    background: var(--yellow);
    color: #16264A;
    font-size: 0.82rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 999px;
    padding: 8px 16px;
    box-shadow: 0 2px 0 var(--yellow-deep);
    transition: transform 140ms ease, filter 140ms ease;
}

.bubble-phone:hover {
    transform: translateY(-1px);
    filter: brightness(1.05);
}

/* ---------------- Motion preferences ---------------- */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ---------------- Small screens ---------------- */

@media (max-width: 760px) {
    .brand-sub {
        display: none;
    }

    .panel {
        width: min(306px, calc(100vw - 32px));
    }

    #action-bar {
        flex-direction: column;
        gap: 10px;
        padding: 12px 16px;
        max-width: calc(100vw - 24px);
    }

    .action-buttons {
        flex-wrap: wrap;
        justify-content: center;
    }

    .character-bubble {
        width: min(312px, calc(100vw - 60px));
    }
}