/* ==========================================================================
   Meglation — conversational site (layout after Locomotive's L.I.S.A.)
   ========================================================================== */

:root {
    --ink: #000;
    --paper: #fff;
    --muted: rgba(0, 0, 0, .45);
    --line: rgba(0, 0, 0, .14);
    --detail: rgba(0, 0, 0, .7);

    /* backdrop */
    --bg-center: #ececec;
    --bg-mid: #d3d3d3;
    --bg-edge: #a7a7a7;
    --bg-base: #c9c9c9;
    --fade: #c4c4c4;

    /* pill buttons */
    --btn-bg: #fff;
    --btn-fg: #000;
    --btn-hover-bg: #000;
    --btn-hover-fg: #fff;
    --btn2-fg: #fff;
    --btn2-line: rgba(255, 255, 255, .55);
    --invalid: #c62a22;

    --ease: cubic-bezier(0.215, 0.61, 0.355, 1);
    --speed: .3s;

    --margin: clamp(16px, 2.7vw, 56px);
    --header-h: clamp(64px, 7vw, 110px);
    --dialog-size: clamp(24px, 2.45vw, 48px);

    --sans: "Inter Tight", "Helvetica Neue", Helvetica, Arial, sans-serif;

    font-size: 15px;
}
@media (min-width: 1600px) { :root { font-size: 17px; } }
@media (min-width: 2000px) { :root { font-size: 19px; } }

/* Themes — html[data-theme] (light is the default :root)
   ========================================================================== */
html[data-theme="black"] {
    --ink: #f4f4f2;
    --paper: #0a0a0a;
    --muted: rgba(255, 255, 255, .5);
    --line: rgba(255, 255, 255, .18);
    --detail: rgba(255, 255, 255, .72);
    --bg-center: #262628;
    --bg-mid: #121213;
    --bg-edge: #000;
    --bg-base: #0b0b0c;
    --fade: #0d0d0e;
    --btn-bg: #f4f4f2;
    --btn-fg: #000;
    --btn-hover-bg: rgba(255, 255, 255, .14);
    --btn-hover-fg: #fff;
    --btn2-fg: rgba(255, 255, 255, .85);
    --btn2-line: rgba(255, 255, 255, .3);
    --invalid: #ff6b62;
}

/* Light / dark toggle — sits above the sound switch */
.c-theme-toggle {
    position: fixed;
    right: var(--margin);
    bottom: calc(var(--margin) + 5.6rem + .6rem);
    z-index: 10;
    width: 2.8rem; height: 2.8rem;
    display: grid; place-items: center;
    border-radius: 50%;
    border: 1px solid var(--line);
    color: var(--ink);
    transition: background-color var(--speed) var(--ease), color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.c-theme-toggle:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.c-theme-toggle svg { width: 42%; height: 42%; }
.c-theme-toggle .-sun { display: none; }
html[data-theme="black"] .c-theme-toggle .-sun { display: block; }
html[data-theme="black"] .c-theme-toggle .-moon { display: none; }

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

html, body {
    margin: 0;
    height: 100%;
    color: var(--ink);
    font-family: var(--sans);
    font-weight: 400;
    line-height: 1.3;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow: hidden;
}

/* Studio backdrop: soft light in the middle, falling off to grey */
body {
    background:
        radial-gradient(ellipse 60% 70% at 52% 48%, var(--bg-center) 0%, var(--bg-mid) 45%, var(--bg-edge) 100%);
    background-color: var(--bg-base);
    transition: background-color .6s var(--ease);
}
html.is-loading { cursor: wait; }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }

::selection { background: var(--ink); color: var(--paper); }
:focus-visible { outline: 1px solid var(--ink); outline-offset: 4px; }

/* Preloader
   ========================================================================== */
.c-preloader {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    background: #000;
    color: #fff;
    transition: opacity .9s var(--ease), visibility .9s;
}
html:not(.is-loading) .c-preloader { opacity: 0; visibility: hidden; pointer-events: none; }

.c-preloader_inner { text-align: center; }
.c-preloader_logo {
    font-size: clamp(40px, 6vw, 88px);
    letter-spacing: -.03em;
    line-height: 1;
    animation: preloaderAppear .9s var(--ease) .2s backwards;
}
.c-preloader_logo sup { font-size: .3em; vertical-align: top; margin-left: .1em; }
.c-preloader_words { margin-top: 1.2rem; min-height: 1.3em; font-size: .9rem; color: rgba(255, 255, 255, .55); }

@keyframes preloaderAppear {
    from { opacity: 0; transform: scale(.9); }
    to   { opacity: 1; transform: scale(1); }
}

/* Header
   ========================================================================== */
.c-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 20;
    height: var(--header-h);
    padding: 0 var(--margin);
    display: flex;
    align-items: center;
    gap: clamp(2rem, 6vw, 7.5rem);
    font-size: clamp(20px, 1.85vw, 36px);
    letter-spacing: -.02em;
}
.c-header_logo sup { font-size: .55em; vertical-align: .5em; margin-left: .05em; }
.c-header_icon { display: block; width: 1.6em; }
.c-header_icon svg { display: block; width: 100%; }
.c-header_cta { margin-left: auto; }

@media (max-width: 699px) {
    .c-header { font-size: 20px; gap: 1.2rem; }
    .c-header_icon { display: none; }
}

/* Character canvas
   ========================================================================== */
.c-visualizer {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* Conversation
   ========================================================================== */
.c-agent { position: fixed; inset: 0; z-index: 5; pointer-events: none; }

.c-agent_sheet {
    position: absolute;
    inset: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 0 var(--margin) 8rem;
    scrollbar-width: none;
}
.c-agent_sheet::-webkit-scrollbar { display: none; }

.c-agent_step {
    pointer-events: auto;
    width: min(31rem, 30vw);
    min-width: 22rem;
    padding-top: 37vh;
    transition: padding-top .6s var(--ease);
}
.c-agent.is-compact .c-agent_step { padding-top: 46vh; }

@media (max-width: 899px) {
    .c-agent_step, .c-agent.is-compact .c-agent_step { width: auto; min-width: 0; padding-top: 52vh; }

    /* fade the bust out under the text */
    .c-agent::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(to bottom, transparent 38%, var(--fade) 50%);
    }
}

/* Ghost of the previous line (click = back) */
.c-agent_previous {
    margin: 0 0 2.6rem;
    font-size: calc(var(--dialog-size) * .82);
    line-height: 1.12;
    letter-spacing: -.02em;
    filter: blur(4px);
    opacity: .7;
    cursor: pointer;
    user-select: none;
    transition: filter var(--speed) var(--ease), opacity var(--speed) var(--ease);
}
.c-agent_previous:empty { display: none; }
.c-agent_previous:hover { filter: blur(3px); }

.c-agent_dialog {
    margin: 0;
    font-weight: 400;
    font-size: var(--dialog-size);
    line-height: 1.1;
    letter-spacing: -.025em;
    transform-origin: top left;
    transition: transform var(--speed) var(--ease), filter var(--speed) var(--ease), opacity var(--speed) var(--ease);
}
.c-agent_dialog em { font-style: normal; }
.c-agent_dialog .w { display: inline-block; white-space: nowrap; }
.c-agent_dialog .ch { display: inline-block; }
.c-agent_dialog .ch.is-block { background: var(--ink); color: transparent; }

/* Block cursor */
.c-agent_dialog.has-cursor::after {
    content: "";
    display: inline-block;
    width: .4em;
    height: .5em;
    margin-left: .25em;
    transform: scaleY(1.75) translateY(5%);
    transform-origin: bottom center;
    background: var(--ink);
    animation: cursor 1s linear infinite;
}
@keyframes cursor { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

.c-agent.is-leaving .c-agent_dialog { transform: translate3d(0, calc(-100% - 2.6rem), 0) scale(.8); filter: blur(4px); opacity: .7; }
.c-agent.is-leaving .c-agent_previous { transform: translate3d(0, -100%, 0) scale(.5); opacity: 0; transition: transform var(--speed) var(--ease), opacity var(--speed) var(--ease); }
.c-agent.is-leaving .c-agent_content { opacity: 0; }

.c-agent_content {
    margin-top: 1.6rem;
    opacity: 0;
    transform: translate3d(0, 1.3rem, 0);
    pointer-events: none;
    transition: opacity var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.c-agent_content:empty { display: none; }
.c-agent.is-expanded .c-agent_content { opacity: 1; transform: none; pointer-events: auto; transition-delay: .1s; }

/* Choices — white pills */
.c-choices { display: flex; flex-wrap: wrap; gap: .5rem .4rem; }

.c-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 1em;
    padding: .75em 1.65em;
    border-radius: 999px;
    font-size: 1rem;
    letter-spacing: -.01em;
    background: var(--btn-bg);
    color: var(--btn-fg);
    border: 1px solid var(--btn-bg);
    overflow: hidden;
    transition: background-color var(--speed) var(--ease), color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.c-button:hover { background: var(--btn-hover-bg); color: var(--btn-hover-fg); border-color: var(--btn-hover-bg); }
.c-button.-secondary { background: transparent; color: var(--btn2-fg); border-color: var(--btn2-line); }
.c-button.-secondary:hover { background: var(--btn-bg); color: var(--btn-fg); border-color: var(--btn-bg); }
.c-button .u { text-decoration: underline; text-underline-offset: .15em; }
.c-button svg { width: 1em; height: 1em; }

/* Inputs */
.c-form { display: grid; gap: 1.6rem; }
.c-field { position: relative; }
.c-field input, .c-field textarea {
    display: block;
    width: 100%;
    padding: .6rem 0;
    background: transparent;
    border: 0;
    border-bottom: 1px solid var(--ink);
    border-radius: 0;
    outline: 0;
    font-size: 1.15rem;
}
.c-field textarea { min-height: 6.5rem; resize: vertical; }
.c-field input::placeholder, .c-field textarea::placeholder { color: transparent; }
.c-field label {
    position: absolute;
    left: 0; top: .6rem;
    color: var(--muted);
    font-size: 1.15rem;
    pointer-events: none;
    transform-origin: top left;
    transition: transform var(--speed) var(--ease);
}
.c-field input:focus ~ label, .c-field input:not(:placeholder-shown) ~ label,
.c-field textarea:focus ~ label, .c-field textarea:not(:placeholder-shown) ~ label {
    transform: scale(.75) translateY(-1.5em);
}
.c-field.is-invalid input, .c-field.is-invalid textarea { border-color: var(--invalid); }
.c-field_error { margin: .4rem 0 0; font-size: .8rem; color: var(--invalid); }

.c-form_footer { display: flex; justify-content: flex-end; }
.c-next { width: 3rem; height: 3rem; padding: 0; justify-content: center; font-size: 1.1rem; background: var(--ink); color: var(--paper); border-color: var(--ink); }
.c-next:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

/* Checkbox pills */
.c-checks { display: flex; flex-wrap: wrap; gap: .5rem .4rem; border: 0; padding: 0; margin: 0; }
.c-checks legend { position: absolute; clip: rect(0 0 0 0); width: 1px; height: 1px; overflow: hidden; }
.c-check input { position: absolute; opacity: 0; pointer-events: none; }
.c-check span {
    display: inline-flex; align-items: center; gap: .75em;
    padding: .7em 1em .7em 1.5em;
    border: 1px solid var(--ink);
    border-radius: 999px;
    cursor: pointer;
    transition: background-color var(--speed) var(--ease), color var(--speed) var(--ease);
}
.c-check span::after {
    content: "";
    width: 1.3em; height: 1.3em;
    border-radius: 50%;
    border: 1px solid currentColor;
}
.c-check span:hover { background: var(--btn-bg); color: var(--btn-fg); border-color: var(--btn-bg); }
.c-check input:checked + span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.c-check input:checked + span::after { background: var(--paper); }
.c-check input:focus-visible + span { outline: 1px solid var(--ink); outline-offset: 3px; }

/* Agent detail */
.c-detail {
    margin: 0 0 1.4rem;
    font-size: 1.05rem;
    line-height: 1.5;
    color: var(--detail);
}
.c-detail strong { color: var(--ink); font-weight: 500; }

.c-loading {
    width: 2em; height: 2em;
    border: 2px solid transparent;
    border-top-color: var(--ink);
    border-radius: 50%;
    animation: spin .3s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Progress / back / sound / toast
   ========================================================================== */
.c-progress {
    position: fixed;
    left: 0; bottom: 0;
    width: 100%;
    z-index: 10;
    border-top: 4px solid var(--ink);
    transform: scaleX(var(--progress, 0));
    transform-origin: left;
    transition: transform .3s var(--ease);
}

.c-back {
    position: fixed;
    left: var(--margin);
    bottom: var(--margin);
    z-index: 10;
    width: 2.8rem; height: 2.8rem;
    display: grid; place-items: center;
    border-radius: 50%;
    background: var(--ink);
    color: var(--paper);
    opacity: 0;
    transform: scale(.8);
    pointer-events: none;
    transition: opacity var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.c-back svg { width: 50%; height: 50%; }
html.can-go-back .c-back { opacity: 1; transform: none; pointer-events: auto; }

.c-sound {
    position: fixed;
    right: var(--margin);
    bottom: var(--margin);
    z-index: 10;
    display: flex;
    flex-direction: column;
    background: var(--ink);
    border-radius: 2.8rem;
}
.c-sound::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 2.8rem; height: 2.8rem;
    border-radius: 50%;
    border: 3px solid var(--ink);
    background: var(--paper);
    transition: transform var(--speed) var(--ease);
}
.c-sound.is-muted::before { transform: translateY(100%); }
.c-sound_icon { position: relative; z-index: 1; display: grid; place-items: center; width: 2.8rem; height: 2.8rem; }
.c-sound_icon svg { width: 40%; height: 40%; transition: color var(--speed) var(--ease); }
.c-sound_icon.-on { color: var(--ink); }
.c-sound_icon.-off { color: var(--paper); }
.c-sound.is-muted .c-sound_icon.-on { color: var(--paper); }
.c-sound.is-muted .c-sound_icon.-off { color: var(--ink); }

.c-toast {
    position: fixed;
    left: 50%; bottom: calc(var(--margin) + .4rem);
    z-index: 30;
    padding: .7em 1.4em;
    border-radius: 999px;
    background: var(--ink);
    color: var(--paper);
    font-size: .87rem;
    transform: translate(-50%, 1rem);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.c-toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}