:root {
    color-scheme: dark;
    font-family: "Titillium Web", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-weight: 200;
    --grad-blue: #3da1ff;
    --grad-pink: #f249d9;
    --grad-purple: #9f39ff;
    --ease-flow: cubic-bezier(.22, 1, .36, 1);

    --nexo-orange: #ff6600;
    --nexo-graphite: #252525;
    --nexo-graphite-soft: #414141;
    --nexo-paper: #fcfefe;
    --color-background: #f5f5f5;
    --color-font: #343a40;
    --color-accent: var(--nexo-orange);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-width: 320px;
    min-height: 100vh;
    overflow: hidden;
    background: var(--nexo-graphite);
    color: var(--nexo-paper);
}

button {
    font: inherit;
    cursor: pointer;
}

.stage {
    position: relative;
    isolation: isolate;
    height: 100svh;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 78% 16%, rgba(255,102,0,.18) 0, transparent 28%),
        radial-gradient(ellipse at 18% 82%, rgba(252,254,254,.07) 0, transparent 32%),
        linear-gradient(145deg, #303030 0%, #252525 48%, #171717 100%);
}

#persona-video {
    position: absolute;
    z-index: -2;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 25%;
    opacity: 0;
    transition: opacity .7s ease;
}

.stage.connected #persona-video {
    opacity: 1;
}

.backdrop {
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(ellipse at 76% 58%, rgba(255,102,0,.12) 0, transparent 28%),
        linear-gradient(180deg, rgba(37,37,37,.08) 0%, rgba(37,37,37,.18) 45%, rgba(18,18,18,.62) 100%);
    transition: background .5s ease;
}

.stage.connected .backdrop {
    background: linear-gradient(180deg, rgba(4,7,23,.55) 0%, transparent 25%, transparent 60%, rgba(4,7,23,.76) 100%);
}

/* --- Topbar --- */
.topbar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 28px clamp(20px, 4vw, 58px);
    transition: opacity .4s ease, transform .4s ease;
}

.brand {
    font-size: 16px;
    font-weight: 720;
    letter-spacing: -.02em;
    display: flex;
    gap: 7px;
    align-items: center;
}

.brand span:last-child {
    color: #d8cef3;
    font-weight: 450;
}

.brand-icon {
    width: 87px;
    height: 20px;
    flex-shrink: 0;
}

/* --- Status chip --- */
.status {
    display: none;
    gap: 9px;
    align-items: center;
    padding: 8px 12px;
    border: 1px solid rgba(213,190,255,.2);
    border-radius: 999px;
    background: rgba(19,10,64,.4);
    backdrop-filter: blur(12px);
    font-size: 13px;
}

.status[data-state="connecting"],
.status[data-state="connected"],
.status[data-state="error"] {
    display: flex;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #a8a5c3;
    flex: 0 0 auto;
}

.status-loader {
    display: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    flex: 0 0 auto;
    background: conic-gradient(from 0deg, var(--grad-blue), var(--grad-purple), var(--grad-pink), var(--grad-blue));
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2.4px), #000 calc(100% - 2.4px));
    mask: radial-gradient(farthest-side, transparent calc(100% - 2.4px), #000 calc(100% - 2.4px));
    animation: spin .85s linear infinite;
}

.status[data-state="connecting"] .status-dot {
    display: none;
}

.status[data-state="connecting"] .status-loader {
    display: block;
}

.status[data-state="connected"] .status-dot {
    background: #74e1ff;
    box-shadow: 0 0 10px #74e1ff;
}

.status[data-state="error"] .status-dot {
    background: #ff6e9f;
}

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

/* --- Hero panel --- */
.hero {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 24px;
}

.hero-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    width: min(980px, 100%);
    text-align: center;
    display: grid;
    justify-items: center;
    gap: 0;
    transform: translate(-50%, -50%);
    transition: opacity .4s, transform .4s;
}

.stage.connected .hero-panel {
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, calc(-50% - 16px));
}

/* --- Embedded login state --- */
.stage.auth-mode .message-rotator,
.stage.auth-mode #login-button {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-12px);
}

.stage.auth-mode .hero-render-icon {
    opacity: 0;
    visibility: hidden;
}

.message-rotator,
#login-button {
    transition: opacity .4s ease, transform .4s ease, visibility .4s ease;
}

.stage.auth-mode .topbar {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
}

.stage.auth-mode .hero-panel {
    position: fixed;
    display: flex;
    width: 100%;
    height: auto;
    min-height: 0;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    align-items: center;
    justify-content: center;
}

.stage.auth-mode .message-rotator {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    width: min(980px, 100%);
    height: max-content;
    margin: -170px auto 0;
}

.login-panel { position: fixed; top: 50%; left: 50%; width: min(430px, 100%); text-align: center; opacity: 0; visibility: hidden; pointer-events: none; transform: translate(-50%, calc(-50% + 12px)); transition: opacity .4s ease, transform .4s ease, visibility .4s ease; }
.stage.auth-mode .login-panel { opacity: 1; visibility: visible; pointer-events: auto; transform: translate(-50%, -50%); }
.stage.auth-success .hero-panel { opacity: 0; transform: translate(-50%, calc(-50% - 12px)); pointer-events: none; }
.page { opacity: 0; transition: opacity 600ms ease; }
.page.fade-in { display: block !important; opacity: 1; }
.page.fade-out { opacity: 0; }
.page-loader { display: block; width: 100%; height: 100%; position: fixed; inset: 0; z-index: 1000; overflow: auto; background: var(--color-background); animation: loader-gradient 15s ease infinite; background-size: 400% 400%; background-attachment: fixed; opacity: 1; visibility: visible; transition: opacity 666ms ease, visibility 666ms ease; }
.page-loader.fade-out { opacity: 0; pointer-events: none; visibility: hidden; }
.loader-text { position: absolute; top: 50%; left: 0; right: 0; margin: 50px 0 0; height: 30px; text-align: center; font-size: 10px; letter-spacing: 3px; color: var(--color-font); }
.loader-animation { position: absolute; top: 50%; left: 50%; width: 60px; height: 60px; border-radius: 50%; margin: -30px 0 0 -30px; }
.loader-animation svg { width: 60px; height: 60px; display: block; }
.loader-animation svg .st1 { stroke: var(--color-accent); fill: #fff; stroke-width: 0; }
.loader-animation svg .st2 { fill: var(--color-accent); }
.loader-animation svg .st3 { fill: var(--color-accent); opacity: .75; }
.loader-animation svg .st4 { fill: var(--color-accent); opacity: .5; }
.loader-donut { position: absolute; top: 50%; left: 50%; width: 66px; height: 66px; border: 2px solid rgba(0,0,0,.1); border-left-color: var(--color-accent); border-radius: 50%; margin: -33px 3rem 2rem -33px; animation: donut-spin 2s linear infinite; }
@keyframes donut-spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
@keyframes loader-gradient { 0%, 100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
.login-form { width: min(350px, 100%); margin: 0 auto; color: #343a40; }
.login-form-logo { display: block; width: 350px; height: auto; margin: 0 auto 28px; }
.login-form label { display: block; margin: 0 0 7px; color: #68717a; font-size: 12px; letter-spacing: 2px; text-align: left; text-transform: uppercase; }
.login-form input { width: 100%; height: 44px; padding: 8px 12px; border: 1px solid #dee2e6; border-radius: 6px; background: #fff; color: #343a40; font: inherit; font-size: 16px; outline: none; }
.login-form input:focus { border-color: var(--nexo-orange); box-shadow: 0 0 0 2px rgba(255,102,0,.22); }
.login-otp-section { margin-top: 16px; }
.login-otp-grid { display: flex; justify-content: space-between; gap: 7px; }
.login-otp-grid input { width: 46px; height: 50px; padding: 0; text-align: center; font-size: 22px; }
.login-message { min-height: 22px; margin: 16px 0 5px; color: #343a40; font-size: 13px; letter-spacing: .5px; }
.login-message.error { color: #ff9b86; }
.login-submit { width: 100%; height: 45px; margin-top: 7px; border: 1px solid var(--nexo-orange); border-radius: 6px; background: var(--nexo-orange); color: #fff; font: inherit; font-size: 15px; letter-spacing: 1px; text-transform: uppercase; display: inline-flex; align-items: center; justify-content: center; }
.login-submit:hover { background: #ff8533; border-color: #ff8533; }
.login-submit:disabled { opacity: .65; cursor: wait; }
.login-submit .processing-content { display: none; align-items: center; gap: 10px; }
.login-submit.processing .default-text { display: none; }
.login-submit.processing .processing-content { display: inline-flex; }
.login-submit .spinner { width: 18px; height: 18px; border: 2px solid rgba(255,255,255,.3); border-top-color: #fff; border-radius: 50%; animation: spin .6s linear infinite; }
.login-back { display: inline-flex; align-items: center; justify-content: center; gap: 7px; width: auto; height: 32px; margin-top: 13px; padding: 0; border: 0; background: transparent; color: #68717a; cursor: pointer; opacity: .72; font: inherit; font-size: 12px; letter-spacing: .4px; transition: color .2s ease, opacity .2s ease, transform .2s ease; }
.login-back svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.login-back:hover { color: #343a40; opacity: 1; transform: translateX(-2px); }

.stage.connected .transcript-panel {
    bottom: 30px;
}

/* --- Message rotator --- */
.message-rotator {
    margin-top: 8px;
    width: min(860px, 100%);
    height: 340px;
    position: relative;
}

.hero-render-icon {
    position: absolute;
    top: -168px;
    left: 50%;
    width: 150px;
    height: 150px;
    transform: translateX(-50%);
    object-fit: contain;
    pointer-events: none;
    transition: opacity .4s ease, visibility .4s ease;
}

.message-slide {
    position: absolute;
    inset: 0;
    padding: 28px 28px 30px;
    display: grid;
    grid-template-rows: auto auto 1fr;
    justify-items: center;
    align-content: center;
    text-align: center;
    gap: 0;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 1s cubic-bezier(.4,0,.2,1), transform 1s cubic-bezier(.4,0,.2,1);
    pointer-events: none;
    will-change: opacity, transform;
}

.message-slide.is-active {
    opacity: 1;
    transform: translateY(0);
}

.message-slide.is-leaving {
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity .8s cubic-bezier(.4,0,.2,1), transform .8s cubic-bezier(.4,0,.2,1);
}

.message-kicker {
    margin: 0 0 10px;
    color: #8fdcff;
    font-size: 11px;
    font-weight: 200;
    letter-spacing: .16em;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.message-kicker::before {
    content: "";
    width: 14px;
    height: 1px;
    background: linear-gradient(90deg, transparent, #8fdcff);
}

.message-kicker::after {
    content: "";
    width: 14px;
    height: 1px;
    background: linear-gradient(90deg, #8fdcff, transparent);
}

.message-slide h2 {
    margin: 0 0 12px;
    max-width: 760px;
    font-size: clamp(40px, 6.2vw, 84px);
    line-height: .98;
    letter-spacing: -.06em;
    text-shadow: 0 8px 36px rgba(53,15,121,.5);
}

.hero-inline-logo {
    display: inline-block;
    width: clamp(120px, 16vw, 190px);
    height: auto;
    vertical-align: middle;
    margin: 0 .08em .12em;
}

.hero-inline-logo--small {
    width: 92px;
    margin: 0 .15em .08em 0;
}

.message-slide p {
    margin: 0;
    max-width: 680px;
    color: #ddd4f1;
    font-size: clamp(16px, 2vw, 20px);
    line-height: 1.6;
}

.rotator-dots {
    position: absolute;
    left: 50%;
    bottom: 16px;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 3;
}

.rotator-dot {
    width: 8px;
    height: 8px;
    border: 0;
    border-radius: 50%;
    padding: 0;
    background: rgba(255,255,255,.22);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.08);
    transition: background .3s, box-shadow .3s, transform .3s var(--ease-flow);
}

.rotator-dot.is-active {
    background: #8fdcff;
    box-shadow: 0 0 10px rgba(116,225,255,.65);
    transform: scale(1.2);
}

/* --- Buttons --- */
.primary-button {
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 999px;
    color: white;
    background: linear-gradient(135deg, rgba(43, 32, 112, .24), rgba(7, 6, 32, .12));

    font-weight: 700;
    padding: 14px 21px;
    box-shadow: 0 12px 32px rgba(165,54,218,.38);
    transition: transform .15s, filter .15s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

#start-button.primary-button {
    margin-top: 28px;
}

#login-button.primary-button {
    width: min(350px, 100%);
    height: 45px;
    margin-top: 28px;
    padding: 12px;
    border: 1px solid var(--nexo-orange);
    border-radius: 6px;
    background: var(--nexo-orange);
    color: #fff;
    box-shadow: none;
    font-family: inherit;
    font-weight: 200;
    font-size: 15px;
    letter-spacing: 1px;
    justify-content: center;
    text-transform: uppercase;
    text-decoration: none;
}

#login-button.primary-button:hover {
    border-color: #ff8533;
    background: #ff8533;
    filter: none;
    text-decoration: none;
}

.primary-button:hover {
    background: linear-gradient(105deg, #6d64ff, #d343d6);
    filter: brightness(1.13);
}

.primary-button:disabled {
    opacity: .85;
    cursor: wait;
}

.button-loader {
    display: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,.35);
    border-top-color: #fff;
    animation: spin .7s linear infinite;
}

.primary-button[data-loading="true"] .button-loader {
    display: inline-block;
}

.primary-button[data-loading="true"] .button-icon {
    display: none;
}

.button-icon {
    font-size: 12px;
}

/* --- Transcript --- */
.transcript-panel {
    position: absolute;
    left: 50%;
    bottom: 110px;
    transform: translateX(-50%);
    width: min(530px, calc(100vw - 40px));
    padding: 16px 18px;
    border-radius: 14px;
    background: rgba(0,0,0,.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,.04);
    box-shadow: 0 4px 24px rgba(0,0,0,.5);
    z-index: 20;
}

.transcript-label {
    margin: 0 0 7px;
    color: #9edaff;
    font-size: 10px;
    letter-spacing: .16em;
    font-weight: 800;
}

.transcript-text {
    margin: 0;
    font-size: 16px;
    line-height: 1.45;
    text-wrap: balance;
}

.transcript-close {
    position: absolute;
    top: 10px;
    right: 12px;
    background: none;
    border: none;
    color: rgba(255,255,255,.45);
    font-size: 20px;
    cursor: pointer;
    padding: 4px 6px;
    line-height: 1;
    border-radius: 6px;
    transition: color .2s, background .2s;
}

.transcript-close:hover {
    color: #fff;
    background: rgba(255,255,255,.1);
}

.transcript-show-btn {
    position: absolute;
    left: 50%;
    bottom: 30px;
    transform: translateX(-50%);
    z-index: 20;
    background: rgba(0,0,0,.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 50%;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,.6);
    cursor: pointer;
    transition: color .2s, background .2s, transform .2s;
}

.transcript-show-btn:hover {
    color: #fff;
    background: rgba(0,0,0,.8);
    transform: translateX(-50%) scale(1.1);
}

.transcript-show-btn[hidden] {
    display: none;
}

/* --- Footer --- */
.page-footer {
    position: absolute;
    right: clamp(20px, 4vw, 58px);
    bottom: 5px;
    left: clamp(20px, 4vw, 58px);
    z-index: 20;
    text-align: center;
}

.footer-copyright {
    font-size: 13px;
    font-weight: 300;
    letter-spacing: .04em;
    color: rgba(223,226,255,.6);
    text-decoration: none;
}

.footer-copyright:hover {
    color: white;
}

.stage.connected .page-footer {
    opacity: 0;
    pointer-events: none;
}

/* --- Nexo visual field --- */
#canvas-container {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: transparent;
    opacity: .85;
    z-index: -3;
    pointer-events: none;
}

/* --- Controls --- */
.topbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.end-button {
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 999px;
    color: white;
    background: #c94134;
    font-weight: 700;
    padding: 8px 16px;
    font-size: 13px;
    box-shadow: 0 8px 22px rgba(176,45,35,.3);
    transition: background .15s;
}

.end-button:not(:disabled):hover {
    background: #df5547;
}

.end-button:disabled {
    opacity: 0;
    pointer-events: none;
}

.end-button[hidden] {
    display: none;
}

/* --- Toast --- */
.toast {
    position: absolute;
    left: 50%;
    bottom: 105px;
    transform: translateX(-50%);
    width: min(420px, calc(100vw - 40px));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    padding: 14px 16px;
    border-radius: 12px;
    color: #ffe9eb;
    background: rgba(91,25,35,.92);
    border: 1px solid rgba(255,144,154,.33);
    z-index: 30;
}

.toast button {
    flex: 0 0 auto;
    background: transparent;
    border: 1px solid rgba(255,255,255,.3);
    border-radius: 8px;
    color: white;
    padding: 6px 9px;
}

.transcript-panel[hidden],
.toast[hidden] {
    display: none;
}

/* --- Responsive --- */
@media (max-width: 560px) {
    .topbar { padding: 20px; }
    .brand { font-size: 14px; }
    .status { font-size: 11px; }

    .status #status-label {
        max-width: 115px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .hero {
        padding: 0 16px;
    }

    .message-slide--hero h2,
    .message-slide h2 {
        font-size: clamp(34px, 10vw, 54px);
    }

    .message-slide--hero p,
    .message-slide p {
        max-width: 340px;
        width: 100%;
        font-size: 15px;
        line-height: 1.55;
    }

    .message-rotator {
        height: 300px;
        margin-top: 20px;
    }

    .message-slide {
        padding: 24px 18px 32px;
    }

    .transcript-panel { bottom: 112px; }
    .transcript-text { font-size: 14px; }
    .page-footer { bottom: 20px; }
}

@media (min-width: 1600px) {
    .message-rotator {
        height: 380px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .message-slide,
    .message-slide.is-leaving,
    #persona-video,
    .hero-panel,
    .backdrop,
    .status-loader,
    .button-loader {
        transition: none;
        animation: none;
    }
}

/* --- Nexo corporate light theme --- */
:root {
    color-scheme: light;
    --nexo-orange: #ff6600;
    --nexo-graphite: #252525;
    --nexo-paper: #fcfefe;
    --nexo-line: rgba(37,37,37,.14);
}

html, body {
    background: var(--nexo-paper);
    color: var(--nexo-graphite);
}

.stage {
    background: #ffffff;
}

.backdrop {
    background: #ffffff;
}

.stage.connected .backdrop {
    background: #ffffff;
}

.brand span:last-child,
.message-slide h2 {
    color: var(--nexo-graphite-soft);
}

.status {
    border-color: var(--nexo-line);
    background: rgba(255,255,255,.72);
    color: var(--nexo-graphite);
}

.status-dot {
    background: rgba(37,37,37,.45);
}

.status[data-state="connected"] .status-dot {
    background: var(--nexo-orange);
    box-shadow: 0 0 10px rgba(255,102,0,.35);
}

.message-kicker,
.transcript-label {
    color: var(--nexo-orange);
}

.message-kicker::before {
    background: linear-gradient(90deg, transparent, var(--nexo-orange));
}

.message-kicker::after {
    background: linear-gradient(90deg, var(--nexo-orange), transparent);
}

.message-slide h2 {
    text-shadow: none;
}

.message-slide p {
    color: rgba(37,37,37,.72);
}

.rotator-dot {
    background: rgba(37,37,37,.18);
    box-shadow: inset 0 0 0 1px rgba(37,37,37,.08);
}

.rotator-dot.is-active {
    background: var(--nexo-orange);
    box-shadow: 0 0 10px rgba(255,102,0,.35);
}

.primary-button {
    border-color: var(--nexo-orange);
    color: var(--nexo-paper);
    background: var(--nexo-orange);
    box-shadow: 0 12px 32px rgba(255,102,0,.22);
}

.primary-button:hover {
    background: var(--nexo-graphite);
}

.transcript-panel {
    background: rgba(255,255,255,.88);
    border-color: var(--nexo-line);
    color: var(--nexo-graphite);
    box-shadow: 0 4px 24px rgba(37,37,37,.14);
}

.transcript-close {
    color: rgba(37,37,37,.45);
}

.transcript-close:hover {
    color: var(--nexo-graphite);
    background: rgba(37,37,37,.08);
}

.transcript-show-btn {
    background: rgba(255,255,255,.86);
    border-color: var(--nexo-line);
    color: rgba(37,37,37,.6);
}

.transcript-show-btn:hover {
    color: var(--nexo-graphite);
    background: #ffffff;
}

.footer-copyright {
    color: rgba(37,37,37,.6);
}

.footer-copyright:hover {
    color: var(--nexo-orange);
}

#canvas-container {
    background: transparent;
    opacity: .9;
}