:root {
    --nibi-navy: #0D1321;
    --nibi-teal: #00B4DB;
    --nibi-blue: #2563EB;
    --nibi-purple: #6D28D9;
    --brand-primary: var(--nibi-blue);
    --brand-secondary: var(--nibi-teal);
    --brand-accent: var(--nibi-purple);
    --radius-small: 6px;
    --radius-medium: 10px;
    --radius-large: 16px;
    --radius-xl: 24px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --shadow-small: 0 2px 8px rgba(13, 19, 33, 0.08);
    --shadow-large: 0 20px 50px rgba(13, 19, 33, 0.16);
}
.brand-logo-mark { width: 56px; height: 56px; flex: 0 0 auto; object-fit: contain; }
.app-header h1 { letter-spacing: 0.06em; }
.tagline { background: linear-gradient(90deg, var(--nibi-teal), var(--nibi-blue), var(--nibi-purple)); -webkit-background-clip: text; background-clip: text; color: transparent; }
@media (max-width: 580px) { .brand-logo-mark { width: 48px; height: 48px; } }

/* Presenter join experience */
.join-experience {
    margin: 24px 0;
    padding: clamp(22px, 4vw, 34px);
    text-align: center;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-small);
}

.join-brand-logo {
    display: block;
    width: min(190px, 56%);
    max-height: 64px;
    margin: 0 auto 14px;
    object-fit: contain;
}

.join-heading {
    margin: 0 0 20px;
    color: var(--nibi-navy);
    font-size: clamp(1.45rem, 4vw, 2rem);
    line-height: 1.2;
}

.join-experience .qr-code {
    width: min(100%, 320px);
    margin: 0 auto 18px;
}

.join-primary-instruction,
.join-alternative,
.join-tagline {
    max-width: 38rem;
    margin-left: auto;
    margin-right: auto;
}

.join-primary-instruction {
    margin-top: 0;
    margin-bottom: 18px;
    color: var(--text);
    font-size: 1rem;
    line-height: 1.55;
}

.join-primary-instruction strong {
    display: block;
    color: var(--text-muted);
    font-weight: 700;
}

.join-alternative {
    margin-bottom: 6px;
    color: var(--text-muted);
}

.join-experience .join-link {
    display: inline-block;
    max-width: 100%;
    padding: 8px 12px;
    color: var(--brand-primary);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: clamp(0.92rem, 2.7vw, 1.12rem);
    font-weight: 800;
    line-height: 1.45;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    overflow-wrap: anywhere;
}

.join-tagline {
    margin-top: 22px;
    margin-bottom: 0;
    color: var(--text-muted);
    font-size: 0.94rem;
    font-weight: 700;
}

.join-session-details {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 14px;
    margin-bottom: 18px;
}

.join-session-details .session-code-card,
.join-session-details .viewer-count {
    margin: 0;
    min-height: 100%;
}

.join-session-details .viewer-count {
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 6px;
}

.join-session-details .viewer-count strong {
    color: var(--brand-primary);
}

@media (max-width: 580px) {
    .join-experience {
        padding: 20px 16px;
    }

    .join-experience .qr-code {
        width: min(100%, 290px);
    }

    .join-session-details {
        grid-template-columns: 1fr;
    }
}


/* P2.1 responsive join-card refinements */
.join-experience .join-link {
    display: block;
    width: fit-content;
    max-width: 100%;
    margin: 0 auto;
    padding: 8px 4px;
    font-size: clamp(0.78rem, 2.1vw, 1.05rem);
    line-height: 1.35;
    text-decoration: none;
    white-space: nowrap;
}

.join-display-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    margin-top: 18px;
    padding: 10px 16px;
    border: 1px solid var(--brand-primary);
    border-radius: var(--radius-medium);
    color: var(--brand-primary);
    font-weight: 800;
    text-decoration: none;
}

.join-display-button:hover,
.join-display-button:focus-visible {
    background: color-mix(in srgb, var(--brand-primary) 8%, white);
}

.join-session-details .session-code-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
}

.join-session-details .session-code-card strong {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 180px;
    max-width: 100%;
    padding: 12px 20px;
    margin: 0 auto;
    border-radius: var(--radius-medium);
    background: color-mix(in srgb, var(--brand-primary) 8%, white);
    color: var(--brand-primary);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: 0.08em;
    white-space: nowrap;
    overflow: hidden;
    text-align: center;
}

@media (max-width: 760px) {
    .join-session-details {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .join-experience .join-link {
        font-size: clamp(0.72rem, 3.5vw, 0.92rem);
    }
}

/* ============================================================
   NIBI Phase 1 approved logo treatment
   The logo artwork already contains the NIBI wordmark.
   Do not add a second text version of the brand name beside it.
   ============================================================ */

.brand-lockup img,
.brand-header img,
.presenter-brand img,
.audience-brand img,
.audience-language-brand img {
    display: block;
    width: auto;
    height: clamp(3rem, 5vw, 4.5rem);
    max-width: min(18rem, 72vw);
    object-fit: contain;
    object-position: left center;
}

.audience-language-brand img {
    margin-inline: auto;
    object-position: center;
}

@media (max-width: 600px) {
    .brand-lockup img,
    .brand-header img,
    .presenter-brand img,
    .audience-brand img,
    .audience-language-brand img {
        height: 3.25rem;
        max-width: 70vw;
    }
}

/* Phase 1 logo-only header treatment */

.app-header > .brand-logo-mark,
.audience-language-picker-brand .brand-logo-mark {
    display: block;
    width: auto;
    height: clamp(3.25rem, 5vw, 4.75rem);
    max-width: min(19rem, 72vw);
    object-fit: contain;
}

.audience-language-picker-brand {
    display: flex;
    justify-content: center;
    align-items: center;
}

.audience-language-picker-brand .brand-logo-mark {
    margin-inline: auto;
}

.app-header {
    align-items: center;
    gap: 1rem;
}

.app-header > div {
    min-width: 0;
}

.app-header .tagline {
    margin-top: 0;
}

@media (max-width: 600px) {
    .app-header > .brand-logo-mark,
    .audience-language-picker-brand .brand-logo-mark {
        height: 3.5rem;
        max-width: 78vw;
    }
}

/* Phase 1 language-picker logo sizing.
   Keep mobile compact, increase desktop presence. */

@media (min-width: 768px) {
    .audience-language-picker-brand .brand-logo-mark {
        height: 5.75rem;
        max-width: 22rem;
    }
}

@media (max-width: 767px) {
    .audience-language-picker-brand .brand-logo-mark {
        height: 3.5rem;
        max-width: 78vw;
    }
}

/* Phase 1 language chooser branding.
   Intentionally larger on tablet/desktop. */
@media (min-width: 768px) {
    .audience-language-picker .audience-language-picker-brand img.brand-logo-mark {
        width: 180px;
        height: auto;
        max-width: none;
        max-height: none;
        margin: 0 auto;
    }
}