/* B2 Speaking Part 1 — Sprint 1 visual foundation.
 * Presentation only: existing DOM hooks and interaction behavior remain intact.
 */

:root {
    --ov-ink-900: #10233f;
    --ov-ink-700: #344966;
    --ov-blue-700: #164ea6;
    --ov-blue-600: #1f63d8;
    --ov-blue-100: #eaf2ff;
    --ov-yellow-500: #f4c542;
    --ov-green-700: #16724a;
    --ov-green-100: #e8f6ef;
    --ov-neutral-50: #f7f9fc;
    --ov-neutral-100: #eef3f8;
    --ov-neutral-200: #dce3ec;
    --ov-white: #ffffff;
    --ov-shadow-sm: 0 1px 2px rgba(16, 35, 63, 0.06);
    --ov-shadow-md: 0 12px 32px rgba(16, 35, 63, 0.1);
    --ov-radius-sm: 10px;
    --ov-radius-md: 16px;
    --ov-radius-lg: 24px;
    --ov-space-1: 8px;
    --ov-space-2: 16px;
    --ov-space-3: 24px;
    --ov-space-4: 32px;
}

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

html {
    max-width: 100%;
    overflow-x: clip;
    width: 100%;
}

body {
    align-items: stretch;
    background:
        radial-gradient(circle at 8% 0%, rgba(31, 99, 216, 0.08), transparent 32rem),
        var(--ov-neutral-50);
    color: var(--ov-ink-900);
    display: flex;
    flex-direction: column;
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
    margin: 0;
    min-height: 100vh;
    max-width: 100%;
    min-width: 0;
    overflow-x: clip;
    padding: 0;
    position: relative;
    transition: background-color 160ms ease, color 160ms ease;
    width: 100%;
}

img {
    max-width: 100%;
}

button,
a {
    font: inherit;
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--ov-yellow-500);
    outline-offset: 3px;
}

.header {
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--ov-neutral-200);
    color: var(--ov-ink-900);
    font-size: 1rem;
    padding: 0;
    text-align: left;
    width: 100%;
}

.header-inner,
.navbar-inner {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin: 0 auto;
    max-width: 1200px;
    width: 100%;
}

.header-inner {
    min-height: 64px;
    padding: var(--ov-space-1) var(--ov-space-3);
}

.brand {
    align-items: center;
    color: inherit;
    display: inline-flex;
    gap: 12px;
    min-width: 0;
    text-decoration: none;
}

.brand-mark {
    align-items: center;
    background: var(--ov-blue-700);
    border-radius: 12px;
    color: var(--ov-white);
    display: inline-flex;
    flex: 0 0 40px;
    font-size: 0.82rem;
    font-weight: 800;
    height: 40px;
    justify-content: center;
    letter-spacing: 0.04em;
}

.brand-copy {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    min-width: 0;
}

.brand-name {
    color: var(--ov-blue-700);
    font-size: 1.05rem;
    font-weight: 800;
}

.header-title {
    color: var(--ov-ink-700);
    font-size: 0.78rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.auth-buttons {
    align-items: center;
    display: flex;
    gap: var(--ov-space-1);
}

.welcome-text {
    color: var(--ov-ink-700);
    font-size: 0.875rem;
    font-weight: 600;
}

.auth-buttons .btn {
    align-items: center;
    border: 1px solid var(--ov-neutral-200);
    border-radius: var(--ov-radius-sm);
    color: var(--ov-blue-700);
    display: inline-flex;
    font-size: 0.875rem;
    font-weight: 700;
    justify-content: center;
    min-height: 40px;
    padding: 8px 14px;
    text-decoration: none;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.auth-buttons .btn:hover {
    background: var(--ov-blue-100);
    border-color: rgba(22, 78, 166, 0.28);
}

.auth-buttons .btn-warning,
.auth-buttons .btn-primary {
    background: var(--ov-blue-700);
    border-color: var(--ov-blue-700);
    color: var(--ov-white);
}

.auth-buttons .btn-warning:hover,
.auth-buttons .btn-primary:hover {
    background: #103f8b;
    border-color: #103f8b;
}

.navbar {
    background: var(--ov-white);
    border-bottom: 1px solid var(--ov-neutral-200);
    color: var(--ov-ink-700);
    font-size: 0.875rem;
    overflow: visible;
    padding: 0;
}

.navbar-inner {
    min-height: 48px;
    padding: 4px var(--ov-space-3);
}

.practice-links {
    align-items: center;
    display: flex;
    gap: 4px;
    min-width: 0;
}

.navbar a,
.disabled-link {
    border-radius: 8px;
    display: inline-flex;
    font-weight: 650;
    margin: 0;
    padding: 8px 12px;
    text-decoration: none;
    white-space: nowrap;
}

.navbar a {
    color: var(--ov-ink-700);
}

.navbar a:hover {
    background: var(--ov-blue-100);
    color: var(--ov-blue-700);
}

.disabled-link {
    color: #7b8798;
    cursor: not-allowed;
    text-decoration: none;
}

.color-toggle-button {
    background: var(--ov-white);
    border: 1px solid var(--ov-neutral-200);
    border-radius: 8px;
    color: var(--ov-ink-700);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 700;
    min-height: 36px;
    padding: 6px 12px;
    transition: background-color 160ms ease, border-color 160ms ease;
}

.color-toggle-button:hover {
    background: var(--ov-neutral-100);
    border-color: #c5cfdb;
}

.container.speaking-workspace {
    align-items: stretch;
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    flex-grow: 1;
    margin: 0 auto;
    max-width: 1200px;
    padding: var(--ov-space-4) var(--ov-space-3) var(--ov-space-3);
    width: 100%;
}

.workspace-heading {
    align-items: flex-end;
    display: flex;
    gap: var(--ov-space-3);
    justify-content: space-between;
    margin-bottom: var(--ov-space-2);
}

.workspace-heading h1 {
    color: var(--ov-ink-900);
    font-size: clamp(1.75rem, 3vw, 2.35rem);
    letter-spacing: -0.025em;
    line-height: 1.15;
    margin: 3px 0 var(--ov-space-1);
}

.eyebrow,
.section-label {
    color: var(--ov-blue-700);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    margin: 0;
    text-transform: uppercase;
}

.workspace-subtitle {
    color: var(--ov-ink-700);
    font-size: 1rem;
    margin: 0;
}

.practice-badge {
    background: var(--ov-blue-100);
    border: 1px solid rgba(22, 78, 166, 0.14);
    border-radius: 999px;
    color: var(--ov-blue-700);
    flex: 0 0 auto;
    font-size: 0.8125rem;
    font-weight: 750;
    padding: 7px 12px;
}

.conversation-panel {
    background: var(--ov-white);
    border: 1px solid var(--ov-neutral-200);
    border-radius: 18px;
    box-shadow: 0 4px 18px rgba(16, 35, 63, 0.07);
    display: flex;
    flex: 1;
    flex-direction: column;
    min-height: min(680px, max(420px, calc(100vh - 276px)));
    overflow: hidden;
}

.conversation-header {
    align-items: center;
    border-bottom: 1px solid var(--ov-neutral-200);
    display: flex;
    justify-content: space-between;
    padding: 12px var(--ov-space-3);
}

.conversation-header h2 {
    color: var(--ov-ink-900);
    font-size: 1.125rem;
    line-height: 1.3;
    margin: 2px 0 0;
}

.session-indicator {
    align-items: center;
    background: var(--ov-green-100);
    border-radius: 999px;
    color: var(--ov-green-700);
    display: inline-flex;
    font-size: 0.8125rem;
    font-weight: 750;
    gap: 7px;
    padding: 6px 10px;
}

.session-indicator > span {
    background: currentColor;
    border-radius: 50%;
    height: 7px;
    width: 7px;
}

.interaction-space {
    background: #f9fbfd;
    border: 0;
    border-radius: 0;
    color: var(--ov-ink-900);
    flex: 1 1 auto;
    margin: 0;
    min-height: min(340px, max(220px, calc(100vh - 480px)));
    overflow-y: auto;
    padding: var(--ov-space-3);
    scroll-behavior: smooth;
    width: 100%;
}

.conversation-panel:not(:has(.interaction-space > p.user)) {
    min-height: 0;
}

.interaction-space:not(:has(> p.user)) {
    flex: 0 0 auto;
    min-height: 0;
    padding: 18px var(--ov-space-3);
}

.ready-card {
    align-items: center;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    display: grid;
    gap: 20px;
    grid-template-columns: 118px minmax(0, 1fr);
    margin: 0 auto;
    max-width: 820px;
    padding: var(--ov-space-1) var(--ov-space-2);
}

.interaction-space:has(> p.user) .ready-card {
    display: none;
}

.hero-img {
    border-radius: var(--ov-radius-md);
    height: auto;
    margin: 0;
    max-width: 118px;
    width: 100%;
}

.ready-card-content h3 {
    color: var(--ov-ink-900);
    font-size: clamp(1.25rem, 2vw, 1.55rem);
    letter-spacing: -0.015em;
    line-height: 1.25;
    margin: 6px 0;
}

.ready-card-content > p {
    color: var(--ov-ink-700);
    margin: 0;
    max-width: 62ch;
}

.ready-status {
    align-items: center;
    color: var(--ov-green-700);
    display: flex;
    font-size: 0.875rem;
    font-weight: 750;
    gap: var(--ov-space-1);
}

.ready-check {
    align-items: center;
    background: var(--ov-green-100);
    border-radius: 50%;
    display: inline-flex;
    height: 28px;
    justify-content: center;
    width: 28px;
}

.ready-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 12px;
}

.ready-meta > span {
    display: flex;
    flex-direction: column;
}

.ready-meta strong {
    color: var(--ov-ink-900);
    font-size: 0.875rem;
}

.ready-meta small {
    color: var(--ov-ink-700);
    font-size: 0.75rem;
}

.interaction-space > p.user,
.interaction-space > p.app {
    border-radius: var(--ov-radius-md);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 var(--ov-space-2);
    max-width: min(78%, 720px);
    padding: 14px var(--ov-space-2);
    width: fit-content;
}

.interaction-space > p.app {
    background: var(--ov-white);
    border: 1px solid var(--ov-neutral-200);
    color: var(--ov-ink-900);
}

.interaction-space > p.user {
    background: var(--ov-blue-700);
    color: var(--ov-white);
    margin-left: auto;
}

.interaction-space p > span.app,
.interaction-space p > span.user {
    background: transparent;
    color: inherit;
    display: block;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    margin: 0 0 3px;
    padding: 0;
    text-transform: uppercase;
}

.interaction-space p > span.app {
    color: var(--ov-blue-700);
}

.microphone-dock {
    align-items: center;
    background: #f9fbfd;
    border-top: 1px solid var(--ov-neutral-200);
    display: flex;
    gap: var(--ov-space-2);
    justify-content: space-between;
    padding: 12px var(--ov-space-3);
}

.microphone-guidance {
    display: flex;
    flex-direction: column;
}

.microphone-guidance strong {
    color: var(--ov-ink-900);
    font-size: 0.9375rem;
}

.microphone-guidance span {
    color: var(--ov-ink-700);
    font-size: 0.8125rem;
}

.mic-button {
    align-items: center;
    background: var(--ov-blue-700);
    border: 3px solid var(--ov-white);
    border-radius: 999px;
    box-shadow: 0 0 0 2px var(--ov-blue-700), 0 8px 20px rgba(22, 78, 166, 0.22);
    color: var(--ov-white);
    cursor: pointer;
    display: inline-flex;
    font-size: 1.3rem;
    font-weight: 750;
    height: 64px;
    justify-content: center;
    margin: 0 2px 0 0;
    min-width: 64px;
    padding: 0 18px;
    transition: background-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
    width: auto;
}

.mic-button:hover:not(:disabled) {
    background: #103f8b;
    box-shadow: 0 0 0 2px #103f8b, 0 10px 24px rgba(22, 78, 166, 0.28);
}

.mic-button:focus-visible {
    outline: 3px solid var(--ov-yellow-500);
    outline-offset: 5px;
}

.mic-button:disabled,
.mic-button.disabled {
    background: #8b99ad;
    border-color: var(--ov-white);
    box-shadow: 0 0 0 2px #8b99ad;
    color: var(--ov-white);
    cursor: not-allowed;
    transform: none;
}

footer {
    color: #718096;
    font-size: 0.75rem;
    margin-top: auto;
    padding: var(--ov-space-2) var(--ov-space-3);
}

@media (max-width: 1099px) {
    .container.speaking-workspace {
        padding-top: var(--ov-space-3);
    }

    .conversation-panel {
        min-height: min(660px, max(420px, calc(100vh - 260px)));
    }
}

@media (max-width: 767px) {
    .header-inner {
        min-height: 56px;
        padding: var(--ov-space-1) var(--ov-space-2);
    }

    .brand-mark {
        flex-basis: 36px;
        height: 36px;
    }

    .header-title,
    .welcome-text {
        display: none;
    }

    .auth-buttons .btn {
        min-height: 38px;
        padding: 7px 11px;
    }

    .navbar {
        overflow-x: auto;
        overscroll-behavior-inline: contain;
        width: 100%;
    }

    .navbar-inner {
        gap: var(--ov-space-1);
        min-width: max-content;
        padding: 4px var(--ov-space-2);
    }

    .navbar a,
    .disabled-link {
        padding: 7px 9px;
    }

    .container.speaking-workspace {
        padding: var(--ov-space-3) var(--ov-space-2) var(--ov-space-2);
    }

    .workspace-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: var(--ov-space-1);
        margin-bottom: var(--ov-space-2);
    }

    .workspace-heading h1 {
        font-size: 1.75rem;
    }

    .workspace-subtitle {
        font-size: 0.9375rem;
    }

    .conversation-panel {
        border-radius: var(--ov-radius-md);
        min-height: calc(100svh - 238px);
    }

    .conversation-header,
    .interaction-space,
    .microphone-dock {
        padding-left: var(--ov-space-2);
        padding-right: var(--ov-space-2);
    }

    .interaction-space {
        min-height: max(240px, calc(100svh - 500px));
    }

    .ready-card {
        gap: var(--ov-space-2);
        grid-template-columns: 76px minmax(0, 1fr);
        padding: var(--ov-space-2);
    }

    .hero-img {
        max-width: 76px;
    }

    .ready-meta {
        gap: var(--ov-space-2);
    }

    .interaction-space > p.user,
    .interaction-space > p.app {
        max-width: 90%;
    }

    .microphone-dock {
        position: sticky;
        bottom: 0;
        z-index: 2;
    }
}

@media (max-width: 479px) {
    .brand-name {
        font-size: 1rem;
    }

    .color-toggle-button {
        font-size: 0.75rem;
    }

    .container.speaking-workspace {
        padding-left: var(--ov-space-1);
        padding-right: var(--ov-space-1);
    }

    .practice-badge {
        display: none;
    }

    .conversation-header {
        align-items: flex-start;
    }

    .ready-card {
        align-items: start;
        grid-template-columns: 72px minmax(0, 1fr);
        text-align: left;
    }

    .hero-img {
        max-width: 72px;
    }

    .ready-meta {
        gap: var(--ov-space-1) var(--ov-space-2);
    }

    .microphone-guidance span {
        max-width: 25ch;
    }
}

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