.couples-root {
    --bg: #1a1626;
    --bg-deep: #14111e;
    --surface: #251f33;
    --surface-2: #2e2640;
    --divider: #332b47;
    --primary: #8b7ab8;
    --primary-hover: #9c8cc8;
    --accent: #a89bc9;
    --text: #e8e3f2;
    --text-secondary: #a89bc9;
    --text-tertiary: #7a6f95;
    --danger: #c98ba0;
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    width: 100%;
    color: var(--text);
    background: var(--bg-deep);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.couples-root *,
.couples-root *::before,
.couples-root *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

.couples-root button,
.couples-root input,
.couples-root textarea,
.couples-root select {
    font: inherit;
}

.couples-root.embedded {
    padding: 14px;
    border-radius: 28px;
    border: 1px solid #2c2440;
    background: linear-gradient(180deg, #161222 0%, #100d19 100%);
    box-shadow: 0 26px 60px rgba(0, 0, 0, 0.34);
    display: flex;
    justify-content: center;
}

.couples-root.standalone {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: stretch;
    background: #0c0a14;
}

.couples-root .app {
    width: 100%;
    max-width: 480px;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.couples-root.embedded .app {
    min-height: min(900px, 82vh);
    border-radius: 24px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.44);
}

.couples-root.standalone .app {
    min-height: 100vh;
}

@media (min-width: 481px) {
    .couples-root.standalone {
        padding: 24px;
    }

    .couples-root.standalone .app {
        border-radius: 28px;
        box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
        min-height: min(920px, calc(100vh - 48px));
        max-height: 920px;
    }
}

.couples-root .topbar {
    padding: calc(14px + var(--safe-top)) 18px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--divider);
    background: var(--bg);
    position: sticky;
    top: 0;
    z-index: 5;
    min-height: calc(56px + var(--safe-top));
}

.couples-root .brand {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.couples-root .brand-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 12px rgba(139, 122, 184, 0.6);
}

.couples-root .topbar-right {
    display: flex;
    gap: 8px;
    align-items: center;
}

.couples-root .icon-btn {
    background: none;
    border: 1px solid var(--divider);
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    transition: all 0.15s ease;
}

.couples-root .icon-btn:hover,
.couples-root .icon-btn:active {
    background: var(--surface);
    color: var(--text);
}

.couples-root .icon-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.couples-root .icon-btn:disabled:hover,
.couples-root .icon-btn:disabled:active {
    background: none;
    color: var(--text-secondary);
}

.couples-root .body {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
}

.couples-root .screen {
    display: none;
    flex: 1;
    flex-direction: column;
    padding: 28px 22px calc(28px + var(--safe-bottom));
    animation: couplesFadeIn 0.35s ease;
}

.couples-root .screen.active {
    display: flex;
}

@keyframes couplesFadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.couples-root h1 {
    font-size: 1.85rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    letter-spacing: -0.01em;
    line-height: 1.15;
    color: var(--text);
}

.couples-root h2 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
    color: var(--text);
}

.couples-root .subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.55;
    margin-bottom: 1.75rem;
}

.couples-root .step-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.65rem;
}

.couples-root .card {
    background: var(--surface);
    border: 1px solid var(--divider);
    border-radius: 16px;
    padding: 18px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease, transform 0.05s ease;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.couples-root .card:active {
    transform: scale(0.99);
}

.couples-root .card:hover {
    border-color: var(--primary);
}

.couples-root .card.selected {
    border-color: var(--primary);
    background: var(--surface-2);
    box-shadow: 0 0 0 3px rgba(139, 122, 184, 0.15);
}

.couples-root .card-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.couples-root .card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
}

.couples-root .card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.couples-root .check {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border: 1.5px solid var(--divider);
    border-radius: 50%;
    position: relative;
    transition: all 0.2s ease;
}

.couples-root .card.selected .check {
    background: var(--primary);
    border-color: var(--primary);
}

.couples-root .card.selected .check::after {
    content: "";
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 11px;
    border: solid var(--bg);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.couples-root .voice-group {
    margin-bottom: 18px;
}

.couples-root .voice-group-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-tertiary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.couples-root .chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.couples-root .chip {
    background: var(--surface);
    border: 1px solid var(--divider);
    color: var(--text);
    padding: 10px 14px;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
}

.couples-root .chip:active {
    transform: scale(0.97);
}

.couples-root .chip.selected {
    border-color: var(--primary);
    background: var(--surface-2);
    color: var(--text);
    box-shadow: 0 0 0 3px rgba(139, 122, 184, 0.15);
}

.couples-root .field {
    margin-bottom: 18px;
}

.couples-root .field-label {
    display: block;
    font-size: 0.92rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text);
}

.couples-root .field-hint {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}

.couples-root input[type="text"],
.couples-root textarea,
.couples-root select {
    width: 100%;
    background: var(--surface);
    border: 1px solid var(--divider);
    color: var(--text);
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 1rem;
    transition: border-color 0.15s;
    -webkit-appearance: none;
}

.couples-root input:focus,
.couples-root textarea:focus,
.couples-root select:focus {
    outline: none;
    border-color: var(--primary);
}

.couples-root .scale {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
}

.couples-root .scale-btn {
    background: var(--surface);
    border: 1px solid var(--divider);
    color: var(--text);
    padding: 12px 0;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
}

.couples-root .scale-btn.selected {
    border-color: var(--primary);
    background: var(--surface-2);
    box-shadow: 0 0 0 2px rgba(139, 122, 184, 0.15);
}

.couples-root .scale-ends {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.couples-root .button-row {
    margin-top: auto;
    padding-top: 24px;
    display: flex;
    gap: 10px;
}

.couples-root .btn {
    flex: 1;
    padding: 16px;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.15s ease;
    -webkit-appearance: none;
}

.couples-root .btn:active {
    transform: scale(0.98);
}

.couples-root .btn-primary {
    background: var(--primary);
    color: #1a1626;
}

.couples-root .btn-primary:hover {
    background: var(--primary-hover);
}

.couples-root .btn-primary:disabled {
    background: var(--surface-2);
    color: var(--text-tertiary);
    cursor: not-allowed;
}

.couples-root .btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--divider);
}

.couples-root .btn-ghost:hover {
    background: var(--surface);
    color: var(--text);
}

.couples-root .btn-text {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 10px;
}

.couples-root .notice {
    background: var(--surface);
    border: 1px solid var(--divider);
    border-left: 3px solid var(--primary);
    border-radius: 12px;
    padding: 14px 16px;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--text-secondary);
    margin-bottom: 14px;
}

.couples-root .notice p {
    margin: 0;
}

.couples-root .crisis-notice {
    border-left-color: var(--danger);
    margin-top: 14px;
}

.couples-root .checkbox-row {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    background: var(--surface);
    border: 1px solid var(--divider);
    border-radius: 12px;
    padding: 14px;
    margin-bottom: 10px;
    cursor: pointer;
}

.couples-root .checkbox-row.checked {
    border-color: var(--primary);
}

.couples-root .cbox {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    border: 1.5px solid var(--divider);
    flex-shrink: 0;
    position: relative;
    margin-top: 2px;
    transition: all 0.15s;
}

.couples-root .checkbox-row.checked .cbox {
    background: var(--primary);
    border-color: var(--primary);
}

.couples-root .checkbox-row.checked .cbox::after {
    content: "";
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 11px;
    border: solid var(--bg);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.couples-root .checkbox-text {
    font-size: 0.92rem;
    color: var(--text);
    line-height: 1.5;
}

.couples-root .checkbox-text strong {
    color: var(--text);
    font-weight: 600;
}

.couples-root .checkbox-text small {
    color: var(--text-tertiary);
    display: block;
    margin-top: 2px;
    font-size: 0.82rem;
}

.couples-root .session-header {
    padding: calc(14px + var(--safe-top)) 18px 12px;
    border-bottom: 1px solid var(--divider);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    background: var(--bg);
    position: sticky;
    top: 0;
    z-index: 5;
}

.couples-root .session-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.couples-root .session-title {
    font-size: 0.95rem;
    font-weight: 600;
}

.couples-root .session-sub {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.couples-root .pulse {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    position: relative;
}

.couples-root .pulse::after {
    content: "";
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    opacity: 0.5;
    animation: couplesPulse 1.6s infinite ease-out;
}

@keyframes couplesPulse {
    0% {
        transform: scale(1);
        opacity: 0.5;
    }
    100% {
        transform: scale(1.8);
        opacity: 0;
    }
}

.couples-root .messages {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.couples-root .msg {
    max-width: 86%;
    padding: 12px 15px;
    border-radius: 18px;
    font-size: 0.96rem;
    line-height: 1.55;
    word-wrap: break-word;
    animation: couplesMsgIn 0.3s ease;
}

@keyframes couplesMsgIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.couples-root .msg-bot {
    background: var(--surface);
    border: 1px solid var(--divider);
    color: var(--text);
    align-self: flex-start;
    border-bottom-left-radius: 6px;
}

.couples-root .msg-bot .speaker {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

.couples-root .msg-user {
    background: var(--primary);
    color: #1a1626;
    align-self: flex-end;
    font-weight: 500;
    border-bottom-right-radius: 6px;
}

.couples-root .msg-user .speaker {
    font-size: 0.7rem;
    color: rgba(26, 22, 38, 0.7);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

.couples-root .typing {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: 4px 0;
}

.couples-root .typing span {
    width: 7px;
    height: 7px;
    background: var(--text-tertiary);
    border-radius: 50%;
    animation: couplesBounce 1.2s infinite ease-in-out both;
}

.couples-root .typing span:nth-child(2) {
    animation-delay: 0.15s;
}

.couples-root .typing span:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes couplesBounce {
    0%,
    80%,
    100% {
        transform: scale(0.7);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.couples-root .composer {
    border-top: 1px solid var(--divider);
    padding: 12px 14px calc(12px + var(--safe-bottom));
    background: var(--bg);
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

.couples-root .composer textarea {
    flex: 1;
    min-height: 44px;
    max-height: 120px;
    border-radius: 22px;
    padding: 11px 16px;
    resize: none;
    font-size: 0.96rem;
    line-height: 1.4;
}

.couples-root .composer-buttons {
    display: flex;
    gap: 6px;
}

.couples-root .speaker-toggle {
    display: flex;
    background: var(--surface);
    border: 1px solid var(--divider);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 12px;
}

.couples-root .speaker-toggle button {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: 9px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
}

.couples-root .speaker-toggle button.active {
    background: var(--surface-2);
    color: var(--text);
}

.couples-root .recap-card {
    background: var(--surface);
    border: 1px solid var(--divider);
    border-radius: 16px;
    padding: 18px;
    margin-bottom: 12px;
}

.couples-root .recap-card h3 {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 8px;
}

.couples-root .recap-card p {
    font-size: 0.95rem;
    line-height: 1.55;
    color: var(--text);
}

.couples-root .recap-list {
    list-style: none;
}

.couples-root .recap-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--divider);
    font-size: 0.92rem;
    color: var(--text);
}

.couples-root .recap-list li:last-child {
    border-bottom: none;
}

.couples-root .recap-list li::before {
    content: "— ";
    color: var(--text-tertiary);
}

.couples-root .settings-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.couples-root .settings-row {
    background: var(--surface);
    border: 1px solid var(--divider);
    padding: 14px 16px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.95rem;
    cursor: pointer;
}

.couples-root .settings-row .label {
    color: var(--text);
}

.couples-root .settings-row .value {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.couples-root .hero {
    text-align: center;
    padding-top: 30px;
    padding-bottom: 24px;
}

.couples-root .logo-orb {
    width: 92px;
    height: 92px;
    border-radius: 50%;
    margin: 0 auto 24px;
    background: radial-gradient(circle at 30% 30%, var(--accent), var(--primary) 60%, var(--surface-2));
    box-shadow: 0 12px 32px rgba(139, 122, 184, 0.3);
    position: relative;
}

.couples-root .logo-orb::after {
    content: "";
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 1px solid rgba(168, 155, 201, 0.2);
}

.couples-root .hero h1 {
    font-size: 2.1rem;
}

.couples-root .hero .subtitle {
    font-size: 1.05rem;
    max-width: 320px;
    margin: 0 auto 20px;
}

.couples-root .hero-cta {
    padding: 0 20px;
}

@media (max-width: 600px) {
    .couples-root.embedded {
        padding: 10px;
        border-radius: 22px;
    }

    .couples-root.embedded .app {
        min-height: min(860px, 78vh);
        border-radius: 20px;
    }

    .couples-root h1 {
        font-size: 1.75rem;
    }

    .couples-root h2 {
        font-size: 1.15rem;
    }

    .couples-root .screen {
        padding: 24px 18px calc(22px + var(--safe-bottom));
    }

    .couples-root .session-header {
        padding-left: 14px;
        padding-right: 14px;
    }

    .couples-root .composer {
        padding-left: 10px;
        padding-right: 10px;
    }
}

@media (max-width: 480px) {
    .couples-root.standalone {
        background: var(--bg-deep);
    }

    .couples-root.standalone .app {
        min-height: 100vh;
    }
}