:root {
    --lt-tts-bg: #f6f5f2;
    --lt-tts-panel: #ffffff;
    --lt-tts-ink: #1c1f23;
    --lt-tts-muted: #667085;
    --lt-tts-line: #d9dde3;
    --lt-tts-accent: #2563eb;
    --lt-tts-accent-dark: #1d4ed8;
    --lt-tts-success: #15803d;
    --lt-tts-danger: #b42318;
}

* {
    box-sizing: border-box;
}

body.lt-tts-body {
    min-height: 100vh;
    margin: 0;
    color: var(--lt-tts-ink);
    background: var(--lt-tts-bg);
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
}

.lt-tts-shell {
    display: grid;
    min-height: 100vh;
    align-items: center;
    width: min(100%, 760px);
    margin: 0 auto;
    padding: 24px;
}

.lt-tts-auth,
.lt-tts-main {
    width: 100%;
    border: 1px solid var(--lt-tts-line);
    border-radius: 8px;
    background: var(--lt-tts-panel);
    box-shadow: 0 24px 60px rgba(28, 31, 35, 0.10);
}

.lt-tts-landing {
    width: 100%;
    padding: 30px 0;
}

.lt-tts-auth {
    max-width: 440px;
    margin: 0 auto;
    padding: 28px;
}

.lt-tts-main {
    padding: 30px;
}

.lt-tts-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    font-weight: 800;
}

.lt-tts-mark {
    display: inline-grid;
    align-items: center;
    justify-items: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    color: #ffffff;
    background: #1c1f23;
    font-size: 13px;
    letter-spacing: 0;
}

.lt-tts-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: 28px;
    align-items: center;
    margin-top: 34px;
}

.lt-tts-hero h1 {
    max-width: 560px;
    margin: 0;
    font-size: 44px;
    line-height: 1.05;
    letter-spacing: 0;
}

.lt-tts-hero p {
    max-width: 540px;
    margin: 18px 0 0;
    color: var(--lt-tts-muted);
    font-size: 17px;
    line-height: 1.6;
}

.lt-tts-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.lt-tts-hero-actions button,
.lt-tts-back {
    min-height: 42px;
    border-radius: 8px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.lt-tts-hero-actions button:first-child {
    border: 0;
    padding: 0 18px;
    color: #ffffff;
    background: var(--lt-tts-accent);
}

.lt-tts-hero-actions button:first-child:hover {
    background: var(--lt-tts-accent-dark);
}

.lt-tts-hero-actions button:last-child,
.lt-tts-back {
    border: 1px solid var(--lt-tts-line);
    padding: 0 16px;
    color: var(--lt-tts-ink);
    background: #ffffff;
}

.lt-tts-hero-actions button:last-child:hover,
.lt-tts-back:hover {
    background: #f3f4f6;
}

.lt-tts-preview {
    display: grid;
    gap: 12px;
    padding: 22px;
    border: 1px solid var(--lt-tts-line);
    border-radius: 8px;
    background: #f8fafc;
}

.lt-tts-preview span {
    color: var(--lt-tts-muted);
    font-size: 13px;
    font-weight: 700;
}

.lt-tts-preview strong {
    font-size: 18px;
}

.lt-tts-preview small {
    color: var(--lt-tts-muted);
    font-size: 12px;
    font-weight: 700;
}

.lt-tts-wave {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 7px;
    align-items: end;
    height: 72px;
}

.lt-tts-wave i {
    display: block;
    width: 100%;
    border-radius: 999px;
    background: var(--lt-tts-accent);
}

.lt-tts-wave i:nth-child(1) { height: 28px; }
.lt-tts-wave i:nth-child(2) { height: 46px; }
.lt-tts-wave i:nth-child(3) { height: 34px; }
.lt-tts-wave i:nth-child(4) { height: 62px; }
.lt-tts-wave i:nth-child(5) { height: 40px; }
.lt-tts-wave i:nth-child(6) { height: 54px; }
.lt-tts-wave i:nth-child(7) { height: 30px; }

.lt-tts-back,
.lt-tts-resend {
    margin-bottom: 18px;
}

.lt-tts-resend {
    min-height: 42px;
    margin: 2px 0 0;
    padding: 0 16px;
    border: 1px solid var(--lt-tts-line);
    border-radius: 8px;
    color: var(--lt-tts-ink);
    background: #ffffff;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.lt-tts-resend:hover {
    background: #f3f4f6;
}

.lt-tts-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    margin: 26px 0 22px;
    padding: 4px;
    border: 1px solid var(--lt-tts-line);
    border-radius: 8px;
    background: #f3f4f6;
}

.lt-tts-tabs button,
.lt-tts-secondary,
.lt-tts-actions button,
.lt-tts-form button {
    min-height: 42px;
    border: 0;
    border-radius: 8px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.lt-tts-tabs button {
    color: var(--lt-tts-muted);
    background: transparent;
}

.lt-tts-tabs button.is-active {
    color: var(--lt-tts-ink);
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(28, 31, 35, 0.12);
}

.lt-tts-form,
.lt-tts-generator {
    display: grid;
    gap: 16px;
}

.lt-tts-form label,
.lt-tts-generator label {
    display: grid;
    gap: 7px;
    font-size: 13px;
    font-weight: 700;
    color: #344054;
}

.lt-tts-form input,
.lt-tts-generator textarea,
.lt-tts-generator select {
    width: 100%;
    border: 1px solid var(--lt-tts-line);
    border-radius: 8px;
    color: var(--lt-tts-ink);
    background: #ffffff;
    font: inherit;
    font-size: 15px;
}

.lt-tts-form input,
.lt-tts-generator select {
    height: 46px;
    padding: 0 12px;
}

.lt-tts-generator textarea {
    min-height: 104px;
    resize: vertical;
    padding: 12px;
    line-height: 1.45;
}

.lt-tts-form input:focus,
.lt-tts-generator textarea:focus,
.lt-tts-generator select:focus {
    outline: 3px solid rgba(37, 99, 235, 0.18);
    border-color: var(--lt-tts-accent);
}

.lt-tts-form button,
.lt-tts-actions button {
    padding: 0 18px;
    color: #ffffff;
    background: var(--lt-tts-accent);
}

.lt-tts-form button:hover,
.lt-tts-actions button:hover {
    background: var(--lt-tts-accent-dark);
}

.lt-tts-form button:disabled,
.lt-tts-actions button:disabled {
    cursor: not-allowed;
    background: #98a2b3;
}

.lt-tts-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 28px;
}

.lt-tts-header p {
    margin: 8px 0 0;
    color: var(--lt-tts-muted);
    font-size: 14px;
}

.lt-tts-secondary {
    padding: 0 14px;
    border: 1px solid var(--lt-tts-line);
    color: var(--lt-tts-ink);
    background: #ffffff;
}

.lt-tts-secondary:hover {
    background: #f3f4f6;
}

.lt-tts-form-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 160px;
    gap: 14px;
    align-items: end;
}

.lt-tts-quota {
    display: grid;
    gap: 6px;
    min-height: 70px;
    padding: 13px 14px;
    border: 1px solid #bbf7d0;
    border-radius: 8px;
    background: #f0fdf4;
}

.lt-tts-quota span {
    color: var(--lt-tts-success);
    font-size: 12px;
    font-weight: 700;
}

.lt-tts-quota strong {
    color: #14532d;
    font-size: 18px;
}

.lt-tts-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.lt-tts-actions span {
    color: var(--lt-tts-muted);
    font-size: 13px;
    font-weight: 700;
}

.lt-tts-player {
    margin-top: 22px;
    padding-top: 22px;
    border-top: 1px solid var(--lt-tts-line);
}

.lt-tts-player audio {
    width: 100%;
}

.lt-tts-message {
    min-height: 22px;
    margin: 16px 0 0;
    color: var(--lt-tts-muted);
    font-size: 14px;
    font-weight: 600;
}

.lt-tts-message.is-error {
    color: var(--lt-tts-danger);
}

.lt-tts-message.is-success {
    color: var(--lt-tts-success);
}

.lt-tts-legal {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 18px;
    font-size: 13px;
    font-weight: 700;
}

.lt-tts-legal a {
    color: var(--lt-tts-muted);
    text-decoration: none;
}

.lt-tts-legal a:hover {
    color: var(--lt-tts-ink);
}

[hidden] {
    display: none !important;
}

@media (max-width: 640px) {
    .lt-tts-shell {
        align-items: stretch;
        padding: 14px;
    }

    .lt-tts-auth,
    .lt-tts-main {
        padding: 20px;
        box-shadow: none;
    }

    .lt-tts-landing {
        padding: 20px 0;
    }

    .lt-tts-hero {
        grid-template-columns: 1fr;
        gap: 24px;
        margin-top: 26px;
    }

    .lt-tts-hero h1 {
        font-size: 34px;
    }

    .lt-tts-header,
    .lt-tts-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .lt-tts-form-row {
        grid-template-columns: 1fr;
    }
}