/* Public teacher landing page. Tokens come from theme.css. */

/* ===== Landing Layout ===== */
.landing-body {
    min-height: 100vh;
    background: var(--bg-secondary);
    font-family: 'Poppins', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.landing-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    position: sticky;
    top: 0;
    z-index: 100;
}

.landing-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
}

.landing-logo picture { display: block; }

.landing-logo img {
    display: block;
    width: auto;
    height: 40px;
}

.landing-logo .logo-sub {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    color: var(--text-tertiary);
    text-transform: none;
}

.landing-nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.landing-nav-login {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: color 0.15s, background 0.15s;
}

.landing-nav-login:hover {
    color: var(--accent);
    background: var(--accent-subtle);
}

.landing-nav-trial {
    margin: 0;
    display: flex;
}

/* ===== Hero ===== */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    padding: 4rem 2rem 3rem;
}

.hero-text h1 {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.hero-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.hero-form-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    padding: 0;
    overflow: hidden;
}

/* ===== Trial chat preview ===== */
.trial-preview {
    display: block;
    border: none;
    background: none;
    width: 100%;
    padding: 0;
    margin: 0;
    font: inherit;
    color: inherit;
    text-align: left;
    cursor: pointer;
}

.trial-preview-head {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--border-primary);
    background: var(--bg-secondary);
}

.trial-preview-avatar {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--accent);
    color: var(--text-on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9375rem;
    flex-shrink: 0;
}

.trial-preview-head-title {
    font-weight: 700;
    font-size: 0.9375rem;
    color: var(--text-primary);
    line-height: 1.2;
}

.trial-preview-head-sub {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    line-height: 1.2;
}

.trial-preview-body {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.trial-bubble {
    max-width: 85%;
    padding: 0.625rem 0.875rem;
    border-radius: 1rem;
    font-size: 0.9375rem;
    line-height: 1.45;
}

.trial-bubble.user {
    align-self: flex-end;
    background: var(--accent);
    color: var(--text-on-primary);
    border-bottom-right-radius: 0.25rem;
}

.trial-bubble.bot {
    align-self: flex-start;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-bottom-left-radius: 0.25rem;
}

.trial-preview-input {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin: 0 1.25rem 1.25rem;
    padding: 0.6875rem 0.875rem;
    border: 1px solid var(--border-primary);
    border-radius: 0.75rem;
    background: var(--bg-primary);
    color: var(--text-tertiary);
    font-size: 0.9375rem;
}

.trial-preview-input .send-icon {
    margin-left: auto;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--accent);
    color: var(--text-on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.trial-preview:hover .trial-preview-input {
    border-color: var(--accent);
}

.trial-preview-cta {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    padding: 0 1.25rem 1.25rem;
}

.hero-alert {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin: 1rem 1.25rem 0;
    padding: 0.75rem 0.875rem;
    border-radius: 0.625rem;
    background: var(--warning-subtle);
    border: 1px solid var(--warning);
    color: var(--text-primary);
    font-size: 0.875rem;
    line-height: 1.4;
}

.hero-alert svg {
    flex-shrink: 0;
    margin-top: 0.0625rem;
    color: var(--warning);
}

.hero-login-hint {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin: 0;
    padding: 0 1.25rem 1.25rem;
}

.hero-login-hint a {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
}

.hero-login-hint a:hover {
    text-decoration: underline;
}

/* ===== Video ===== */
.video-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem 1.5rem;
    text-align: center;
}
.tablet-frame {
    display: block;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 1.5rem;
    padding: 1rem;
    box-shadow: var(--shadow-lg);
    position: relative;
}
.tablet-frame::before {
    content: '';
    display: block;
    width: 4px;
    height: 4px;
    background: var(--border-secondary);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 0.375rem;
    transform: translateY(-50%);
}
.tablet-frame video {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: 0.75rem;
    display: block;
    background: #000;
}

/* ===== Benefits ===== */
.benefits {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 2rem 3rem;
}

.benefits-header {
    text-align: center;
    margin-bottom: 2rem;
}

.benefits-header h2 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.benefits-header p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.benefits-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.benefit-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 0.75rem;
    padding: 1.5rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.benefit-card:hover {
    border-color: var(--border-secondary);
    box-shadow: var(--shadow-sm);
}

.benefit-card .before {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    font-style: italic;
}

.benefit-card .after {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1.5;
}

.benefit-card .after svg {
    flex-shrink: 0;
    margin-top: 0.125rem;
    color: var(--accent);
}

/* ===== Final CTA ===== */
.final-cta {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-primary);
    padding: 2.5rem 2rem;
    text-align: center;
}

.final-cta h2 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 0.375rem;
}

.final-cta p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* ===== Footer ===== */
.landing-footer {
    text-align: center;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-primary);
    background: var(--bg-secondary);
}

.landing-footer a {
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    text-decoration: none;
}

.landing-footer a:hover {
    color: var(--accent);
}

/* ===== Mobile ===== */
@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        padding: 2rem 1rem 2rem;
        gap: 2rem;
    }

    .hero-text h1 {
        font-size: 1.75rem;
    }

    .hero-text p {
        font-size: 1rem;
        margin-bottom: 0;
    }

    .video-section {
        padding: 0 1rem 3rem;
    }

    .benefits {
        padding: 2rem 1rem 3rem;
    }

    .benefits-header h2 {
        font-size: 1.375rem;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .final-cta {
        padding: 3rem 1rem;
    }

    .final-cta h2 {
        font-size: 1.375rem;
    }

    .landing-nav {
        padding: 0.75rem 1rem;
    }
}

/* Layout helpers that replaced inline `style=` attributes. */
.landing-note {
    margin-top: 1.25rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.landing-cta-btn {
    display: inline-block;
    max-width: 400px;
    text-decoration: none;
}

.landing-fineprint {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 0.75rem;
}