html, body {
    font-family: Roboto, system-ui, -apple-system, "Segoe UI", sans-serif;
    margin: 0;
    -webkit-font-smoothing: antialiased;
}

#app {
    min-height: 100vh;
}

/* ── Layout ─────────────────────────────────────── */
.public-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: 64px;
}

.public-content {
    flex: 1;
    padding: 1.5rem 1rem 3rem;
}

.app-main {
    padding-top: 64px !important;
    min-height: 100vh;
}

.app-bar-blur {
    backdrop-filter: blur(12px);
}

.brand-link {
    color: inherit !important;
    text-decoration: none !important;
}

.brand-text {
    font-weight: 600;
    letter-spacing: -0.02em;
}

.cta-btn {
    font-weight: 600 !important;
}

.site-footer {
    padding: 1.5rem 1rem;
    border-top: 1px solid rgba(128, 128, 128, 0.15);
}

.app-footer {
    margin-top: 2rem;
    border-top: none;
    padding-top: 0.5rem;
}

.legal-page {
    max-width: 42rem;
    margin: 2rem auto;
}

/* ── Auth cards ───────────────────────────────── */
.auth-card {
    max-width: 420px;
    margin: 2rem auto;
    border-radius: 16px !important;
}

.auth-card-wide {
    max-width: 560px;
}

/* ── Landing ──────────────────────────────────── */
.hero-section {
    padding: 2rem 0 3rem;
}

.hero-title {
    font-weight: 700 !important;
    line-height: 1.15 !important;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    line-height: 1.6 !important;
    max-width: 36rem;
}

.hero-card {
    border-radius: 16px !important;
    width: 100%;
    max-width: 340px;
}

.chat-bubble {
    border-radius: 12px !important;
}

.chat-bubble.tutor {
    background: rgba(37, 99, 235, 0.08);
}

.chat-bubble.user {
    margin-left: auto;
    max-width: 90%;
    background: rgba(100, 116, 139, 0.12);
}

.grammar-hint {
    font-size: 0.85rem;
}

.section-block {
    padding: 3rem 0;
}

.feature-card,
.pricing-card,
.stat-card {
    border-radius: 16px !important;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-2px);
}

.pricing-card-featured {
    border: 2px solid var(--mud-palette-primary);
}

.page-title {
    font-weight: 700 !important;
}

.google-btn-container {
    display: flex;
    justify-content: center;
}

.theme-toggle .mud-icon-button {
    padding: 6px;
}

.user-email {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ── Mobile ─────────────────────────────────────── */
@media (max-width: 600px) {
    .hero-title {
        font-size: 1.75rem !important;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch !important;
    }

    .hero-actions .mud-button {
        width: 100%;
    }

    .auth-card {
        margin: 1rem auto;
        border-radius: 12px !important;
    }

    .public-content {
        padding: 1rem 0.75rem 2rem;
    }
}

/* ── Blazor defaults ──────────────────────────── */
h1:focus {
    outline: none;
}

#blazor-error-ui {
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem;
    position: fixed;
    width: 100%;
    z-index: 10000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

.loading-progress {
    position: relative;
    display: block;
    width: 8rem;
    height: 8rem;
    margin: 20vh auto 1rem;
}

.loading-progress circle {
    fill: none;
    stroke: #e0e0e0;
    stroke-width: 0.6rem;
    transform-origin: 50% 50%;
    transform: rotate(-90deg);
}

.loading-progress circle:last-child {
    stroke: #2563EB;
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
    transition: stroke-dasharray 0.05s ease-in-out;
}

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: bold;
    inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
}

.loading-progress-text:after {
    content: var(--blazor-load-percentage-text, "Loading");
}