:root {
    --md-sys-color-surface: #212121;
    --md-sys-color-surface-variant: #2c2c2c;
    --md-sys-color-on-surface: #e0e0e0;
    --md-sys-color-on-surface-variant: #bdbdbd;
    --md-sys-color-primary: #03a9f4;
    --md-sys-color-primary-container: #0277bd;
    --md-sys-color-secondary: #4fc3f7;
    --md-sys-color-error: #cf6679;
    --md-sys-color-outline: #424242;
    --md-elevation-1: 0 2px 6px rgba(0, 0, 0, 0.35);
    --md-elevation-2: 0 6px 18px rgba(0, 0, 0, 0.45);
    --md-radius-large: 20px;
    --md-radius-medium: 16px;
    --md-radius-small: 12px;
    --container-width: min(1100px, 92vw);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body.material-dark {
    margin: 0;
    font-family: 'Roboto', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover,
a:focus {
    text-decoration: underline;
}

main {
    display: block;
}

.material-symbol {
    font-family: 'Material Symbols Rounded', sans-serif;
    font-weight: 400;
    font-style: normal;
    font-size: 1.25rem;
    display: inline-flex;
    vertical-align: middle;
    letter-spacing: normal;
    text-transform: none;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    -webkit-font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.app-bar {
    position: fixed;
    inset: 0 0 auto 0;
    background: rgba(33, 33, 33, 0.92);
    backdrop-filter: blur(12px);
    z-index: 999;
}

.app-bar.elevation-2 {
    box-shadow: var(--md-elevation-2);
}

.app-bar__inner {
    margin: 0 auto;
    width: var(--container-width);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    gap: 1.25rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    color: var(--md-sys-color-on-surface);
    text-decoration: none;
}

.brand__logo {
    width: 3rem;
    height: 3rem;
    border-radius: 1.25rem;
    display: grid;
    place-content: center;
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    font-weight: 700;
    letter-spacing: 0.08em;
}

.brand__name {
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: 0.04em;
}

.brand__tagline {
    display: block;
    font-size: 0.85rem;
    color: var(--md-sys-color-on-surface-variant);
}

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

.nav ul {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
}

.nav__link {
    display: inline-flex;
    align-items: center;
    padding: 0.65rem 1.1rem;
    border-radius: 999px;
    color: var(--md-sys-color-on-surface);
    transition: background 0.2s ease, color 0.2s ease;
}

.nav__link:hover,
.nav__link:focus {
    background: rgba(3, 169, 244, 0.12);
    color: var(--md-sys-color-primary);
}

.nav__link.is-active {
    background: rgba(3, 169, 244, 0.22);
    color: var(--md-sys-color-primary);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--md-sys-color-on-surface);
    padding: 0.5rem;
    border-radius: 50%;
}

.cta-button {
    padding: 0.8rem 1.4rem;
    border-radius: 999px;
    background: var(--md-sys-color-primary);
    color: #0d1117;
    font-weight: 600;
    box-shadow: var(--md-elevation-1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-button:hover,
.cta-button:focus {
    transform: translateY(-2px);
    box-shadow: var(--md-elevation-2);
}

.hero-offset {
    height: 96px;
}

.main-shell {
    width: var(--container-width);
    margin: 0 auto;
    padding-bottom: 8rem;
}

.section {
    margin: 4rem 0;
}

.section__title {
    font-size: clamp(2.1rem, 4vw, 3rem);
    margin-bottom: 1rem;
    font-weight: 600;
}

.section__subtitle {
    color: var(--md-sys-color-on-surface-variant);
    max-width: 60ch;
    margin-bottom: 2rem;
}

.card-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
    background: var(--md-sys-color-surface-variant);
    border-radius: var(--md-radius-medium);
    padding: 2rem;
    box-shadow: var(--md-elevation-1);
    border: 1px solid rgba(255, 255, 255, 0.04);
    position: relative;
    overflow: hidden;
}

.card h3 {
    margin-top: 0;
    margin-bottom: 0.6rem;
    font-size: 1.3rem;
}

.card p {
    margin-top: 0;
    margin-bottom: 1.25rem;
    color: var(--md-sys-color-on-surface-variant);
}

.card__icon {
    width: 3rem;
    height: 3rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(3, 169, 244, 0.12);
    color: var(--md-sys-color-primary);
    margin-bottom: 1rem;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.tag-list li {
    padding: 0.35rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--md-sys-color-on-surface-variant);
}

.hero {
    display: grid;
    gap: 2rem;
    align-items: center;
    padding-top: 4rem;
    margin-bottom: 4rem;
}

.hero__title {
    font-size: clamp(2.8rem, 5vw, 4rem);
    margin: 0;
    font-weight: 700;
}

.hero__lede {
    color: var(--md-sys-color-on-surface-variant);
    font-size: 1.1rem;
    line-height: 1.7;
    max-width: 65ch;
}

.hero__actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.9rem;
    border-radius: 999px;
    background: rgba(79, 195, 247, 0.15);
    color: var(--md-sys-color-secondary);
    font-weight: 500;
}

.media-card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2rem;
    border-radius: var(--md-radius-large);
    background: linear-gradient(150deg, rgba(3, 169, 244, 0.18), rgba(3, 169, 244, 0.05));
    border: 1px solid rgba(3, 169, 244, 0.2);
}

.media-card strong {
    font-size: 1.1rem;
}

.highlight-card {
    border: 1px solid rgba(79, 195, 247, 0.6);
    box-shadow: 0 20px 40px rgba(3, 169, 244, 0.25);
}

.pricing-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.pricing-card {
    padding: 2rem;
    border-radius: var(--md-radius-medium);
    background: var(--md-sys-color-surface-variant);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: var(--md-elevation-1);
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.pricing-card strong {
    font-size: 2rem;
}

.pricing-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.75rem;
}

.pricing-card li {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
    color: var(--md-sys-color-on-surface-variant);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: var(--md-radius-medium);
    overflow: hidden;
    box-shadow: var(--md-elevation-1);
}

.data-table thead {
    background: rgba(3, 169, 244, 0.15);
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.status-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.8rem;
    border-radius: 999px;
    font-size: 0.8rem;
}

.status-chip.is-open {
    background: rgba(3, 169, 244, 0.2);
    color: var(--md-sys-color-primary);
}

.status-chip.is-paid {
    background: rgba(79, 195, 247, 0.2);
    color: var(--md-sys-color-secondary);
}

.status-chip.is-overdue {
    background: rgba(207, 102, 121, 0.2);
    color: var(--md-sys-color-error);
}

.contact-form {
    display: grid;
    gap: 1rem;
    max-width: 600px;
}

.contact-form label {
    display: grid;
    gap: 0.5rem;
    font-weight: 500;
}

.text-field {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--md-radius-small);
    padding: 0.85rem 1rem;
    color: var(--md-sys-color-on-surface);
}

.text-field:focus {
    outline: 2px solid rgba(3, 169, 244, 0.5);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.6rem;
    border-radius: 999px;
    border: none;
    background: var(--md-sys-color-primary);
    color: #0d1117;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--md-elevation-1);
}

.btn-primary:hover,
.btn-primary:focus {
    box-shadow: var(--md-elevation-2);
}

.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--md-radius-small);
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(79, 195, 247, 0.1);
    color: var(--md-sys-color-secondary);
}

.alert.is-error {
    background: rgba(207, 102, 121, 0.15);
    color: var(--md-sys-color-error);
}

.site-footer {
    background: #1a1a1a;
    padding: 4rem 0 2.5rem;
}

.site-footer__inner {
    width: var(--container-width);
    margin: 0 auto 2rem;
    display: grid;
    gap: 2.5rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.site-footer__title {
    margin-top: 0;
    margin-bottom: 0.75rem;
}

.site-footer__text {
    color: var(--md-sys-color-on-surface-variant);
    max-width: 50ch;
}

.contact-list {
    list-style: none;
    margin: 1rem 0 0;
    padding: 0;
    display: grid;
    gap: 0.5rem;
}

.contact-list li {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    color: var(--md-sys-color-on-surface-variant);
}

.footer-nav h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.footer-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.5rem;
}

.site-footer__note {
    text-align: center;
    color: var(--md-sys-color-on-surface-variant);
    margin: 0;
}

.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 64px;
    height: 64px;
    border-radius: 32px;
    display: grid;
    place-content: center;
    background: var(--md-sys-color-primary);
    color: #0d1117;
    box-shadow: var(--md-elevation-2);
    transition: transform 0.3s ease;
}

.fab:hover,
.fab:focus {
    transform: translateY(-4px) scale(1.02);
}

@media (max-width: 960px) {
    .app-bar__inner {
        padding: 0.75rem 0;
    }

    .nav {
        position: fixed;
        inset: 80px 1.5rem auto 1.5rem;
        background: rgba(33, 33, 33, 0.98);
        border-radius: var(--md-radius-medium);
        padding: 1.5rem;
        box-shadow: var(--md-elevation-2);
        transform-origin: top right;
        transform: scale(0.95);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease, transform 0.2s ease;
    }

    .nav.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: scale(1);
    }

    .nav ul {
        flex-direction: column;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .cta-button {
        display: none;
    }

    .hero {
        padding-top: 2rem;
    }
}

@media (max-width: 720px) {
    .hero-offset {
        height: 88px;
    }

    .main-shell {
        padding-bottom: 6rem;
    }

    .fab {
        bottom: 1.5rem;
        right: 1.5rem;
    }
}