/* ==========================================================================
   NetDiag — feuille de style principale
   Mobile-first, vanilla CSS, sans dépendance externe.
   ========================================================================== */

:root {
    --color-primary: #0B5FFF;
    --color-primary-dark: #0842B8;
    --color-accent: #2ED9A6;
    --color-text: #0B2540;
    --color-text-muted: #4A5A6C;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F3F7FC;
    --color-border: #DCE6F2;
    --radius: 12px;
    --container-width: 1080px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--color-primary);
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    border-bottom: 1px solid var(--color-border);
    padding: 14px 0;
}

.site-header__inner {
    display: flex;
    align-items: center;
}

.brand__logo {
    height: 28px;
    width: auto;
}

/* Hero */
.hero {
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    padding: 56px 0 48px;
    text-align: center;
}

.hero__logo {
    margin: 0 auto 24px;
    height: 42px;
    width: auto;
}

.hero__tagline {
    font-size: 1.6rem;
    line-height: 1.3;
    max-width: 560px;
    margin: 0 auto 32px;
    color: var(--color-text);
}

.hero__subtitle {
    font-size: 1.05rem;
    line-height: 1.5;
    max-width: 560px;
    margin: -16px auto 32px;
    color: var(--color-text-muted);
}

.hero__actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.hero__noscript {
    margin-top: 20px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    max-width: 320px;
    padding: 14px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: background-color 0.15s ease, transform 0.05s ease;
}

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

.btn--primary {
    background: var(--color-primary);
    color: #fff;
}

.btn--primary:hover {
    background: var(--color-primary-dark);
}

.btn--secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}

.btn--secondary:hover {
    background: var(--color-bg-alt);
}

.is-hidden {
    display: none !important;
}

.badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: 3px 8px;
    border-radius: 999px;
    line-height: 1.4;
}

.badge--beta {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.platform-item .badge--beta {
    background: #FFF3D6;
    color: #8A5A00;
}

.badge--soon {
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

/* Sections */
.section {
    padding: 48px 0;
}

.section--alt {
    background: var(--color-bg-alt);
}

.section__title {
    text-align: center;
    font-size: 1.5rem;
    margin: 0 0 32px;
}

/* Why NetDiag — cards */
.cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
}

.card__icon {
    font-size: 2rem;
    display: inline-block;
    margin-bottom: 12px;
}

.card__title {
    font-size: 1.1rem;
    margin: 0 0 8px;
}

.card__title .badge {
    vertical-align: middle;
    margin-left: 6px;
}

.card__text {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin: 0;
}

/* How it works — steps */
.steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.step {
    text-align: center;
}

.step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-weight: 700;
    margin-bottom: 12px;
}

.step__title {
    font-size: 1.05rem;
    margin: 0 0 6px;
}

.step__text {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    margin: 0;
    max-width: 320px;
    margin-inline: auto;
}

/* FAQ */
.faq {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq__item {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px 18px;
}

.faq__item summary {
    cursor: pointer;
    font-weight: 600;
}

.faq__item p {
    margin: 10px 0 0;
    color: var(--color-text-muted);
}

/* Platform list */
.platform-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    max-width: 480px;
    margin: 0 auto;
}

.platform-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px 20px;
    text-decoration: none;
    color: var(--color-text);
}

.platform-item:hover {
    border-color: var(--color-primary);
}

.platform-item__name {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.platform-item__cta {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.platform-item--disabled {
    opacity: 0.55;
}

.platform-item--disabled .platform-item__cta {
    color: var(--color-text-muted);
}

/* Call-to-action section (ex. page entreprises) */
.cta {
    max-width: 640px;
    text-align: center;
}

.cta__text {
    color: var(--color-text-muted);
    margin: 0 0 28px;
    font-size: 1rem;
    line-height: 1.55;
}

/* Legal page (politique de confidentialité, conditions, etc.) */
.legal__container {
    max-width: 720px;
}

.legal__eyebrow {
    margin: 0 0 8px;
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.legal__title {
    margin: 0;
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    letter-spacing: -0.02em;
}

.legal__updated {
    margin: 14px 0 32px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.legal__intro {
    margin: 0 0 32px;
    padding: 20px 22px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 1.02rem;
}

.legal__body section {
    margin-top: 28px;
}

.legal__body h2 {
    margin: 0 0 8px;
    font-size: 1.1rem;
    letter-spacing: -0.01em;
}

.legal__body p {
    margin: 0;
    color: var(--color-text-muted);
}

.legal__body p + p {
    margin-top: 12px;
}

.legal__footnote {
    margin-top: 44px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 28px 0;
    background: var(--color-bg-alt);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-bottom: 14px;
    font-size: 0.9rem;
}

.footer-links a {
    text-decoration: none;
}

.footer-links a:hover {
    text-decoration: underline;
}

.footer-links__disabled {
    color: var(--color-text-muted);
    cursor: not-allowed;
}

.footer-copy {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.82rem;
    margin: 0;
}

/* ==========================================================================
   Breakpoints
   ========================================================================== */

@media (min-width: 640px) {
    .hero__actions {
        flex-direction: row;
        justify-content: center;
    }

    .btn {
        width: auto;
    }

    .cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .cards--4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 640px) and (max-width: 899px) {
    .steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .cards--4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 900px) {
    .hero {
        padding: 80px 0 64px;
    }

    .hero__tagline {
        font-size: 2rem;
    }
}