/* =========================================================================
   GCA Mobilité — Design System
   Source de vérité visuelle. Ne pas modifier sans validation.
   ========================================================================= */

:root {
    /* Couleurs IKEA verrouillées (CLAUDE.md §4) */
    --gca-blue: #0058A3;
    --gca-blue-900: #00305B;
    --gca-blue-800: #003F77;
    --gca-blue-700: #00498C;
    --gca-blue-100: #E6F1FA;

    --gca-yellow: #FFDA1A;
    --gca-yellow-100: #FFF6BF;

    --gca-cream-base: #FAF8F3;
    --gca-cream-soft: #F4F0E7;

    --gca-white: #FFFFFF;
    --gca-border: #D8D1C3;
    --gca-text: #17202A;
    --gca-muted: #4A5260;

    /* Focus bleu profond — couleurs IKEA only.
       Ratio crème 13:1, blanc 9:1, jaune 5.3:1 — conforme WCAG 1.4.11 sur tous fonds. */
    --gca-focus: var(--gca-blue-900);

    /* Typographies */
    --font-display: "EB Garamond", Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;
    --font-body: "Source Sans 3", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    /* Élévations */
    --shadow-soft: 0 18px 45px rgba(0, 48, 91, .12);
    --shadow-card: 0 8px 26px rgba(0, 48, 91, .07);

    /* Géométrie */
    --radius: 8px;
    --radius-card: 16px;

    /* Espacement */
    --space-section: clamp(4rem, 8vw, 7rem);
}

/* ---------- Reset / base ---------- */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--gca-cream-base);
    color: var(--gca-text);
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.7;
    text-rendering: optimizeLegibility;
}

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

a {
    color: var(--gca-blue-700);
    text-decoration: underline;
    text-decoration-thickness: 1.5px;
    text-underline-offset: .22em;
}

a:hover {
    color: var(--gca-blue-900);
    text-decoration-thickness: 2px;
}

/* ---------- A11Y ---------- */

:focus-visible {
    outline: 3px solid var(--gca-focus);
    outline-offset: 4px;
}

.skip-link {
    position: fixed;
    left: 1rem;
    top: 1rem;
    z-index: 100;
    transform: translateY(-180%);
    background: var(--gca-blue-900);
    color: var(--gca-white);
    padding: .75rem 1rem;
    border-radius: var(--radius);
}

.skip-link:focus {
    transform: translateY(0);
}

/* ---------- Layout primitives ---------- */

.container {
    width: min(1120px, calc(100% - 32px));
    margin-inline: auto;
}

.narrow {
    width: min(820px, calc(100% - 32px));
    margin-inline: auto;
}

/* ---------- Typographie ---------- */

h1,
h2,
h3 {
    margin: 0;
    color: var(--gca-blue-900);
    font-family: var(--font-display);
    line-height: 1.05;
    letter-spacing: 0;
}

h1 {
    max-width: 760px;
    font-size: clamp(2rem, 4.5vw, 3.6rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3.4rem);
}

h3 {
    font-size: 1.55rem;
}

p {
    margin: 1rem 0 0;
}

/* ---------- Boutons ---------- */

.button {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 2px solid transparent;
    border-radius: var(--radius);
    padding: .78rem 1.15rem;
    font-weight: 800;
    line-height: 1.1;
    text-decoration: none;
}

.button-primary {
    background: var(--gca-yellow);
    color: var(--gca-blue-900);
}

.button-primary:hover {
    background: var(--gca-yellow-100);
    color: var(--gca-blue-900);
}

.button-secondary {
    background: var(--gca-blue);
    color: var(--gca-white);
}

.button-secondary:hover {
    background: var(--gca-blue-900);
    color: var(--gca-white);
}

.button-on-blue {
    background: var(--gca-yellow);
    color: var(--gca-blue-900);
    margin-top: 1.4rem;
}

/* ---------- Cards (radius 16px — CLAUDE.md §4) ---------- */

.card {
    border: 1px solid var(--gca-border);
    border-radius: var(--radius-card);
    background: var(--gca-white);
    box-shadow: var(--shadow-card);
    padding: 1.3rem;
}

.card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    margin-bottom: 1.1rem;
    background: var(--gca-yellow);
    color: var(--gca-blue-900);
    border-radius: var(--radius);
    font-weight: 900;
}

/* ---------- Hex bullet et check list ---------- */

.hex-bullet {
    display: block;
    width: 34px;
    height: 38px;
    margin-bottom: 1rem;
    background: var(--gca-yellow);
    clip-path: polygon(50% 0, 100% 24%, 100% 76%, 50% 100%, 0 76%, 0 24%);
}

.check-list {
    display: grid;
    gap: .8rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.check-list li {
    position: relative;
    padding-left: 2rem;
}

.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .5rem;
    width: 16px;
    height: 16px;
    background: var(--gca-yellow);
    clip-path: polygon(50% 0, 100% 24%, 100% 76%, 50% 100%, 0 76%, 0 24%);
}

/* ---------- Step list ---------- */

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

.step-list li {
    display: grid;
    gap: .35rem;
    padding: 1.2rem;
    border-left: 6px solid var(--gca-yellow);
    background: rgba(255, 255, 255, .1);
    border-radius: var(--radius);
}

.step-list-light li {
    background: var(--gca-white);
}

.step-list strong {
    color: inherit;
    font-size: 1.18rem;
}

/* ---------- Formulaires ---------- */

label {
    color: var(--gca-blue-900);
    font-weight: 800;
}

input,
textarea {
    width: 100%;
    min-height: 48px;
    border: 2px solid var(--gca-border);
    border-radius: var(--radius);
    background: var(--gca-white);
    color: var(--gca-text);
    font: inherit;
    padding: .75rem .9rem;
}

textarea {
    resize: vertical;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.form-field {
    display: grid;
    gap: .35rem;
}

.form-success {
    margin: 0 0 1rem;
    padding: .9rem 1rem;
    border-left: 6px solid var(--gca-yellow);
    background: var(--gca-blue-100);
    color: var(--gca-blue-900);
    font-weight: 800;
}

/* ---------- Media queries globales ---------- */

@media (max-width: 620px) {
    body {
        font-size: 17px;
    }

    .container,
    .narrow {
        width: min(100% - 24px, 1120px);
    }

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

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
    }
}

@media (forced-colors: active) {
    .button,
    input,
    textarea {
        border: 2px solid ButtonText;
    }

    .hex-bullet,
    .check-list li::before {
        forced-color-adjust: none;
        background: Highlight;
    }
}