/* ==========================================================================
   CHECKOUT — MOBILE BLUEPRINT MODE
   Tutto confinato in @media max-width: 767.98px.
   Aesthetic: technical / utilitarian, mono accents on red.
   ========================================================================== */

@media (max-width: 767.98px) {
    /* ── 0. Spaziatura per la sticky dock ────────────────────────────────── */
    .checkout-layout {
        padding-bottom: 120px !important;
        display: flex;
        flex-direction: column-reverse; /* sidebar/summary in cima su mobile */
    }

    .checkout-main {
        padding-top: 10px;
        width: 100% !important;
    }

    /* ── 1. Hide default stepper & show stencil meter ───────────────────── */
    .checkout-stepper {
        display: none !important;
    }

    /* ── 2. Form Panels (Blueprint style) ────────────────────────────────── */
    .checkout-step-content {
        width: 100% !important;
        box-sizing: border-box;
        background: linear-gradient(160deg, var(--ca-surface) 0%, var(--ca-surface-2) 100%);
        border: 1px solid var(--ca-line);
        border-radius: var(--ca-radius);
        padding: 20px 16px;
        margin-bottom: 16px;
        position: relative;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }
    
    .checkout-step-content::before {
        /* Red tab marker */
        content: "";
        position: absolute;
        left: -1px;
        top: 20px;
        width: 4px;
        height: 24px;
        background: var(--ca-accent);
        border-radius: 0 4px 4px 0;
    }

    .section-title-sm {
        font-family: var(--ca-sans);
        font-size: 1rem;
        font-weight: 800;
        letter-spacing: 0.02em;
        text-transform: uppercase;
        margin-bottom: 20px;
        color: var(--ca-text);
        padding-bottom: 10px;
        border-bottom: 1px solid var(--ca-line);
    }

    /* ── 3. Sticky Dock (Navigazione) ────────────────────────────────────── */
    .checkout-dock {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 60;
        display: flex;
        align-items: stretch;
        gap: 10px;
        padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
        background: rgba(15,15,20,0.95);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border-top: 1px solid var(--ca-line);
        box-shadow: 0 -8px 28px rgba(0, 0, 0, 0.4);
    }
    .checkout-dock::before {
        content: "";
        position: absolute;
        top: -1px;
        left: 12px;
        width: 32px;
        height: 3px;
        background: var(--ca-accent);
        border-radius: 0 0 2px 2px;
    }

    .checkout-dock .btn {
        min-height: 52px;
        font-family: var(--ca-sans);
        font-size: 0.85rem;
        font-weight: 800;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        border-radius: var(--ca-radius-s);
    }

    .checkout-dock__back {
        flex: 1;
        background: transparent;
        border: 1px solid var(--ca-line);
        color: var(--ca-text-2);
    }
    .checkout-dock__next {
        flex: 2;
        background: linear-gradient(180deg, var(--ca-accent), var(--ca-accent-2));
        color: #ffffff;
        border: none;
        box-shadow: 0 4px 14px rgba(224, 32, 32, 0.3);
    }

    /* ── 4. Form elements restyle for mobile ─────────────────────────────── */
    .checkout-form-grid {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
    .checkout-form-grid.flex {
        display: flex;
        flex-direction: row;
        gap: 12px !important;
    }

    /* ── 5. Sidebar Summary come Accordion ───────────────────────────────── */
    .checkout-sidebar {
        margin-bottom: 20px;
        width: 100% !important;
    }
    .summary-card {
        padding: 16px !important;
        position: relative;
        background: linear-gradient(160deg, rgba(30,30,35,0.8) 0%, rgba(15,15,20,0.9) 100%) !important;
        border: 1px solid var(--ca-line) !important;
        border-radius: var(--ca-radius) !important;
    }
    /* Blueprint corner brackets */
    .summary-card::before,
    .summary-card::after {
        content: "";
        position: absolute;
        width: 14px;
        height: 14px;
        border-color: var(--ca-accent);
        border-style: solid;
        pointer-events: none;
    }
    .summary-card::before { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
    .summary-card::after { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

    .summary-toggle-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: pointer;
    }
    .summary-toggle-header h3 {
        margin: 0 !important;
        padding: 0 !important;
        border: none !important;
        color: var(--ca-text) !important;
    }
    .summary-toggle-header .summary-total-preview {
        font-family: var(--ca-mono);
        font-size: 1.1rem;
        font-weight: 800;
        color: var(--ca-accent);
    }
    .summary-content {
        margin-top: 16px;
        border-top: 1px dashed var(--ca-line);
        padding-top: 16px;
    }
}