/*
 * mobile.css — Responsive overrides for KiraCarbon.com
 * Loaded AFTER style.css via a separate <link> tag.
 * Reference: Samsung Galaxy S24 Ultra (~412px CSS portrait)
 */

/* ── Hamburger: hidden on desktop ─────────────────────────────── */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 300;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 4px 0;
    background: var(--text-main);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }


/* ── Mobile breakpoint ────────────────────────────────────────── */
@media (max-width: 768px) {

    /* Slim, compact navbar */
    .nav-container {
        padding: 0.5rem 1rem;
        position: relative;
    }

    /* Show hamburger on the left */
    .nav-toggle {
        display: block;
        order: -1;          /* flex order: first item = left side */
    }

    /* KiraCarbon text stays, slightly smaller */
    .logo {
        font-size: 1.35rem;
        flex: 1;            /* push to fill space */
        margin-left: 0.5rem;
    }

    /* HIDE the 3 nav tabs from the header bar entirely */
    .nav-links {
        display: none !important;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(12, 17, 24, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--glass-border);
        padding: 0.3rem 0;
        z-index: 200;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    }

    /* Only show when hamburger is toggled open */
    .nav-links.open {
        display: flex !important;
    }

    .nav-links li a {
        display: block;
        padding: 0.7rem 1.25rem;
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--text-muted);
        transition: color 0.2s, background 0.2s;
    }

    .nav-links li a:hover,
    .nav-links li a:active {
        color: var(--text-main);
        background: rgba(255, 255, 255, 0.05);
    }

    /* ── Hero ── */
    main {
        padding: 4.5rem 1rem 2.5rem;
    }

    .hero {
        padding: 2rem 0 1.5rem;
    }

    .hero h2 {
        font-size: 2.2rem;
        line-height: 1.2;
    }

    .hero h2 br {
        display: none;
    }

    .hero p {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 0.7rem;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        text-align: center;
        padding: 0.85rem 1.5rem;
    }

    /* ── Cards ── */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
        margin-top: 1.5rem;
    }

    .glass-card {
        padding: 1.3rem 1.1rem;
        border-radius: 14px;
    }

    .glass-card:hover {
        transform: none;       /* disable hover lift on touch */
    }

    .card-icon { font-size: 2rem; }
    .glass-card h3 { font-size: 1.2rem; }

    /* ── Footer ── */
    .footer-inner {
        flex-direction: column;
        text-align: center;
        gap: 0.3rem;
        padding: 1rem;
    }

    /* ── Blobs: smaller on mobile ── */
    .glow-blob {
        width: 250px;
        height: 250px;
        filter: blur(40px);
    }

    /* ── Form inputs: touch-friendly ── */
    .sim-form input {
        padding: 0.85rem 1rem;
        font-size: 1rem;
    }
}