/* ═══════════════════════════════════════════════════════════
   HoneyBee Learning — Responsive System
   Breakpoints:
     ≤ 480px   → Mobile (phones)
     481–768px → Tablet (portrait)
     769–1024px → Small Desktop / tablet landscape
     1025–1279px → Desktop
     ≥ 1280px  → Wide Desktop
     ≥ 1600px  → Ultra-Wide
   ═══════════════════════════════════════════════════════════ */

/* ─── HAMBURGER BUTTON ─── */
.nav-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: background 0.2s;
    width: 40px;
    height: 40px;
}

.hamburger:hover {
    background: var(--green-pale);
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2.5px;
    background: var(--green);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.hamburger.open span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.open span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* ─── DRAWER OVERLAY ─── */
.nav-drawer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 98;
    background: rgba(0, 0, 0, 0.38);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

.nav-drawer-overlay.open {
    display: block;
}

/* ═══════════════════════════════════════════════
   SHARED TABLET + MOBILE  (≤ 768px)
   ═══════════════════════════════════════════════ */
@media (max-width: 768px) {

    /* Show hamburger */
    .hamburger {
        display: flex;
    }

    /* Slide-in drawer */
    .nav-links {
        position: fixed;
        top: 0;
        right: -280px;
        width: 260px;
        height: 100dvh;
        background: #ffffff;
        z-index: 99;
        flex-direction: column;
        padding: 80px 20px 30px;
        gap: 2px;
        box-shadow: -6px 0 32px rgba(0, 0, 0, 0.15);
        transition: right 0.32s cubic-bezier(0.4, 0, 0.2, 1);
        display: flex;
        list-style: none;
        overflow-y: auto;
    }

    .nav-links.open {
        right: 0;
    }

    .nav-links li a {
        font-size: 1.05rem;
        padding: 13px 16px;
        border-radius: 12px;
        display: block;
        font-weight: 700;
        color: var(--text);
        text-decoration: none;
        transition: background 0.2s, color 0.2s;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
        background: var(--green-pale);
        color: var(--green);
    }

    /* Bottom-sheet modals */
    .dmodal-overlay {
        align-items: flex-end;
        padding: 0;
    }

    .dmodal {
        border-radius: 24px 24px 0 0;
        max-height: 95dvh;
        width: 100%;
    }

    .modal-overlay {
        align-items: flex-end;
        padding: 0;
    }

    .modal {
        border-radius: 24px 24px 0 0;
        max-height: 96dvh;
        width: 100%;
    }
}

/* ═══════════════════════════════════════════════
   TABLET  481px – 768px
   ═══════════════════════════════════════════════ */
@media (min-width: 481px) and (max-width: 768px) {
    nav {
        padding: 10px 5%;
    }

    .nav-cta {
        font-size: 0.87rem;
        padding: 9px 16px;
    }

    .hero {
        padding: 92px 5% 78px;
        gap: 28px;
    }

    .hero h1 {
        font-size: 2.35rem;
    }

    .hero-desc {
        font-size: 0.98rem;
    }

    section {
        padding: 52px 5%;
    }

    .section-title {
        font-size: 2rem;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .learning-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }

    .how-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .testi-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stream-tab {
        padding: 10px 18px;
        font-size: 0.88rem;
    }

    .filter-btn {
        font-size: 0.85rem;
    }

    .contact-card {
        min-width: 140px;
        padding: 18px 20px;
    }

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

/* ═══════════════════════════════════════════════
   MOBILE  ≤ 480px
   ═══════════════════════════════════════════════ */
@media (max-width: 480px) {
    nav {
        padding: 8px 4%;
        gap: 8px;
    }

    .nav-logo img {
        height: 36px !important;
    }

    .nav-logo-text {
        font-size: 1.2rem;
    }

    .nav-logo-sub {
        font-size: 0.62rem;
    }

    .nav-cta {
        padding: 8px 12px;
        font-size: 0.78rem;
        white-space: nowrap;
    }

    /* Hero — stack vertically */
    .hero {
        flex-direction: column;
        padding: 76px 4% 66px;
        gap: 18px;
        min-height: auto;
        align-items: flex-start;
    }

    .hero h1 {
        font-size: 1.85rem;
    }

    .hero-desc {
        font-size: 0.91rem;
    }

    .hero-badge {
        font-size: 0.76rem;
        padding: 5px 12px;
    }

    .hero-btns {
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
        padding: 12px 20px;
        font-size: 0.93rem;
    }

    .hero-stats {
        gap: 12px;
    }

    .stat-num {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.66rem;
    }

    .banner-strip {
        font-size: 0.75rem;
        padding: 8px 4%;
    }

    .banner-strip span {
        margin: 0 8px;
    }

    section {
        padding: 40px 4%;
    }

    .section-title {
        font-size: 1.55rem;
    }

    .section-sub {
        font-size: 0.87rem;
        margin-bottom: 28px;
    }

    .section-tag {
        font-size: 0.7rem;
    }

    /* Tabs — horizontal scroll on small phones */
    .stream-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }

    .stream-tabs::-webkit-scrollbar {
        display: none;
    }

    .stream-tab {
        white-space: nowrap;
        flex-shrink: 0;
        padding: 9px 12px;
        font-size: 0.81rem;
    }

    /* Single-column grids on phone */
    .products-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .learning-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .testi-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .how-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    /* Scrollable filter bar */
    .filter-bar {
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
        padding-bottom: 4px;
        -webkit-overflow-scrolling: touch;
    }

    .filter-bar::-webkit-scrollbar {
        display: none;
    }

    .filter-btn {
        white-space: nowrap;
        flex-shrink: 0;
        font-size: 0.8rem;
        padding: 6px 13px;
    }

    /* Learning cards */
    .lcard-img-wrap {
        height: 185px;
    }

    .lcard-title {
        font-size: 1rem;
    }

    /* How-it-works cards */
    .how-card {
        padding: 20px 12px;
    }

    .how-icon {
        font-size: 1.9rem;
        margin-bottom: 8px;
    }

    .how-card h3 {
        font-size: 0.92rem;
    }

    .how-card p {
        font-size: 0.78rem;
    }

    /* Product cards */
    .card-header {
        padding: 18px 16px 12px;
    }

    .card-name {
        font-size: 1.1rem;
    }

    .card-body {
        padding: 12px 16px 16px;
    }

    .card-items li {
        font-size: 0.82rem;
    }

    /* Contact — list layout */
    .contact-cards {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .contact-card {
        min-width: unset;
        padding: 14px 18px;
        display: flex;
        align-items: center;
        gap: 14px;
        text-align: left;
        border-radius: 16px;
    }

    .contact-icon {
        font-size: 1.5rem;
        margin-bottom: 0;
    }

    .contact-label {
        font-size: 0.66rem;
    }

    .contact-value {
        font-size: 1rem;
    }

    /* Detail modal */
    .dmodal-img img {
        max-height: 200px;
    }

    .dmodal-body {
        padding: 14px 18px 28px;
    }

    .dmodal-title {
        font-size: 1.2rem;
    }

    .dmodal-price {
        font-size: 1.55rem;
    }

    .dmodal-btn {
        font-size: 0.95rem;
        padding: 12px;
    }

    /* Order modal */
    .modal-header {
        padding: 18px 18px 12px;
        border-radius: 24px 24px 0 0;
    }

    .modal-body {
        padding: 14px 18px 22px;
    }

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

    .candy-choice {
        flex-wrap: wrap;
    }

    .candy-btn {
        min-width: calc(50% - 4px);
    }

    footer {
        padding: 18px 4%;
        font-size: 0.8rem;
    }
}

/* ═══════════════════════════════════════════════
   SMALL DESKTOP / TABLET LANDSCAPE  769px – 1024px
   ═══════════════════════════════════════════════ */
@media (min-width: 769px) and (max-width: 1024px) {
    .hero {
        padding: 100px 5% 82px;
        gap: 32px;
    }

    .hero h1 {
        font-size: 2.7rem;
    }

    .hero-right {
        max-width: 360px;
    }

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

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

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

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

    .section-title {
        font-size: 2.2rem;
    }
}

/* ═══════════════════════════════════════════════
   WIDE DESKTOP  ≥ 1280px
   ═══════════════════════════════════════════════ */
@media (min-width: 1280px) {
    nav {
        padding: 12px 7%;
    }

    section {
        padding: 80px 7%;
    }

    .hero {
        padding: 110px 7% 90px;
    }

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

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

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

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

/* ═══════════════════════════════════════════════
   ULTRA-WIDE  ≥ 1600px
   ═══════════════════════════════════════════════ */
@media (min-width: 1600px) {
    nav {
        padding: 12px 10%;
    }

    section {
        padding: 90px 10%;
    }

    .hero {
        padding: 120px 10% 100px;
    }

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

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