/* Global styles for PackKing China B2B packaging site */

:root {
    --color-bg: #020617;
    --color-surface: #0b1120;
    --color-surface-alt: #020617;
    --color-primary: #1e3a8a;
    --color-primary-soft: #1d4ed8;
    --color-accent: #d4af37;
    --color-text: #e5e7eb;
    --color-text-muted: #9ca3af;
    --color-border: #1f2937;
    --radius-md: 8px;
    --radius-lg: 16px;
    --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.7);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: radial-gradient(circle at top left, #0b1120 0, #020617 45%, #000 100%);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

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

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header & navigation */

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(16px);
    background: linear-gradient(to bottom, rgba(2, 6, 23, 0.92), rgba(2, 6, 23, 0.8), transparent);
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.logo-mark {
    width: 34px;
    height: 34px;
    border-radius: 12px;
    background: radial-gradient(circle at 20% 20%, #d4af37, #a16207);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
    letter-spacing: 0.06em;
    color: #020617;
    box-shadow: 0 0 0 1px rgba(250, 250, 249, 0.2), 0 16px 35px rgba(0, 0, 0, 0.75);
}

.logo-text {
    font-weight: 600;
    letter-spacing: 0.08em;
    font-size: 0.9rem;
    text-transform: uppercase;
    color: #e5e7eb;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.95rem;
}

.main-nav a {
    color: var(--color-text-muted);
    position: relative;
    padding-bottom: 2px;
}

.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--color-accent), var(--color-primary-soft));
    border-radius: 999px;
    transition: width 0.2s ease;
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 18px;
}

.main-nav a.active {
    color: #f9fafb;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: #e5e7eb;
    border-radius: 999px;
}

/* Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.45rem 1rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.18s ease;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(to right, var(--color-primary-soft), var(--color-primary));
    color: #e5e7eb;
    box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.8);
}

.btn-secondary {
    background: rgba(15, 23, 42, 0.85);
    color: #e5e7eb;
    border-color: rgba(148, 163, 184, 0.5);
}

.btn-secondary:hover {
    background: rgba(15, 23, 42, 1);
    border-color: rgba(250, 250, 249, 0.5);
}

.btn-outline {
    border-color: rgba(148, 163, 184, 0.7);
    color: #e5e7eb;
    background: rgba(15, 23, 42, 0.6);
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.lang-toggle {
    min-width: 44px;
    padding: 0.45rem 0.75rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 0.98rem;
}

.btn-sm {
    padding: 0.35rem 0.8rem;
    font-size: 0.8rem;
}

/* Hero section */

.hero {
    padding: 4.5rem 0 3.5rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.8fr) minmax(0, 1.2fr);
    gap: 2.5rem;
    align-items: center;
}

.hero-content h1 {
    font-size: clamp(2.3rem, 3vw, 2.9rem);
    line-height: 1.15;
    margin: 0 0 1rem;
}

.hero-content p {
    margin: 0 0 1.5rem;
    color: var(--color-text-muted);
    max-width: 32rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.hero-highlights {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.hero-highlights li {
    padding-left: 0.9rem;
    position: relative;
}

.hero-highlights li::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: var(--color-accent);
    position: absolute;
    left: 0;
    top: 0.45em;
}

.hero-panel {
    display: flex;
    justify-content: flex-end;
}

.hero-card {
    width: 100%;
    max-width: 420px;
    background: radial-gradient(circle at 0 0, rgba(91, 33, 182, 0.3), transparent 55%),
        radial-gradient(circle at 100% 100%, rgba(212, 175, 55, 0.27), transparent 55%),
        linear-gradient(to bottom right, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98));
    border-radius: 1.25rem;
    padding: 1.5rem 1.7rem 1.4rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(148, 163, 184, 0.35);
}

.hero-card h2 {
    margin-top: 0;
    margin-bottom: 0.6rem;
    font-size: 1.15rem;
}

.hero-card p {
    margin-top: 0;
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.1rem;
    font-size: 0.82rem;
}

.metric-value {
    display: block;
    font-size: 1.4rem;
    font-weight: 600;
    color: #f9fafb;
}

.metric-label {
    color: var(--color-text-muted);
}

/* Sections & layout */

.section {
    padding: 3.5rem 0;
}

.section-alt {
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.98));
}

.section-title {
    font-size: 1.6rem;
    margin: 0 0 1.8rem;
}

.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
    background: rgba(15, 23, 42, 0.95);
    border-radius: var(--radius-lg);
    padding: 1.4rem 1.5rem;
    border: 1px solid rgba(148, 163, 184, 0.4);
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.7);
}

.card h3 {
    margin-top: 0;
    margin-bottom: 0.6rem;
    font-size: 1.05rem;
}

.card p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.92rem;
}

.category-card {
    display: block;
    background: rgba(15, 23, 42, 0.98);
    border-radius: var(--radius-lg);
    padding: 1.3rem 1.4rem;
    border: 1px solid rgba(148, 163, 184, 0.35);
    transition: all 0.18s ease;
}

.category-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 16px 45px rgba(15, 23, 42, 0.9);
    transform: translateY(-2px);
}

.category-card h3 {
    margin-top: 0;
    margin-bottom: 0.4rem;
}

.category-card p {
    margin: 0;
    font-size: 0.94rem;
    color: var(--color-text-muted);
}

.contact-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.8rem;
    padding: 1.5rem 1.7rem;
    border-radius: 1.3rem;
    background: radial-gradient(circle at left, rgba(30, 64, 175, 0.5), transparent),
        linear-gradient(to right, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.96));
    border: 1px solid rgba(148, 163, 184, 0.4);
    box-shadow: var(--shadow-soft);
}

.contact-cta h2 {
    margin-top: 0;
    margin-bottom: 0.6rem;
}

.contact-cta p {
    margin: 0;
    color: var(--color-text-muted);
    max-width: 28rem;
}

.contact-cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

/* Page hero */

.page-hero {
    padding: 3.3rem 0 2.5rem;
}

.page-hero h1 {
    margin: 0 0 0.7rem;
    font-size: 1.9rem;
}

.page-hero p {
    margin: 0 0 1.4rem;
    color: var(--color-text-muted);
    max-width: 34rem;
}

/* Products page */

.section-header-inline {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.6rem;
}

.section-tag {
    font-size: 0.85rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.filter-section {
    padding-top: 0.5rem;
    padding-bottom: 1.5rem;
}

.filter-panel {
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.4);
    border-radius: 1rem;
    padding: 1rem 1.2rem;
}

.filter-panel h2 {
    margin: 0 0 0.9rem;
    font-size: 1.05rem;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
}

.filter-item label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.84rem;
    color: var(--color-text-muted);
}

.filter-item select {
    width: 100%;
    padding: 0.45rem 0.6rem;
    border-radius: 0.65rem;
    border: 1px solid rgba(51, 65, 85, 0.95);
    background: rgba(15, 23, 42, 0.98);
    color: #e5e7eb;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.6rem;
}

.product-card {
    background: rgba(15, 23, 42, 0.98);
    border-radius: 1.1rem;
    overflow: hidden;
    border: 1px solid rgba(148, 163, 184, 0.45);
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.8fr);
}

.product-image {
    min-height: 170px;
    background: radial-gradient(circle at 20% 20%, rgba(212, 175, 55, 0.4), transparent 55%),
        radial-gradient(circle at 80% 80%, rgba(30, 64, 175, 0.6), transparent 55%);
}

.placeholder-image {
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(15, 23, 42, 0.8);
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-size: 0.8rem;
}

.product-body {
    padding: 1.2rem 1.3rem 1.1rem;
}

.product-body h3 {
    margin-top: 0;
    margin-bottom: 0.4rem;
    font-size: 1.02rem;
}

.product-body p {
    margin: 0 0 0.75rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.product-moq {
    margin: 0 0 0.7rem;
    color: var(--color-accent);
    font-size: 0.88rem;
    font-weight: 600;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-bottom: 0.9rem;
}

.tag {
    border: 1px solid rgba(148, 163, 184, 0.5);
    background: rgba(30, 58, 138, 0.18);
    color: #cbd5e1;
    border-radius: 999px;
    padding: 0.18rem 0.58rem;
    font-size: 0.74rem;
}

.filterable-card.is-hidden {
    display: none;
}

.catalog-section {
    padding-top: 0.6rem;
}

.catalog-shell {
    display: grid;
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    gap: 1.4rem;
    align-items: stretch;
}

.catalog-menu {
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 1rem;
    padding: 1rem;
}

.catalog-menu h3 {
    margin: 0 0 0.8rem;
    font-size: 1rem;
}

.catalog-item {
    width: 100%;
    text-align: left;
    border: none;
    background: transparent;
    color: #cbd5e1;
    padding: 0.52rem 0.35rem;
    border-radius: 0.55rem;
    cursor: pointer;
    font-size: 0.92rem;
}

.catalog-item:hover,
.catalog-item.active {
    background: rgba(30, 64, 175, 0.2);
    color: #f8fafc;
}

.catalog-showcase {
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 1rem;
    padding: 0.9rem;
}

.catalog-image {
    min-height: 280px;
    border-radius: 0.8rem;
    margin-bottom: 0.8rem;
}

.catalog-caption h3 {
    margin: 0 0 0.45rem;
}

.catalog-caption p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.92rem;
}

.whatsapp-float {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 30;
    background: #22c55e;
    color: #052e16;
    font-weight: 700;
    border-radius: 999px;
    padding: 0.68rem 0.95rem;
    box-shadow: 0 16px 35px rgba(15, 23, 42, 0.65);
}

/* About page */

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

.bullet-list {
    padding-left: 1.1rem;
    margin: 0.6rem 0 0;
    color: var(--color-text-muted);
    font-size: 0.94rem;
}

.bullet-list li + li {
    margin-top: 0.2rem;
}

/* Contact page */

.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.8fr);
    gap: 2rem;
}

.contact-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
    font-size: 0.94rem;
}

.contact-list li + li {
    margin-top: 0.3rem;
}

.contact-form {
    background: rgba(15, 23, 42, 0.98);
    border-radius: 1.1rem;
    padding: 1.3rem 1.4rem 1.4rem;
    border: 1px solid rgba(148, 163, 184, 0.5);
}

.contact-grid .card + .card {
    margin-top: 0.9rem;
}

.form-row {
    margin-bottom: 0.9rem;
}

.form-row label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.form-row input,
.form-row select,
.form-row textarea {
    width: 100%;
    padding: 0.5rem 0.6rem;
    border-radius: 0.65rem;
    border: 1px solid rgba(51, 65, 85, 0.9);
    background: rgba(15, 23, 42, 0.98);
    color: #e5e7eb;
    font-size: 0.9rem;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
    outline: 1px solid var(--color-primary-soft);
    border-color: var(--color-primary-soft);
}

.form-note {
    margin: 0 0 0.8rem;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* Footer */

.site-footer {
    border-top: 1px solid rgba(31, 41, 55, 0.9);
    padding: 2.2rem 0 1.8rem;
    margin-top: 1.5rem;
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.96), #020617);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1.4fr 1.2fr;
    gap: 1.8rem;
    margin-bottom: 1.3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
}

.footer-text {
    margin: 0;
    font-size: 0.86rem;
    color: var(--color-text-muted);
}

.footer-list {
    list-style: none;
    padding: 0;
    margin: 0.4rem 0 0;
    font-size: 0.86rem;
    color: var(--color-text-muted);
}

.footer-list li + li {
    margin-top: 0.25rem;
}

.footer-bottom {
    border-top: 1px solid rgba(31, 41, 55, 0.9);
    padding-top: 0.8rem;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-align: center;
}

/* Responsive */

@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero-panel {
        justify-content: flex-start;
    }

    .grid-3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .grid-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .product-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .filter-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .catalog-shell {
        grid-template-columns: minmax(0, 1fr);
    }

    .catalog-image {
        min-height: 220px;
    }

    .product-card {
        grid-template-columns: minmax(0, 1fr);
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .contact-cta {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-grid {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }
}

@media (max-width: 640px) {
    .header-inner {
        padding: 0.6rem 0;
    }

    .main-nav {
        position: fixed;
        inset: 3.2rem 1.2rem auto;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
        padding: 0.9rem 1rem;
        border-radius: 0.9rem;
        background: rgba(15, 23, 42, 0.98);
        border: 1px solid rgba(148, 163, 184, 0.4);
        transform-origin: top right;
        transform: scale(0.9);
        opacity: 0;
        pointer-events: none;
        transition: all 0.18s ease;
    }

    .main-nav.open {
        opacity: 1;
        pointer-events: auto;
        transform: scale(1);
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: 3.4rem;
    }

    .grid-3 {
        grid-template-columns: minmax(0, 1fr);
    }

    .grid-4 {
        grid-template-columns: minmax(0, 1fr);
    }

    .contact-cta {
        padding: 1.2rem 1.2rem;
    }

    .footer-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}