/* ═══════════════════════════════════════════════════════════
   SMARTSEWER.COM — Design System
   Industrial precision: Helvetica, sharp edges,
   black/white/orange/blue, dense, full-bleed, mega-footer
   ═══════════════════════════════════════════════════════════ */

/* ─── CSS Variables ─── */
:root {
    --black: #000000;
    --dark-gray: #111111;
    --mid-gray: #1a1a1a;
    --card-bg: #141414;
    --border: #2a2a2a;
    --border-light: #333333;
    --white: #ffffff;
    --off-white: #f5f5f5;
    --gray: #888888;
    --dim-gray: #555555;
    --orange: #ff6b2b;
    --orange-hover: #ff8548;
    --blue: #0057ff;
    --blue-hover: #0047d4;
    --green: #22c55e;
    --red: #ef4444;

    --font-main: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', monospace;

    --topbar-height: 84px;
    --max-width: 1200px;
}

/* ─── Reset ─── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-main);
    background: var(--black);
    color: var(--white);
    line-height: 1.5;
    -webkit-user-select: text;
    user-select: text;
    cursor: default;
    overflow-x: hidden;
}

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

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

table {
    width: 100%;
    border-collapse: collapse;
}

/* ─── Typography ─── */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.05;
}

h1 { font-size: clamp(36px, 6vw, 96px); }
h2 { font-size: clamp(28px, 4vw, 44px); }
h3 { font-size: clamp(20px, 2.5vw, 28px); }
h4 { font-size: 18px; }

.mono { font-family: var(--font-mono); }

.eyebrow {
    font-size: 11px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.text-gray { color: var(--gray); }
.text-dim { color: var(--dim-gray); }
.text-orange { color: var(--orange); }
.text-green { color: var(--green); }
.text-blue { color: var(--blue); }

/* ─── Layout ─── */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 64px;
}

.section {
    padding: 80px 64px;
}

.section--dark {
    background: var(--dark-gray);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }

/* ─── Top Bar ─── */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--black);
    border-bottom: 1px solid var(--border);
}

.topbar__micro {
    background: var(--dark-gray);
    border-bottom: 1px solid var(--border);
    padding: 0 32px;
    display: flex;
    align-items: center;
    height: 32px;
    justify-content: space-between;
    overflow: hidden;
}

.topbar__micro-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.topbar__micro-link {
    font-size: 11px;
    color: var(--gray);
    cursor: pointer;
    white-space: nowrap;
    letter-spacing: 0.01em;
    transition: color 0.15s;
}

.topbar__micro-link:hover {
    color: var(--white);
}

.topbar__micro-tagline {
    font-size: 11px;
    color: var(--dim-gray);
    white-space: nowrap;
}

.topbar__main {
    padding: 0 32px;
    display: flex;
    align-items: center;
    height: 52px;
    justify-content: space-between;
}

.topbar__logo {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.topbar__logo-text {
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.03em;
    color: var(--white);
}

.topbar__logo-tld {
    font-size: 11px;
    color: var(--dim-gray);
    margin-top: 2px;
}

.topbar__nav {
    display: flex;
    gap: 0;
    align-items: center;
}

.topbar__nav-item {
    padding: 16px 18px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray);
    letter-spacing: 0.01em;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
}

.topbar__nav-item:hover,
.topbar__nav-item--active {
    color: var(--white);
}

.topbar__nav-item--active {
    border-bottom-color: var(--orange);
}

.topbar__search-toggle {
    padding: 8px 16px;
    cursor: pointer;
    color: var(--gray);
    font-size: 14px;
    transition: color 0.15s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.topbar__search-toggle:hover {
    color: var(--white);
}

/* ─── Search Overlay ─── */
.search-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.92);
    display: none;
    flex-direction: column;
    align-items: center;
    padding-top: 120px;
}

.search-overlay--open {
    display: flex;
}

.search-overlay__input {
    width: 100%;
    max-width: 700px;
    background: var(--dark-gray);
    border: 1px solid var(--border-light);
    color: var(--white);
    font-family: var(--font-main);
    font-size: 24px;
    font-weight: 500;
    padding: 20px 28px;
    outline: none;
    letter-spacing: -0.01em;
}

.search-overlay__input::placeholder {
    color: var(--dim-gray);
}

.search-overlay__results {
    width: 100%;
    max-width: 700px;
    margin-top: 8px;
    max-height: 60vh;
    overflow-y: auto;
}

.search-overlay__close {
    position: absolute;
    top: 40px;
    right: 40px;
    font-size: 24px;
    color: var(--gray);
    cursor: pointer;
    padding: 8px;
    transition: color 0.15s;
}

.search-overlay__close:hover {
    color: var(--white);
}

.search-result {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.15s;
}

.search-result:hover {
    background: var(--mid-gray);
}

.search-result__type {
    font-size: 10px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.search-result__title {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 4px;
}

.search-result__desc {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.5;
}

.search-result mark {
    background: rgba(255, 107, 43, 0.25);
    color: var(--orange);
    padding: 0 2px;
}

/* ─── Hero ─── */
.hero {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 0 64px 80px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--dark-gray) 0%, var(--black) 100%);
}

.hero__grid-overlay {
    position: absolute;
    inset: 0;
    opacity: 0.06;
    background-image:
        linear-gradient(var(--white) 1px, transparent 1px),
        linear-gradient(90deg, var(--white) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
}

.hero__accent-line {
    position: absolute;
    top: 0;
    left: 64px;
    width: 2px;
    height: 60%;
    background: linear-gradient(180deg, var(--orange), transparent);
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.hero__title {
    font-size: clamp(48px, 8vw, 96px);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.04em;
    margin: 0 0 32px;
}

.hero__desc {
    font-size: 18px;
    line-height: 1.7;
    color: var(--gray);
    max-width: 540px;
    margin: 0 0 40px;
}

.hero__actions {
    display: flex;
    gap: 0;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-main);
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    padding: 14px 32px;
    cursor: pointer;
    transition: all 0.15s;
    border: none;
    outline: none;
}

.btn--primary {
    background: var(--orange);
    color: var(--black);
}

.btn--blue {
    background: var(--blue);
    color: var(--white);
}

.btn--blue:hover {
    background: var(--blue-hover);
}

.btn--primary:hover {
    background: var(--orange-hover);
}

.btn--secondary {
    background: transparent;
    color: var(--white);
    border: 1px solid var(--border-light);
}

.btn--secondary:hover {
    border-color: var(--white);
}

.btn--ghost {
    background: transparent;
    color: var(--gray);
    padding: 14px 24px;
}

.btn--ghost:hover {
    color: var(--white);
}

.btn--dark {
    background: var(--black);
    color: var(--white);
}

.btn--small {
    font-size: 11px;
    padding: 8px 16px;
}

/* ─── Stats Band ─── */
.stats-band {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.stat {
    padding: 48px 40px;
    border-right: 1px solid var(--border);
}

.stat:last-child {
    border-right: none;
}

.stat__number {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
}

.stat__unit {
    font-size: 10px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.15em;
    margin-top: 6px;
}

.stat__desc {
    font-size: 13px;
    color: var(--gray);
    margin-top: 10px;
    line-height: 1.5;
}

/* ─── Case Studies Band ─── */
.case-row {
    display: grid;
    grid-template-columns: 180px 1fr auto;
    gap: 32px;
    align-items: center;
    padding: 28px 0;
    border-top: 1px solid var(--border);
}

.case-row__stat {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.case-row__city {
    font-weight: 700;
    font-size: 15px;
}

.case-row__desc {
    font-size: 14px;
    color: var(--gray);
    margin-left: 12px;
}

/* ─── Tags / Badges ─── */
.tag {
    font-size: 10px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.12em;
    border: 1px solid var(--border);
    padding: 4px 12px;
    display: inline-block;
    text-transform: uppercase;
}

.tag--solid {
    background: var(--orange);
    color: var(--black);
    border-color: var(--orange);
}

.tag--green {
    color: var(--green);
    border-color: var(--green);
}

.status-dot {
    font-size: 10px;
    font-weight: 700;
    color: var(--green);
    letter-spacing: 0.08em;
}

/* ─── Section Grid (home cards) ─── */
.section-card {
    padding: 40px 28px;
    cursor: pointer;
    border-right: 1px solid var(--border);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
}

.section-card:last-child {
    border-right: none;
}

.section-card:hover {
    background: var(--mid-gray);
}

.section-card__title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 10px;
}

.section-card__desc {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.6;
    margin-bottom: 20px;
}

.section-card__link {
    font-size: 12px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.02em;
}

/* ─── Page Header ─── */
.page-header {
    padding-top: 112px;
    padding-bottom: 0;
}

.page-header__desc {
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 48px;
    max-width: 600px;
}

/* ─── Tables ─── */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead tr {
    border-bottom: 2px solid var(--border-light);
}

.data-table th {
    text-align: left;
    padding: 12px 16px 12px 0;
    font-size: 10px;
    font-weight: 700;
    color: var(--dim-gray);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.data-table td {
    padding: 18px 16px 18px 0;
    font-size: 13px;
    color: var(--gray);
}

.data-table tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
}

.data-table tbody tr:hover {
    background: var(--mid-gray);
}

.data-table .vendor-name {
    font-weight: 700;
    font-size: 14px;
    color: var(--white);
}

.data-table .vendor-url {
    font-size: 11px;
    color: var(--dim-gray);
    margin-top: 2px;
}

.data-table .city-name {
    font-weight: 700;
    font-size: 13px;
    color: var(--white);
    white-space: nowrap;
}

.data-table .pop-mono {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--dim-gray);
}

/* ─── Blog List ─── */
.blog-item {
    padding: 28px 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 32px;
    transition: background 0.15s;
}

.blog-item:hover {
    background: var(--mid-gray);
    margin: 0 -20px;
    padding-left: 20px;
    padding-right: 20px;
}

.blog-item__title {
    font-weight: 700;
    font-size: 17px;
    margin-bottom: 6px;
    transition: color 0.15s;
}

.blog-item:hover .blog-item__title {
    color: var(--orange);
}

.blog-item__desc {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.6;
}

.blog-item__tag {
    font-size: 10px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.1em;
    white-space: nowrap;
    padding-top: 4px;
}

.blog-item__meta {
    font-size: 12px;
    color: var(--dim-gray);
    margin-top: 8px;
}

/* ─── Blog Post ─── */
.blog-post {
    padding-top: 112px;
    padding-bottom: 80px;
}

.blog-post__hero-image {
    width: 100%;
    max-width: 740px;
    margin: 0 auto 32px;
    padding: 0 64px;
}

.blog-post__hero-image img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    display: block;
}

@media (max-width: 768px) {
    .blog-post__hero-image {
        padding: 0 24px;
    }
    .blog-post__hero-image img {
        height: 200px;
    }
}

.blog-item__image {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
    margin-bottom: 16px;
}

.blog-post__header {
    max-width: 740px;
    margin: 0 auto;
    padding: 0 64px;
    margin-bottom: 48px;
}

.blog-post__tag {
    font-size: 10px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.blog-post__title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
}

.blog-post__meta {
    font-size: 14px;
    color: var(--dim-gray);
}

.blog-post__body {
    max-width: 740px;
    margin: 0 auto;
    padding: 0 64px;
}

.blog-post__body h2 {
    font-size: 28px;
    margin: 48px 0 16px;
}

.blog-post__body h3 {
    font-size: 22px;
    margin: 36px 0 12px;
}

.blog-post__body p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--gray);
    margin-bottom: 20px;
}

.blog-post__body ul,
.blog-post__body ol {
    font-size: 16px;
    line-height: 1.8;
    color: var(--gray);
    margin-bottom: 20px;
    padding-left: 24px;
}

.blog-post__body li {
    margin-bottom: 8px;
}

.blog-post__body blockquote {
    border-left: 3px solid var(--orange);
    padding-left: 24px;
    margin: 32px 0;
    font-size: 18px;
    line-height: 1.7;
    color: var(--off-white);
    font-style: italic;
}

.blog-post__body a {
    color: var(--orange);
    border-bottom: 1px solid transparent;
    transition: border-color 0.15s;
}

.blog-post__body a:hover {
    border-bottom-color: var(--orange);
}

.blog-post__body .callout {
    background: var(--dark-gray);
    border: 1px solid var(--border);
    padding: 24px 28px;
    margin: 32px 0;
}

.blog-post__body .callout__title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--white);
}

.blog-post__body .callout p {
    margin-bottom: 0;
}

/* ─── Glossary ─── */
.glossary-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 24px;
}

.glossary-item__term {
    font-weight: 700;
    font-size: 15px;
    font-family: var(--font-mono);
}

.glossary-item__full {
    font-size: 12px;
    color: var(--dim-gray);
    margin-right: 8px;
}

.glossary-item__def {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.6;
}

/* ─── Research Items ─── */
.research-item {
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
    display: grid;
    grid-template-columns: 1fr 100px;
    gap: 24px;
}

.research-item__title {
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 4px;
}

.research-item__source {
    font-size: 12px;
    color: var(--dim-gray);
    margin-bottom: 8px;
}

.research-item__desc {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.6;
}

.research-item__tags {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

/* ─── Products ─── */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
}

.product-card {
    padding: 32px 24px;
    border: 1px solid var(--border);
    border-right: none;
    transition: background 0.15s;
    cursor: default;
    user-select: text;
    -webkit-user-select: text;
}

.product-card:nth-child(3n) {
    border-right: 1px solid var(--border);
}

.product-card:hover {
    background: var(--mid-gray);
}

.product-card__category {
    font-size: 10px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.product-card__name {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.product-card__vendor {
    font-size: 12px;
    color: var(--dim-gray);
    margin-bottom: 12px;
}

.product-card__desc {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.5;
    margin-bottom: 16px;
}

.product-card__link {
    font-size: 12px;
    font-weight: 700;
    color: var(--orange);
}

/* ─── Filter Bar ─── */
.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.filter-btn {
    font-family: var(--font-main);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 8px 16px;
    cursor: pointer;
    background: transparent;
    color: var(--gray);
    border: 1px solid var(--border);
    transition: all 0.15s;
}

.filter-btn:hover,
.filter-btn--active {
    color: var(--white);
    border-color: var(--white);
}

.filter-btn--active {
    background: var(--white);
    color: var(--black);
}

/* ─── Interactive Map ─── */
.map-container {
    width: 100%;
    height: 500px;
    background: var(--dark-gray);
    border: 1px solid var(--border);
    margin-bottom: 48px;
    position: relative;
}

.map-container .leaflet-popup-content-wrapper {
    background: var(--dark-gray);
    color: var(--white);
    border: 1px solid var(--border);
    border-radius: 0;
    box-shadow: 0 4px 24px rgba(0,0,0,0.5);
}

.map-container .leaflet-popup-tip {
    background: var(--dark-gray);
}

.map-popup__city {
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 4px;
}

.map-popup__tech {
    font-size: 12px;
    color: var(--gray);
    margin-bottom: 4px;
}

.map-popup__result {
    font-size: 12px;
    color: var(--orange);
    font-weight: 700;
}

.map-popup__link {
    font-size: 11px;
    color: var(--orange);
    margin-top: 8px;
    display: block;
}

/* ─── Advertise Page ─── */
.ad-tier {
    padding: 40px 32px;
    border: 1px solid var(--border);
    transition: border-color 0.15s;
}

.ad-tier:hover {
    border-color: var(--orange);
}

.ad-tier__name {
    font-size: 11px;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.ad-tier__title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.ad-tier__features {
    list-style: none;
    padding: 0;
}

.ad-tier__features li {
    font-size: 13px;
    color: var(--gray);
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}

.ad-tier__features li::before {
    content: "→ ";
    color: var(--orange);
}

/* ─── Ad Slots ─── */
.ad-slot {
    background: var(--dark-gray);
    border: 1px dashed var(--border);
    padding: 16px;
    text-align: center;
    font-size: 11px;
    color: var(--dim-gray);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin: 32px 0;
}

.ad-slot--inline {
    margin: 24px 0;
}

.ad-slot--sidebar {
    margin-bottom: 24px;
}

/* ─── Mega Footer ─── */
.mega-footer {
    background: var(--dark-gray);
    border-top: 1px solid var(--border);
    padding: 64px 64px 40px;
}

.mega-footer__grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
}

.mega-footer__brand-name {
    font-weight: 700;
    font-size: 16px;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.mega-footer__brand-desc {
    font-size: 12px;
    color: var(--dim-gray);
    line-height: 1.6;
    margin-bottom: 24px;
}

.mega-footer__copyright {
    font-size: 12px;
    color: var(--dim-gray);
    margin-bottom: 4px;
}

.mega-footer__socials {
    margin-top: 24px;
    display: flex;
    gap: 16px;
}

.mega-footer__social-link {
    font-size: 11px;
    color: var(--gray);
    cursor: pointer;
    border: 1px solid var(--border);
    padding: 4px 12px;
    transition: all 0.15s;
}

.mega-footer__social-link:hover {
    color: var(--white);
    border-color: var(--white);
}

.mega-footer__col-title {
    font-size: 10px;
    font-weight: 700;
    color: var(--dim-gray);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.mega-footer__link {
    font-size: 13px;
    color: var(--gray);
    margin-bottom: 10px;
    cursor: pointer;
    display: block;
    transition: color 0.15s;
}

.mega-footer__link:hover {
    color: var(--white);
}

/* ─── CTA Band (replaces newsletter) ─── */
.cta-band {
    background: var(--orange);
    padding: 64px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cta-band__title {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--black);
}

.cta-band__desc {
    font-size: 15px;
    color: rgba(0, 0, 0, 0.6);
    margin-top: 8px;
}

/* ─── 404 Page ─── */
.page-404 {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--topbar-height);
}

.page-404__code {
    font-size: 120px;
    font-weight: 700;
    letter-spacing: -0.05em;
    color: var(--border-light);
    line-height: 1;
}

.page-404__message {
    font-size: 18px;
    color: var(--gray);
    margin: 16px 0 32px;
}

/* ─── Featured / Sponsored ─── */
.featured-badge {
    font-size: 9px;
    font-weight: 700;
    color: var(--black);
    background: var(--orange);
    padding: 2px 8px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 8px;
}

/* ─── Responsive ─── */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .stats-band { grid-template-columns: repeat(2, 1fr); }
    .mega-footer__grid { grid-template-columns: repeat(3, 1fr); }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .product-card:nth-child(2n) { border-right: 1px solid var(--border); }
    .product-card:nth-child(3n) { border-right: none; }
}

@media (max-width: 768px) {
    .container { padding: 0 24px; }
    .section { padding: 48px 24px; }
    .hero { padding: 0 24px 48px; }

    .grid-2 { grid-template-columns: 1fr; gap: 32px; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: 1fr; }
    .stats-band { grid-template-columns: 1fr; }

    .stat { border-right: none; border-bottom: 1px solid var(--border); }

    .case-row { grid-template-columns: 1fr; gap: 8px; }
    .case-row__stat { font-size: 32px; }

    .topbar__micro { display: none; }
    .topbar__nav { display: none; }
    .topbar__main { height: 48px; }

    .mega-footer__grid { grid-template-columns: 1fr 1fr; }
    .mega-footer { padding: 40px 24px 24px; }

    .cta-band { flex-direction: column; gap: 24px; padding: 40px 24px; text-align: center; }

    .blog-item { grid-template-columns: 1fr; gap: 8px; }
    .research-item { grid-template-columns: 1fr; gap: 8px; }
    .glossary-item { grid-template-columns: 1fr; gap: 8px; }

    .product-grid { grid-template-columns: 1fr; }
    .product-card { border-right: 1px solid var(--border) !important; }

    .map-container { height: 350px; }

    .page-header { padding-top: 80px; }
    .blog-post { padding-top: 80px; }
    .blog-post__header { padding: 0 24px; }
    .blog-post__body { padding: 0 24px; }

    .data-table { font-size: 12px; }
    .data-table th, .data-table td { padding: 10px 8px 10px 0; }

    .search-overlay { padding-top: 80px; }
    .search-overlay__input { font-size: 18px; margin: 0 16px; max-width: calc(100% - 32px); }
}

@media (max-width: 480px) {
    h1 { font-size: 32px; }
    h2 { font-size: 24px; }
    .hero__desc { font-size: 15px; }
    .hero__actions { flex-direction: column; }
    .hero__actions .btn { width: 100%; justify-content: center; }
    .btn--secondary { border-left: 1px solid var(--border-light); }
}

/* ─── Animations ─── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeInUp 0.5s ease-out forwards;
    opacity: 0;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--black);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dim-gray);
}

/* ─── Mobile Nav ─── */
.mobile-menu-toggle {
    display: none;
    cursor: pointer;
    padding: 8px;
    color: var(--white);
    font-size: 20px;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
        align-items: center;
    }
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 49px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--black);
    z-index: 999;
    padding: 24px;
    flex-direction: column;
    gap: 0;
    overflow-y: auto;
}

.mobile-nav--open {
    display: flex;
}

.mobile-nav__item {
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    font-size: 16px;
    font-weight: 600;
    color: var(--gray);
    cursor: pointer;
    transition: color 0.15s;
}

.mobile-nav__item:hover,
.mobile-nav__item--active {
    color: var(--white);
}

/* ─── Contact Form Modal ─── */
.contact-modal {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.contact-modal--open {
    opacity: 1;
}

.contact-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
}

.contact-modal__panel {
    position: relative;
    background: var(--dark-gray);
    border: 1px solid var(--border);
    padding: 48px;
    width: 100%;
    max-width: 520px;
    z-index: 1;
}

.contact-modal__close {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 20px;
    color: var(--gray);
    cursor: pointer;
    padding: 8px;
    transition: color 0.15s;
}

.contact-modal__close:hover {
    color: var(--white);
}

.contact-modal__title {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 8px;
}

.contact-modal__desc {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 24px;
}

.contact-modal__input {
    width: 100%;
    background: var(--mid-gray);
    border: 1px solid var(--border);
    color: var(--white);
    font-family: var(--font-main);
    font-size: 14px;
    padding: 14px 16px;
    margin-bottom: 12px;
    outline: none;
    transition: border-color 0.15s;
}

.contact-modal__input:focus {
    border-color: var(--blue);
}

.contact-modal__textarea {
    resize: vertical;
    min-height: 80px;
}

.contact-modal__input::placeholder {
    color: var(--dim-gray);
}

@media (max-width: 600px) {
    .contact-modal__panel {
        margin: 16px;
        padding: 32px 24px;
    }
}

/* ─── Blue Accent Utilities ─── */
.eyebrow--blue {
    color: var(--blue);
}

.tag--blue {
    color: var(--blue);
    border-color: var(--blue);
}

.cta-band--blue {
    background: var(--blue);
}

.cta-band--blue .cta-band__title {
    color: var(--white);
}

.cta-band--blue .cta-band__desc {
    color: rgba(255, 255, 255, 0.7);
}

/* ─── Full-bleed Image Section ─── */
.hero-image-section {
    width: 100%;
    height: 360px;
    overflow: hidden;
    position: relative;
}

.hero-image-section img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-image-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 40%, var(--black) 100%);
}