/* ============================================================
   Rototech Engineering Systems — Frontend Stylesheet
   Structure:
   1. Design Tokens
   2. Reset & Base
   3. Typography
   4. Layout & Container
   5. Buttons
   6. Header & Navigation
   7. Mega Menu
   8. Mobile Navigation
   9. Footer
   10. Utility Classes
   11. Reveal Animations
   12. Back to Top / WhatsApp FAB / Mobile Sticky Bar
   13. Responsive
   ============================================================ */

/* ────────────────────────────────────────────────────────────
   1. DESIGN TOKENS  (palette matches Rototech logo)
   ──────────────────────────────────────────────────────────── */
:root {
    scroll-behavior: smooth;
    /* Base — Deep Charcoal Navy with Blue Tint */
    --color-navy-950: #0a1120;
    --color-navy-900: #0f172a;
    --color-navy-800: #1e293b;
    --color-navy-700: #334155;

    /* Primary Accent — Logo Red */
    --color-red-700: #b52217;
    --color-red-600: #cc2b1d;
    --color-red-500: #e63224;
    /* exact logo red */
    --color-red-400: #f05242;
    --color-red-300: #f88b80;
    --color-red-glow: rgba(230, 50, 36, 0.28);

    /* Secondary Accent — Logo Sky Blue (ZLD tagline bar) */
    --color-sky-600: #3a9ab8;
    --color-sky-500: #5bb8d4;
    /* exact logo sky blue */
    --color-sky-400: #7ecde5;
    --color-sky-300: #a8dff0;
    --color-sky-glow: rgba(91, 184, 212, 0.25);

    /* CTA — Keep as Amber/Orange (complements red well) */
    --color-amber-600: #c96000;
    --color-amber-500: #e87010;
    --color-amber-400: #f59535;
    --color-amber-glow: rgba(232, 112, 16, 0.35);

    /* Neutrals */
    --color-slate-50: #f8fafc;
    --color-slate-100: #f1f5f9;
    --color-slate-200: #e2e8f0;
    --color-slate-300: #cbd5e1;
    --color-slate-400: #94a3b8;
    --color-slate-500: #64748b;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-white: #ffffff;

    /* Semantic aliases */
    --color-surface: var(--color-navy-900);
    --color-surface-alt: var(--color-navy-800);
    --color-surface-card: rgba(28, 33, 48, 0.75);
    --color-text: var(--color-white);
    --color-text-muted: var(--color-slate-300);
    --color-text-subtle: var(--color-slate-500);
    --color-border: rgba(255, 255, 255, 0.07);
    --color-border-red: rgba(230, 50, 36, 0.3);
    --color-border-sky: rgba(91, 184, 212, 0.28);
    /* backwards-compatible aliases so older CSS keeps working */
    --color-blue-500: var(--color-sky-500);
    --color-blue-400: var(--color-sky-400);
    --color-blue-300: var(--color-sky-300);
    --color-blue-glow: var(--color-sky-glow);
    --color-border-blue: var(--color-border-sky);
    --color-primary: var(--color-red-500);
    --color-cta: var(--color-amber-500);

    /* Typography */
    --font-display: 'Poppins', 'Segoe UI', sans-serif;
    --font-body: 'Inter', 'Segoe UI', sans-serif;

    /* Font Scale */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Shape */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-pill: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.45);
    --shadow-glow: 0 0 32px var(--color-blue-glow);
    --shadow-cta: 0 4px 20px var(--color-amber-glow);
    --shadow-nav: 0 8px 32px rgba(0, 0, 0, 0.5);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-index scale */
    --z-base: 1;
    --z-card: 10;
    --z-sticky: 100;
    --z-header: 200;
    --z-mega: 300;
    --z-mobile: 400;
    --z-overlay: 390;
    --z-fab: 500;

    /* Header height (used for page offset) */
    --header-height: 80px;
}


/* ────────────────────────────────────────────────────────────
   2. RESET & BASE
   ──────────────────────────────────────────────────────────── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-surface);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body.nav-open {
    overflow: hidden;
}

/* Offset fixed header */
.site-main {
    padding-top: var(--header-height);
}

/* Mobile sticky bar offset */
@media (max-width: 767px) {
    body {
        padding-bottom: 72px;
    }
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

ul,
ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

address {
    font-style: normal;
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}


/* ────────────────────────────────────────────────────────────
   3. TYPOGRAPHY
   ──────────────────────────────────────────────────────────── */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

h1 {
    font-size: clamp(2rem, 5vw, var(--text-6xl));
}

h2 {
    font-size: clamp(1.5rem, 3.5vw, var(--text-4xl));
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, var(--text-3xl));
}

h4 {
    font-size: var(--text-xl);
}

h5 {
    font-size: var(--text-lg);
}

h6 {
    font-size: var(--text-base);
}

p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
}

p:last-child {
    margin-bottom: 0;
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-red-400) 0%, var(--color-sky-400) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-amber {
    color: var(--color-amber-400);
}

.section-label {
    display: inline-block;
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-sky-400);
    background: rgba(91, 184, 212, 0.1);
    border: 1px solid var(--color-border-sky);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-pill);
    margin-bottom: var(--space-4);
}

.section-title {
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    max-width: 640px;
}

.section-header .section-subtitle {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}


/* ────────────────────────────────────────────────────────────
   4. LAYOUT & CONTAINER
   ──────────────────────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.container--narrow {
    max-width: 900px;
}

.container--wide {
    max-width: 1440px;
}

.section {
    padding-top: var(--space-20);
    padding-bottom: var(--space-20);
}

.section--sm {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
}

.section--lg {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
}

.section--dark {
    background-color: var(--color-navy-950);
}

.section--alt {
    background-color: var(--color-navy-800);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-header--left {
    text-align: left;
}

.grid {
    display: grid;
    gap: var(--space-6);
}

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

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

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

.flex {
    display: flex;
}

.flex--center {
    align-items: center;
    justify-content: center;
}

.flex--between {
    align-items: center;
    justify-content: space-between;
}

.flex--gap {
    gap: var(--space-4);
}


/* ────────────────────────────────────────────────────────────
   5. BUTTONS
   ──────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1;
    padding: 0.8rem 1.6rem;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: background-color var(--transition-base),
        border-color var(--transition-base),
        color var(--transition-base),
        box-shadow var(--transition-base),
        transform var(--transition-fast);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

/* CTA — Logo Red */
.btn-cta {
    background-color: var(--color-red-500);
    color: var(--color-white);
    border-color: var(--color-red-500);
}

.btn-cta:hover {
    background-color: var(--color-red-400);
    border-color: var(--color-red-400);
    box-shadow: 0 4px 20px var(--color-red-glow);
    color: var(--color-white);
}

/* Primary — Sky Blue */
.btn-primary {
    background-color: var(--color-sky-500);
    color: var(--color-navy-950);
    border-color: var(--color-sky-500);
    font-weight: 700;
}

.btn-primary:hover {
    background-color: var(--color-sky-400);
    border-color: var(--color-sky-400);
    box-shadow: 0 0 24px var(--color-sky-glow);
    color: var(--color-navy-950);
}

/* Secondary — Sky-Blue Outline */
.btn-secondary {
    background-color: transparent;
    color: var(--color-sky-500);
    border-color: var(--color-sky-500);
}

.btn-secondary:hover {
    background-color: var(--color-sky-500);
    color: var(--color-navy-950);
    border-color: var(--color-sky-500);
}

/* Ghost */
.btn-ghost {
    background-color: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-ghost:hover {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.6);
    color: var(--color-white);
}

/* Sizes */
.btn-sm {
    font-size: var(--text-xs);
    padding: 0.5rem 1rem;
}

.btn-lg {
    font-size: var(--text-base);
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
}

.btn-block {
    width: 100%;
}


/* ────────────────────────────────────────────────────────────
   6. HEADER & DESKTOP NAVIGATION
   ──────────────────────────────────────────────────────────── */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    background-color: var(--color-white);
    transition: background-color var(--transition-slow),
        box-shadow var(--transition-slow),
        padding var(--transition-base);
    padding: var(--space-5) 0;
}

.site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    padding: var(--space-3) 0;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

/* Logo */
.header-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
    text-decoration: none;
    background-color: transparent;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.header-logo:hover {
    opacity: 0.85;
    transform: scale(1.02);
}

.header-logo__img {
    display: block;
    height: 66px;
    width: auto;
    max-height: 66px;
    min-width: 160px;
    object-fit: contain;
    object-position: left center;
}

.header-logo__text {
    display: none;
    /* logo image already includes the brand name */
}

/* Main nav */
.main-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.main-nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.main-nav__item {
    position: relative;
}

.main-nav__link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-navy-950);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
    white-space: nowrap;
}

.main-nav__link:hover,
.main-nav__link.active {
    color: var(--color-sky-500);
    background-color: rgba(91, 184, 212, 0.1);
}

.main-nav__arrow {
    font-size: 0.65rem;
    transition: transform var(--transition-base);
}

.main-nav__item.is-open>.main-nav__link .main-nav__arrow {
    transform: rotate(180deg);
}

.main-nav__item.is-open>.mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.main-nav__item--dropdown.is-active>.main-nav__link--has-mega {
    color: var(--color-sky-500);
    background-color: rgba(91, 184, 212, 0.1);
}

/* Header actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: transparent;
    border: none;
    transition: background-color var(--transition-base);
    cursor: pointer;
}

.hamburger:hover {
    background: rgba(0, 0, 0, 0.05);
}

.hamburger__line {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-navy-950);
    border-radius: 2px;
    transition: transform var(--transition-base),
        opacity var(--transition-base);
    transform-origin: center;
}

.hamburger.active .hamburger__line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.hamburger.active .hamburger__line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}


/* ────────────────────────────────────────────────────────────
   7. MEGA MENU  (light theme)
   ──────────────────────────────────────────────────────────── */
.mega-menu {
    position: fixed;
    left: 0;
    right: 0;
    /* top is set dynamically by JS via --mega-top; fallback = header height */
    top: var(--mega-top, var(--header-height));
    background-color: #ffffff;
    border-top: 3px solid var(--color-red-500);
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.14);
    z-index: var(--z-mega);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--transition-base),
        visibility var(--transition-base),
        transform var(--transition-base);
    pointer-events: none;
}

.mega-menu--sm .mega-menu__inner {
    grid-template-columns: repeat(2, 1fr);
}

.mega-menu--sm.mega-menu--single .mega-menu__inner {
    grid-template-columns: 1fr;
    max-width: none;
    padding: var(--space-2) 0;
    gap: 0;
}

.mega-menu.mega-menu--single {
    position: absolute !important;
    left: 0 !important;
    right: auto !important;
    width: max-content !important;
    min-width: 240px;
    top: 100% !important;
    margin-top: 15px;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-red-500);
}


.mega-menu.mega-menu--single::before {
    content: '';
    position: absolute;
    top: -15px;
    left: 0;
    width: 100%;
    height: 15px;
}

.mega-menu.mega-menu--single .mega-menu__col {
    padding: 0;
}

.mega-menu.mega-menu--single .mega-menu__list {
    display: flex;
    flex-direction: column;
}

.mega-menu.mega-menu--single .mega-menu__link {
    padding: var(--space-3) var(--space-6);
    border-radius: 0;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mega-menu.mega-menu--single .mega-menu__link:hover {
    background-color: var(--color-slate-50);
}

.mega-menu__inner {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    padding: var(--space-8) var(--space-6);
}

.mega-menu--products .mega-menu__inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
    padding: var(--space-5) var(--space-5);
    align-items: stretch;
    max-width: min(1440px, 96vw);
    margin-left: auto;
    margin-right: auto;
}

.mega-menu--products .mega-menu__col {
    padding: var(--space-3) var(--space-3) var(--space-3) 0;
}

.mega-menu--products .mega-menu__col:last-child {
    padding-right: 0;
    padding-left: 0;
}

@media (max-width: 1199px) {
    .mega-menu--products .mega-menu__inner {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 767px) {
    .mega-menu--products .mega-menu__inner {
        grid-template-columns: 1fr;
    }
}

.mega-menu__col {
    padding: var(--space-2) 0;
}

.mega-menu__link--img .mega-menu__link-img-wrap {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-navy-100, #f1f5f9);
    border: 1px solid var(--color-border, #e2e8f0);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.mega-menu__link--img .mega-menu__link-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-fast);
}

.mega-menu__link--img:hover .mega-menu__link-img-wrap {
    border-color: var(--color-red-300);
    box-shadow: 0 0 0 2px rgba(230, 50, 36, 0.15);
}

.mega-menu__link--img:hover .mega-menu__link-img {
    transform: scale(1.06);
}

.mega-menu__link--img .mega-menu__link-text {
    flex: 1;
    min-width: 0;
}

.mega-menu__col--highlight {
    background: #fff5f5;
    border: 1px solid rgba(230, 50, 36, 0.15);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    display: flex;
    align-items: center;
}

.mega-menu__heading {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-red-500);
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-2);
    border-bottom: 2px solid rgba(230, 50, 36, 0.15);
}

.mega-menu__heading--spaced {
    margin-top: var(--space-6);
}

.mega-menu--products .mega-menu__list {
    gap: 2px;
}

.mega-menu--products .mega-menu__link--img {
    padding: var(--space-2) var(--space-2);
}

.mega-menu__list {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.mega-menu__list--grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
}

.mega-menu__link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 500;
    color: #2d3748;
    padding: 0.45rem var(--space-3);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast),
        background-color var(--transition-fast),
        padding-left var(--transition-fast);
    text-decoration: none;
}

.mega-menu__link i {
    color: var(--color-sky-500);
    width: 22px;
    font-size: 1.1rem;
    flex-shrink: 0;
    transition: color var(--transition-fast);
}

.mega-menu__link:hover {
    color: var(--color-red-600);
    background-color: rgba(230, 50, 36, 0.06);
    padding-left: var(--space-4);
}

.mega-menu__link:hover i {
    color: var(--color-red-500);
}

.mega-menu__link.active {
    color: var(--color-red-600);
    background-color: rgba(230, 50, 36, 0.1);
}

.mega-menu__link.active i {
    color: var(--color-red-500);
}

/* Promo block inside mega-menu */
.mega-menu__promo {
    text-align: center;
    width: 100%;
}

.mega-menu__promo-icon {
    font-size: 2rem;
    color: var(--color-red-500);
    margin-bottom: var(--space-3);
    display: block;
}

.mega-menu__promo-title {
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: var(--space-2);
}

.mega-menu__promo-text {
    font-size: var(--text-sm);
    color: #4a5568;
    margin-bottom: var(--space-4);
    line-height: 1.6;
}



/* ────────────────────────────────────────────────────────────
   8. MOBILE NAVIGATION
   ──────────────────────────────────────────────────────────── */
.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(5, 13, 26, 0.75);
    backdrop-filter: blur(4px);
    z-index: var(--z-overlay);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mobile-overlay.show {
    display: block;
    opacity: 1;
}

.mobile-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(360px, 90vw);
    background-color: var(--color-white);
    border-left: 1px solid var(--color-border);
    z-index: var(--z-mobile);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.mobile-nav.open {
    transform: translateX(0);
}

.mobile-nav__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.mobile-nav__logo-img {
    display: block;
    height: 42px;
    width: auto;
    max-height: 42px;
    object-fit: contain;
    object-position: left center;
}

.mobile-nav-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: rgba(0, 0, 0, 0.03);
    color: var(--color-text-muted);
    border: 1px solid rgba(0, 0, 0, 0.05);
    font-size: var(--text-base);
    cursor: pointer;
    transition: background-color var(--transition-fast),
        color var(--transition-fast);
}

.mobile-nav-close:hover {
    background-color: rgba(230, 50, 36, 0.1);
    color: var(--color-red-600);
}

.mobile-nav__list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-3) 0;
}

.mobile-nav__item {
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav__item:last-child {
    border-bottom: none;
}

.mobile-nav__link {
    display: block;
    padding: var(--space-4) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-navy-950);
    transition: color var(--transition-fast),
        background-color var(--transition-fast);
}

.mobile-nav__link:hover,
.mobile-nav__link.active {
    color: var(--color-sky-600);
    background-color: rgba(91, 184, 212, 0.08);
}

.mobile-nav__toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-4) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-navy-950);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: color var(--transition-fast),
        background-color var(--transition-fast);
}

.mobile-nav__toggle:hover {
    color: var(--color-red-600);
    background-color: rgba(230, 50, 36, 0.05);
}

.mobile-nav__toggle[aria-expanded="true"],
.mobile-nav__toggle.active {
    color: var(--color-sky-600);
    background-color: rgba(91, 184, 212, 0.05);
}

.mobile-nav__toggle-icon {
    font-size: 0.65rem;
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.mobile-nav__toggle[aria-expanded="true"] .mobile-nav__toggle-icon {
    transform: rotate(180deg);
}

.mobile-nav__sub {
    max-height: 0;
    overflow: hidden;
    background-color: var(--color-slate-50);
    border-top: none;
    border-bottom: none;
    box-shadow: none;
    transition: max-height var(--transition-slow);
}

.mobile-nav__sub.open {
    /* Allow long product lists on small screens */
    max-height: min(70vh, 900px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    border-top: 1px solid rgba(91, 184, 212, 0.1);
    border-bottom: 1px solid rgba(91, 184, 212, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.mobile-nav__sub-link {
    display: block;
    padding: var(--space-3) var(--space-8);
    font-size: var(--text-sm);
    color: var(--color-navy-950);
    transition: color var(--transition-fast),
        padding-left var(--transition-fast),
        background-color var(--transition-fast);
}

.mobile-nav__sub-link:hover {
    color: var(--color-sky-600);
    padding-left: calc(var(--space-8) + var(--space-2));
    background-color: rgba(91, 184, 212, 0.08);
}

.mobile-nav__sub-link.active {
    color: var(--color-sky-400);
    font-weight: 600;
    background-color: rgba(91, 184, 212, 0.12);
}

.mobile-nav__sub-heading {
    padding: var(--space-3) var(--space-6) var(--space-1);
    font-size: var(--text-xs);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-sky-400);
}

.mobile-nav__footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--color-border);
    flex-shrink: 0;
}


/* ────────────────────────────────────────────────────────────
   9. FOOTER
   ──────────────────────────────────────────────────────────── */
.site-footer {
    position: relative;
    background: linear-gradient(180deg, var(--color-navy-900) 0%, var(--color-navy-950) 100%);
    border-top: 1px solid var(--color-border);
}

.footer-accent {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-red-500), var(--color-sky-500));
}

.footer-top {
    padding: var(--space-16) 0 var(--space-12);
    position: relative;
    z-index: 1;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: var(--space-10);
    align-items: start;
}

.footer-logo {
    display: inline-flex;
    margin-bottom: var(--space-4);
}

.footer-logo__img {
    display: block;
    height: 44px;
    width: auto;
    max-height: 44px;
    max-width: 200px;
    object-fit: contain;
    object-position: left center;
}

.footer-tagline {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: 1.75;
    margin-bottom: var(--space-6);
    max-width: 300px;
}

.footer-social {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.footer-social__link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--color-slate-400);
    font-size: 1rem;
    transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-fast);
}

.footer-social__link:hover {
    background: var(--color-red-500);
    border-color: var(--color-red-500);
    color: var(--color-white);
    transform: translateY(-2px);
}

.footer-cert {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.footer-cert__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-slate-300);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-pill);
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.footer-cert__badge:hover {
    background: rgba(230, 50, 36, 0.12);
    border-color: rgba(230, 50, 36, 0.3);
}

.footer-cert__badge i {
    color: var(--color-red-400);
    font-size: 0.8rem;
}

.footer-col--brand {
    max-width: 320px;
}

.footer-col__heading {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-2);
    border-bottom: 2px solid var(--color-red-500);
    letter-spacing: 0.02em;
}

.footer-col__heading--spaced {
    margin-top: var(--space-6);
}

.footer-col__heading--white {
    color: var(--color-white);
    border-bottom: none;
    margin-bottom: var(--space-2);
}

.footer-contact-block {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.footer-contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
    line-height: 1.8;
}

.footer-contact-list__link {
    color: var(--color-slate-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-contact-list__link:hover {
    color: var(--color-red-400);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-links__item {
    font-size: var(--text-sm);
    color: var(--color-slate-400);
    transition: color var(--transition-fast),
        padding-left var(--transition-fast);
    padding-left: 0;
}

.footer-links__item:hover {
    color: var(--color-red-400);
    padding-left: var(--space-2);
}

/* Contact column */
.footer-address {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.footer-contact-item__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    border-radius: var(--radius-md);
    background: rgba(91, 184, 212, 0.12);
    color: var(--color-sky-400);
    font-size: var(--text-sm);
}

.footer-contact-item__icon--wa {
    color: #25d366;
}

.footer-contact-item__text {
    font-size: var(--text-sm);
    color: var(--color-slate-400);
    line-height: 1.5;
}

.footer-contact-item__text--link {
    transition: color var(--transition-fast);
}

.footer-contact-item__text--link:hover {
    color: var(--color-sky-400);
}

.footer-cta-btn {
    width: 100%;
    justify-content: center;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--space-5) 0;
    background: rgba(0, 0, 0, 0.15);
}

.footer-bottom__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-bottom__copy {
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
    margin-bottom: 0;
}

.footer-bottom__dev {
    margin-left: var(--space-2);
    padding-left: var(--space-2);
    border-left: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-bottom__links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
}

.footer-bottom__link {
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
    transition: color var(--transition-fast);
}

.footer-bottom__link:hover {
    color: var(--color-red-400);
}


/* ────────────────────────────────────────────────────────────
   10. UTILITY CLASSES
   ──────────────────────────────────────────────────────────── */
.text-center {
    text-align: center;
}

.text-dark {
    color: var(--color-navy-950) !important;
}

.hover-text-red:hover {
    color: var(--color-red-500) !important;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-0 {
    margin-top: 0;
}

.mb-0 {
    margin-bottom: 0;
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-6 {
    margin-bottom: var(--space-6);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-subtle);
    margin-bottom: var(--space-6);
}

.breadcrumb__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.breadcrumb__link {
    color: var(--color-text-subtle);
    transition: color var(--transition-fast);
}

.breadcrumb__link:hover {
    color: var(--color-blue-400);
}

.breadcrumb__separator {
    color: var(--color-text-subtle);
    font-size: 0.65rem;
}

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

/* Tag / pill links */
.tag-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-blue-400);
    background: rgba(30, 111, 255, 0.1);
    border: 1px solid var(--color-border-blue);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-pill);
    transition: background-color var(--transition-fast),
        color var(--transition-fast);
}

.tag-link:hover {
    background-color: var(--color-blue-500);
    color: var(--color-white);
}

/* AEO Snippet Block */
.snippet-block {
    background: rgba(230, 50, 36, 0.06);
    border-left: 4px solid var(--color-red-500);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--space-5) var(--space-6);
    margin-bottom: var(--space-8);
}

.snippet-block p {
    font-size: var(--text-lg);
    color: var(--color-slate-200);
    line-height: 1.7;
    margin-bottom: 0;
    font-style: italic;
}


/* ────────────────────────────────────────────────────────────
   11. SCROLL REVEAL ANIMATIONS
   ──────────────────────────────────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left {
    opacity: 0;
    transform: translateX(-32px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-right {
    opacity: 0;
    transform: translateX(32px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible,
.reveal-left.visible,
.reveal-right.visible {
    opacity: 1;
    transform: none;
}

.reveal--delay-1 {
    transition-delay: 0.1s;
}

.reveal--delay-2 {
    transition-delay: 0.2s;
}

.reveal--delay-3 {
    transition-delay: 0.3s;
}

.reveal--delay-4 {
    transition-delay: 0.4s;
}

.reveal--delay-5 {
    transition-delay: 0.5s;
}


/* ────────────────────────────────────────────────────────────
   12. FLOATING ELEMENTS (FAB, STICKY BAR, BACK TO TOP)
   ──────────────────────────────────────────────────────────── */

/* WhatsApp FAB */
.whatsapp-fab {
    position: fixed;
    bottom: 96px;
    right: var(--space-5);
    z-index: var(--z-fab);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background-color: #25d366;
    color: var(--color-white);
    border-radius: var(--radius-pill);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.45);
    transition: transform var(--transition-base),
        box-shadow var(--transition-base);
    text-decoration: none;
}

.whatsapp-fab i {
    font-size: var(--text-xl);
}

.whatsapp-fab span {
    display: none;
}

.whatsapp-fab:hover {
    transform: scale(1.08) translateY(-2px);
    box-shadow: 0 8px 24px rgba(37, 211, 102, 0.55);
    color: var(--color-white);
}

@media (min-width: 768px) {
    .whatsapp-fab {
        bottom: var(--space-8);
        margin-bottom: 20px;    
        right: var(--space-6);
    }

    .whatsapp-fab span {
        display: inline;
    }
}

/* Mobile sticky bottom bar */
.mobile-sticky-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    background-color: #f8fafc;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
    padding: 6px 0;
}

.sticky-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: #1e293b;
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 700;
    transition: all 0.2s ease;
}

.sticky-item i {
    font-size: 1.3rem;
    color: var(--color-sky-600);
}

.sticky-item span {
    display: block;
}

.sticky-whatsapp i {
    color: #25d366 !important;
}

.sticky-item:active {
    background-color: rgba(0, 0, 0, 0.05);
}

@media (min-width: 768px) {
    .mobile-sticky-bar {
        display: none;
    }
}

/* Back to top */
.back-to-top {
    position: fixed;
    bottom: 96px;
    left: var(--space-5);
    z-index: var(--z-fab);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background-color: rgba(15, 32, 64, 0.9);
    border: 1px solid var(--color-border-blue);
    color: var(--color-blue-400);
    font-size: var(--text-sm);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity var(--transition-base),
        visibility var(--transition-base),
        transform var(--transition-base),
        background-color var(--transition-fast);
    backdrop-filter: blur(8px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--color-blue-500);
    color: var(--color-white);
}

@media (min-width: 768px) {
    .back-to-top {
        bottom: var(--space-10);
        left: var(--space-6);
        margin-bottom: 10px;
    }
}


/* ────────────────────────────────────────────────────────────
   13. RESPONSIVE BREAKPOINTS
   ──────────────────────────────────────────────────────────── */

/* Large desktop → mid desktop */
@media (max-width: 1200px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-areas:
            "brand brand"
            "products solutions"
            "contact contact";
        gap: var(--space-8);
    }

    .footer-col--brand {
        grid-area: brand;
        max-width: none;
    }

    .footer-grid > .footer-col:nth-child(2) {
        grid-area: products;
    }

    .footer-grid > .footer-col:nth-child(3) {
        grid-area: solutions;
    }

    .footer-col--contact {
        grid-area: contact;
    }
}

/* Mid-tablet: nav collapses but keep "Get a Quote" visible alongside hamburger */
@media (min-width: 992px) and (max-width: 1129px) {
    .main-nav {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .header-actions .btn-cta {
        display: inline-flex;
        font-size: var(--text-xs);
        padding: 0.55rem 1rem;
    }
}

/* Tablet */
@media (max-width: 991px) {
    .main-nav {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .header-actions .btn-cta {
        display: none;
    }

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

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

/* Mobile */
@media (max-width: 767px) {
    .container {
        padding-left: var(--space-4);
        padding-right: var(--space-4);
    }

    .section {
        padding-top: var(--space-12);
        padding-bottom: var(--space-12);
    }

    .section--lg {
        padding-top: var(--space-16);
        padding-bottom: var(--space-16);
    }

    .grid--2 {
        grid-template-columns: 1fr;
    }

    .grid--3 {
        grid-template-columns: 1fr;
    }

    .grid--4 {
        grid-template-columns: 1fr 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .footer-col--brand {
        max-width: none;
    }

    .footer-tagline {
        max-width: none;
    }

    .footer-bottom__inner {
        flex-direction: column;
        text-align: center;
    }

    .footer-bottom__copy {
        text-align: center;
    }

    .footer-bottom__dev {
        display: block;
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        margin-top: var(--space-2);
    }

    .footer-bottom__links {
        justify-content: center;
    }

    .section-subtitle {
        font-size: var(--text-base);
    }
}

/* Small mobile */
@media (max-width: 480px) {
    .grid--4 {
        grid-template-columns: 1fr;
    }

    .btn-lg {
        padding: 0.875rem 1.5rem;
        font-size: var(--text-sm);
    }
}

/* Quote Modal */
.quote-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

.quote-modal.is-open {
    display: flex;
}

.quote-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    cursor: pointer;
}

.quote-modal__box {
    position: relative;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    background: #ffffff;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--color-border);
}

.quote-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6) var(--space-6) 0;
}

.quote-modal__title {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: #1a1f2e;
    margin: 0;
}

.quote-modal__close {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: #64748b;
    font-size: 1.75rem;
    line-height: 1;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: color var(--transition-base), background-color var(--transition-base);
}

.quote-modal__close:hover {
    color: #1a1f2e;
    background: #f1f5f9;
}

.quote-modal__form {
    padding: var(--space-6);
}

.quote-modal__form .form-group {
    margin-bottom: var(--space-5);
}

.inquiry-form .form-error,
.inquiry-form .invalid-feedback,
.contact-form .form-error,
.contact-form .invalid-feedback {
    display: block;
    color: var(--color-red-500) !important;
    font-size: var(--text-xs);
    font-weight: 600;
    margin-top: var(--space-1);
}

.captcha-group {
    margin: var(--space-4) 0;
    min-height: 78px;
}

@media (max-width: 768px) {
    .captcha-group {
        transform: scale(0.85);
        transform-origin: 0 0;
        margin-bottom: var(--space-2);
    }
}