/* 
   SEID AS - Hot-Dip Galvanizing Landing Page Design System
   Aesthetic: Premium industrial, high-frequency energy, environmental purity.
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
    /* Color Palette */
    --bg-main: #060913;
    --bg-darker: #03050a;
    --bg-card: rgba(13, 20, 38, 0.6);
    --bg-card-hover: rgba(20, 30, 58, 0.8);
    
    --primary: #00d2ff;       /* ModuPower / High Frequency Cyan */
    --primary-rgb: 0, 210, 255;
    --secondary: #00ff87;     /* Clean Eco Green */
    --secondary-rgb: 0, 255, 135;
    --accent: #f59e0b;        /* Molten Zinc Orange */
    
    --text-white: #ffffff;
    --text-light: #f1f5f9;
    --text-muted: #94a3b8;
    --text-dark: #0f172a;
    
    --border-glow: rgba(0, 210, 255, 0.15);
    --border-card: rgba(255, 255, 255, 0.05);
    
    /* Layout & Spacing */
    --max-width: 1280px;
    --border-radius-lg: 16px;
    --border-radius-md: 8px;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-main);
    color: var(--text-light);
    font-family: 'Plus Jakarta Sans', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .brand-font {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--text-white);
    letter-spacing: -0.02em;
}

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

/* Background Gradients */
.bg-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
    animation: float-blobs 20s infinite alternate ease-in-out;
}

.blob-1 {
    top: -10%;
    right: 10%;
    width: 45vw;
    height: 45vw;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.6) 0%, transparent 70%);
}

.blob-2 {
    bottom: 10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(var(--secondary-rgb), 0.6) 0%, transparent 70%);
    animation-delay: -5s;
}

@keyframes float-blobs {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 30px) scale(1.1); }
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(6, 9, 19, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-card);
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    background: rgba(3, 5, 10, 0.85);
    padding: 10px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-white);
}

.logo span {
    color: var(--primary);
}

.logo img {
    height: 36px;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition-smooth);
    position: relative;
    padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-white);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: var(--transition-smooth);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* Language Selector Dropdown */
.lang-selector {
    position: relative;
    padding: 6px 0;
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 50%;
    transform: translateX(50%) translateY(10px);
    background: rgba(10, 16, 32, 0.95);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-md);
    padding: 8px 0;
    list-style: none;
    min-width: 140px;
    display: none;
    flex-direction: column;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1100;
    opacity: 0;
    transition: var(--transition-smooth);
}

.lang-selector:hover .lang-dropdown {
    display: flex;
    opacity: 1;
    transform: translateX(50%) translateY(0);
}

.lang-dropdown li {
    width: 100%;
}

.lang-dropdown li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: var(--transition-smooth);
    width: 100%;
    text-align: left;
}

.lang-dropdown li a:hover {
    color: var(--text-white);
    background: rgba(255, 255, 255, 0.05);
}

.lang-dropdown li a i {
    font-size: 0.75rem;
    color: var(--primary);
}

.nav-cta {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-darker);
    padding: 10px 22px;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(0, 210, 255, 0.25);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 210, 255, 0.4);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--text-white);
    border-radius: 3px;
    transition: var(--transition-smooth);
}

/* Sections General */
section {
    padding: 100px 24px;
    position: relative;
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-tag {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-weight: 700;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
    display: inline-block;
}

.section-title {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 700px;
    margin-bottom: 60px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 140px;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.hero-content {
    z-index: 10;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 24px;
    font-weight: 800;
}

.hero-title span.gradient-text-blue {
    background: linear-gradient(135deg, #fff 40%, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-title span.gradient-text-green {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    max-width: 600px;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.btn {
    padding: 14px 28px;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-darker);
    box-shadow: 0 8px 30px rgba(0, 210, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 210, 255, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-white);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    padding-top: 32px;
    border-top: 1px solid var(--border-card);
}

.stat-item h3 {
    font-size: 2.25rem;
    font-weight: 800;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.stat-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.tech-container {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 1;
    position: relative;
}

.visual-image {
    width: 100%;
    height: 100%;
    border-radius: var(--border-radius-lg);
    object-fit: cover;
    border: 1px solid var(--border-card);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    background-color: var(--bg-card);
}

.visual-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 110%;
    height: 110%;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.15) 0%, transparent 65%);
    z-index: -1;
    pointer-events: none;
}

.orbital-ring {
    position: absolute;
    border: 1.5px dashed rgba(var(--primary-rgb), 0.3);
    border-radius: 50%;
    animation: rotate 30s linear infinite;
}

.ring-1 {
    top: -5%; left: -5%; width: 110%; height: 110%;
}

.ring-2 {
    top: -15%; left: -15%; width: 130%; height: 130%;
    animation-duration: 45s;
    animation-direction: reverse;
    border-color: rgba(var(--secondary-rgb), 0.2);
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Glass Card Global style */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--border-radius-lg);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(var(--primary-rgb), 0.3);
    box-shadow: 0 15px 35px rgba(0, 210, 255, 0.1);
    transform: translateY(-5px);
}

/* Challenge Section */
.challenge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.challenge-card {
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.challenge-icon {
    font-size: 2.25rem;
    color: var(--accent);
    background: rgba(245, 158, 11, 0.1);
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.challenge-card.acid .challenge-icon {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
}

.challenge-card.zinc-fumes .challenge-icon {
    color: var(--primary);
    background: rgba(0, 210, 255, 0.1);
    border-color: rgba(0, 210, 255, 0.2);
}

.challenge-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
}

.challenge-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Solution Highlights */
.solutions-showcase {
    display: flex;
    flex-direction: column;
    gap: 120px;
}

.solution-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 64px;
    align-items: center;
}

.solution-row:nth-child(even) .solution-content {
    order: 2;
}

.solution-content {
    display: flex;
    flex-direction: column;
}

.tech-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    padding: 6px 12px;
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary);
    border-radius: 50px;
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    align-self: flex-start;
    margin-bottom: 20px;
}

.tech-tag.green {
    background: rgba(var(--secondary-rgb), 0.1);
    color: var(--secondary);
    border-color: rgba(var(--secondary-rgb), 0.2);
}

.solution-title {
    font-size: 2.25rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.solution-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 28px;
}

.solution-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.solution-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
}

.solution-features li i {
    color: var(--secondary);
    font-size: 1.1rem;
}

.solution-visual {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    aspect-ratio: 1.3;
    border: 1px solid var(--border-card);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.solution-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.solution-visual::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(0deg, var(--bg-main) 0%, rgba(6, 9, 19, 0) 60%);
    pointer-events: none;
}

/* Process Configurator */
.configurator-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 48px;
    align-items: stretch;
}

.configurator-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.configurator-tab {
    padding: 24px;
    cursor: pointer;
    border-left: 4px solid transparent;
    transition: var(--transition-smooth);
}

.configurator-tab:hover {
    background: rgba(255, 255, 255, 0.02);
}

.configurator-tab.active {
    background: rgba(var(--primary-rgb), 0.04);
    border-left-color: var(--primary);
}

.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.tab-title {
    font-size: 1.15rem;
    font-weight: 700;
}

.tab-tag {
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
}

.tab-tag.stage {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

.tab-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.configurator-display {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.display-glow {
    position: absolute;
    top: -20%; right: -20%;
    width: 60%; height: 60%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.2) 0%, transparent 70%);
    pointer-events: none;
    transition: var(--transition-smooth);
}

.tab-content {
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
    height: 100%;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    opacity: 1;
    animation: fadeIn 0.5s forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.display-header {
    margin-bottom: 24px;
}

.display-tag {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    display: block;
}

.display-title {
    font-size: 1.75rem;
    margin-bottom: 12px;
}

.display-body {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 32px;
}

.tech-spec-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

.spec-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 16px;
    border-radius: var(--border-radius-md);
}

.spec-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 4px;
}

.spec-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-white);
}

.spec-value.green { color: var(--secondary); }
.spec-value.blue { color: var(--primary); }

.configurator-visualizer {
    background: rgba(3, 5, 10, 0.6);
    border: 1px dashed rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Dynamic Animation for Visualizer */
.acid-bubbles {
    position: absolute;
    bottom: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(0deg, rgba(239, 68, 68, 0.05) 0%, transparent 80%);
    display: none;
}

.active-acid .acid-bubbles {
    display: block;
}

.active-acid .bubble-elt {
    position: absolute;
    bottom: -10px;
    width: 6px; height: 6px;
    background: rgba(239, 68, 68, 0.4);
    border-radius: 50%;
    animation: rise-bubbles 3s infinite linear;
}

@keyframes rise-bubbles {
    0% { transform: translateY(0) scale(1); opacity: 0; }
    50% { opacity: 0.8; }
    100% { transform: translateY(-120px) scale(1.5); opacity: 0; }
}

.smoke-cloud {
    position: absolute;
    width: 120px; height: 120px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(10px);
    display: none;
}

.active-smoke .smoke-cloud {
    display: block;
    animation: blow-smoke 4s infinite ease-in-out;
}

@keyframes blow-smoke {
    0% { transform: scale(0.6) translate(-20px, 30px); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: scale(1.4) translate(40px, -40px); opacity: 0; }
}

.plasma-beams {
    position: absolute;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(var(--primary-rgb), 0.05), transparent);
    display: none;
}

.active-plasma .plasma-beams {
    display: block;
    animation: pulse-plasma 2s infinite alternate ease-in-out;
}

@keyframes pulse-plasma {
    0% { opacity: 0.3; }
    100% { opacity: 1; }
}

.plasma-arc {
    position: absolute;
    top: 50%; left: 0; width: 100%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
    box-shadow: 0 0 15px var(--primary);
    opacity: 0;
}

.active-plasma .plasma-arc {
    opacity: 0.8;
    animation: flicker-arc 0.2s infinite;
}

@keyframes flicker-arc {
    0%, 100% { transform: translateY(-5px) scaleY(1); }
    50% { transform: translateY(5px) scaleY(0.5); opacity: 0.4; }
}

.visualizer-placeholder {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    z-index: 5;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Calculator Section */
.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.calc-inputs {
    display: flex;
    flex-direction: column;
    gap: 36px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.input-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.input-label {
    font-weight: 600;
    font-size: 0.95rem;
}

.input-value {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--primary);
}

.range-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    transition: var(--transition-smooth);
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.5);
    transition: var(--transition-smooth);
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 15px rgba(0, 210, 255, 0.8);
}

.calc-results {
    padding: 48px;
    display: flex;
    flex-direction: column;
    gap: 32px;
    position: relative;
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    box-shadow: 0 20px 40px rgba(0, 210, 255, 0.05);
}

.calc-results::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.02) 0%, rgba(var(--secondary-rgb), 0.02) 100%);
    border-radius: var(--border-radius-lg);
    pointer-events: none;
}

.result-row {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 24px;
    align-items: center;
}

.result-icon {
    width: 56px;
    height: 56px;
    background: rgba(var(--primary-rgb), 0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
    border: 1px solid rgba(var(--primary-rgb), 0.15);
}

.result-row.green .result-icon {
    background: rgba(var(--secondary-rgb), 0.08);
    color: var(--secondary);
    border-color: rgba(var(--secondary-rgb), 0.15);
}

.result-info {
    display: flex;
    flex-direction: column;
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2px;
}

.result-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-white);
    line-height: 1.1;
}

.result-row.green .result-number {
    color: var(--secondary);
}

/* Uptime Indicator */
.uptime-badge {
    align-self: flex-start;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: rgba(var(--secondary-rgb), 0.1);
    color: var(--secondary);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--secondary);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--secondary);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.6; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.6; }
}

/* Contact & CTA Form */
.contact-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px;
}

.contact-header {
    text-align: center;
    margin-bottom: 48px;
}

.contact-header h2 {
    font-size: 2.25rem;
    margin-bottom: 12px;
}

.contact-header p {
    color: var(--text-muted);
}

.contact-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.form-group-full {
    grid-column: span 2;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-light);
}

.form-input {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-md);
    padding: 14px 18px;
    color: var(--text-white);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-input:focus {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.15);
    outline: none;
}

.form-input::placeholder {
    color: rgba(255, 255, 255, 0.25);
}

textarea.form-input {
    min-height: 140px;
    resize: vertical;
}

.submit-btn {
    grid-column: span 2;
    padding: 16px;
    font-size: 1.05rem;
    margin-top: 12px;
}

/* Form Success State styling */
.form-success-message {
    grid-column: span 2;
    background: rgba(0, 255, 135, 0.08);
    border: 1px solid rgba(0, 255, 135, 0.2);
    padding: 24px;
    border-radius: var(--border-radius-md);
    text-align: center;
    color: var(--secondary);
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    animation: fadeIn 0.5s forwards;
}

.form-success-message i {
    font-size: 2.5rem;
}

.form-success-message h3 {
    color: var(--text-white);
    font-size: 1.25rem;
}

.form-success-message p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background-color: var(--bg-darker);
    border-top: 1px solid var(--border-card);
    padding: 80px 24px 40px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 0.8fr);
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    max-width: 320px;
}

.footer-socials {
    display: flex;
    gap: 16px;
}

.social-icon {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.social-icon:hover {
    background: var(--primary);
    color: var(--bg-darker);
    transform: translateY(-3px);
}

.footer-col h4 {
    font-size: 1rem;
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-link {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.footer-link:hover {
    color: var(--text-white);
    padding-left: 4px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}

.footer-copyright {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    gap: 24px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-legal-link:hover {
    color: var(--text-white);
}

/* Animations Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Styles */
@media (max-width: 1024px) {
    html {
        font-size: 15px;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-ctas {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
        width: 100%;
        max-width: 600px;
    }
    
    .challenge-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solution-row {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .solution-row:nth-child(even) .solution-content {
        order: 0;
    }
    
    .configurator-grid {
        grid-template-columns: 1fr;
    }
    
    .calc-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-grid {
        grid-template-columns: 1.5fr repeat(2, 1fr);
    }
    
    .footer-col:last-child {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-darker);
        flex-direction: column;
        gap: 40px;
        padding-top: 60px;
        transition: var(--transition-smooth);
        border-top: 1px solid var(--border-card);
    }
    
    .nav-menu.open {
        left: 0;
    }
    
    .nav-menu .nav-cta {
        width: 80%;
        text-align: center;
    }
    
    .challenge-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-container {
        padding: 30px;
    }
    
    .contact-form {
        grid-template-columns: 1fr;
    }
    
    .form-group-full {
        grid-column: span 1;
    }
    
    .submit-btn {
        grid-column: span 1;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-col:last-child {
        grid-column: span 1;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

/* Responsive Data Tables styling */
.spec-table-container {
    width: 100%;
    margin-top: 30px;
    margin-bottom: 30px;
    overflow-x: auto;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(13, 20, 38, 0.4);
    border: 1px solid var(--border-card);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.spec-table th, .spec-table td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.spec-table th {
    background: rgba(0, 210, 255, 0.08);
    color: var(--text-white);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.spec-table td {
    color: var(--text-light);
    font-size: 0.95rem;
}

.spec-table tr:last-child td {
    border-bottom: none;
}

.spec-table tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.spec-table td.highlight {
    color: var(--secondary);
    font-weight: 700;
}

.spec-table td.limit {
    color: var(--text-muted);
}

/* Expanded ROI Calculator CSS */
.calc-inputs.flex-col {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.advanced-toggle-btn {
    align-self: flex-start;
    background: transparent !important;
    border: 1px solid rgba(0, 210, 255, 0.3) !important;
    color: var(--primary) !important;
    padding: 10px 18px;
    border-radius: var(--border-radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-smooth);
    margin-top: 8px;
    outline: none;
}

.advanced-toggle-btn:hover {
    background: rgba(0, 210, 255, 0.08) !important;
    border-color: var(--primary) !important;
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
}

.advanced-panel {
    max-height: 600px;
    opacity: 1;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.4s ease, padding 0.4s ease, border-color 0.4s ease;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
}

.advanced-panel.collapsed {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
    border-color: transparent;
    border-top: none;
    border-bottom: none;
    pointer-events: none;
    margin: 0;
}

.system-specific-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 24px;
    background: rgba(0, 210, 255, 0.02);
    border: 1px solid rgba(0, 210, 255, 0.1);
    border-radius: var(--border-radius-md);
    transition: var(--transition-smooth);
}

.system-specific-panel.hidden {
    display: none !important;
}

.panel-subtitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-white);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.input-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.input-group-sub {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group-sub label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
}

.form-input-sub {
    background: rgba(255, 255, 255, 0.02) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    border-radius: var(--border-radius-md);
    padding: 10px 12px;
    color: var(--text-white) !important;
    font-family: inherit;
    font-size: 0.9rem;
    width: 100%;
    outline: none;
    transition: var(--transition-smooth);
}

.form-input-sub:focus {
    border-color: var(--primary) !important;
    background: rgba(255, 255, 255, 0.05) !important;
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.15);
}

.result-row.accent .result-icon {
    background: rgba(245, 158, 11, 0.08);
    color: var(--accent);
    border-color: rgba(245, 158, 11, 0.15);
}

.payback-bar-container {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    margin-top: 10px;
    overflow: hidden;
}

.payback-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #f59e0b);
    box-shadow: 0 0 8px #f59e0b;
    border-radius: 3px;
    transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.comparison-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

@media (max-width: 768px) {
    .input-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

/* Styled option dropdown elements for dark theme integration */
.form-input option {
    background-color: #0d1426 !important;
    color: var(--text-white) !important;
}