:root {
    /* Brand Colors */
    --deep-graphite: #141517;
    --soft-charcoal: #232529;
    --silver-shield: #d4d8dd;
    --pure-white: #ffffff;
    --amber-core: #e67e22;
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
    
    /* Theme Variables */
    --bg-gradient-start: var(--deep-graphite);
    --bg-gradient-end: var(--soft-charcoal);
    --text-primary: var(--silver-shield);
    --text-heading: var(--pure-white);
    
    /* Glass & Card Variables */
    --glass-bg: rgba(212, 216, 221, 0.03);
    --glass-border: rgba(212, 216, 221, 0.05);
    --glass-bg-hover: rgba(212, 216, 221, 0.06);
    --glass-border-hover: rgba(230, 126, 34, 0.3);
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --card-shadow-hover: 0 25px 45px -10px rgba(0, 0, 0, 0.5), 0 0 20px rgba(230, 126, 34, 0.12);
    
    /* Section & Feature Variables */
    --section-bg: rgba(255, 255, 255, 0.02);
    --section-border: rgba(212, 216, 221, 0.04);
    --feature-bg: rgba(0, 0, 0, 0.15);
    --feature-bg-hover: rgba(255, 255, 255, 0.05);
    
    /* Vendor Logos & Images */
    --vendor-logo-filter: brightness(0) invert(1) opacity(0.3);
    --vendor-logo-filter-hover: brightness(0) invert(1) opacity(1);
    --showcase-filter: brightness(0.7) contrast(1.1);
    --showcase-filter-hover: brightness(1) contrast(1);
}

body.light-mode {
    --bg-gradient-start: #f8fafc;
    --bg-gradient-end: #e2e8f0;
    --text-primary: #475569;
    --text-heading: #0f172a;
    
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-bg-hover: rgba(255, 255, 255, 0.9);
    --glass-border-hover: var(--amber-core);
    --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    --card-shadow-hover: 0 20px 40px -10px rgba(0, 0, 0, 0.1), 0 0 20px rgba(230, 126, 34, 0.15);
    
    --section-bg: rgba(255, 255, 255, 0.4);
    --section-border: rgba(255, 255, 255, 0.6);
    --feature-bg: rgba(255, 255, 255, 0.5);
    --feature-bg-hover: rgba(255, 255, 255, 0.8);
    
    --vendor-logo-filter: brightness(0) opacity(0.4);
    --vendor-logo-filter-hover: brightness(0) opacity(1);
    --showcase-filter: brightness(0.9) contrast(1.05);
    --showcase-filter-hover: brightness(1.05) contrast(1.05);
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-gradient-end);
    background-image: linear-gradient(145deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    color: var(--text-primary);
    transition: background-color 0.5s ease, background-image 0.5s ease, color 0.5s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background Atmospheric Glows */
.background-effects {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.glow-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(230,126,34,0.04) 0%, rgba(230,126,34,0) 70%);
    border-radius: 50%;
    filter: blur(50px);
}

#orb-left {
    top: -150px;
    left: -150px;
    animation: drift 20s ease-in-out infinite alternate;
}

#orb-right {
    bottom: -150px;
    right: -150px;
    background: radial-gradient(circle, rgba(212,216,221,0.03) 0%, rgba(212,216,221,0) 70%);
    animation: drift 25s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

/* Base Wrapper Elements */
header, main, footer {
    z-index: 1;
    position: relative;
    width: 100%;
    max-width: 1100px;
}

/* Controls Container */
.lang-toggle-container {
    position: absolute;
    top: 30px;
    right: 30px;
    display: flex;
    align-items: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 5px;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.theme-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 6px;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    opacity: 0.6;
}

.theme-btn:hover {
    color: var(--amber-core);
    background: rgba(230, 126, 34, 0.1);
    opacity: 1;
}

.theme-btn .feather {
    width: 16px;
    height: 16px;
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    opacity: 0.5;
    font-family: var(--font-primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 12px;
    cursor: pointer;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    color: var(--text-heading);
    opacity: 1;
}

.lang-btn.active {
    background: var(--amber-core);
    color: #ffffff;
    opacity: 1;
    box-shadow: 0 0 10px rgba(230, 126, 34, 0.4);
}

.lang-divider {
    width: 1px;
    height: 14px;
    background: var(--glass-border);
    margin: 0 4px;
}

/* Header & Logo Section */
header {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 60px 20px 20px;
}

.logo-container {
    width: 320px;
    height: 320px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 40px;
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.6);
    margin-bottom: 25px;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

body.light-mode .logo-container {
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.1);
}

.logo-container:hover {
    transform: translateY(-10px) scale(1.02);
}

.logo-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Clock & Date Widget */
.clock-container {
    text-align: center;
    margin-bottom: 50px;
}

.time {
    font-size: 4rem;
    font-weight: 200;
    color: var(--text-heading);
    letter-spacing: 6px;
    text-shadow: 0 0 30px rgba(255,255,255,0.05);
}

.date {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-primary);
    letter-spacing: 3px;
    text-transform: uppercase;
    opacity: 0.6;
    margin-top: 5px;
}

/* Main Spacing */
main {
    padding: 0 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 60px;
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 25px;
    justify-content: center;
}

/* App Cards (Glassmorphism + Modern Borders) */
.card {
    background: var(--glass-bg); 
    border: 1px solid var(--glass-border); 
    border-radius: 20px;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    box-shadow: var(--card-shadow);
}

.card:hover {
    transform: translateY(-8px);
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    box-shadow: var(--card-shadow-hover);
}

.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--amber-core);
    transform: scaleX(0);
    transition: transform 0.4s ease;
    transform-origin: center;
}

.card:hover::before {
    transform: scaleX(1);
}

.card .icon {
    width: 42px;
    height: 42px;
    color: var(--text-primary);
    margin-bottom: 20px;
    transition: color 0.3s ease, transform 0.4s ease;
    stroke-width: 1.5;
}

.card:hover .icon {
    color: var(--amber-core);
    transform: scale(1.1) translateY(-2px);
}

.card .name {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-heading);
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.card .status {
    font-size: 0.8rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: #22c55e;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.6);
    transition: all 0.3s ease;
}

.status-dot.offline {
    background-color: #ef4444;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.6);
}

.card.offline {
    opacity: 0.6;
}

.card.offline:hover {
    border-color: rgba(239, 68, 68, 0.3);
    box-shadow: var(--card-shadow-hover);
    opacity: 1;
}

.card.offline::before {
    background: #ef4444;
}

.card.offline:hover .icon {
    color: #ef4444;
}

/* Informational Sections */
.info-section {
    background: var(--section-bg);
    border: 1px solid var(--section-border);
    border-radius: 20px;
    padding: 40px;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: var(--card-shadow);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-heading);
    letter-spacing: 2px;
    margin-bottom: 20px;
    display: inline-block;
    position: relative;
}

.section-accent {
    width: 40px;
    height: 3px;
    background: var(--amber-core);
    border-radius: 2px;
    margin-bottom: 25px;
    box-shadow: 0 0 10px rgba(230, 126, 34, 0.4);
}

.section-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 40px;
    max-width: 850px;
}

/* Showcase Grid */
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 240px;
    gap: 15px;
    margin-top: 20px;
}

.showcase-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.showcase-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: var(--showcase-filter);
    transition: all 0.7s ease;
}

.showcase-item:hover {
    transform: scale(1.02);
    border-color: var(--glass-border-hover);
    box-shadow: var(--card-shadow-hover);
    z-index: 2;
}

.showcase-item:hover img {
    transform: scale(1.1);
    filter: var(--showcase-filter-hover);
}

.showcase-item.tall {
    grid-row: span 2;
}

.showcase-item.wide {
    grid-column: span 2;
}

@media (max-width: 1024px) {
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .showcase-grid {
        grid-template-columns: 1fr;
        grid-auto-rows: 300px;
    }
    .showcase-item.tall, .showcase-item.wide {
        grid-row: auto;
        grid-column: auto;
    }
}

/* Feature Grid for Smart Environment */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.feature-item {
    background: var(--feature-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: var(--feature-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-3px);
}

.feature-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
}

.feature-icon {
    width: 24px;
    height: 24px;
    color: var(--amber-core);
    stroke-width: 2;
}

.feature-item h3 {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-heading);
}

.feature-desc {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-primary);
}

/* Infrastructure List / Grid */
.infra-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.infra-row {
    background: var(--feature-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    transition: all 0.3s ease;
}

.infra-row:hover {
    background: var(--feature-bg-hover);
    border-color: var(--glass-border);
    transform: translateX(5px);
}

.infra-icon {
    width: 28px;
    height: 28px;
    color: var(--text-primary);
    stroke-width: 1.5;
    flex-shrink: 0;
    margin-top: 2px;
    transition: color 0.3s ease;
}

.infra-row:hover .infra-icon {
    color: var(--amber-core);
}

.infra-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.infra-content h3 {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-heading);
    line-height: 1.4;
}

.infra-content p {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-primary);
}

/* Vendors Section */
.vendors-section {
    padding: 20px;
    margin-top: 10px;
    display: flex;
    justify-content: center;
    border-top: 1px solid var(--glass-border);
    padding-top: 50px;
}

.vendors-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 80px;
    flex-wrap: wrap;
    max-width: 900px;
}

.vendor-link {
    display: block;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.vendor-logo {
    height: 35px;
    width: auto;
    object-fit: contain;
    filter: var(--vendor-logo-filter);
    transition: all 0.4s ease;
}

.vendor-link:hover {
    transform: translateY(-5px);
}

.vendor-link:hover .vendor-logo {
    filter: var(--vendor-logo-filter-hover);
    transform: scale(1.05);
}

/* Footer Section */
footer {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-primary);
    font-size: 0.75rem;
    letter-spacing: 4px;
    margin-top: auto;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .logo-container {
        width: 200px;
        height: 200px;
    }
    
    .time {
        font-size: 3rem;
    }
    
    .grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 15px;
    }
    
    .card {
        padding: 24px 16px;
    }
    
    .card .icon {
        width: 32px;
        height: 32px;
    }
    
    .card .name {
        font-size: 0.95rem;
    }
    
    .info-section {
        padding: 25px;
    }
    
    .feature-grid, .infra-list {
        grid-template-columns: 1fr;
    }
    
    .vendors-container {
        gap: 40px;
    }
    
    .vendor-logo {
        height: 25px;
    }
    
    .lang-toggle-container {
        top: 15px;
        right: 15px;
    }
}