:root {
    --bg-dark: #0a0f1c;   /* Darker, richer tone */
    --bg-card: rgba(20, 30, 45, 0.6);
    --bg-card-hover: rgba(30, 40, 60, 0.85);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.08);
    --glow-color: rgba(56, 189, 248, 0.15);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    /* Subtle dot grid pattern for technical aesthetic */
    background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 24px 24px;
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animations Core */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes pulseGlow {
    0% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
    100% { transform: scale(1); opacity: 0.5; }
}

.fade-in { animation: fadeIn 0.8s ease-out both; }
.fade-up-1 { animation: fadeUp 0.8s ease-out 0.1s both; }
.fade-up-2 { animation: fadeUp 0.8s ease-out 0.3s both; }
.fade-up-3 { animation: fadeUp 0.8s ease-out 0.5s both; }

/* Navbar */
.navbar {
    padding: 1.5rem 5%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    background: rgba(10, 15, 28, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    text-decoration: none;
    color: white;
    letter-spacing: -0.5px;
    transition: transform 0.3s;
}
.logo:hover { transform: scale(1.05); }
.logo span { color: #38bdf8; }
.nav-subtitle { color: var(--text-muted); font-size: 0.9rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 5%;
    position: relative;
}

/* Hero Index */
.hero-section {
    text-align: center;
    margin-bottom: 5rem;
    position: relative;
}
.glow-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse, var(--glow-color) 0%, transparent 70%);
    z-index: -1;
    animation: pulseGlow 8s infinite alternate;
}
.hero-section h1 {
    font-size: clamp(3rem, 6vw, 4.5rem);
    margin-bottom: 1rem;
    line-height: 1.1;
    letter-spacing: -1px;
}
.gradient-text {
    background: linear-gradient(135deg, #38bdf8, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-section p {
    color: var(--text-muted);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto;
    font-weight: 300;
}

/* Overview Charts */
.charts-overview {
    margin-bottom: 6rem;
}
.section-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 2rem;
    color: var(--text-main);
    letter-spacing: -0.5px;
    border-left: 4px solid #38bdf8;
    padding-left: 1rem;
}
.overview-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
}
.overview-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to bottom right, rgba(255,255,255,0.05) 0%, transparent 50%);
    pointer-events: none;
}
.overview-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
    border-color: rgba(255,255,255,0.15);
}
.overview-card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    color: var(--text-muted);
    font-weight: 600;
}
.main-overview { margin-bottom: 2rem; }
.overview-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.overview-chart-container {
    position: relative;
    width: 100%;
    height: 300px;
}
.intensity-chart {
    height: 400px;
}

/* Dashboard Grid */
.company-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2.5rem;
}

.company-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    text-decoration: none;
    color: var(--text-main);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
    display: block;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(8px);
    animation: fadeUp 0.6s ease-out backwards;
}

.company-card::before {
    content:'';
    position: absolute;
    top: 0; left: 0;
    width: 6px;
    height: 100%;
    background: var(--brand-color);
    transition: width 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.company-card:hover {
    transform: translateY(-10px) scale(1.02);
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.company-card:hover::before {
    width: 100%;
    opacity: 0.05;
}

.company-card h2 {
    font-size: 2.2rem;
    margin-bottom: 2rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.card-stats {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    position: relative;
    z-index: 2;
}

.stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    border-bottom: 1px dashed rgba(255,255,255,0.05);
    padding-bottom: 0.6rem;
}
.stat:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.stat span { color: var(--text-muted); font-weight: 400; }
.stat strong { font-size: 1.2rem; font-weight: 800; }

/* Detail Pages */
.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 4rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2rem;
    animation: fadeIn 0.8s ease-out;
}

.detail-title h1 {
    font-size: clamp(3.5rem, 6vw, 5rem);
    color: var(--brand-color);
    margin-bottom: 0.5rem;
    line-height: 1;
    letter-spacing: -2px;
}

.detail-title p {
    color: var(--text-muted);
    font-size: 1.2rem;
}

.back-btn {
    padding: 0.8rem 1.8rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s, transform 0.3s;
    display: inline-block;
}

.back-btn:hover {
    background: rgba(255,255,255,0.1);
    transform: translateX(-5px);
}

/* KPIs */
.kpi-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
    animation: fadeUp 0.8s ease-out 0.2s both;
}

.kpi-card {
    background: linear-gradient(145deg, rgba(30,41,59,0.8), rgba(15,23,42,0.6));
    border: 1px solid var(--border-color);
    border-left: 6px solid var(--brand-color);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    text-align: left;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transition: transform 0.3s;
}

.kpi-card:hover {
    transform: translateY(-5px);
}

.kpi-card h4 {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.kpi-value {
    font-size: 3rem;
    font-weight: 800;
    color: white;
    line-height: 1.1;
    letter-spacing: -1px;
}

.kpi-trend {
    font-size: 1rem;
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.trend-up { color: #ef4444; } /* Red */
.trend-down { color: #10b981; } /* Green */
.trend-neutral { color: var(--text-muted); }

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    animation: fadeUp 0.8s ease-out 0.4s both;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    transition: transform 0.3s, box-shadow 0.3s;
}
.chart-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}

.chart-card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.15rem;
    color: var(--text-muted);
    font-weight: 600;
    text-align: center;
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

@media (max-width: 968px) {
    .overview-cols {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .detail-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
    }
    .charts-grid {
        grid-template-columns: 1fr;
    }
    .nav-subtitle { display: none; }
    .kpi-value { font-size: 2.5rem; }
}

/* Products Section - Data Table */
.products-section {
    margin-top: 6rem;
    margin-bottom: 4rem;
}
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1rem;
    overflow-x: auto;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}
.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    min-width: 700px;
}
.data-table th, .data-table td {
    padding: 1.2rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.data-table th {
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1.5px;
}
.data-table tbody tr {
    transition: background 0.3s, transform 0.2s;
}
.data-table tbody tr:hover {
    background: rgba(255,255,255,0.04);
    transform: translateX(6px);
}
.cat-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: inline-block;
}
.text-muted {
    color: var(--text-muted);
}

/* Forms, Buttons & Calculator */
.btn {
    padding: 1.2rem 2.8rem;
    border-radius: 50px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: none;
    text-decoration: none;
    display: inline-block;
    font-size: 1.1rem;
}
.btn.primary {
    background: #f8fafc;
    color: #0f172a;
}
.btn.primary.glow {
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    color: white;
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.2);
}
.btn.primary.glow:hover {
    box-shadow: 0 15px 40px rgba(56, 189, 248, 0.5);
    transform: translateY(-5px) scale(1.03);
}
.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}
.nav-link {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
    font-size: 0.95rem;
    position: relative;
}
.nav-link::after {
    content:'';
    position: absolute; width:0; height:2px; bottom:-4px; left:0;
    background: #38bdf8; transition: width 0.3s;
}
.nav-link:hover { color: #38bdf8; }
.nav-link:hover::after { width:100%; }

/* Calculator UI Layout */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 1rem;
    align-items: stretch;
}
.calc-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}
.calc-card h2 {
    margin-bottom: 2rem;
    font-size: 1.8rem;
    color: var(--brand-color, #f8fafc);
}
.form-group {
    margin-bottom: 1.8rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    color: var(--text-main);
    font-weight: 600;
    font-size: 1rem;
}
.form-control {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    color: white;
    padding: 1rem 1.2rem;
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-size: 1.05rem;
    transition: all 0.3s;
}
.form-control:focus {
    outline: none;
    border-color: #38bdf8;
    background: rgba(15, 23, 42, 0.9);
    box-shadow: 0 0 0 4px rgba(56,189,248,0.15);
}
.device-selector {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}
.device-selector select {
    flex: 1;
}
.result-display {
    text-align: center;
    margin-top: 1rem;
    padding-bottom: 2rem;
    border-bottom: 1px dashed var(--border-color);
}
.result-display p {
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.huge-number {
    margin-top: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: 20px;
    background: rgba(16, 185, 129, 0.05);
    border: 1px dashed rgba(16, 185, 129, 0.2);
}
.huge-number span:first-child {
    font-size: 4.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, #10b981, #38bdf8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}
.calc-chart-container {
    position: relative;
    height: 350px;
    width: 100%;
    margin-top: 3rem;
}

@media (max-width: 968px) {
    .calculator-grid { grid-template-columns: 1fr; }
}