:root {
    --aoi-red: #E31E24;
    --aoi-black: #1A1A1B;
    --aoi-white: #FFFFFF;
    --aoi-gray: #F4F4F4;
    --text-main: #1A1A1B;
    --text-light: #FFFFFF;
}

body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    background-color: var(--aoi-white);
    color: var(--text-main);
    margin: 0;
    line-height: 1.6;
}

header {
    background: var(--aoi-white);
    border-bottom: 2px solid var(--aoi-red);
    padding: 1rem 5%;
    position: fixed;
    width: 90%;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-weight: 900;
    font-size: 1.8rem;
    color: var(--aoi-black);
    letter-spacing: -1px;
}

.logo-text span { color: var(--aoi-red); }

nav a {
    color: var(--aoi-black);
    text-decoration: none;
    margin-left: 2rem;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    transition: 0.2s;
}

nav a:hover { color: var(--aoi-red); }

.hero {
    padding: 180px 10% 100px;
    background: var(--aoi-black);
    color: var(--aoi-white);
    text-align: left;
    position: relative;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: 0;
    transform: translate(-50%, -50%);
    object-fit: cover;
    opacity: 0.3; /* Semi-transparent */
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 40%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(227, 30, 36, 0.1));
}

.hero h1 { 
    font-size: 4rem; 
    margin: 0; 
    line-height: 1;
    text-transform: uppercase;
}

.hero h1 span { color: var(--aoi-red); }

.hero p { 
    font-size: 1.1rem; 
    color: #ccc; 
    max-width: 600px; 
    margin: 20px 0; 
    letter-spacing: 0.5px;
}

.section-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 0;
    padding: 0;
}

.card.inverter { background: var(--aoi-white); color: var(--aoi-black); }

.card {
    padding: 80px 10%;
    text-decoration: none;
    color: inherit;
    transition: 0.4s;
    border: 1px solid #eee;
}

.card.usb { background: var(--aoi-white); color: var(--aoi-black); }
.card.power { background: var(--aoi-gray); color: var(--aoi-black); }

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    z-index: 2;
}

.card h2 { 
    font-size: 2.5rem; 
    margin-top: 0; 
    text-transform: uppercase;
    border-left: 5px solid var(--aoi-red);
    padding-left: 20px;
}

.tag {
    display: inline-block;
    background: var(--aoi-red);
    color: #fff;
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 800;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.footer {
    padding: 60px 5%;
    background: var(--aoi-black);
    color: #666;
    text-align: center;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

/* Showcase Grid Layout */
.case-study-section {
    padding: 60px 10%;
    background-color: var(--aoi-white);
}

.section-title {
    color: var(--aoi-black);
    border-left: 5px solid var(--aoi-red);
    padding-left: 20px;
    margin-bottom: 40px;
    text-transform: uppercase;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.case-card {
    border: 1px solid #eee;
    background: #fdfdfd;
    display: flex;
    flex-direction: column;
    transition: 0.3s;
}

.case-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    border-color: var(--aoi-red);
}

.case-image {
    width: 100%;
    height: 280px; /* Increased height for full view */
    background-color: #f9f9f9;
    background-size: contain; /* Show full image without cropping */
    background-repeat: no-repeat;
    background-position: center;
    border-bottom: 1px solid #eee;
}

.case-body {
    padding: 25px;
}

.case-body h4 {
    margin: 0 0 15px 0;
    color: var(--aoi-red);
    font-size: 1.1rem;
    text-transform: uppercase;
}

.case-specs {
    margin: 0 0 20px 0;
    padding: 0;
    list-style: none;
    font-size: 0.85rem;
    color: #555;
}

.case-specs li {
    margin-bottom: 8px;
    padding-left: 15px;
    position: relative;
}

.case-specs li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--aoi-red);
}

.case-region {
    font-size: 0.75rem;
    font-weight: 700;
    color: #999;
    text-transform: uppercase;
    display: flex;
    align-items: center;
}

.case-region::before {
    content: '📍';
    margin-right: 5px;
}