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

:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-border: #2a2a2a;
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Source Sans 3', -apple-system, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-weight: 300;
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1.5rem 3rem;
    background: linear-gradient(to bottom, var(--color-bg), transparent);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    height: 32px;
    width: 32px;
    opacity: 0.9;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
}

.hero-icon {
    width: 120px;
    height: 120px;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero h1 {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.tagline {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 500px;
    letter-spacing: 0.02em;
}

/* About Section */
.about {
    padding: 6rem 2rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about h2 {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

.about p {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-text);
}

/* Ventures Section */
.ventures {
    padding: 6rem 2rem 4rem;
    text-align: center;
}

.ventures h2 {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 3rem;
}

.logo-marquee {
    overflow: hidden;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}

.logo-track {
    display: flex;
    animation: marquee 32s linear infinite;
}

.logo-set {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo-set img {
    height: 44px;
    width: auto;
    margin: 0 3rem;
    opacity: 0.6;
    filter: grayscale(100%) brightness(1.3);
    flex-shrink: 0;
    transition: opacity 0.3s ease, filter 0.3s ease;
}

.logo-set img:hover {
    opacity: 1;
    filter: grayscale(0%) brightness(1);
}

.logo-set img.logo-kaizen {
    height: 58px;
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* Industries Section */
.industries {
    padding: 4rem 2rem 6rem;
    max-width: 900px;
    margin: 0 auto;
}

.industries h2 {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 3rem;
    text-align: center;
}

.industries-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.industry-item {
    padding: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.industry-item:last-child {
    border-bottom: none;
}

.industry-item h3 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    margin-bottom: 0.5rem;
}

.industry-item p {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.6;
}

/* Contact Section */
.contact {
    padding: 6rem 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.contact h2 {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 3rem;
    text-align: center;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 1rem;
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #444;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form button {
    background: var(--color-text);
    color: var(--color-bg);
    border: none;
    padding: 1rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: opacity 0.3s ease;
    margin-top: 1rem;
}

.contact-form button:hover {
    opacity: 0.85;
}

.contact-form button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-status {
    margin-top: 1rem;
    font-size: 0.9rem;
    text-align: center;
}

.form-status.success {
    color: #4ade80;
}

.form-status.error {
    color: #f87171;
}

/* Footer */
footer {
    padding: 4rem 2rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
    margin-top: 4rem;
}

.footer-logo {
    height: 28px;
    width: 28px;
    opacity: 0.6;
    margin-bottom: 1.5rem;
}

footer p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 1rem 1.5rem;
    }

    .hero-icon {
        width: 80px;
        height: 80px;
    }

    .about,
    .portfolio {
        padding: 4rem 1.5rem;
    }

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

    .logo-track {
        animation-duration: 20s;
    }

    .logo-set img {
        height: 32px;
        margin: 0 1.5rem;
    }

    .logo-set img.logo-kaizen {
        height: 42px;
    }
}