/* Global Reset & Base Styles */
:root {
    --bg-color: #050505;
    --text-color: #f0f0f0;
    --accent-color: #ffffff;
    --gray-color: #888888;
    --card-bg: #111111;
    --font-main: 'Inter', 'Noto Sans JP', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

/* Typography */
h1,
h2,
h3 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 4rem;
    margin-bottom: 2rem;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--gray-color);
}

/* Menu Toggle (Desktop Hidden) */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.menu-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: #fff;
    margin: 3px 0;
    transition: 0.4s;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(10px);
}

/* MINIMAL LOGO DESIGN */
.logo {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    word-spacing: 0.2em;
    background: linear-gradient(to right, #ffffff, #888888);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav ul {
    display: flex;
    gap: 2rem;
}

nav a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-color);
}

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

/* Sections */
/* Sections */
section {
    padding: 8rem 5%;
}

/* Hero Section */
#hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding-top: 0;
}

#hero h1 {
    background: linear-gradient(to right, #fff, #888);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.9rem;
    margin-top: 2rem;
    transition: all 0.3s ease;
}

.cta-button:hover {
    background: var(--accent-color);
    color: var(--bg-color);
}

/* Services Section */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.service-card {
    background: var(--card-bg);
    padding: 3rem;
    border: 1px solid #222;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: #333;
}

.service-card h3 {
    margin-bottom: 1rem;
}

/* Demos Section */
#demos h2 {
    text-align: center;
    margin-bottom: 4rem;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.demo-card {
    position: relative;
    overflow: hidden;
    /* Height auto to allow text below */
    height: auto;
    border-radius: 4px;
    /* Slightly rounded corners for better feel */
    cursor: pointer;
    transition: transform 0.3s ease;
}

.demo-link-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: rgba(255, 255, 255, 0.9);
    color: #000;
    padding: 0.8rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 10;
    pointer-events: none;
    /* Let clicks pass through to the anchor */
    border-radius: 2px;
}

.demo-card:hover .demo-link-label {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.demo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease, filter 0.3s ease;
    filter: brightness(0.8);
}

.demo-card:hover img {
    transform: scale(1.05);
    filter: brightness(0.4);
    /* Darken image to make button pop */
}

.demo-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.3s ease;
}

.demo-card:hover .demo-info {
    transform: translateY(0);
    opacity: 1;
}

.demo-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.5rem;
}

.demo-type {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    color: #ccc;
}

/* Contact Section */
#contact {
    text-align: center;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--gray-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: var(--card-bg);
    border: 1px solid #333;
    color: #fff;
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-color);
}

/* Footer */
footer {
    padding: 3rem 5%;
    text-align: center;
    border-top: 1px solid #222;
    color: var(--gray-color);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    header {
        padding: 1.5rem 5%;
    }

    /* Mobile Navigation */
    .menu-toggle {
        display: flex;
        z-index: 1001;
        /* Above nav menu */
    }

    .nav-menu {
        position: fixed;
        right: -100%;
        top: 0;
        height: 100vh;
        width: 100%;
        background-color: rgba(5, 5, 5, 0.95);
        backdrop-filter: blur(10px);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: 0.3s ease-in-out;
        z-index: 1000;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu ul {
        flex-direction: column;
        align-items: center;
        gap: 2.5rem;
    }

    .nav-menu a {
        font-size: 1.5rem;
        color: #fff;
    }

    /* Animate Hamburger */
    .menu-toggle.is-active .bar:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .menu-toggle.is-active .bar:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.is-active .bar:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    section {
        padding: 5rem 5%;
    }

    /* Grid Fixes */
    .service-grid,
    .demo-grid {
        grid-template-columns: 1fr;
        /* Force single column */
    }

    /* Mobile Demo Card - Always show label */
    .demo-link-label {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
        background: rgba(255, 255, 255, 0.8);
        padding: 0.6rem 1.2rem;
        font-size: 0.8rem;
    }

    .demo-card img {
        filter: brightness(0.6);
        /* Slightly darker by default on mobile */
    }
}