/* 
   ========================================
   Syncodo Inc. Corporate Site Styles
   ========================================
*/

:root {
    /* Color Palette */
    --color-bg-base: #1c1a18;
    --color-bg-surface: #262320;
    --color-text-main: #e8e4dc;
    --color-text-muted: #969188;
    
    /* Gold Accents */
    --color-gold: #d4af37;
    --color-gold-dark: #b5952f;
    --color-gold-light: #f3df8a;

    /* Spotlight colors */
    --color-spotlight-center: #3d372d;
    --color-spotlight-edge: #13110f;

    /* Typography */
    --font-sans: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;

    /* Layout (間 - Ma) */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    --spacing-xxl: 12rem;
}

/* 
   ========================================
   Reset & Base Styles
   ========================================
*/
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--color-bg-base);
    color: var(--color-text-main);
    font-family: var(--font-sans);
    line-height: 1.8;
    letter-spacing: 0.05em;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

/* 
   ========================================
   Texture Overlay (Tone & Manner)
   ========================================
*/
body::after {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
    /* Increased baseFrequency for finer paper-like grain */
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.5' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='1 0 0 0 0, 1 0 0 0 0, 1 0 0 0 0, 0 0 0 1 0' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.12;
    mix-blend-mode: overlay;
}

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

a:hover {
    color: var(--color-gold);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 
   ========================================
   Typography & Utils
   ========================================
*/
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 400;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--color-gold);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.2em;
}

.section-header .en {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* 
   ========================================
   Header
   ========================================
*/
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
}

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

.logo-img {
    height: 36px;
    width: auto;
    display: block;
}

.global-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.global-nav a {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* 
   ========================================
   Hero Section
   ========================================
*/
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: url('assets/syncodo-logo.png') center center / cover no-repeat;
}



.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.7;
}

.scroll-indicator span {
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.scroll-indicator::after {
    content: '';
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-gold), transparent);
    animation: scroll-line 2s infinite ease-in-out;
}

@keyframes scroll-line {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* 
   ========================================
   About Section
   ========================================
*/
.about-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.about .lead {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    line-height: 2;
    margin-bottom: var(--spacing-lg);
    color: var(--color-gold-light);
}

.about .desc {
    font-size: 1.05rem;
    color: var(--color-text-main);
    opacity: 0.9;
}

/* 
   ========================================
   Business Section
   ========================================
*/
.business-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.business-item {
    display: flex;
    align-items: stretch;
    background: var(--color-bg-surface);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border: 1px solid rgba(212, 175, 55, 0.1);
    transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
}

.business-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.7);
    border-color: rgba(212, 175, 55, 0.3);
}

.business-item:nth-child(even) {
    flex-direction: row-reverse;
}

.business-image {
    flex: 1;
    min-height: 300px;
    background: radial-gradient(circle at center, var(--color-spotlight-center) 0%, var(--color-spotlight-edge) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.business-image img {
    max-height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 0 15px rgba(212,175,55,0.1));
}

.placeholder-image {
    background: linear-gradient(135deg, #1a1a1a, #0a0a0a);
}

.placeholder-icon {
    font-size: 4rem;
    filter: grayscale(100%) brightness(200%);
    opacity: 0.5;
}

.business-text {
    flex: 1.2;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.business-text h3 {
    font-size: 1.8rem;
    color: var(--color-gold);
    margin-bottom: var(--spacing-xs);
}

.business-text .business-name {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.1em;
}

/* 
   ========================================
   Company Section
   ========================================
*/
.company-table {
    background: var(--color-bg-surface);
    border-radius: 8px;
    padding: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.company-table dl {
    display: flex;
    flex-wrap: wrap;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.company-table dt {
    width: 30%;
    padding: var(--spacing-md) 0;
    font-weight: 500;
    color: var(--color-gold);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.company-table dd {
    width: 70%;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.company-table ul {
    list-style-type: none;
}

.company-table ul li {
    position: relative;
    padding-left: 1rem;
    margin-bottom: 0.5rem;
}

.company-table ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.7rem;
    width: 4px;
    height: 4px;
    background-color: var(--color-gold);
    border-radius: 50%;
}

/* 
   ========================================
   Contact Section
   ========================================
*/
.contact {
    text-align: center;
    padding-bottom: var(--spacing-xxl);
}

.contact-content p {
    margin-bottom: var(--spacing-lg);
}

.btn-gold {
    display: inline-block;
    padding: 1rem 3rem;
    background-color: transparent;
    color: var(--color-gold);
    border: 1px solid var(--color-gold);
    border-radius: 4px;
    font-size: 1rem;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-gold:hover {
    background-color: var(--color-gold);
    color: var(--color-bg-base);
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.4);
}


/* 
   ========================================
   Footer
   ========================================
*/
.footer {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer-logo {
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: center;
}

.footer-logo-img {
    height: 24px;
    width: auto;
    display: block;
}

.copyright {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

/* 
   ========================================
   Animations & Interactivity
   ========================================
*/
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.2, 0.8, 0.2, 1), transform 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-up {
    animation: fadeInUp 1.5s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 
   ========================================
   Responsive Adjustments
   ========================================
*/
.sp-only {
    display: none;
}

@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 6rem;
    }

    .sp-only {
        display: block;
    }

    .header-inner {
        padding: var(--spacing-sm) var(--spacing-sm);
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .global-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.8rem;
    }

    .global-nav a {
        font-size: 0.8rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .about .lead {
        font-size: 1.4rem;
    }

    .business-item, .business-item:nth-child(even) {
        flex-direction: column;
    }

    .company-table dt, .company-table dd {
        width: 100%;
        padding: var(--spacing-sm) 0;
    }

    .company-table dt {
        border-bottom: none;
        padding-bottom: 0;
    }
}