/* ========================================
   NESTRIX - Modern Monochrome Design
   ======================================== */

/* ========== CSS Variables ========== */
:root {
    /* Colors */
    --color-black: #1a1a1a;
    --color-dark-grey: #2a2a2a;
    --color-medium-grey: #666666;
    --color-light-grey: #f5f5f5;
    --color-border: #e0e0e0;
    --color-orange: #ff6b35;
    --color-orange-hover: #e55a2b;
    --color-white: #ffffff;
    
    /* Typography */
    --font-ja: 'Noto Sans JP', sans-serif;
    --font-en: 'Inter', sans-serif;
    --font-size-base: 15px;
    --font-size-small: 13px;
    --font-size-large: 18px;
    --line-height: 1.8;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Layout */
    --container-width: 1200px;
    --header-height: 70px;
    
    /* Effects */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-ja);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-dark-grey);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== Container ========== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========== Header ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    text-decoration: none;
}

.logo-text {
    font-family: var(--font-en);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-black);
}

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

.nav-link {
    font-size: var(--font-size-small);
    font-weight: 500;
    color: var(--color-dark-grey);
    text-decoration: none;
    letter-spacing: 0.5px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-black);
}

/* Remove orange underline completely */
.nav-link::after,
.nav-link::before {
    display: none !important;
    content: none !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-black);
    transition: var(--transition);
}

/* ========== Hero ========== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-color: #1a1a2e;
    background-image: url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(26, 26, 26, 0.85) 0%,
        rgba(26, 26, 26, 0.6) 50%,
        rgba(26, 26, 26, 0.4) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-title {
    font-family: var(--font-ja);
    font-size: 52px;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
}

.hero-title .accent {
    color: var(--color-orange);
}

.hero-subtitle {
    font-size: var(--font-size-large);
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-line {
    display: block;
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.6));
    margin: 0 auto;
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { opacity: 0; transform: scaleY(0); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
    100% { opacity: 0; transform: scaleY(1); transform-origin: bottom; }
}

/* ========== Buttons ========== */
.btn {
    display: inline-block;
    padding: 14px 36px;
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    letter-spacing: 0.5px;
    border-radius: 2px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--color-orange);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-orange-hover);
    transform: translateY(-1px);
}

.btn-large {
    padding: 18px 48px;
    font-size: 16px;
    min-width: 280px;
    text-align: center;
}

/* ========== Sections ========== */
.section {
    padding: var(--spacing-xl) 0;
}

.section-alt {
    background-color: var(--color-light-grey);
}

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

.section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 1px;
}

.section-description {
    font-size: var(--font-size-base);
    color: var(--color-medium-grey);
    line-height: 1.8;
}

/* ========== Vision Section ========== */
.vision-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.vision-headline {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.vision-word {
    font-family: var(--font-en);
    font-size: 32px;
    font-weight: 700;
    color: var(--color-black);
}

.vision-plus,
.vision-equals {
    font-family: var(--font-en);
    font-size: 28px;
    font-weight: 300;
    color: var(--color-medium-grey);
}

.vision-result {
    font-family: var(--font-en);
    font-size: 32px;
    font-weight: 700;
    color: var(--color-orange);
}

.vision-text {
    font-size: var(--font-size-base);
    color: var(--color-medium-grey);
    line-height: 1.9;
}

.vision-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.vision-feature {
    padding: var(--spacing-md);
    border-left: 3px solid var(--color-orange);
    background-color: var(--color-light-grey);
}

.vision-feature h4 {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.vision-feature p {
    font-size: var(--font-size-small);
    color: var(--color-medium-grey);
    line-height: 1.7;
}

/* ========== Services Section ========== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

/* Service Card with Decorative Design */
.service-card {
    height: 100%;
    background-color: var(--color-white);
    border: 2px solid var(--color-border);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--color-orange) 0%, var(--color-dark-grey) 100%);
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--color-orange);
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.service-card:hover::before {
    width: 6px;
}

.service-card-inner {
    padding: var(--spacing-lg);
    position: relative;
}

.service-number {
    font-family: var(--font-en);
    font-size: 64px;
    font-weight: 700;
    color: var(--color-light-grey);
    position: absolute;
    top: 10px;
    right: 20px;
    line-height: 1;
    z-index: 0;
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.service-description {
    font-size: var(--font-size-base);
    color: var(--color-medium-grey);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.service-features {
    list-style: none;
    padding: 0;
    position: relative;
    z-index: 1;
}

.service-features li {
    font-size: var(--font-size-small);
    color: var(--color-dark-grey);
    padding: var(--spacing-xs) 0;
    padding-left: 20px;
    position: relative;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-orange);
    font-weight: 700;
}

/* Coming Soon Badge */
.coming-soon-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background-color: var(--color-orange);
    color: var(--color-white);
    font-family: var(--font-en);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    padding: 4px 10px;
    border-radius: 2px;
    z-index: 2;
    text-transform: uppercase;
}

/* ========== Strengths (inside Services Section) ========== */
.strengths-wrapper {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.strengths-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.strength-divider {
    width: 40px;
    height: 2px;
    background-color: var(--color-orange);
    margin: 0 auto var(--spacing-lg);
}

.strength-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.strength-item {
    text-align: left;
    background-color: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.strength-item:hover {
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.10);
    transform: translateY(-2px);
}

.strength-number {
    font-family: var(--font-en);
    font-size: 48px;
    font-weight: 700;
    color: var(--color-orange);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.strength-title {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.strength-description {
    font-size: var(--font-size-small);
    color: var(--color-medium-grey);
    line-height: 1.7;
}

/* ========== Company Section ========== */
.company-info {
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.company-table {
    width: 100%;
    border-collapse: collapse;
}

.company-table th,
.company-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    vertical-align: top;
}

.company-table th {
    width: 120px;
    font-size: var(--font-size-small);
    font-weight: 700;
    color: var(--color-medium-grey);
    white-space: nowrap;
}

.company-table td {
    font-size: var(--font-size-base);
    color: var(--color-dark-grey);
}

.members-section {
    max-width: 800px;
    margin: 0 auto;
}

.members-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.members-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.member-item {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-white);
}

.member-name-role {
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-orange);
}

.member-name {
    font-size: var(--font-size-large);
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 4px;
}

.member-role {
    font-size: var(--font-size-small);
    color: var(--color-medium-grey);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.member-description {
    font-size: var(--font-size-small);
    color: var(--color-dark-grey);
    line-height: 1.7;
}

/* ========== Contact Section ========== */
.contact-cta {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

/* ========== Footer ========== */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    font-family: var(--font-en);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-white);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.footer-tagline {
    font-size: var(--font-size-small);
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: var(--font-size-small);
    color: rgba(255, 255, 255, 0.4);
}

/* ========== Scroll Animations ========== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .vision-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .strength-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--color-white);
        border-top: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-md) 0;
        gap: 0;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-sm) var(--spacing-md);
        border-bottom: 1px solid var(--color-light-grey);
    }

    .nav-link::after,
    .nav-link::before {
        display: none !important;
        content: none !important;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .vision-headline {
        font-size: 24px;
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .vision-features {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .strength-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .company-table th {
        width: 100px;
        font-size: var(--font-size-small);
    }
    
    .members-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2.5rem;
        --spacing-xl: 3rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .btn {
        padding: 12px 28px;
        font-size: 13px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}