/*
Theme Name: Ro Autonomous
Theme URI: https://ros.co.jp
Author: The KUROKO Engine
Author URI: https://kuroko.ros.co.jp
Description: RO合同会社 自律型コーポレートサイト - クリーンテックカンパニーデザイン
Version: 2.1.0
Requires at least: 6.0
Tested up to: 6.9
Requires PHP: 8.0
License: Proprietary
Text Domain: ro-autonomous
*/

/* ============================================================
   Design Tokens
   ============================================================ */
:root {
    --bg: #fafbfd;
    --bg-alt: #f1f4f9;
    --bg-card: #ffffff;
    --border: #e2e8f0;
    --border-light: #eef2f7;
    --text: #0f172a;
    --text-dim: #475569;
    --text-muted: #94a3b8;
    --accent: #2563eb;
    --accent-light: #3b82f6;
    --accent-dim: rgba(37, 99, 235, 0.08);
    --accent-glow: rgba(37, 99, 235, 0.15);
    --white: #ffffff;
    --dark: #0f172a;
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
    --font-mono: 'Space Mono', monospace;
    --font-label: 'Inter', sans-serif;
    --max-width: 1200px;
    --section-pad: 120px;
    --radius: 12px;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.03);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06), 0 2px 4px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);
}

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

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

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 40px;
}

/* ============================================================
   Typography
   ============================================================ */
.heading-xl {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 700;
    letter-spacing: -2px;
    line-height: 1.1;
    color: var(--text);
}

.heading-lg {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.2;
    color: var(--text);
}

.heading-md {
    font-family: var(--font-body);
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    font-weight: 600;
    line-height: 1.4;
}

.heading-sm {
    font-family: var(--font-label);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
}

.body-text {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-dim);
    line-height: 2;
}

/* ============================================================
   Header / Navigation
   ============================================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 40px;
    background: rgba(250, 251, 253, 0.85);
    backdrop-filter: blur(16px);
    transition: all 0.4s ease;
}

.site-header.scrolled {
    background: rgba(250, 251, 253, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 14px 40px;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    display: flex;
    align-items: center;
    transition: opacity 0.3s;
}

.site-logo:hover { opacity: 0.7; }

.site-logo img {
    display: block;
    height: 30px;
    width: auto;
}

/* Always show dark logo on white header */
.site-header .logo-dark { display: block; }
.site-header .logo-light { display: none; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-family: var(--font-label);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-muted);
    transition: color 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s;
    border-radius: 1px;
}

.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
    font-family: var(--font-label) !important;
    font-size: 12px !important;
    font-weight: 600 !important;
    letter-spacing: 1px !important;
    text-transform: uppercase;
    border: 1px solid var(--accent) !important;
    color: var(--accent) !important;
    padding: 8px 20px;
    border-radius: 6px;
    transition: all 0.3s !important;
}

.nav-cta:hover {
    background: var(--accent) !important;
    color: var(--white) !important;
}

.nav-cta::after { display: none !important; }

/* Mobile menu */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    margin: 5px 0;
    transition: all 0.3s;
    border-radius: 1px;
}

/* ============================================================
   Hero Section (White/Light)
   ============================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--bg);
    color: var(--text);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 40%, rgba(37, 99, 235, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 60%, rgba(99, 102, 241, 0.04) 0%, transparent 40%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 65%);
}

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

.hero-label {
    font-family: var(--font-label);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 32px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s 0.3s ease forwards;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 700;
    letter-spacing: -2px;
    line-height: 1.08;
    margin-bottom: 32px;
    color: var(--text);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s 0.5s ease forwards;
}

.hero-title .gold { color: var(--accent); }
.hero-title .thin { font-weight: 300; color: var(--text-muted); }

.hero-desc {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--text-dim);
    line-height: 2;
    max-width: 600px;
    margin-bottom: 48px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s 0.7s ease forwards;
}

.hero-actions {
    display: flex;
    gap: 16px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s 0.9s ease forwards;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-label);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    background: var(--accent);
    color: var(--white);
    padding: 14px 32px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.3);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-label);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    background: transparent;
    color: var(--text-dim);
    padding: 14px 32px;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-label);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    animation: float 2s ease-in-out infinite;
}

.hero-scroll::after {
    content: '';
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent), transparent);
}

@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   Mission Section
   ============================================================ */
.section {
    padding: var(--section-pad) 0;
    position: relative;
}

.section-divider {
    width: 40px;
    height: 3px;
    background: var(--accent);
    margin-bottom: 20px;
    border-radius: 2px;
}

.mission-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.mission-text .heading-sm { margin-bottom: 20px; }
.mission-text .heading-lg { margin-bottom: 32px; }

.mission-quote {
    font-family: var(--font-body);
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text);
    line-height: 2;
    padding: 24px;
    padding-left: 24px;
    border-left: 3px solid var(--accent);
    background: var(--accent-dim);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.mission-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.stat-item {
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}

.stat-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-family: var(--font-label);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-muted);
}

/* ============================================================
   Services (4 Core Engines)
   ============================================================ */
.services-header {
    text-align: center;
    margin-bottom: 64px;
}

.services-header .heading-sm { margin-bottom: 20px; }
.services-header .heading-lg { margin-bottom: 16px; }

.services-header .body-text {
    max-width: 600px;
    margin: 0 auto;
}

.engine-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

a.engine-card,
a.engine-card:hover {
    text-decoration: none;
    color: inherit;
}

.engine-card {
    display: block;
    background: var(--bg-card);
    padding: 40px 36px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.engine-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transition: transform 0.4s ease;
    border-radius: var(--radius) var(--radius) 0 0;
}

.engine-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: rgba(37, 99, 235, 0.2);
}

.engine-card:hover::before {
    transform: scaleX(1);
}

.engine-number {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.engine-name {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
    color: var(--text);
}

.engine-name-ja {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.engine-desc {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 24px;
}

.engine-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.engine-tag {
    font-family: var(--font-label);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 5px 12px;
    border-radius: 20px;
}

/* ============================================================
   Blog Section
   ============================================================ */
.blog-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 48px;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
    overflow: hidden;
}

.blog-card:hover {
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.blog-card-img {
    width: 100%;
    height: 200px;
    background: var(--bg-alt);
    overflow: hidden;
}

.blog-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s;
}

.blog-card:hover .blog-card-img img {
    transform: scale(1.05);
}

.blog-card-body {
    padding: 24px;
}

.blog-card-date {
    font-family: var(--font-label);
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.blog-card-title {
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 12px;
    color: var(--text);
}

.blog-card-excerpt {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ============================================================
   Company Section
   ============================================================ */
.company-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

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

.company-table tr {
    border-bottom: 1px solid var(--border);
}

.company-table th {
    font-family: var(--font-label);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    text-align: left;
    padding: 16px 0;
    width: 140px;
    vertical-align: top;
}

.company-table td {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-dim);
    padding: 16px 0;
}

/* ============================================================
   Contact Section
   ============================================================ */
.contact {
    background: var(--bg-alt);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-form { display: flex; flex-direction: column; gap: 24px; }

.form-group label {
    display: block;
    font-family: var(--font-label);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 1rem;
    padding: 14px 16px;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

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

.contact .stat-item {
    background: var(--bg-card);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 40px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 48px;
}

.footer-logo {
    margin-bottom: 12px;
}

.footer-logo img {
    height: 28px;
    width: auto;
}

.footer-tagline {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.4);
}

.footer-links {
    display: flex;
    gap: 48px;
}

.footer-col h4 {
    font-family: var(--font-label);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent-light);
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 8px;
    transition: color 0.3s;
}

.footer-col a:hover { color: var(--white); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-family: var(--font-label);
    font-size: 11px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.3);
    letter-spacing: 1px;
}

.footer-powered {
    color: var(--accent-light);
}

/* ============================================================
   Scroll Animations
   ============================================================ */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
    .engine-grid { grid-template-columns: 1fr; }
    .mission-grid { grid-template-columns: 1fr; gap: 48px; }
    .company-grid { grid-template-columns: 1fr; gap: 48px; }
    .contact-grid { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 768px) {
    :root { --section-pad: 80px; }
    .container { padding: 0 24px; }
    .site-header { padding: 16px 24px; }

    .nav-links { display: none; }
    .menu-toggle { display: block; }

    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: fixed;
        inset: 0;
        background: var(--bg);
        justify-content: center;
        align-items: center;
        gap: 32px;
        z-index: 999;
    }

    .nav-links.open a {
        font-size: 16px;
        color: var(--text-dim);
    }

    .hero-title { letter-spacing: -1px; }
    .hero-actions { flex-direction: column; }

    .engine-grid { grid-template-columns: 1fr; }
    .blog-grid { grid-template-columns: 1fr; }
    .mission-stats { grid-template-columns: 1fr; }
}

/* ============================================================
   WordPress Defaults
   ============================================================ */
.wp-block-image img { height: auto; }
.alignwide { max-width: var(--max-width); margin-left: auto; margin-right: auto; }
.alignfull { width: 100vw; margin-left: calc(-50vw + 50%); }
.screen-reader-text {
    clip: rect(1px,1px,1px,1px);
    position: absolute !important;
    height: 1px; width: 1px;
    overflow: hidden;
}

/* ============================================================
   Single Post / Page Styles
   ============================================================ */
.single-post-header,
.page-header-section {
    padding: 160px 0 60px;
    background: var(--bg-alt);
}

.post-content,
.page-content {
    padding: 60px 0 var(--section-pad);
}

.post-content .entry-content,
.page-content .entry-content {
    max-width: 720px;
    margin: 0 auto;
    font-family: var(--font-body);
    font-size: 1.05rem;
    line-height: 2;
    color: var(--text-dim);
}

.post-content .entry-content h2,
.post-content .entry-content h3 {
    font-family: var(--font-heading);
    color: var(--text);
    margin: 2em 0 1em;
}

.post-content .entry-content p {
    margin-bottom: 1.5em;
}

.post-content .entry-content a {
    color: var(--accent);
    text-decoration: underline;
}