/* ==========================================
   KANATA - 一般社団法人
   REBIRTH PROJECT Style
   ========================================== */

/* CSS Variables */
:root {
    /* Monochrome Colors */
    --color-black: #1a1a1a;
    --color-dark: #333333;
    --color-gray: #666666;
    --color-gray-light: #999999;
    --color-gray-lighter: #cccccc;
    --color-bg: #f5f5f5;
    --color-white: #ffffff;

    /* Typography */
    --font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Noto Serif JP', 'Times New Roman', Georgia, serif;
    --font-en: 'Times New Roman', Georgia, serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 10rem;

    /* Layout */
    --container-width: 1400px;
    --content-width: 900px;
    --sidebar-width: 80px;
    --header-height: 80px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;
}

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

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

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 2;
    color: var(--color-dark);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

a:hover {
    opacity: 0.7;
}

ul {
    list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 400;
    line-height: 1.4;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-narrow {
    max-width: var(--content-width);
}

/* ==========================================
   Header
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: transparent;
    z-index: 1000;
    transition: background-color var(--transition-normal);
}

.header.scrolled {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-lighter);
}

.header.scrolled .logo-icon {
    border-color: var(--color-black);
    color: var(--color-black);
}

.header.scrolled .logo-text {
    color: var(--color-black);
}

.header.scrolled .nav-link {
    color: var(--color-dark);
}

.header.scrolled .menu-toggle span {
    background-color: var(--color-black);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    border: 2px solid var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-white);
    transition: all var(--transition-normal);
}

.logo-text {
    font-family: var(--font-en);
    font-size: 1.25rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    color: var(--color-white);
    transition: color var(--transition-normal);
}

.logo-sub {
    display: none;
}

/* Navigation */
.nav-list {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.8125rem;
    letter-spacing: 0.1em;
    color: var(--color-white);
    transition: color var(--transition-normal);
}

/* Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 1px;
    background-color: var(--color-white);
    transition: all var(--transition-normal);
}

/* ==========================================
   Page Layout with Sidebar
   ========================================== */
.page-wrapper {
    display: flex;
    min-height: 100vh;
    padding-top: var(--header-height);
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: var(--header-height);
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg) 0;
    border-right: 1px solid var(--color-gray-lighter);
    background-color: var(--color-white);
    z-index: 100;
}

.sidebar-icon {
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-black);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.sidebar-icon svg {
    width: 20px;
    height: 20px;
}

/* Vertical Text */
.vertical-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    color: var(--color-gray);
    margin-top: auto;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
}

/* ==========================================
   Hero Section - Full Background Image
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    /* Full width - compensate for sidebar margin */
    margin-left: calc(-1 * var(--sidebar-width));
    width: calc(100% + var(--sidebar-width));
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.3) 0%,
        rgba(0, 0, 0, 0.5) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
    max-width: 900px;
}

.hero-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.hero-label-icon {
    width: 24px;
    height: 24px;
    border: 1px solid var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
}

.hero-label-text {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.8);
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.hero-title-en {
    display: block;
    font-family: var(--font-en);
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 400;
    letter-spacing: 0.05em;
    line-height: 1.1;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-title-ja {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.9);
    margin-top: var(--spacing-md);
}

.hero-description {
    font-size: 1rem;
    line-height: 2.4;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--spacing-lg);
    margin-left: auto;
    margin-right: auto;
    max-width: 600px;
}

/* ==========================================
   Section Styles - REBIRTH Style
   ========================================== */
.section {
    padding: var(--spacing-xxl) 0;
    border-top: 1px solid var(--color-gray-lighter);
}

.section-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.section-icon {
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-black);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.section-icon svg {
    width: 20px;
    height: 20px;
}

.section-titles {
    flex: 1;
}

.section-label {
    font-size: 0.6875rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-gray);
    margin-bottom: var(--spacing-xs);
}

.section-title-en {
    font-family: var(--font-en);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 400;
    letter-spacing: 0.05em;
    line-height: 1.2;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
}

.section-title-ja {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    color: var(--color-dark);
}

/* Content Layout */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.content-text {
    font-size: 0.9375rem;
    line-height: 2.4;
    color: var(--color-gray);
}

.content-text p {
    margin-bottom: var(--spacing-md);
}

.content-text p:last-child {
    margin-bottom: 0;
}

.content-lead {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    line-height: 2.2;
    color: var(--color-dark);
    margin-bottom: var(--spacing-lg);
}

/* ==========================================
   Mission Section
   ========================================== */
.mission {
    background-color: var(--color-white);
}

.mission-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.mission-text {
    padding-right: var(--spacing-lg);
}

.mission-values {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.value-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-gray-lighter);
}

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

.value-number {
    font-family: var(--font-en);
    font-size: 0.875rem;
    color: var(--color-gray-light);
    min-width: 30px;
}

.value-content h3 {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    letter-spacing: 0.1em;
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.value-content p {
    font-size: 0.875rem;
    color: var(--color-gray);
    line-height: 1.8;
}

/* ==========================================
   Projects Section
   ========================================== */
.projects-preview {
    background-color: var(--color-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.project-card {
    background-color: var(--color-white);
    transition: all var(--transition-normal);
}

.project-card:hover {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.project-card-image {
    aspect-ratio: 16/10;
    overflow: hidden;
    background-color: var(--color-black);
}

.project-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.project-card-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-family: var(--font-en);
    font-size: 1.5rem;
    letter-spacing: 0.1em;
}

.project-card-content {
    padding: var(--spacing-lg);
}

.project-card-label {
    font-size: 0.6875rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
}

.project-card-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    letter-spacing: 0.05em;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.project-card-description {
    font-size: 0.875rem;
    line-height: 2;
    color: var(--color-gray);
}

/* ==========================================
   News Section
   ========================================== */
.news {
    background-color: var(--color-white);
}

.news-list {
    border-top: 1px solid var(--color-gray-lighter);
}

.news-item {
    display: grid;
    grid-template-columns: 120px 100px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-gray-lighter);
    align-items: center;
    transition: background-color var(--transition-fast);
}

.news-item:hover {
    background-color: var(--color-bg);
}

.news-date {
    font-family: var(--font-en);
    font-size: 0.8125rem;
    color: var(--color-gray);
}

.news-category {
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    color: var(--color-gray);
}

.news-title {
    font-size: 0.9375rem;
    color: var(--color-dark);
}

/* ==========================================
   CTA Section
   ========================================== */
.cta {
    background-color: var(--color-black);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-xxl) 0;
}

.cta-title {
    font-family: var(--font-en);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 400;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 0.9375rem;
    line-height: 2;
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    font-size: 0.8125rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    border: 1px solid currentColor;
    background: transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    color: var(--color-black);
    border-color: var(--color-black);
}

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

.btn-white {
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-white:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background-color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--color-gray-lighter);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo-icon {
    width: 32px;
    height: 32px;
    border: 1px solid var(--color-black);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.625rem;
}

.footer-logo-text {
    font-family: var(--font-en);
    font-size: 1rem;
    letter-spacing: 0.1em;
}

.footer-description {
    font-size: 0.75rem;
    color: var(--color-gray);
    margin-top: var(--spacing-sm);
    line-height: 1.8;
}

.footer-nav h3,
.footer-contact h3 {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

.footer-nav ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-nav a {
    font-size: 0.8125rem;
    color: var(--color-dark);
}

.footer-contact p {
    font-size: 0.8125rem;
    color: var(--color-dark);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-lighter);
}

.copyright {
    font-size: 0.6875rem;
    color: var(--color-gray);
    letter-spacing: 0.05em;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    font-size: 0.6875rem;
    color: var(--color-gray);
}

/* ==========================================
   Page Header
   ========================================== */
.page-header {
    padding: calc(var(--header-height) + var(--spacing-xxl)) 0 var(--spacing-xl);
    background-color: var(--color-white);
}

.page-header .container {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
}

.page-header-icon {
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-black);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.page-title-en {
    font-family: var(--font-en);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 400;
    letter-spacing: 0.05em;
    line-height: 1.1;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
}

.page-title-ja {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    color: var(--color-gray);
}

/* ==========================================
   About Page
   ========================================== */
.about-intro {
    background-color: var(--color-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.about-text h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    color: var(--color-black);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.about-image {
    aspect-ratio: 4/3;
    background-color: var(--color-bg);
}

/* Philosophy Section */
.philosophy {
    background-color: var(--color-bg);
}

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

.philosophy-item {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
}

.philosophy-number {
    font-family: var(--font-en);
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--color-gray-lighter);
    margin-bottom: var(--spacing-sm);
}

.philosophy-item h3 {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    letter-spacing: 0.1em;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
}

.philosophy-item p {
    font-size: 0.875rem;
    line-height: 2;
    color: var(--color-gray);
}

/* ==========================================
   Projects Page
   ========================================== */
.project-detail {
    padding: var(--spacing-xxl) 0;
    border-bottom: 1px solid var(--color-gray-lighter);
}

.project-detail:last-of-type {
    border-bottom: none;
}

.project-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.project-detail:nth-child(even) .project-detail-content {
    direction: rtl;
}

.project-detail:nth-child(even) .project-detail-content > * {
    direction: ltr;
}

.project-detail-image {
    aspect-ratio: 16/10;
    background-color: var(--color-black);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
}

.project-detail-image .iki-logo {
    font-family: var(--font-en);
    font-size: 3rem;
    letter-spacing: 0.1em;
}

.project-detail-text .section-label {
    margin-bottom: var(--spacing-sm);
}

.project-detail-text h2 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    letter-spacing: 0.05em;
    color: var(--color-black);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.project-detail-text p {
    font-size: 0.9375rem;
    line-height: 2.2;
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
}

.project-features {
    margin-top: var(--spacing-lg);
}

.project-features li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-gray);
}

.project-features li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-gray-light);
}

/* ==========================================
   Contact Page
   ========================================== */
.contact-section {
    background-color: var(--color-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-info h2 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    letter-spacing: 0.1em;
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    font-size: 0.9375rem;
    line-height: 2;
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
}

.contact-details {
    margin-top: var(--spacing-xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-item-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    color: var(--color-gray);
}

.contact-item-content h3 {
    font-size: 0.6875rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gray);
    margin-bottom: var(--spacing-xs);
}

.contact-item-content p {
    margin-bottom: 0;
    color: var(--color-dark);
}

/* Contact Form */
.contact-form {
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-gray);
    margin-bottom: var(--spacing-xs);
}

.form-label .required {
    color: var(--color-dark);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--color-dark);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-lighter);
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-black);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-submit {
    width: 100%;
    margin-top: var(--spacing-sm);
}

/* FAQ Section */
.faq {
    background-color: var(--color-bg);
}

.faq-list {
    max-width: 800px;
}

.faq-item {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.faq-question {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.faq-question::before {
    content: 'Q.';
    font-family: var(--font-en);
    color: var(--color-gray);
    flex-shrink: 0;
}

.faq-answer {
    font-size: 0.875rem;
    line-height: 2;
    color: var(--color-gray);
    padding-left: 2rem;
}

/* ==========================================
   Company Info Table
   ========================================== */
.company-info {
    background-color: var(--color-white);
}

.info-table {
    width: 100%;
    max-width: 800px;
}

.info-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-gray-lighter);
}

.info-label {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--color-gray);
}

.info-value {
    font-size: 0.9375rem;
    color: var(--color-dark);
}

/* ==========================================
   Animations
   ========================================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1200px) {
    :root {
        --sidebar-width: 60px;
    }
}

@media (max-width: 1024px) {
    .hero-inner,
    .mission-content,
    .about-content,
    .project-detail-content,
    .contact-content,
    .content-grid {
        grid-template-columns: 1fr;
    }

    .project-detail:nth-child(even) .project-detail-content {
        direction: ltr;
    }

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

    .philosophy-list {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 6rem;
        --sidebar-width: 0px;
    }

    .sidebar {
        display: none;
    }

    .main-content {
        margin-left: 0;
    }

    /* Hero - Mobile */
    .hero {
        background-attachment: scroll;
        background-position: center center;
    }

    .hero-label {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .hero-label-text {
        font-size: 0.65rem;
        text-align: center;
    }

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

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

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

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--color-white);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: right var(--transition-normal);
    }

    .nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }

    .nav-link {
        font-size: 1rem;
        color: var(--color-dark);
    }

    .menu-toggle span {
        background-color: var(--color-white);
    }

    .menu-toggle.active span {
        background-color: var(--color-black);
    }

    /* News */
    .news-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }

    .news-date,
    .news-category {
        font-size: 0.75rem;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    /* Page Header */
    .page-header .container {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .btn {
        width: 100%;
    }

    .info-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
}