/* ===================================
   ISHIHARA USA — Stylesheet
   Charcoal + Coral | Minimalist
   =================================== */

:root {
    --charcoal: #1a1a1a;
    --charcoal-light: #2d2d2d;
    --charcoal-mid: #4a4a4a;
    --coral: #FF6B6B;
    --coral-dark: #e85555;
    --coral-light: #ff8a8a;
    --white: #ffffff;
    --off-white: #fafafa;
    --cream: #f5f3f0;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 10px 10px -5px rgba(0,0,0,0.03);
}

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

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

body {
    font-family: var(--font-sans);
    font-weight: 300;
    color: var(--charcoal);
    background: var(--white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===================================
   NAVIGATION
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-mark {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--charcoal);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--charcoal);
    letter-spacing: -0.02em;
}

.logo-text {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--gray-600);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--coral);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--charcoal);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Mobile menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 1.5px;
    background: var(--charcoal);
    transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 4px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -4px);
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border: 1.5px solid transparent;
    border-radius: 0;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--charcoal-light);
    border-color: var(--charcoal-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--charcoal);
    border-color: var(--charcoal);
}

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

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
    border-color: var(--gray-300);
}

.btn-ghost:hover {
    border-color: var(--coral);
    color: var(--coral);
}

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

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

.btn-full {
    width: 100%;
}

/* ===================================
   SECTION HEADERS
   =================================== */
.section-tag {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--coral);
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 400;
    line-height: 1.2;
    color: var(--charcoal);
    margin-bottom: 24px;
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    background: var(--white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 45%;
    height: 100%;
    background: linear-gradient(135deg, var(--cream) 0%, var(--gray-50) 100%);
    z-index: 0;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-tagline {
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--coral);
    margin-bottom: 24px;
}

.hero-headline {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4.5vw, 3.25rem);
    font-weight: 400;
    line-height: 1.15;
    color: var(--charcoal);
    margin-bottom: 28px;
    letter-spacing: -0.01em;
}

.hero-subheadline {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--gray-600);
    margin-bottom: 40px;
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 64px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 40px;
    align-items: center;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--charcoal);
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gray-500);
}

.stat-divider {
    width: 1px;
    height: 48px;
    background: var(--gray-200);
}

/* Hero Image */
.hero-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    overflow: hidden;
}

.image-wrapper img {
    width: 100%;
    height: 750px;
    object-fit: cover;
    display: block;
}

.image-accent {
    position: absolute;
    bottom: -20px;
    left: -20px;
    width: 200px;
    height: 200px;
    border: 1.5px solid var(--coral);
    z-index: -1;
}

/* ===================================
   SERVICES SECTION
   =================================== */
.services {
    padding: 120px 0;
    background: var(--white);
}

.section-header {
    margin-bottom: 72px;
}

.section-header p {
    margin-bottom: 12px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    padding: 40px 32px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--coral);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--charcoal);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

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

.service-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--coral);
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: 12px;
    color: var(--charcoal);
}

.service-card p {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--gray-600);
}

/* ===================================
   ABOUT SECTION
   =================================== */
.about {
    padding: 120px 0;
    background: var(--cream);
}

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

.about-image img {
    width: 100%;
    height: 700px;
    object-fit: cover;
    display: block;
}

.about-content .section-title {
    margin-bottom: 32px;
}

.about-text {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--gray-600);
    margin-bottom: 20px;
}

.about-values {
    margin-top: 48px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.value-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.value-icon {
    font-size: 1.25rem;
    color: var(--coral);
    line-height: 1;
    padding-top: 4px;
}

.value-item h4 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--charcoal);
}

.value-item p {
    font-size: 0.9375rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ===================================
   WHY US SECTION
   =================================== */
.why-us {
    padding: 120px 0;
    background: var(--charcoal);
    color: var(--white);
}

.why-us .section-tag {
    color: var(--coral);
}

.why-us .section-title {
    color: var(--white);
    margin-bottom: 72px;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.why-card {
    padding: 40px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
}

.why-card:hover {
    border-color: var(--coral);
    background: rgba(255,255,255,0.03);
}

.why-number {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 400;
    color: var(--coral);
    line-height: 1;
    margin-bottom: 20px;
    display: block;
}

.why-card h3 {
    font-family: var(--font-serif);
    font-size: 1.375rem;
    font-weight: 400;
    margin-bottom: 12px;
    color: var(--white);
}

.why-card p {
    font-size: 0.9375rem;
    line-height: 1.75;
    color: rgba(255,255,255,0.6);
}

/* ===================================
   CTA SECTION
   =================================== */
.cta {
    padding: 120px 0;
    background: var(--coral);
    text-align: center;
}

.cta-content .section-tag {
    color: rgba(255,255,255,0.8);
    margin-bottom: 20px;
}

.cta-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 400;
    color: var(--white);
    margin-bottom: 20px;
    line-height: 1.2;
}

.cta-text {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 40px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact {
    padding: 120px 0;
    background: var(--white);
}

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

.contact-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--gray-600);
    margin-bottom: 48px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-item svg {
    color: var(--coral);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gray-400);
    margin-bottom: 4px;
}

.contact-value {
    font-size: 1rem;
    color: var(--charcoal);
    line-height: 1.6;
}

.contact-value a:hover {
    color: var(--coral);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--gray-50);
    padding: 48px;
    border: 1px solid var(--gray-200);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gray-600);
}

.form-group input,
.form-group select,
.form-group textarea {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    padding: 14px 16px;
    border: 1px solid var(--gray-300);
    background: var(--white);
    color: var(--charcoal);
    transition: var(--transition);
    outline: none;
    border-radius: 0;
    -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--coral);
    box-shadow: 0 0 0 3px rgba(255,107,107,0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-400);
}

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

.form-success {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
    font-size: 0.9375rem;
    margin-top: 8px;
}

.form-success svg {
    color: #22c55e;
    flex-shrink: 0;
}

.form-success.show {
    display: flex;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background: var(--charcoal);
    color: var(--white);
    padding: 80px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    padding-bottom: 64px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-brand .logo-mark {
    color: var(--white);
    border-color: var(--white);
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-brand p {
    font-size: 0.9375rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.7;
    max-width: 280px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-col a {
    display: block;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.5);
    padding: 6px 0;
    transition: var(--transition);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px 0;
    gap: 24px;
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.4);
}

/* ===================================
   ANIMATIONS
   =================================== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 1024px) {
    .hero-container {
        gap: 48px;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-container {
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 32px 24px;
        gap: 24px;
        border-bottom: 1px solid var(--gray-200);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero::before {
        width: 100%;
        opacity: 0.5;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .hero-image {
        order: -1;
    }
    
    .image-wrapper img {
        height: 400px;
    }
    
    .image-accent {
        display: none;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .services {
        padding: 80px 0;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .about {
        padding: 80px 0;
    }
    
    .about-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image img {
        height: 400px;
    }
    
    .why-us {
        padding: 80px 0;
    }
    
    .why-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .cta {
        padding: 80px 0;
    }
    
    .contact {
        padding: 80px 0;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .contact-form-wrapper {
        padding: 32px 24px;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .hero-stats {
        flex-wrap: wrap;
    }
    
    .stat-divider {
        display: none;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}