/* Solar Mango - Master Design System */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

:root {
    --color-black: #0B0C10;
    --color-charcoal: #1F2833;
    --color-crimson: #9B1C1C; /* Subtle nod to Japan */
    --color-slate: #C5C6C7;
    --color-white: #FFFFFF;
    --color-light-grey: #F4F5F7;
    --color-border: #E2E8F0;
    
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-smooth: all 0.5s cubic-bezier(0.25, 1, 0.5, 1);
    --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.05);
    --shadow-deep: 0 10px 40px rgba(0, 0, 0, 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-body);
    background-color: var(--color-white);
    color: var(--color-charcoal);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 { 
    font-family: var(--font-heading); 
    color: var(--color-black); 
    font-weight: 600; 
    line-height: 1.2; 
}

p { margin-bottom: 1.5rem; font-size: 1.1rem; color: var(--color-charcoal); font-weight: 300; }
a { color: var(--color-crimson); text-decoration: none; transition: var(--transition-smooth); }
a:hover { color: var(--color-black); }

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

.container { width: 90%; max-width: 1400px; margin: 0 auto; }
.container-narrow { max-width: 900px; margin: 0 auto; }

/* Spacing & Sections */
section { padding: 8rem 0; }
.section-light { background-color: var(--color-light-grey); }
.section-dark { background-color: var(--color-black); color: var(--color-white); }
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark p { color: var(--color-white); }
.section-dark p { color: var(--color-slate); }

.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-8 { margin-bottom: 4rem; }

/* Header */
header {
    position: fixed; top: 0; left: 0; width: 100%;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000; padding: 1.5rem 0;
    transition: var(--transition-smooth);
}
.navbar { display: flex; justify-content: space-between; align-items: center; }
.nav-logo { 
    font-family: var(--font-heading); 
    font-size: 1.8rem; 
    font-weight: 700; 
    color: var(--color-black); 
    letter-spacing: 2px; 
    text-transform: uppercase;
}
.nav-logo span { color: var(--color-crimson); }
.nav-links { list-style: none; display: flex; gap: 3rem; }
.nav-links a { 
    color: var(--color-charcoal); 
    font-weight: 500; 
    font-size: 0.9rem; 
    text-transform: uppercase; 
    letter-spacing: 1px; 
    position: relative;
}
.nav-links a::after {
    content: ''; position: absolute; width: 0; height: 1px; 
    bottom: -4px; left: 0; background-color: var(--color-crimson);
    transition: var(--transition-smooth);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--color-crimson); }

/* Hamburger */
.hamburger { display: none; cursor: pointer; flex-direction: column; gap: 6px; }
.hamburger div { width: 30px; height: 2px; background-color: var(--color-black); transition: var(--transition-smooth); }

/* Hero Sections */
.hero {
    min-height: 90vh; display: flex; align-items: center; position: relative;
    background-color: var(--color-black); overflow: hidden; padding-top: 100px;
}
.hero-img {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    object-fit: cover; opacity: 0.35; z-index: 1; filter: grayscale(20%);
}
.hero-content {
    position: relative; z-index: 2; max-width: 900px; padding: 2rem 0;
}
.hero-content h1 {
    font-size: 5rem; color: var(--color-white); margin-bottom: 1.5rem; letter-spacing: -1px;
}
.hero-content p {
    font-size: 1.4rem; color: var(--color-slate); font-weight: 300; max-width: 700px;
}

/* Page Headers (Internal) */
.page-header {
    padding: 12rem 0 6rem;
    background-color: var(--color-light-grey);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}
.page-header h1 { font-size: 4rem; margin-bottom: 1rem; }
.page-header p { font-size: 1.2rem; max-width: 700px; margin: 0 auto; color: var(--color-charcoal); }

/* Buttons */
.btn {
    display: inline-block; padding: 1rem 2.5rem; font-size: 0.9rem; font-weight: 500;
    text-transform: uppercase; letter-spacing: 1px; border-radius: 0;
    transition: var(--transition-smooth); border: 1px solid transparent;
    cursor: pointer;
}
.btn-primary { background-color: var(--color-crimson); color: var(--color-white); }
.btn-primary:hover { background-color: var(--color-black); color: var(--color-white); }
.btn-outline { background-color: transparent; border-color: var(--color-black); color: var(--color-black); }
.btn-outline:hover { background-color: var(--color-black); color: var(--color-white); }

/* Grids */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }

/* Custom Niche Components - Consulting Focus */
.insight-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 3rem;
    transition: var(--transition-smooth);
    height: 100%;
    display: flex; flex-direction: column;
}
.insight-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-deep); border-color: var(--color-crimson); }
.insight-card h3 { font-size: 1.8rem; margin-bottom: 1rem; }
.insight-card p { flex-grow: 1; font-size: 1rem; }
.insight-link { font-weight: 600; text-transform: uppercase; font-size: 0.85rem; letter-spacing: 1px; margin-top: 2rem; display: inline-block; }

.number-stat { font-family: var(--font-heading); font-size: 4rem; color: var(--color-crimson); line-height: 1; margin-bottom: 0.5rem; }
.stat-label { font-size: 1rem; text-transform: uppercase; letter-spacing: 1px; font-weight: 500; color: var(--color-charcoal); }

.methodology-step { padding-left: 2rem; border-left: 2px solid var(--color-border); position: relative; margin-bottom: 3rem; }
.methodology-step::before {
    content: ''; position: absolute; left: -9px; top: 5px; width: 16px; height: 16px;
    background: var(--color-white); border: 2px solid var(--color-crimson); border-radius: 50%;
}
.methodology-step h3 { font-size: 1.8rem; margin-bottom: 1rem; }

/* Typography Extras */
.text-crimson { color: var(--color-crimson); }
.text-center { text-align: center; }
.subtitle { font-size: 1rem; text-transform: uppercase; letter-spacing: 2px; color: var(--color-crimson); font-weight: 600; display: block; margin-bottom: 1rem; }
.dropcap::first-letter { font-family: var(--font-heading); font-size: 4rem; float: left; line-height: 0.8; margin-right: 0.5rem; color: var(--color-crimson); }

/* Images */
.img-editorial { border-radius: 0; box-shadow: var(--shadow-subtle); width: 100%; object-fit: cover; }
.img-tall { height: 600px; }

/* Footer */
footer { background-color: var(--color-black); padding: 6rem 0 3rem; color: var(--color-white); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 4rem; margin-bottom: 4rem; }
.footer-logo { font-family: var(--font-heading); font-size: 2rem; color: var(--color-white); letter-spacing: 1px; margin-bottom: 1.5rem; display: block; }
.footer-col h4 { color: var(--color-white); font-size: 1.2rem; margin-bottom: 1.5rem; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 0.8rem; }
.footer-links a { color: var(--color-slate); transition: var(--transition-smooth); }
.footer-links a:hover { color: var(--color-white); padding-left: 5px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 2rem; display: flex; justify-content: space-between; color: var(--color-slate); font-size: 0.9rem; }

/* Mobile Responsiveness */
@media (max-width: 1024px) {
    h1 { font-size: 3.5rem; }
    .hero-content h1 { font-size: 4rem; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    section { padding: 4rem 0; }
    .nav-links {
        display: none; flex-direction: column; width: 100%; position: absolute;
        top: 80px; left: 0; background: rgba(255, 255, 255, 0.98); padding: 2rem 0;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05); gap: 1.5rem; text-align: center;
    }
    .nav-links.active { display: flex; }
    .hamburger { display: flex; }
    .hamburger.active div:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .hamburger.active div:nth-child(2) { opacity: 0; }
    .hamburger.active div:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }
    
    .hero { min-height: 80vh; }
    .hero-content h1 { font-size: 3rem; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 2.5rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
    .page-header { padding: 8rem 0 4rem; }
    .page-header h1 { font-size: 2.5rem; }
}