/* CSS Variables / Design System */
:root {
    /* Colors */
    --color-bg: #FCFCFC; /* Ivory/White */
    --color-bg-light: #FFFFFF;
    --color-bg-dark: #121212; /* Soft black for dark sections */
    --color-bg-accent: #F4F4F4; /* Very light warm gray */
    
    --color-text-main: #1C1C1E; /* Soft black */
    --color-text-muted: #5A5A5C; /* Graphite gray */
    --color-text-light: #F2F2F2; /* For dark backgrounds */
    
    --color-accent: #B89C6D; /* Subtle old gold */
    --color-accent-hover: #A08558;
    
    --color-border: #E8E8E8;
    --color-border-dark: #333333;

    /* Typography */
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    
    /* Transitions */
    --transition: 0.3s ease-in-out;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-text-main);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

.section-dark p {
    color: #A0A0A0;
}

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

ul {
    list-style: none;
}

/* Layout Classes */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

section {
    padding: var(--space-xl) 0;
}

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

.section-dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
}

.section-dark h2, .section-dark h3 {
    color: var(--color-text-light);
}

.section-accent {
    background-color: var(--color-bg-accent);
}

.border-top {
    border-top: 1px solid var(--color-border);
}

.text-center {
    text-align: center;
}

.centered {
    margin-left: auto;
    margin-right: auto;
}

.section-header {
    margin-bottom: var(--space-lg);
    max-width: 800px;
}

.section-desc {
    font-size: 1.25rem;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-outline {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 2px;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background-color: var(--color-text-main);
    color: var(--color-bg-light);
    border: 1px solid var(--color-text-main);
}

.btn-primary:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg-light);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-main);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-text-main);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--color-border);
    padding: 0.6rem 1.2rem;
}

.btn-outline:hover {
    border-color: var(--color-text-main);
}

.w-100 {
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    background-color: rgba(252, 252, 252, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
    background-color: rgba(255, 255, 255, 0.98);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a:not(.btn-outline) {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--color-text-muted);
}

.nav-links a:not(.btn-outline):hover {
    color: var(--color-text-main);
}

/* Mobile Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-text-main);
    transition: var(--transition);
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg-light);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.mobile-menu.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-menu a {
    font-family: var(--font-heading);
    font-size: 2rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px; /* Offset for navbar */
}

.hero-content {
    max-width: 900px;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: 100px;
    margin-bottom: 2rem;
}

.badge-name {
    color: var(--color-text-main);
    font-weight: 600;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--color-text-main);
    margin-bottom: 2rem;
    font-weight: 300;
}

.hero-text {
    max-width: 700px;
    margin-bottom: 3rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Grids & Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 4rem;
}

.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

.split-layout.reverse {
    grid-template-columns: 1.2fr 0.8fr;
}

/* Specific Section Styles */
.card {
    padding: 2rem;
    border: 1px solid transparent;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    border-radius: 4px;
}

.card:hover {
    transform: scale(1.03);
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(0,0,0,0.04);
}

.card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.card-line {
    width: 40px;
    height: 1px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.card:hover .card-line {
    width: 80px;
}

/* Split List */
.split-list ul li {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    padding: 1.5rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    color: var(--color-text-light);
}

.split-list ul li:last-child {
    border-bottom: none;
}

.split-list ul li::before {
    content: '—';
    color: var(--color-accent);
    margin-right: 1rem;
}

/* Logos Grid */
.logos-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

.ref-item {
    padding: 1rem 2rem;
    border: 1px solid var(--color-border);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 4px;
    transition: all 0.3s ease;
    cursor: default;
    background-color: transparent;
}

.ref-item:hover {
    background-color: var(--color-accent);
    color: var(--color-bg-light);
    border-color: var(--color-accent);
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 20px rgba(184, 156, 109, 0.2);
}

/* Quote Section */
.quote-section {
    padding: var(--space-xl) 0;
    background-color: var(--color-bg);
}

blockquote {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    line-height: 1.4;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    color: var(--color-text-main);
}

/* Timeline / Methodology */
.timeline {
    margin-top: 3rem;
    border-left: 1px solid var(--color-border);
    padding-left: 2rem;
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.step-num {
    position: absolute;
    left: -2rem;
    top: 0;
    transform: translateX(-50%);
    background-color: var(--color-bg-accent);
    padding: 0.5rem 0;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--color-accent);
    font-weight: 600;
}

.step-content h3 {
    margin-bottom: 0.5rem;
}

.differential-value {
    margin-top: 4rem;
    padding: 2rem;
    background-color: var(--color-bg-light);
    border-left: 4px solid var(--color-accent);
}

.differential-value p {
    margin: 0;
    color: var(--color-text-main);
    font-size: 1.25rem;
}

/* Services */
.service-card {
    padding: 2rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    border-radius: 4px;
}

.service-card:hover {
    transform: scale(1.03) translateY(-5px);
    box-shadow: 0 15px 35px rgba(184, 156, 109, 0.1);
    border-color: var(--color-accent);
}

.service-card h3 {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.service-card ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
    color: var(--color-text-muted);
}

.service-card ul li::before {
    content: '•';
    color: var(--color-accent);
    position: absolute;
    left: 0;
    top: 0;
}

/* Form */
.form-container {
    background-color: rgba(255,255,255,0.03);
    padding: 3rem;
    border: 1px solid rgba(255,255,255,0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #A0A0A0;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 1rem;
    background-color: transparent;
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--color-text-light);
    font-family: var(--font-body);
    transition: var(--transition);
}

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

/* Footer */
footer {
    background-color: var(--color-bg-light);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 3rem;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.footer-text {
    max-width: 500px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.85rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

/* Utilities */
.placeholder-image {
    background-color: #E8E8E8;
    background-image: url('assets/about_bg.png');
    background-size: cover;
    background-position: center;
    height: 100%;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

/* Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .split-layout, .split-layout.reverse {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .hero {
        padding-top: 120px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    .section-header {
        margin-bottom: 2rem;
    }
    
    .timeline {
        padding-left: 1.5rem;
    }
    
    .step-num {
        left: -1.5rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}