:root {
    --bg-color: #e6d6c2;
    --card-color: #efe4d5;
    --text-color: #4a2c18;
    --accent-color: #b07a4f;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Quicksand', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, .logo {
    font-family: 'Playfair Display', serif;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(230, 214, 194, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(74, 44, 24, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-color);
    font-style: italic;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
}

.nav-links a.active, .nav-links a:hover {
    color: var(--accent-color);
}

/* Hero */
.hero {
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(230, 214, 194, 0.8), rgba(230, 214, 194, 0.8)), 
                url('https://images.unsplash.com/photo-1495474472287-4d71bcdd2085?auto=format&fit=crop&w=1950&q=80');
    background-size: cover;
    background-position: center;
    padding-top: 60px;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    opacity: 0.8;
}

.italic-accent {
    color: var(--accent-color);
    font-style: italic;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--text-color);
    color: var(--card-color);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.btn.secondary {
    background-color: var(--card-color);
    color: var(--text-color);
}

/* Cards */
.card {
    background-color: var(--card-color);
    border-radius: 2rem;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.grid-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: -50px;
}

.link-card {
    position: relative;
    height: 350px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    text-decoration: none;
    color: var(--text-color);
    padding: 0;
}

.card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0.3;
    transition: transform 0.7s ease;
}

.link-card:hover .card-bg {
    transform: scale(1.1);
}

.card-content {
    position: relative;
    padding: 2.5rem;
    z-index: 1;
}

/* Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Page Specific */
.page-header {
    text-align: center;
    padding-top: 150px;
    padding-bottom: 3rem;
}

.page-header h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
}

/* Method Map */
.method-map-container {
    background-color: var(--card-color);
    border-radius: 3rem;
    padding: 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.method-map {
    height: 300px;
    position: relative;
    max-width: 600px;
    margin: 2rem auto;
}

.map-bubble {
    position: absolute;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: none;
    background-color: var(--accent-color);
    color: var(--white);
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.map-bubble:hover {
    transform: scale(1.1);
    background-color: var(--text-color);
}

.map-bubble.v60 { top: 0; left: 10%; }
.map-bubble.chemex { top: 20%; right: 10%; background-color: var(--text-color); }
.map-bubble.aero { bottom: 10%; left: 30%; width: 80px; height: 80px; }
.map-bubble.press { bottom: 0; right: 20%; width: 90px; height: 90px; }

/* Simulator */
.simulator-card {
    background-color: var(--card-color);
    border-radius: 2rem;
    padding: 3rem;
    margin: 3rem 0;
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.05);
}

.simulator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.slider-group {
    margin-bottom: 2rem;
}

.slider-group label {
    display: block;
    margin-bottom: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.8rem;
}

input[type=range] {
    width: 100%;
    accent-color: var(--text-color);
    cursor: pointer;
}

.result-display {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 1.5rem;
    text-align: center;
}

.yield-number {
    font-size: 4rem;
    font-family: 'Playfair Display', serif;
    color: var(--accent-color);
    font-weight: 800;
    line-height: 1;
}

.strength-tag {
    margin-top: 1rem;
    font-style: italic;
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Accordion */
.accordion-item {
    background-color: var(--card-color);
    border-radius: 1.5rem;
    margin-bottom: 1rem;
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.05);
}

.accordion-header {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

.accordion-header:hover {
    background-color: rgba(0,0,0,0.02);
}

.sub-label {
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--accent-color);
    letter-spacing: 2px;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    padding: 0 2rem;
}

.accordion-item.active .accordion-content {
    max-height: 200px;
    padding-bottom: 1.5rem;
}

.accordion-item.active .arrow {
    transform: rotate(180deg);
}

/* Equipment */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

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

.equip-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cta-banner {
    background-color: var(--accent-color);
    color: var(--white);
    padding: 3rem;
    border-radius: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 4rem 0;
}

/* Footer */
.footer {
    background-color: var(--text-color);
    color: var(--card-color);
    padding: 5rem 2rem;
    text-align: center;
}

.footer h2 {
    font-style: italic;
    margin-bottom: 1rem;
}

.footer-links {
    margin: 2rem 0;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-links a {
    color: inherit;
    text-decoration: none;
    font-size: 0.9rem;
}

.copyright {
    opacity: 0.5;
    font-size: 0.8rem;
}

@media (max-width: 768px) {
    .simulator-grid { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 2.5rem; }
    .cta-banner { flex-direction: column; text-align: center; gap: 2rem; }
    .nav-links { display: none; }
}