:root {
    --navy: #1E293B;
    --grey: #64748B;
    --white: #FFFFFF;
    --border: #F1F5F9;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--white);
    color: var(--navy);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 40px; }

/* Navigation */
nav { padding: 20px 0; background: var(--white); border-bottom: 1px solid var(--border); }
nav .container { display: flex; justify-content: space-between; align-items: center; }

/* Constrained Logo Header Styling */
.logo { display: flex; align-items: center; }
.logo img { height: 80px !important; max-height: 80px !important; width: auto !important; max-width: 320px !important; object-fit: contain; display: block; }

nav ul { display: flex; list-style: none; gap: 32px; align-items: center; }
nav ul li a { text-decoration: none; color: var(--navy); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1px; }
.btn-nav { border: 1.5px solid var(--navy); padding: 8px 18px; text-decoration: none; transition: 0.3s; }
.btn-nav:hover { background: var(--navy); color: white !important; }

/* Hero */
.hero { padding: 100px 0 120px; }
.tagline { color: var(--grey); text-transform: uppercase; font-weight: 600; letter-spacing: 5px; font-size: 0.75rem; margin-bottom: 24px; }
.hero h1 { font-size: 4rem; font-weight: 700; letter-spacing: -2px; line-height: 1.05; margin-bottom: 30px; }
.hero-subtext { font-size: 1.25rem; color: var(--grey); max-width: 700px; margin-bottom: 45px; font-weight: 300; }

.btn-primary { 
    background: var(--navy); 
    color: white; 
    padding: 18px 36px; 
    text-decoration: none; 
    font-weight: 600; 
    font-size: 0.85rem; 
    border: 1px solid var(--navy);
    cursor: pointer;
    display: inline-block;
    transition: 0.3s;
}
.btn-primary:hover { background: transparent; color: var(--navy); }

/* Sections */
.section-label { font-weight: 700; font-size: 0.7rem; color: var(--grey); text-transform: uppercase; margin-bottom: 40px; letter-spacing: 2px; }
.services { padding: 90px 0; border-top: 1px solid var(--border); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 50px; }
.card h3 { font-size: 1.25rem; margin-bottom: 16px; font-weight: 700; }
.card p { color: var(--grey); font-size: 0.95rem; font-weight: 300; }

.approach { padding: 100px 0; background: #F8FAFC; }
.approach-content { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.approach-item h4 { font-size: 1.05rem; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 1px; }
.approach-item p { font-size: 0.95rem; color: var(--grey); }

/* FAQ Section & Collapsible Master Wrapper */
.faq { padding: 90px 0; border-top: 1px solid var(--border); }
.faq-master-wrapper { border: 1px solid var(--border); border-radius: 8px; background: #F8FAFC; overflow: hidden; transition: all 0.3s ease; }
.faq-master-wrapper[open] { background: #FFFFFF; }

.faq-master-header {
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 30px;
    cursor: pointer;
    background: #F8FAFC;
    border-bottom: 1px solid transparent;
}
.faq-master-header::-webkit-details-marker { display: none; }
.faq-master-header:hover { background: #F1F5F9; }
.faq-master-wrapper[open] .faq-master-header { border-bottom-color: var(--border); }

.faq-master-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: -1px;
    margin: 0;
}

.faq-toggle-btn {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--navy);
    border: 1.5px solid var(--navy);
    padding: 8px 16px;
    border-radius: 4px;
}

.faq-master-wrapper[open] .faq-toggle-btn::after { content: ' (Collapse)'; }
.faq-master-wrapper:not([open]) .faq-toggle-btn::after { content: ' (Expand)'; }

/* Nested FAQ Accordion */
.accordion { max-width: 900px; margin: 0 auto; padding: 15px 30px 30px; }
.accordion details { border-bottom: 1px solid var(--border); padding: 18px 0; }
.accordion summary { list-style: none; display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 1.05rem; cursor: pointer; color: var(--navy); outline: none; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { content: '+'; font-size: 1.4rem; color: var(--grey); font-weight: 300; transition: 0.3s; }
.accordion details[open] summary { margin-bottom: 12px; }
.accordion details[open] summary::after { content: '−'; transform: rotate(180deg); }
.content { color: var(--grey); font-size: 0.95rem; font-weight: 300; max-width: 800px; animation: slideDown 0.4s ease; }

@keyframes slideDown { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: translateY(0); } }

/* Contact Card */
.contact { padding: 120px 0; }
.contact-card { background: var(--navy); color: white; padding: 80px 60px; text-align: center; border-radius: 8px; }
.contact-card h2 { font-size: 3rem; letter-spacing: -1.5px; margin-bottom: 16px; font-weight: 700; }
.contact-card p { color: var(--grey); margin-bottom: 35px; }

#contact-form { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.form-row { display: flex; gap: 16px; }
#contact-form input, #contact-form select, #contact-form textarea { width: 100%; padding: 16px; background: transparent; border: 1px solid rgba(255, 255, 255, 0.15); color: white; font-family: 'Inter', sans-serif; font-size: 0.95rem; border-radius: 4px; }
#contact-form select { background-color: var(--navy); color: var(--grey); }

/* Success Box */
.success-box { animation: fadeIn 0.6s ease; }
.success-icon { font-size: 3.5rem; margin-bottom: 16px; color: #64748B; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Footer */
.masked-email a { color: var(--grey); text-decoration: none; transition: 0.3s; }
.masked-email a:hover { color: var(--white); }
footer { padding: 50px 0; border-top: 1px solid var(--border); font-size: 0.7rem; font-weight: 700; color: var(--grey); text-transform: uppercase; letter-spacing: 2px; }
.footer-flex { display: flex; justify-content: space-between; align-items: center; }

@media (max-width: 900px) {
    .hero h1 { font-size: 2.75rem; }
    .grid, .approach-content, .form-row { grid-template-columns: 1fr; flex-direction: column; }
    .contact-card { padding: 50px 20px; }
    .footer-flex { flex-direction: column; gap: 12px; text-align: center; }
    .faq-master-header { flex-direction: column; align-items: flex-start; gap: 12px; }
    nav .container { flex-direction: column; gap: 20px; }
}