:root {
    /* Palette */
    --navy: #21343A;
    --blue-deep: #2E474E;
    --slate: #526368;
    --graphite: #687679;
    --sage: #A8B8B0;
    --mint: #D4E1DB;
    --mist: #E2E8E5;
    --fog: #E9ECE8;
    --concrete: #DDD8CF;
    --ivory: #F5F3EC;
    --white: #FBFAF7;
    --teal: #5E8988;
    --blue-steel: #718F9A;
    --green: #7C9587;
    --amber: #C49358;
    --copper: #B8775C;
    
    /* Text */
    --ink: #19272B;
    --body: #405054;
    --muted: #6C787A;
    --light: #F2F4F0;

    /* Spacing */
    --space-4: 4px;
    --space-8: 8px;
    --space-12: 12px;
    --space-16: 16px;
    --space-24: 24px;
    --space-40: 40px;
    --space-64: 64px;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--ivory);
    color: var(--body);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

/* Accessibility & Resets */
a {
    color: var(--teal);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--blue-deep);
}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 4px;
}

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

h1, h2, h3, h4 {
    color: var(--ink);
    line-height: 1.2;
    overflow-wrap: anywhere;
}

h1 { font-size: 2.5rem; margin-bottom: var(--space-24); }
h2 { font-size: 2rem; margin-bottom: var(--space-16); margin-top: var(--space-40); }
h3 { font-size: 1.5rem; margin-bottom: var(--space-12); }

p {
    margin-bottom: var(--space-16);
}

ul, ol {
    margin-bottom: var(--space-24);
    padding-left: var(--space-24);
}

li {
    margin-bottom: var(--space-8);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-24);
    min-width: 0;
}

/* Header */
.site-header {
    background-color: var(--white);
    height: 52px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--mist);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    font-weight: 700;
    color: var(--navy);
    font-size: 1.1rem;
}

.brand svg {
    width: 24px;
    height: 24px;
    fill: var(--amber);
}

.nav-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-8);
}

.nav-toggle-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--navy);
    position: relative;
}
.nav-toggle-icon::before, .nav-toggle-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--navy);
    left: 0;
}
.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { bottom: -6px; }

.main-nav {
    display: none;
    position: absolute;
    top: 52px;
    left: 0;
    width: 100%;
    background-color: var(--white);
    padding: var(--space-24);
    box-shadow: 0 10px 20px rgba(33,52,58,0.1);
    z-index: 50;
}

.main-nav.is-visible {
    display: block;
}

.nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.nav-list a {
    color: var(--navy);
    font-weight: 500;
    display: block;
}

.btn {
    display: inline-block;
    background-color: var(--teal);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
}

.btn:hover {
    background-color: var(--blue-deep);
    color: var(--white);
}

.header-cta {
    display: none;
}

/* Hero Section */
.hero {
    padding: var(--space-64) 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-24);
}

.hero-text {
    background-color: var(--white);
    padding: var(--space-40);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(33,52,58,0.04);
}

.hero-visual {
    background-color: var(--navy);
    border-radius: 16px;
    padding: var(--space-40);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    overflow: hidden;
}

.process-flow {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-16);
    justify-content: center;
    font-weight: 600;
    color: var(--mint);
    font-size: 0.9rem;
}

.process-step {
    display: flex;
    align-items: center;
    gap: var(--space-16);
}

.process-step:not(:last-child)::after {
    content: '→';
    color: var(--amber);
}

/* Strict Image & Text Separation Card Style (Horizontal Split) */
.card-section {
    padding: var(--space-64) 0;
}

.card-horizontal {
    display: flex;
    flex-direction: column;
    gap: var(--space-24); /* Mandatory mobile gap */
    margin-bottom: var(--space-64);
}

.card-media {
    border-radius: 16px;
    overflow: hidden;
    background-color: var(--mist);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 16/9;
}

.card-media svg {
    width: 100%;
    height: auto;
}

.card-content {
    background-color: var(--white);
    border-radius: 16px;
    padding: var(--space-40);
    box-shadow: 0 4px 20px rgba(33, 52, 58, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-meta {
    font-size: 0.85rem;
    color: var(--slate);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-12);
    font-weight: 600;
}

.card-tags {
    display: flex;
    gap: var(--space-8);
    margin-bottom: var(--space-24);
    flex-wrap: wrap;
}

.tag {
    background-color: var(--fog);
    color: var(--navy);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Info Blocks */
.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-24);
    margin-top: var(--space-40);
}

.info-block {
    background-color: var(--white);
    padding: var(--space-24);
    border-radius: 12px;
    border-top: 4px solid var(--teal);
    box-shadow: 0 2px 10px rgba(33,52,58,0.03);
}

.info-block h4 {
    color: var(--teal);
    margin-bottom: var(--space-8);
}

/* Forms */
.form-group {
    margin-bottom: var(--space-24);
}

.form-label {
    display: block;
    margin-bottom: var(--space-8);
    font-weight: 500;
    color: var(--navy);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--sage);
    border-radius: 8px;
    font-family: inherit;
    background-color: var(--white);
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(94, 137, 136, 0.2);
}

.form-control.is-invalid {
    border-color: var(--amber);
}

.error-msg {
    display: none;
    color: var(--amber);
    font-size: 0.85rem;
    margin-top: var(--space-4);
}
.form-control.is-invalid + .error-msg {
    display: block;
}

/* Tables for Content Pages */
.table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--space-24);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(33,52,58,0.05);
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--white);
}

th, td {
    padding: var(--space-12) var(--space-16);
    text-align: left;
    border-bottom: 1px solid var(--mist);
}

th {
    background-color: var(--navy);
    color: var(--white);
    font-weight: 500;
}

/* Content Page Layout */
.page-header {
    padding: var(--space-64) 0;
    background-color: var(--mist);
    margin-bottom: var(--space-40);
}

.content-body {
    background-color: var(--white);
    padding: var(--space-40);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(33, 52, 58, 0.03);
    margin-bottom: var(--space-64);
}

/* Diagram blocks */
.tech-diagram {
    background-color: var(--navy);
    padding: var(--space-24);
    border-radius: 12px;
    margin: var(--space-40) 0;
    color: var(--white);
}

/* Footer */
.site-footer {
    background-color: var(--navy);
    color: var(--light);
    padding: var(--space-64) 0 var(--space-40);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-40);
    margin-bottom: var(--space-40);
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: var(--space-16);
    font-size: 1.1rem;
}

.footer-col ul {
    list-style: none;
    padding: 0;
}

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

.footer-bottom {
    border-top: 1px solid var(--slate);
    padding-top: var(--space-24);
    font-size: 0.85rem;
    color: var(--muted);
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(251, 250, 247, 0.95);
    backdrop-filter: blur(8px);
    border-top: 1px solid var(--mist);
    padding: var(--space-16);
    box-shadow: 0 -4px 20px rgba(33,52,58,0.1);
    z-index: 100;
    display: none; /* Controlled via JS */
}

.cookie-banner.is-visible {
    display: block;
}

.cookie-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.cookie-text p {
    margin: 0;
    font-size: 0.9rem;
}

.cookie-actions {
    display: flex;
    gap: var(--space-8);
    flex-wrap: wrap;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--slate);
    color: var(--navy);
}
.btn-outline:hover {
    background: var(--slate);
    color: var(--white);
}

/* Media Queries */
@media (min-width: 768px) {
    .site-header {
        height: 64px;
    }
    
    .nav-toggle {
        display: none;
    }

    .main-nav {
        display: block;
        position: static;
        background: none;
        padding: 0;
        box-shadow: none;
        width: auto;
    }

    .nav-list {
        flex-direction: row;
        gap: var(--space-24);
    }

    .header-cta {
        display: block;
    }

    .hero {
        flex-direction: row;
        gap: var(--space-40); /* Physical separation rule applied to hero */
    }

    .hero-text {
        flex: 1;
    }

    .hero-visual {
        flex: 1;
    }

    /* Horizontal Split Card Implementation */
    .card-horizontal {
        flex-direction: row;
        align-items: stretch;
        gap: var(--space-40); /* Mandatory desktop gap */
    }

    .card-media {
        flex: 0 0 40%;
    }

    .card-content {
        flex: 1;
    }

    .info-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }

    .cookie-inner {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

@media (min-width: 1024px) {
    .info-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}