/**
 * Reusable Components & Layout Overrides
 * CT TerraMach Website
 */

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height); /* Spacious, premium header height variables */
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: height var(--transition-normal), background-color var(--transition-normal), box-shadow var(--transition-normal);
    display: flex;
    align-items: center;
}

.site-header.shrunk {
    height: var(--header-height-shrunk);
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-md);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--slate-900);
    letter-spacing: -0.02em;
    text-transform: uppercase; /* Match Arup all-caps corporate logo style */
    display: inline-flex;
    align-items: center;
}

.logo-img {
    height: 48px;
    width: auto;
    display: block;
    transition: height var(--transition-normal);
}

.logo picture {
    display: block;
    line-height: 0;
}

.site-header.shrunk .logo-img {
    height: 38px;
}

.logo-accent {
    color: var(--primary); /* Restore user theme gold color */
    margin-right: 4px;
}

.primary-nav {
    display: flex;
    align-items: center;
    margin-left: auto;
    margin-right: var(--space-2xl); /* Air space between links and button */
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-xl); /* Generous spacing */
}

.nav-link {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--slate-900); /* Highly vivid, black text */
    letter-spacing: -0.01em;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary); /* Restore user theme hover gold color */
}

/* ==========================================================================
   Navigation Dropdown Menu
   ========================================================================== */
.has-dropdown {
    position: relative;
}

.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.arrow-icon {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-left: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: translateY(-2px) rotate(-45deg);
    transition: transform var(--transition-normal);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(12px);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(21, 37, 56, 0.08);
    border-top: 3px solid var(--color-accent);
    border-radius: var(--radius-lg, 8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.02);
    padding: var(--space-md, 16px);
    min-width: 280px;
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s ease;
    z-index: 1001;
}

/* Invisible bridge to prevent losing hover state when moving mouse to menu */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -16px;
    left: 0;
    width: 100%;
    height: 16px;
}

/* Hover & Focus state for Desktop Dropdown */
@media (min-width: 769px) {
    .has-dropdown:hover .dropdown-menu,
    .has-dropdown:focus-within .dropdown-menu {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateX(-50%) translateY(6px);
    }

    .has-dropdown:hover .arrow-icon {
        transform: translateY(1px) rotate(135deg);
    }
}

.dropdown-item {
    display: block;
    padding: var(--space-sm, 10px) var(--space-md, 14px);
    text-decoration: none;
    border-radius: var(--radius-md, 6px);
    transition: background-color 0.25s ease;
    text-align: left;
}

.dropdown-item-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 2px;
    transition: color 0.2s ease;
}

.dropdown-item-arrow {
    opacity: 0;
    transform: translateX(-4px);
    transition: all 0.2s ease;
    color: var(--color-accent);
}

.dropdown-item-desc {
    display: block;
    font-family: var(--font-body);
    font-size: 0.78rem;
    color: var(--color-text-muted);
    font-weight: 500;
    line-height: 1.3;
    transition: color 0.2s ease;
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: rgba(21, 37, 56, 0.03);
}

.dropdown-item:hover .dropdown-item-title,
.dropdown-item:focus .dropdown-item-title {
    color: var(--color-primary);
}

.dropdown-item:hover .dropdown-item-arrow,
.dropdown-item:focus .dropdown-item-arrow {
    opacity: 1;
    transform: translateX(0);
}

.dropdown-item:hover .dropdown-item-desc,
.dropdown-item:focus .dropdown-item-desc {
    color: var(--color-primary-dark);
}

.header-cta {
    display: block;
}

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

.hamburger-bar {
    display: block;
    width: 22px;
    height: 2px;
    margin: 5px auto;
    background-color: var(--text-title);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    padding: var(--space-sm) var(--space-xl);
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
    gap: var(--space-xs);
}

.btn-primary, .button-primary {
    background-color: var(--button-primary-bg);
    color: var(--button-primary-text);
    border: 2px solid var(--button-primary-bg);
}

.btn-primary:hover, .button-primary:hover {
    background-color: var(--button-primary-hover);
    border-color: var(--button-primary-hover);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(19, 34, 46, 0.15);
}

.btn-outline, .btn-secondary, .button-secondary {
    background-color: var(--button-secondary-bg);
    color: var(--button-secondary-text);
    border: 2px solid var(--button-secondary-border);
}

.btn-outline:hover, .btn-secondary:hover, .button-secondary:hover {
    background-color: var(--button-secondary-hover-bg);
    border-color: var(--color-primary);
    color: var(--button-secondary-text);
}

.btn-accent, .button-accent {
    background-color: var(--color-accent);
    color: var(--color-charcoal);
    border: 2px solid var(--color-accent);
}

.btn-accent:hover, .button-accent:hover {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    color: var(--color-white);
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.8rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-spinner {
    animation: rotate 2s linear infinite;
    width: 20px;
    height: 20px;
}

.btn-spinner .path {
    stroke: var(--slate-950);
    stroke-linecap: round;
    animation: dash 1.5s ease-in-out infinite;
}

@keyframes rotate {
    100% { transform: rotate(360deg); }
}
@keyframes dash {
    0% { stroke-dasharray: 1, 150; stroke-dashoffset: 0; }
    50% { stroke-dasharray: 90, 150; stroke-dashoffset: -35; }
    100% { stroke-dasharray: 90, 150; stroke-dashoffset: -124; }
}

/* ==========================================================================
   Service Cards
   ========================================================================== */
.card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(19, 34, 46, 0.08);
}

.service-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: 0 8px 24px rgba(19, 34, 46, 0.08);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 12px 32px rgba(19, 34, 46, 0.12);
}

.service-card-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background-color: rgba(245, 158, 11, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.service-card-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.service-card-title {
    margin-bottom: var(--space-md);
}

.service-card-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--space-xl);
}

.service-card-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-column: column;
    gap: var(--space-sm);
}

.service-card-features li {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.85rem;
    color: var(--text-main);
}

.check-icon {
    width: 16px;
    height: 16px;
    color: var(--secondary);
    flex-shrink: 0;
}

/* ==========================================================================
   Project Cards
   ========================================================================== */
.project-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(19, 34, 46, 0.08);
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: 0 12px 32px rgba(19, 34, 46, 0.12);
}

.project-card-image-wrapper {
    position: relative;
    padding-top: 60%; /* Aspect Ratio 3:2 */
    overflow: hidden;
    background-color: var(--slate-100);
}

.project-card-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-card-image {
    transform: scale(1.05);
}

.project-card-category-badge {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    border: 1px solid var(--border-color);
    color: var(--slate-800);
    padding: var(--space-2xs) var(--space-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.project-card-content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.project-card-client {
    font-weight: 600;
}

.project-card-title {
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
}

.project-card-description {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

.project-card-stats-ribbon {
    background-color: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
    margin-bottom: var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 2px solid var(--primary);
    font-size: 0.85rem;
}

.project-card-metric-label {
    color: var(--text-muted);
    font-weight: 500;
}

.project-card-metric-value {
    color: var(--text-title);
    font-weight: 700;
}

.project-card-scope {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-top: auto;
}

.project-card-scope-tag {
    font-size: 0.7rem;
    background-color: var(--slate-100);
    color: var(--slate-600);
    padding: 2px var(--space-xs);
    border-radius: var(--radius-sm);
}

/* ==========================================================================
   Form Styling
   ========================================================================== */
.form-container-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl);
    box-shadow: var(--shadow-lg);
}

.form-card-title {
    margin-bottom: var(--space-xl);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--space-md);
}

.form-group {
    margin-bottom: var(--space-xl);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-heading); /* Label text: #13222E */
    margin-bottom: var(--space-xs);
}

.form-control,
input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
    width: 100%;
    background-color: var(--color-white); /* Input background: #FFFFFF */
    border: 1px solid var(--color-border); /* Input border: #D9D9D8 */
    color: var(--color-text); /* Input text: #26292A */
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control::placeholder,
input::placeholder,
textarea::placeholder {
    color: var(--color-text-muted); /* Placeholder text: #5C6C7C */
}

.form-control:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary); /* Input focus border: #2B4B69 */
    box-shadow: 0 0 0 3px rgba(43, 75, 105, 0.18); /* Input focus ring: rgba(43, 75, 105, 0.18) */
}

textarea {
    resize: vertical;
}

.form-response-alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-xl);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-response-alert.success {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--secondary);
}

.form-response-alert.error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #EF4444;
}

/* ==========================================================================
   Footer Component
   ========================================================================== */
.site-footer {
    background: radial-gradient(circle at 50% 100%, #162435 0%, #0A1118 80%); /* Premium radial upward glow */
    padding-top: var(--space-3xl);
    padding-bottom: var(--space-2xl);
    color: #9EADB9; /* secondary light grey-blue */
    position: relative;
    overflow: hidden;
}

/* Subtle blueprint grid overlay for a high-tech engineering background */
.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(rgba(201, 178, 140, 0.012) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(201, 178, 140, 0.012) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 1;
}

.footer-top-accent {
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-primary) 100%);
    height: 4px;
    width: 100%;
    position: relative;
    z-index: 2;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr; /* 4 Columns */
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
    position: relative;
    z-index: 2;
}

.footer-logo {
    display: inline-block;
    margin-bottom: var(--space-md);
}

.footer-logo-img {
    height: 48px;
    width: auto;
    display: block;
    opacity: 0.95;
    transition: opacity var(--transition-fast) ease;
}

.footer-logo-img:hover {
    opacity: 1;
}

.footer-tagline {
    font-size: 0.9rem;
    line-height: 1.5;
    max-width: 280px;
    margin-bottom: var(--space-lg);
    color: #9EADB9;
}

.footer-hubs-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--space-lg);
}

.hub-pill {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-accent);
    border: 1px solid rgba(201, 178, 140, 0.15);
    border-radius: var(--radius-sm);
    letter-spacing: 0.02em;
}

.footer-social-links {
    display: flex;
    gap: var(--space-sm);
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.03);
    transition: all var(--transition-fast) ease;
}

.social-icon:hover {
    color: var(--color-primary-dark);
    border-color: var(--color-accent);
    background-color: var(--color-accent);
    transform: translateY(-2px) rotate(360deg);
}

.social-icon svg {
    display: block;
}

.footer-title {
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-xl);
    position: relative;
    padding-bottom: var(--space-xs);
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 20px;
    height: 2px;
    background-color: var(--color-accent);
}

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

.footer-links a {
    color: #9EADB9;
    font-size: 0.88rem;
    text-decoration: none;
    transition: color var(--transition-fast) ease, padding-left var(--transition-fast) ease;
}

.footer-links a:hover {
    color: var(--color-accent);
    padding-left: 6px;
}

.footer-hubs-section {
    color: #9EADB9;
}

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

.footer-hubs-list li {
    display: flex;
    flex-direction: column;
}

.footer-hubs-list .hub-name {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2px;
}

.footer-hubs-list .hub-email {
    font-size: 0.88rem;
    color: #9EADB9;
    text-decoration: none;
    transition: color var(--transition-fast) ease;
}

.footer-hubs-list .hub-email:hover {
    color: var(--color-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: var(--space-lg);
    position: relative;
    z-index: 2;
}

.footer-bottom-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    width: 100%;
}

.copyright {
    font-size: 0.8rem;
    color: #7A8B99;
    margin: 0;
}

.footer-safety-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #10B981;
    background: rgba(16, 185, 129, 0.06);
    border: 1px solid rgba(16, 185, 129, 0.15);
    padding: 4px 12px;
    border-radius: 4px;
}

.safety-dot {
    width: 6px;
    height: 6px;
    background-color: #10B981;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 6px #10B981;
}

/* Responsive Footer rules */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xl);
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-bottom-flex {
        flex-direction: column;
        align-items: flex-start;
    }
}


/* ==========================================================================
   Section Background Rules & Color Schemes
   ========================================================================== */
.section-light {
    background-color: var(--color-background);
    color: var(--color-text);
}
.section-light .section-title {
    color: var(--color-heading);
}

.section-navy {
    background-color: var(--color-primary);
    color: var(--color-white);
}
.section-navy .section-title,
.section-navy h1, .section-navy h2, .section-navy h3, .section-navy h4 {
    color: var(--color-white);
}
.section-navy .section-subtitle, .section-navy p {
    color: rgba(255, 255, 255, 0.9);
}

.section-deep-navy {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
}
.section-deep-navy .section-title,
.section-deep-navy h1, .section-deep-navy h2, .section-deep-navy h3, .section-deep-navy h4 {
    color: var(--color-white);
}
.section-deep-navy .section-subtitle, .section-deep-navy p {
    color: var(--color-grey);
}

.section-gold-highlight {
    background-color: var(--color-accent-light);
    color: var(--color-text);
}
.section-gold-highlight .section-title,
.section-gold-highlight h1, .section-gold-highlight h2, .section-gold-highlight h3, .section-gold-highlight h4 {
    color: var(--color-heading);
}