/* filename: css/style.css */
:root {
    --color-primary: #0a4f4f;
    --color-primary-dark: #063838;
    --color-accent: #3abfb4;
    --color-text: #1f2937;
    --color-text-muted: #5b6573;
    --color-bg: #ffffff;
    --color-bg-muted: #f4f7f7;
    --color-border: #d7dede;
    --color-error: #b91c1c;
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --max-width: 1200px;
    --radius: 6px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-bg);
}

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

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

a:hover, a:focus {
    text-decoration: underline;
}

.container {
    width: min(92%, var(--max-width));
    margin-inline: auto;
}

/* Header */
.site-header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -0.03em;
}

.tag-trademark {
    font-size: 0.75rem;
    vertical-align: super;
    font-weight: 400;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    gap: 1.75rem;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-menu a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
}

.nav-menu a:hover,
.nav-menu a[aria-current="page"] {
    color: var(--color-primary);
}

.cta-link {
    background-color: var(--color-primary);
    color: var(--color-bg) !important;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius);
    font-weight: 600;
}

.cta-link:hover {
    background-color: var(--color-primary-dark);
    text-decoration: none;
}

.nav-toggle {
    display: none;
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0d6363 100%);
    color: #fff;
    padding: 5rem 0 4rem;
}

.hero h1 {
    font-size: clamp(2.25rem, 5vw, 3.75rem);
    line-height: 1.15;
    margin: 0 0 1.25rem;
    letter-spacing: -0.04em;
}

.hero .subhead {
    font-size: clamp(1.1rem, 2.5vw, 1.65rem);
    font-weight: 400;
    opacity: 0.95;
    display: block;
    margin-top: 0.75rem;
}

.lead {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 720px;
    margin: 0 0 1.5rem;
}

.hero .lead {
    color: rgba(255, 255, 255, 0.88);
    max-width: 680px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.85rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    text-align: center;
    border: 2px solid transparent;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #022;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background-color: #2ca89e;
    border-color: #2ca89e;
    text-decoration: none;
}

.btn-secondary {
    background-color: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.6);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    text-decoration: none;
}

.section .btn-secondary {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.section .btn-secondary:hover {
    background-color: rgba(10, 79, 79, 0.06);
}

/* Value bar */
.value-bar {
    background-color: var(--color-bg-muted);
    padding: 2rem 0;
    border-bottom: 1px solid var(--color-border);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
}

.value-bar article {
    text-align: center;
}

.value-bar strong {
    display: block;
    font-size: 1.75rem;
    color: var(--color-primary);
}

.value-bar span {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* Sections */
.section {
    padding: 4rem 0;
}

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

.section h2 {
    font-size: 1.9rem;
    margin: 0 0 1.25rem;
    color: var(--color-primary-dark);
}

.section h3 {
    font-size: 1.2rem;
    margin: 0 0 0.75rem;
    color: var(--color-primary);
}

/* Page hero */
.page-hero {
    background-color: var(--color-bg-muted);
    padding: 3.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
    font-size: clamp(1.9rem, 4vw, 2.75rem);
    margin: 0 0 0.75rem;
    color: var(--color-primary-dark);
}

/* Grids */
.grid-2,
.grid-3 {
    display: grid;
    gap: 1.75rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    margin-top: 2rem;
}

/* Cards */
.card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.card-large ul {
    padding-left: 1.25rem;
    margin: 0 0 1.5rem;
    color: var(--color-text-muted);
}

.card-large li {
    margin-bottom: 0.35rem;
}

/* Split layout */
.split {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    align-items: start;
}

.panel,
.stat-panel {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.stat-panel dl {
    margin: 0;
}

.stat-panel dt {
    font-weight: 600;
    margin-top: 1rem;
    color: var(--color-primary);
}

.stat-panel dt:first-child {
    margin-top: 0;
}

.stat-panel dd {
    margin: 0.25rem 0 0;
    color: var(--color-text-muted);
}

/* Checklist */
.checklist {
    list-style: none;
    padding: 0;
    margin: 1rem 0 2rem;
}

.checklist li {
    position: relative;
    padding-left: 1.75rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

/* Process list */
.process-list {
    counter-reset: step;
    list-style: none;
    padding: 0;
    margin: 0;
}

.process-list li {
    position: relative;
    padding-left: 3.5rem;
    margin-bottom: 2rem;
}

.process-list li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 2.25rem;
    height: 2.25rem;
    background-color: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 700;
}

.process-list strong {
    display: block;
    font-size: 1.15rem;
    color: var(--color-primary-dark);
    margin-bottom: 0.35rem;
}

.process-list p {
    margin: 0;
    color: var(--color-text-muted);
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

.data-table caption {
    text-align: left;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text-muted);
}

.data-table th,
.data-table td {
    border: 1px solid var(--color-border);
    padding: 0.85rem 1rem;
    text-align: left;
    vertical-align: top;
}

.data-table thead {
    background-color: var(--color-primary);
    color: #fff;
}

.data-table tbody tr:nth-child(even) {
    background-color: var(--color-bg-muted);
}

/* Notes */
.note {
    background-color: #eef7f6;
    border-left: 4px solid var(--color-accent);
    padding: 1rem 1.25rem;
    color: var(--color-text-muted);
    border-radius: 0 var(--radius) var(--radius) 0;
}

/* Form */
.contact-form {
    background-color: var(--color-bg-muted);
    padding: 1.75rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    background-color: var(--color-bg);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-color: var(--color-primary);
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
}

.form-checkbox input {
    width: auto;
    margin-top: 0.3rem;
}

.form-checkbox label {
    margin: 0;
    font-weight: 400;
}

/* Footer */
.site-footer {
    background-color: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: 3rem 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-grid .logo {
    color: #fff;
}

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

.footer-grid li {
    margin-bottom: 0.5rem;
}

.footer-grid a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-grid a:hover {
    color: #fff;
}

.copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 1.5rem;
    margin: 0;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        align-items: stretch;
        padding: 1rem 4%;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow);
        gap: 0.5rem;
    }

    .nav-menu.is-open {
        display: flex;
    }

    .nav-menu a {
        display: block;
        padding: 0.75rem 0;
    }

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

    .hero {
        padding: 3rem 0;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}