/* ===== RCH Connect — Main Stylesheet ===== */

:root {
    --color-navy-900: #0a1628;
    --color-navy-800: #0f1f3a;
    --color-navy-700: #162d54;
    --color-navy-600: #1d3a6e;
    --color-blue-500: #2563eb;
    --color-blue-400: #3b82f6;
    --color-blue-300: #60a5fa;
    --color-blue-200: #93bbfd;
    --color-blue-100: #dbeafe;
    --color-blue-50: #eff6ff;
    --color-teal-400: #14b8a6;
    --color-teal-500: #0d9488;
    --color-slate-900: #0f172a;
    --color-slate-800: #1e293b;
    --color-slate-700: #334155;
    --color-slate-600: #475569;
    --color-slate-500: #64748b;
    --color-slate-400: #94a3b8;
    --color-slate-300: #cbd5e1;
    --color-slate-200: #e2e8f0;
    --color-slate-100: #f1f5f9;
    --color-slate-50: #f8fafc;
    --color-white: #ffffff;
    --color-black: #000000;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 8px 10px rgba(0, 0, 0, 0.06);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-slate-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

address {
    font-style: normal;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.25s ease;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-blue-500);
    color: var(--color-white);
    border-color: var(--color-blue-500);
}

.btn-primary:hover {
    background-color: var(--color-navy-600);
    border-color: var(--color-navy-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-blue-500);
    border-color: var(--color-blue-500);
}

.btn-secondary:hover {
    background-color: var(--color-blue-500);
    color: var(--color-white);
    transform: translateY(-1px);
}

.btn-full {
    width: 100%;
}

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-slate-200);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--color-navy-900);
    letter-spacing: -0.3px;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: var(--color-blue-500);
    color: var(--color-white);
    border-radius: var(--radius-sm);
    font-size: 16px;
}

.logo-accent {
    color: var(--color-blue-500);
}

.main-nav ul {
    display: flex;
    gap: 8px;
}

.main-nav a {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    color: var(--color-slate-600);
    transition: all 0.2s ease;
}

.main-nav a:hover {
    color: var(--color-navy-900);
    background-color: var(--color-blue-50);
}

/* ===== Hero ===== */
.hero {
    position: relative;
    padding: 100px 0 80px;
    background: linear-gradient(160deg, var(--color-blue-50) 0%, var(--color-white) 50%, var(--color-slate-50) 100%);
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-blue-500);
    background-color: var(--color-blue-50);
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    color: var(--color-navy-900);
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-slate-600);
    max-width: 500px;
    line-height: 1.6;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-graphic {
    position: relative;
    width: 380px;
    height: 380px;
}

.node {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--color-blue-500);
    box-shadow: 0 0 0 8px rgba(37, 99, 235, 0.15), 0 0 0 18px rgba(37, 99, 235, 0.08);
    z-index: 2;
}

.node-1 { top: 40px; left: 120px; }
.node-2 { top: 100px; right: 80px; background-color: var(--color-teal-400); box-shadow: 0 0 0 8px rgba(20, 184, 166, 0.15), 0 0 0 18px rgba(20, 184, 166, 0.08); }
.node-3 { bottom: 60px; left: 60px; background-color: var(--color-navy-600); box-shadow: 0 0 0 8px rgba(29, 58, 110, 0.15), 0 0 0 18px rgba(29, 58, 110, 0.08); }
.node-4 { bottom: 100px; right: 40px; width: 16px; height: 16px; }

.edge {
    position: absolute;
    z-index: 1;
    background-color: var(--color-slate-300);
}

.edge-1 { top: 32px; left: 130px; width: 180px; height: 1px; transform: rotate(25deg); transform-origin: left center; }
.edge-2 { top: 110px; left: 105px; width: 200px; height: 1px; transform: rotate(55deg); transform-origin: left center; }
.edge-3 { top: 75px; left: 115px; width: 160px; height: 1px; transform: rotate(-15deg); transform-origin: left center; background-color: var(--color-slate-400); }
.edge-4 { top: 140px; left: 85px; width: 140px; height: 1px; transform: rotate(110deg); transform-origin: left center; }
.edge-5 { bottom: 70px; left: 70px; width: 260px; height: 1px; transform: rotate(35deg); transform-origin: left center; background-color: var(--color-slate-400); }

.hero-wave {
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 80px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 80' preserveAspectRatio='none'%3E%3Cpath d='M0 40c240-30 480-30 720 0s480 30 720 0v40H0V40z' fill='%23ffffff'/%3E%3C/svg%3E") no-repeat bottom;
    background-size: 100% 100%;
}

/* ===== Section Common ===== */
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-blue-500);
    margin-bottom: 12px;
}

.section-title {
    font-size: 38px;
    font-weight: 800;
    color: var(--color-navy-900);
    letter-spacing: -0.5px;
    margin-bottom: 14px;
    line-height: 1.2;
}

.section-desc {
    font-size: 17px;
    color: var(--color-slate-500);
    line-height: 1.6;
}

/* ===== Services ===== */
.services {
    padding: 100px 0;
    background-color: var(--color-white);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.card {
    background-color: var(--color-white);
    border: 1px solid var(--color-slate-200);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    transition: all 0.3s ease;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.card:hover {
    border-color: var(--color-blue-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-blue-50);
    border-radius: var(--radius-md);
    color: var(--color-blue-500);
    margin-bottom: 20px;
}

.card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-navy-900);
    margin-bottom: 10px;
}

.card-desc {
    font-size: 15px;
    color: var(--color-slate-600);
    line-height: 1.6;
    margin-bottom: 18px;
}

.card-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.card-list li {
    font-size: 14px;
    color: var(--color-slate-700);
    padding-left: 20px;
    position: relative;
    line-height: 1.5;
}

.card-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--color-blue-500);
}

/* ===== About ===== */
.about {
    padding: 100px 0;
    background-color: var(--color-slate-50);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content .section-title {
    text-align: left;
}

.about-lead {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-navy-900);
    line-height: 1.45;
    margin-bottom: 16px;
}

.about-lead strong {
    color: var(--color-blue-500);
    font-weight: 700;
}

.about-text {
    font-size: 16px;
    color: var(--color-slate-600);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 500px;
}

.about-stats {
    display: flex;
    gap: 32px;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-navy-900);
    line-height: 1.2;
}

.stat-label {
    font-size: 13px;
    color: var(--color-slate-500);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.about-visual {
    display: flex;
    justify-content: center;
}

.about-card {
    width: 320px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background-color: var(--color-white);
}

.about-card-top {
    height: 120px;
    background: linear-gradient(135deg, var(--color-navy-800) 0%, var(--color-navy-600) 50%, var(--color-blue-500) 100%);
}

.about-card-body {
    padding: 24px 28px 32px;
}

.about-card-title {
    font-size: 20px;
    font-weight: 800;
    color: var(--color-navy-900);
    margin-bottom: 4px;
}

.about-card-sub {
    font-size: 14px;
    color: var(--color-blue-500);
    font-weight: 600;
    margin-bottom: 16px;
}

.about-card-detail {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 14px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--color-slate-200);
}

.about-card-detail span {
    font-size: 14px;
    color: var(--color-slate-600);
}

.about-card-contact {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.about-card-contact span {
    font-size: 14px;
    color: var(--color-slate-600);
}

/* ===== Process ===== */
.process {
    padding: 100px 0;
    background-color: var(--color-white);
}

.process-steps {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    align-items: start;
    gap: 0;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    text-align: center;
    padding: 0 12px;
}

.step-marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background-color: var(--color-blue-500);
    color: var(--color-white);
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 16px;
}

.step-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-navy-900);
    margin-bottom: 8px;
}

.step-desc {
    font-size: 14px;
    color: var(--color-slate-500);
    line-height: 1.6;
}

.step-connector {
    width: 48px;
    height: 2px;
    background-color: var(--color-slate-300);
    margin-top: 26px;
    flex-shrink: 0;
}

/* ===== Contact ===== */
.contact {
    padding: 100px 0;
    background-color: var(--color-navy-900);
    color: var(--color-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-tag {
    color: var(--color-blue-300);
}

.contact-info .section-title {
    color: var(--color-white);
}

.contact-text {
    font-size: 16px;
    color: var(--color-slate-400);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 440px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-slate-400);
    font-size: 15px;
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--color-blue-400);
}

.contact-item a {
    color: var(--color-blue-300);
    font-weight: 500;
}

.contact-item a:hover {
    color: var(--color-blue-100);
    text-decoration: underline;
}

.contact-item address {
    color: var(--color-slate-400);
}

.contact-form {
    background-color: var(--color-navy-800);
    border: 1px solid var(--color-navy-700);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-slate-200);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--color-navy-900);
    border: 1px solid var(--color-navy-600);
    border-radius: var(--radius-sm);
    color: var(--color-white);
    font-size: 15px;
    font-family: var(--font-sans);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
}

.form-input::placeholder {
    color: var(--color-slate-600);
}

.form-input:focus {
    border-color: var(--color-blue-500);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-feedback {
    margin-top: 12px;
    font-size: 14px;
    min-height: 20px;
}

.form-feedback.success {
    color: var(--color-teal-400);
}

.form-feedback.error {
    color: #f87171;
}

/* ===== Footer ===== */
.site-footer {
    background-color: var(--color-navy-900);
    border-top: 1px solid var(--color-navy-700);
    padding: 64px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-brand .logo-text {
    font-size: 22px;
    font-weight: 800;
    color: var(--color-white);
    display: block;
    margin-bottom: 8px;
}

.footer-brand .logo-accent {
    color: var(--color-blue-400);
}

.footer-tagline {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-blue-300);
    margin-bottom: 12px;
}

.footer-desc {
    font-size: 14px;
    color: var(--color-slate-500);
    line-height: 1.6;
    max-width: 300px;
}

.footer-heading {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--color-slate-300);
    margin-bottom: 16px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links li {
    font-size: 14px;
    color: var(--color-slate-500);
    line-height: 1.5;
}

.footer-links a {
    color: var(--color-slate-500);
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--color-blue-300);
}

.footer-bottom {
    padding-top: 28px;
    border-top: 1px solid var(--color-navy-700);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--color-slate-600);
    text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-visual {
        display: none;
    }

    .hero-title {
        font-size: 40px;
    }

    .card-grid {
        grid-template-columns: 1fr 1fr;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .process-steps {
        grid-template-columns: 1fr 1fr;
        gap: 32px 0;
        row-gap: 48px;
    }

    .step-connector {
        display: none;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 640px) {
    .site-header .container {
        height: 60px;
    }

    .logo {
        font-size: 18px;
    }

    .logo-icon {
        width: 30px;
        height: 30px;
        font-size: 14px;
    }

    .main-nav a {
        font-size: 13px;
        padding: 6px 10px;
    }

    .hero {
        padding: 60px 0 50px;
    }

    .hero-title {
        font-size: 30px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-wrap: wrap;
        gap: 20px;
    }

    .process-steps {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 24px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .section-title {
        font-size: 28px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .services,
    .about,
    .process,
    .contact {
        padding: 60px 0;
    }
}