/* ============================================================
   Estuary Data — style.css
   ============================================================ */

/* --- Reset & base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --teal:       #1B6B6B;
  --teal-dark:  #145555;
  --slate:      #2D4A6B;
  --bg:         #F8F9FA;
  --bg-alt:     #EEF2F5;
  --text:       #1A1A2E;
  --text-muted: #5A6070;
  --white:      #FFFFFF;
  --border:     #D8DDE6;

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.10);

  --max-width: 1100px;
  --section-pad: 80px 24px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--white);
}

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

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

a:hover { text-decoration: underline; }

h1, h2, h3 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--text);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
h3 { font-size: 1.2rem; }

p + p { margin-top: 1em; }

/* --- Layout helpers --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  text-align: center;
  margin-bottom: 12px;
}

.section-sub {
  text-align: center;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 56px;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  padding: 11px 24px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--teal-dark);
  border-color: var(--teal-dark);
  text-decoration: none;
}

.btn-lg {
  font-size: 1.05rem;
  padding: 14px 32px;
}

.btn-full { width: 100%; text-align: center; }


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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text);
}

.logo:hover { text-decoration: none; }

.logo-mark {
  font-size: 1.6rem;
  color: var(--teal);
  font-weight: 700;
  line-height: 1;
}

.logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* Nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s;
}

.site-nav a:not(.btn):hover {
  color: var(--teal);
  text-decoration: none;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding: 80px 24px 72px;
  background: linear-gradient(135deg, #F0F6F6 0%, #F8F9FA 60%, #F0F4F8 100%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content { max-width: 520px; }

.hero h1 {
  margin-bottom: 20px;
  color: var(--text);
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.6;
}

/* Flow diagram */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flow-diagram {
  display: flex;
  align-items: center;
  gap: 16px;
}

.flow-node {
  background: var(--white);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  box-shadow: var(--shadow);
  white-space: nowrap;
}

.flow-node--center {
  background: var(--teal);
  border-color: var(--teal);
  padding: 18px 22px;
  border-radius: 50%;
}

.flow-logo-mark {
  font-size: 1.6rem;
  color: var(--white);
  font-weight: 700;
  line-height: 1;
}

.flow-arrow {
  font-size: 1.2rem;
  color: var(--teal);
  font-weight: 700;
}


/* ============================================================
   Services
   ============================================================ */
.services {
  padding: var(--section-pad);
  background: var(--white);
}

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

.service-card {
  background: var(--bg);
  border-radius: 12px;
  padding: 36px 28px;
  transition: box-shadow 0.2s;
}

.service-card:hover {
  box-shadow: var(--shadow-md);
}

.service-icon {
  color: var(--teal);
  margin-bottom: 20px;
}

.service-card h3 {
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.97rem;
}


/* ============================================================
   Who We Serve
   ============================================================ */
.who-we-serve {
  padding: var(--section-pad);
  background: var(--teal);
  color: var(--white);
}

.who-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 64px;
  align-items: center;
}

.who-content h2 {
  color: var(--white);
  margin-bottom: 20px;
}

.who-content p {
  color: rgba(255,255,255,0.85);
  max-width: 560px;
}

.who-content strong {
  color: var(--white);
}

.who-stats {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  margin-top: 4px;
}


/* ============================================================
   How It Works
   ============================================================ */
.how-it-works {
  padding: var(--section-pad);
  background: var(--bg);
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 700px;
  margin: 0 auto;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  left: 23px;
  top: 28px;
  bottom: 28px;
  width: 2px;
  background: var(--border);
}

.step {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  padding: 32px 0;
  position: relative;
  z-index: 1;
}

.step + .step {
  border-top: none;
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--teal);
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 4px var(--bg);
}

.step-content h3 {
  margin-bottom: 8px;
  padding-top: 10px;
}

.step-content p {
  color: var(--text-muted);
}


/* ============================================================
   Case Study
   ============================================================ */
.case-study {
  padding: var(--section-pad);
  background: var(--white);
}

.case-study-card {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg);
  border-radius: 16px;
  padding: 52px 56px;
  border-left: 5px solid var(--teal);
}

.case-study-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 16px;
}

.case-study-card h2 {
  margin-bottom: 20px;
}

.case-study-card p {
  color: var(--text-muted);
}

.testimonial-placeholder {
  margin-top: 32px;
  padding: 20px 24px;
  background: var(--bg-alt);
  border-radius: var(--radius);
  border-left: 3px solid var(--border);
  display: none; /* hidden until a real testimonial is added */
}


/* ============================================================
   Contact
   ============================================================ */
.contact {
  padding: var(--section-pad);
  background: var(--bg);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 72px;
  align-items: start;
}

.contact-intro h2 { margin-bottom: 16px; }

.contact-intro p { color: var(--text-muted); }

.contact-email {
  margin-top: 24px !important;
  font-size: 1rem;
  font-weight: 500;
}

.contact-email a {
  color: var(--teal);
}

/* Form */
.contact-form-wrap {
  background: var(--white);
  border-radius: 12px;
  padding: 40px;
  box-shadow: var(--shadow);
}

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

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  font-family: var(--font);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  transition: border-color 0.15s;
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--teal);
}

.form-group input.error,
.form-group textarea.error {
  border-color: #C0392B;
}

/* Success state */
.form-success {
  text-align: center;
  padding: 40px 20px;
}

.form-success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--teal);
  color: var(--white);
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.form-success h3 { margin-bottom: 8px; }

.form-success p { color: var(--text-muted); }


/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--text);
  color: rgba(255,255,255,0.75);
  padding: 48px 24px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.logo--footer .logo-text { color: var(--white); }

.logo--footer .logo-mark { color: rgba(255,255,255,0.9); }

.footer-tagline {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.75);
  transition: color 0.15s;
}

.footer-links a:hover { color: var(--white); text-decoration: none; }

.footer-copy {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}


/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  :root { --section-pad: 60px 24px; }

  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { justify-content: flex-start; }
  .hero-content { max-width: 100%; }

  .services-grid { grid-template-columns: 1fr; gap: 20px; }

  .who-inner { grid-template-columns: 1fr; gap: 40px; }
  .who-stats { flex-direction: row; justify-content: flex-start; gap: 40px; }

  .contact-inner { grid-template-columns: 1fr; gap: 40px; }

  .case-study-card { padding: 36px 32px; }
}

@media (max-width: 640px) {
  :root { --section-pad: 48px 20px; }

  .nav-toggle { display: flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    gap: 0;
  }

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

  .site-nav a:not(.btn) {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }

  .site-nav .btn {
    margin-top: 16px;
    text-align: center;
  }

  .hero { padding: 48px 20px 40px; }

  .flow-diagram {
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .case-study-card { padding: 28px 24px; }

  .contact-form-wrap { padding: 28px 20px; }

  .who-stats { flex-wrap: wrap; gap: 24px; }

  .steps::before { display: none; }
  .step { gap: 20px; }
}