/* ==========================================================================
   EVI Advisory — Design System
   🔶 Placeholder palette/type per CLAUDE.md — swap once client brand arrives.
   ========================================================================== */

:root {
  /* Color */
  --color-navy-900: #0F172A;
  --color-navy-800: #1B2432;
  --color-navy-700: #2A3648;
  --color-teal-500: #14B8A6;
  --color-teal-600: #0D9488;
  --color-green-500: #22C55E;
  --color-bg: #F8F9FA;
  --color-surface: #FFFFFF;
  --color-text: #1E293B;
  --color-text-muted: #55606E;
  --color-text-inverse: #F8FAFC;
  --color-border: #E2E5E9;

  /* Type */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --fs-sm: clamp(0.875rem, 0.85rem + 0.15vw, 0.95rem);
  --fs-base: clamp(1rem, 0.97rem + 0.2vw, 1.125rem);
  --fs-lg: clamp(1.15rem, 1.1rem + 0.3vw, 1.35rem);
  --fs-xl: clamp(1.5rem, 1.4rem + 0.6vw, 1.9rem);
  --fs-2xl: clamp(1.9rem, 1.7rem + 1vw, 2.6rem);
  --fs-3xl: clamp(2.3rem, 1.9rem + 2vw, 3.5rem);
  --lh-tight: 1.15;
  --lh-normal: 1.6;

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: 6.5rem;

  /* Layout */
  --max-width: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.1);
  --transition: 160ms ease;
}

/* Reset */
* , *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, figure { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: var(--lh-tight);
  color: var(--color-navy-900);
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

section { padding-block: var(--space-8); }

/* Focus visibility for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-teal-600);
  outline-offset: 2px;
}

/* Links within body copy */
.text-link {
  color: var(--color-teal-600);
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}
.text-link:hover { border-color: var(--color-teal-600); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--fs-sm);
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-teal-500);
  color: var(--color-navy-900);
}
.btn-primary:hover { background: var(--color-teal-600); color: var(--color-text-inverse); }

.btn-outline {
  background: transparent;
  border-color: rgba(248, 250, 252, 0.5);
  color: var(--color-text-inverse);
}
.btn-outline:hover { background: rgba(248, 250, 252, 0.12); }

.btn-outline-dark {
  background: transparent;
  border-color: var(--color-navy-900);
  color: var(--color-navy-900);
}
.btn-outline-dark:hover { background: var(--color-navy-900); color: var(--color-text-inverse); }

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 249, 250, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}

.nav-logo {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-navy-900);
  letter-spacing: -0.01em;
}
.nav-logo span { color: var(--color-teal-600); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links a {
  font-weight: 500;
  font-size: var(--fs-sm);
  color: var(--color-navy-800);
  padding-block: var(--space-1);
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-teal-600);
  border-color: var(--color-teal-600);
}

.nav-cta { margin-left: var(--space-2); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-2);
}
.nav-toggle svg { width: 26px; height: 26px; color: var(--color-navy-900); }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }
  .nav-links.is-open { max-height: 400px; }
  .nav-links a {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border);
    border-left: 2px solid transparent;
  }
  .nav-links a:hover,
  .nav-links a[aria-current="page"] {
    border-bottom-color: var(--color-border);
    border-left-color: var(--color-teal-600);
  }
  .nav-cta { margin: var(--space-4) var(--space-5); }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 84vh;
  display: flex;
  align-items: center;
  color: var(--color-text-inverse);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.78) 0%, rgba(15, 23, 42, 0.62) 45%, rgba(15, 23, 42, 0.88) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
}
.hero-eyebrow {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-teal-500);
  margin-bottom: var(--space-4);
}
.hero h1 { color: var(--color-text-inverse); margin-bottom: var(--space-5); }
.hero p.lead {
  color: rgba(248, 250, 252, 0.88);
  font-size: var(--fs-lg);
  margin-bottom: var(--space-6);
  max-width: 54ch;
}
.hero-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }

/* Simplified page banner (no photo) for interior pages */
.page-banner {
  background: linear-gradient(135deg, var(--color-navy-900) 0%, var(--color-navy-800) 60%, var(--color-navy-700) 100%);
  color: var(--color-text-inverse);
  padding-block: var(--space-8) var(--space-7);
  position: relative;
  overflow: hidden;
}
.page-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 85% 20%, rgba(20, 184, 166, 0.25), transparent 45%);
}
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 { color: var(--color-text-inverse); }
.page-banner p.lead {
  color: rgba(248, 250, 252, 0.82);
  font-size: var(--fs-lg);
  max-width: 60ch;
  margin-top: var(--space-3);
}

/* ==========================================================================
   Cards / grids
   ========================================================================== */
.section-heading { max-width: 640px; margin-bottom: var(--space-7); }
.section-heading .eyebrow {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-teal-600);
  margin-bottom: var(--space-3);
}

.grid {
  display: grid;
  gap: var(--space-6);
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(20, 184, 166, 0.12);
  color: var(--color-teal-600);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}
.card-icon svg { width: 22px; height: 22px; }

.card h3 { margin-bottom: var(--space-3); font-size: var(--fs-lg); }
.card p { margin: 0; }

.card-link {
  display: inline-block;
  margin-top: var(--space-4);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-teal-600);
}

/* Section variants */
.section-alt { background: var(--color-surface); border-block: 1px solid var(--color-border); }

/* CTA band */
.cta-band {
  background: var(--color-navy-900);
  color: var(--color-text-inverse);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.cta-band h2 { color: var(--color-text-inverse); margin-bottom: var(--space-2); font-size: var(--fs-xl); }
.cta-band p { color: rgba(248, 250, 252, 0.78); margin: 0; }

/* Photo credit caption */
.photo-credit {
  font-size: 0.75rem;
  color: rgba(248, 250, 252, 0.6);
  position: relative;
  z-index: 1;
  margin-top: var(--space-3);
}
.photo-credit a { text-decoration: underline; }

/* About page */
.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-7);
  align-items: start;
}
@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; }
}
.avatar-placeholder {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-navy-900), var(--color-teal-600));
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.about-credentials { margin-top: var(--space-5); }
.about-credentials li {
  display: flex;
  gap: var(--space-3);
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}
.about-credentials li:last-child { border-bottom: none; }
.about-credentials strong { color: var(--color-navy-900); }

/* Services list */
.service-row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: var(--space-5);
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}
.service-row:first-child { padding-top: 0; }
.service-row:last-child { border-bottom: none; }
.service-number {
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--color-teal-500);
}
@media (max-width: 640px) {
  .service-row { grid-template-columns: 1fr; }
}

/* Contact page */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
}
@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.contact-info-item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.contact-info-item .card-icon { flex-shrink: 0; margin-bottom: 0; }
.contact-info-item h4 { margin-bottom: var(--space-1); }
.contact-info-item p { margin: 0; }

.form-group { margin-bottom: var(--space-5); }
.form-group label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-navy-900);
  margin-bottom: var(--space-2);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  font: inherit;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-teal-500);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
  outline: none;
}
.form-group textarea { resize: vertical; min-height: 140px; }
.form-note { font-size: var(--fs-sm); margin-top: var(--space-4); }
.form-success {
  display: none;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #15803d;
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-5);
  font-size: var(--fs-sm);
  font-weight: 600;
}
.form-success.is-visible { display: block; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-navy-900);
  color: rgba(248, 250, 252, 0.7);
  padding-block: var(--space-7) var(--space-6);
  margin-top: var(--space-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand { color: var(--color-text-inverse); font-weight: 800; font-size: 1.1rem; margin-bottom: var(--space-3); }
.footer-brand span { color: var(--color-teal-500); }
.footer-col h4 { color: var(--color-text-inverse); font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-4); }
.footer-col a, .footer-col p { display: block; font-size: var(--fs-sm); margin-bottom: var(--space-3); color: rgba(248, 250, 252, 0.7); }
.footer-col a:hover { color: var(--color-teal-500); }
.footer-bottom {
  border-top: 1px solid rgba(248, 250, 252, 0.12);
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: var(--fs-sm);
}