/* ==========================================================================
   Irwinsoft — Design System
   Legal-technology consulting & custom software for law firms.
   ========================================================================== */

/* ---- Design tokens ------------------------------------------------------- */
:root {
  /* Color */
  --ink-900: #0B1E33;   /* deep navy — anchor */
  --ink-800: #10273f;
  --ink-700: #1c3a58;
  --ink-600: #33506e;
  --slate-600: #4b5a6b;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #eef2f6;
  --paper: #f7f8fa;       /* body background */
  --white: #ffffff;
  --text: #111827;        /* body ink */
  --text-soft: #46566a;
  --accent: #1f8f89;      /* refined teal */
  --accent-bright: #2da6a0;
  --accent-tint: rgba(45, 166, 160, 0.12);
  --accent-on-dark: #4fd1c9;

  /* Typography */
  --font-serif: "Spectral", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Spacing scale */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6.5rem;

  /* Layout */
  --maxw: 1080px;
  --radius: 14px;
  --radius-sm: 9px;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(11, 30, 51, 0.06), 0 1px 3px rgba(11, 30, 51, 0.05);
  --shadow-md: 0 10px 30px -12px rgba(11, 30, 51, 0.18);
  --shadow-lg: 0 30px 60px -20px rgba(11, 30, 51, 0.28);
  --ring: 0 0 0 3px var(--accent-tint);
  --border: 1px solid var(--slate-200);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--paper);
  line-height: 1.65;
  font-size: 1.0625rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--accent); text-decoration: none; transition: color 0.2s var(--ease); }
a:hover { color: var(--accent-bright); }

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--ink-900);
  margin: 0 0 0.6em;
}

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink-900);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 200;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---- Layout helpers ------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section { padding-block: var(--space-7); }
.section--tight { padding-block: var(--space-6); }

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.9rem;
}

.section-title { font-size: clamp(1.8rem, 3.6vw, 2.6rem); max-width: 22ch; }
.section-lede {
  font-size: 1.15rem;
  color: var(--text-soft);
  max-width: 60ch;
  margin-top: 0.4rem;
}

/* ---- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1;
  padding: 0.9rem 1.5rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background 0.2s var(--ease),
    box-shadow 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary { background: var(--accent); color: #fff; box-shadow: var(--shadow-md); }
.btn--primary:hover { background: var(--accent-bright); color: #fff; }

.btn--ghost { background: transparent; color: var(--ink-900); border-color: var(--slate-200); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn--on-dark { background: rgba(255, 255, 255, 0.06); color: #fff; border-color: rgba(255, 255, 255, 0.22); }
.btn--on-dark:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }

.btn .arrow { transition: transform 0.2s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* ---- Header / nav -------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 248, 250, 0.8);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--slate-200);
  box-shadow: var(--shadow-sm);
}

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

.brand { display: inline-flex; align-items: center; gap: 0.6rem; }
.brand:hover { color: inherit; }
.wordmark { font-family: var(--font-serif); font-weight: 600; font-size: 1.3rem; color: var(--ink-900); letter-spacing: -0.02em; }
.brand .dot { color: var(--accent); }

.nav-links { display: flex; align-items: center; gap: 2rem; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: var(--slate-600);
  font-weight: 500;
  font-size: 0.98rem;
  position: relative;
}
.nav-links a:hover { color: var(--ink-900); }
.nav-actions { display: flex; align-items: center; gap: 1.25rem; }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--slate-200);
  border-radius: 10px;
  width: 44px; height: 44px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: "";
  display: block;
  width: 20px; height: 2px;
  background: var(--ink-900);
  position: relative;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---- Hero ---------------------------------------------------------------- */
.hero {
  position: relative;
  background:
    radial-gradient(1100px 500px at 78% -10%, rgba(45, 166, 160, 0.20), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(45, 166, 160, 0.10), transparent 55%),
    linear-gradient(160deg, var(--ink-900), var(--ink-800) 70%);
  color: #eaf1f7;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(70% 60% at 60% 20%, #000 40%, transparent 100%);
  mask-image: radial-gradient(70% 60% at 60% 20%, #000 40%, transparent 100%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-inner { padding-block: clamp(4.5rem, 9vw, 8rem); max-width: 46rem; }
.hero .eyebrow { color: var(--accent-on-dark); }
.hero h1 {
  color: #fff;
  font-size: clamp(2.4rem, 5.6vw, 4rem);
  font-weight: 500;
  margin-bottom: 0.5em;
}
.hero h1 .accent { color: var(--accent-on-dark); }
.hero-sub {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: #b9c8d6;
  max-width: 44ch;
  margin-bottom: 2rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero-meta {
  margin-top: 3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  color: #90a4b8;
  font-size: 0.92rem;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 0.5rem; }
.hero-meta .tick { color: var(--accent-on-dark); }

/* ---- Services ------------------------------------------------------------ */
.grid { display: grid; gap: 1.5rem; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #d5dee7; }

.card .icon {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--accent-tint);
  color: var(--accent);
  margin-bottom: 1.2rem;
}
.card h3 { font-size: 1.3rem; }
.card p { color: var(--text-soft); font-size: 1rem; margin-bottom: 0; }

/* ---- Approach ------------------------------------------------------------ */
.approach { background: var(--white); border-block: var(--border); }
.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2.5rem 3rem; margin-top: 2.5rem; }
.value { display: flex; gap: 1rem; }
.value .num {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 600;
  padding-top: 0.15rem;
  min-width: 2ch;
}
.value h3 { font-size: 1.18rem; margin-bottom: 0.35rem; }
.value p { color: var(--text-soft); font-size: 0.98rem; margin: 0; }

/* ---- Engagements --------------------------------------------------------- */
.engage-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin-top: 2.5rem; }
.engage {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}
.engage h3 { font-size: 1.25rem; display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.engage .tag { font-family: var(--font-sans); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.04em; color: var(--accent); background: var(--accent-tint); padding: 0.25rem 0.6rem; border-radius: 999px; text-transform: uppercase; }
.engage p { color: var(--text-soft); font-size: 0.98rem; }
.engage ul { margin: 0.5rem 0 0; padding-left: 1.1rem; color: var(--text-soft); font-size: 0.96rem; }
.engage li { margin-bottom: 0.35rem; }

/* ---- About --------------------------------------------------------------- */
.about { background: var(--white); border-block: var(--border); }
.about-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 3.5rem; align-items: center; }
.about p { font-size: 1.08rem; color: var(--text-soft); }
.about .signature { font-family: var(--font-serif); font-size: 1.3rem; color: var(--ink-900); margin-top: 1.2rem; }
.about-aside {
  background: linear-gradient(160deg, var(--ink-900), var(--ink-700));
  color: #dbe6f0;
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}
.about-aside h3 { color: #fff; font-size: 1.15rem; }
.about-aside dl { margin: 1.2rem 0 0; display: grid; gap: 1rem; }
.about-aside dt { font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent-on-dark); margin-bottom: 0.2rem; }
.about-aside dd { margin: 0; color: #eaf1f7; font-size: 1rem; }

/* ---- Contact ------------------------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 3.5rem; align-items: start; }
.contact-intro .btn { margin-top: 0.5rem; }
.contact-detail { margin-top: 2rem; display: grid; gap: 1rem; }
.contact-detail a { font-weight: 600; }
.contact-detail .label { font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--slate-500); display: block; margin-bottom: 0.15rem; }

.form {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}
.field { margin-bottom: 1.25rem; }
.field label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 0.4rem; color: var(--ink-900); }
.field input, .field textarea {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--paper);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-sm);
  padding: 0.8rem 0.9rem;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease);
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
  box-shadow: var(--ring);
}
.field textarea { resize: vertical; min-height: 130px; }
.field.hp { position: absolute; left: -9999px; }
.form .btn { width: 100%; justify-content: center; }
.form-note { font-size: 0.85rem; color: var(--slate-500); margin-top: 1rem; text-align: center; }
.form-status { margin-top: 1rem; padding: 0.9rem 1rem; border-radius: var(--radius-sm); font-size: 0.95rem; display: none; }
.form-status.is-error { display: block; background: #fdecec; color: #a02525; }

.form-success {
  text-align: center;
  padding: 1.5rem 1rem;
}
.form-success .check {
  width: 52px; height: 52px; margin: 0 auto 1rem;
  display: grid; place-items: center;
  border-radius: 50%; background: var(--accent-tint); color: var(--accent);
}

/* ---- Footer -------------------------------------------------------------- */
.site-footer {
  background: var(--ink-900);
  color: #9db0c2;
  padding-block: var(--space-5) var(--space-4);
}
.footer-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem; padding-bottom: 2.5rem; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-brand .wordmark { color: #fff; }
.footer-brand p { color: #7f93a6; max-width: 32ch; margin-top: 0.8rem; font-size: 0.95rem; }
.footer-links { display: flex; gap: 3.5rem; flex-wrap: wrap; }
.footer-col h4 { font-family: var(--font-sans); color: #cdd9e5; font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; margin: 0 0 1rem; font-weight: 650; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.footer-col a { color: #9db0c2; font-size: 0.96rem; }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding-top: 1.75rem; font-size: 0.88rem; color: #6f8398; }

/* ---- Legal / policy pages ------------------------------------------------ */
.page-hero {
  background: linear-gradient(160deg, var(--ink-900), var(--ink-800));
  color: #eaf1f7;
  padding-block: clamp(3.5rem, 8vw, 6rem) 3rem;
}
.page-hero h1 { color: #fff; font-size: clamp(2rem, 4.5vw, 3rem); }
.page-hero p { color: #9db0c2; margin: 0; }
.page-hero .updated { color: var(--accent-on-dark); font-size: 0.9rem; margin-top: 0.75rem; }

.legal { max-width: 760px; }
.legal h2 { font-size: 1.5rem; margin-top: 2.5rem; }
.legal h3 { font-size: 1.15rem; margin-top: 1.75rem; }
.legal p, .legal li { color: var(--text-soft); }
.legal ul { padding-left: 1.2rem; }
.legal li { margin-bottom: 0.5rem; }
.legal a { font-weight: 600; }
.legal .callout {
  background: var(--accent-tint);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
  color: var(--text-soft);
  font-size: 0.95rem;
  margin: 1.5rem 0;
}

/* ---- Motion / reveal ----------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover { transform: none; }
}

/* ---- Responsive ---------------------------------------------------------- */
@media (max-width: 900px) {
  .grid--3 { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .engage-grid { grid-template-columns: 1fr; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-aside { order: -1; }
}

@media (max-width: 720px) {
  .nav-links, .nav-actions .btn { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-header.nav-open .nav-links {
    display: flex;
    position: absolute;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--white);
    border-bottom: 1px solid var(--slate-200);
    padding: 0.5rem 1.5rem 1.25rem;
    box-shadow: var(--shadow-md);
  }
  .site-header.nav-open .nav-links li { width: 100%; }
  .site-header.nav-open .nav-links a { display: block; padding: 0.85rem 0; border-bottom: 1px solid var(--slate-100); width: 100%; }
  .section { padding-block: var(--space-6); }
  .footer-top { flex-direction: column; }
}