/* Tamalpais Systems LLC - shared stylesheet */

:root {
  --forest-900: #0f2a1d;
  --forest-700: #1b4332;
  --forest-600: #2d5a3d;
  --forest-300: #74a57f;
  --forest-200: #95d5b2;
  --forest-100: #d8e8df;
  --char-900: #1a1d20;
  --char-700: #2b2d2f;
  --char-500: #4a4e52;
  --char-300: #8c9196;
  --paper: #f7f7f5;
  --paper-2: #eef0eb;
  --line: #d6d8d2;
  --accent: #c8a35a;
  --shadow: 0 10px 30px rgba(15, 42, 29, 0.08);
  --radius: 14px;
  --maxw: 1180px;
  --ease: cubic-bezier(.2,.7,.2,1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--char-700);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
a { color: var(--forest-700); text-decoration: none; }
a:hover { color: var(--forest-600); }

h1, h2, h3, h4 {
  font-family: "Helvetica Neue", Arial, sans-serif;
  color: var(--char-900);
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2.2rem, 4.8vw, 3.6rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 700; }

p { margin: 0 0 1em; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 247, 245, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--char-900);
  font-weight: 800;
  letter-spacing: 0.01em;
}
.brand img { height: 30px; width: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-text .b1 { font-size: 0.98rem; }
.brand-text .b2 { font-size: 0.62rem; color: var(--forest-600); letter-spacing: 0.22em; margin-top: 3px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a:not(.btn) {
  color: var(--char-700);
  font-weight: 500;
  font-size: 0.96rem;
}
.nav-links a:not(.btn):hover { color: var(--forest-700); }
.nav-links a:not(.btn).active { color: var(--forest-700); font-weight: 700; }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid transparent;
  transition: transform .2s var(--ease), background .2s var(--ease), color .2s var(--ease);
  cursor: pointer;
}
.btn-primary {
  background: var(--forest-700);
  color: var(--paper);
}
.btn-primary:hover {
  background: var(--forest-900);
  color: var(--paper);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--forest-700);
  border-color: var(--forest-700);
}
.btn-ghost:hover { background: var(--forest-700); color: var(--paper); }

.hamburger {
  display: none;
  background: none;
  border: 0;
  width: 36px;
  height: 36px;
  cursor: pointer;
  padding: 0;
}
.hamburger span {
  display: block;
  height: 2px;
  background: var(--char-900);
  margin: 6px 0;
  border-radius: 2px;
}

/* Hero - full bleed photo with Ken Burns motion */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 88vh;
  display: flex;
  align-items: center;
  background-color: var(--forest-900);
}
.hero-bg {
  position: absolute;
  inset: -4%;
  /* Tries local file first, falls back to Unsplash hotlink for the photo at
     https://unsplash.com/photos/aerial-photo-of-mountain-BJyjgEdNTPs
     If neither loads, the forest-700 background-color shows. */
  background-image:
    url('hero-mt-tam.jpg'),
    url('https://source.unsplash.com/BJyjgEdNTPs/2400x1200');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-color: var(--forest-700);
  animation: kenburns 28s ease-in-out infinite alternate;
  will-change: transform;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15,42,29,0.35) 0%, rgba(15,42,29,0.55) 60%, rgba(15,42,29,0.78) 100%);
}
@keyframes kenburns {
  0%   { transform: scale(1) translate(0, 0); }
  100% { transform: scale(1.08) translate(-1.5%, -1%); }
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: 110px 0 80px;
  color: var(--paper);
}
.hero-content .eyebrow {
  color: var(--forest-200);
}
.hero-content h1 {
  color: var(--paper);
  margin-bottom: 18px;
  text-shadow: 0 2px 24px rgba(15,42,29,0.4);
}
.hero-content p.lead {
  font-size: 1.18rem;
  color: rgba(247,247,245,0.92);
  max-width: 600px;
  margin-bottom: 32px;
  text-shadow: 0 2px 16px rgba(15,42,29,0.4);
}
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--forest-700);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-content .btn-primary {
  background: var(--paper);
  color: var(--forest-900);
}
.hero-content .btn-primary:hover {
  background: var(--forest-200);
  color: var(--forest-900);
}
.hero-content .btn-ghost {
  border-color: rgba(247,247,245,0.7);
  color: var(--paper);
}
.hero-content .btn-ghost:hover {
  background: var(--paper);
  color: var(--forest-900);
}
@media (prefers-reduced-motion: reduce) {
  .hero-bg { animation: none; }
}

/* Section */
section { padding: 80px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-head .eyebrow { display: block; }
.section-head p { color: var(--char-500); font-size: 1.05rem; }

/* Cards grid */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--forest-300);
}
.card .icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--forest-100);
  color: var(--forest-700);
  margin-bottom: 16px;
}
.card .icon svg { width: 22px; height: 22px; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--char-500); font-size: 0.97rem; margin: 0; }

/* Strip / value props */
.strip {
  background: var(--forest-700);
  color: var(--paper);
}
.strip .container { padding-top: 56px; padding-bottom: 56px; }
.strip h2 { color: var(--paper); }
.strip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 24px;
}
.strip-item .num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--forest-200);
  line-height: 1;
  margin-bottom: 6px;
}
.strip-item p { color: rgba(247,247,245,0.85); margin: 0; font-size: 0.95rem; }

/* Two-column content */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.two-col img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.photo-block {
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: var(--forest-700);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, var(--forest-700), var(--forest-900));
  color: var(--paper);
  border-radius: 20px;
  padding: 48px;
  text-align: center;
  box-shadow: var(--shadow);
}
.cta-band h2 { color: var(--paper); margin-bottom: 12px; }
.cta-band p { color: rgba(247,247,245,0.85); max-width: 620px; margin: 0 auto 24px; }
.cta-band .btn-primary { background: var(--paper); color: var(--forest-900); }
.cta-band .btn-primary:hover { background: var(--forest-200); color: var(--forest-900); }

/* Footer */
.site-footer {
  background: var(--char-900);
  color: rgba(247,247,245,0.78);
  padding: 56px 0 28px;
  font-size: 0.92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.site-footer h4 {
  color: var(--paper);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.site-footer a { color: rgba(247,247,245,0.78); display: block; padding: 4px 0; }
.site-footer a:hover { color: var(--forest-200); }
.footer-brand img { height: 40px; margin-bottom: 12px; filter: invert(1) brightness(1.05); }
.footer-brand p { color: rgba(247,247,245,0.65); font-size: 0.92rem; margin-top: 8px; }
.legal {
  border-top: 1px solid rgba(247,247,245,0.12);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: rgba(247,247,245,0.55);
  font-size: 0.85rem;
}

/* Page header (interior pages) */
.page-header {
  background:
    radial-gradient(800px 300px at 100% 0%, rgba(149,213,178,0.18), transparent 60%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
  padding: 70px 0 50px;
  border-bottom: 1px solid var(--line);
}
.page-header h1 { margin: 8px 0 12px; }
.page-header p { color: var(--char-500); max-width: 640px; font-size: 1.08rem; }

/* Service detail list */
.svc-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.svc {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}
.svc h3 { color: var(--forest-700); margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.svc h3 .dot { width: 10px; height: 10px; border-radius: 999px; background: var(--forest-300); display: inline-block; }
.svc ul { padding-left: 18px; margin: 8px 0 0; color: var(--char-500); }
.svc li { margin-bottom: 4px; }

/* About */
.about-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}
.about-points .pt {
  border-left: 3px solid var(--forest-300);
  padding: 6px 0 6px 16px;
}
.about-points h4 { margin: 0 0 4px; color: var(--char-900); font-size: 1.02rem; }
.about-points p { color: var(--char-500); font-size: 0.96rem; margin: 0; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.contact-info p { margin: 4px 0; color: var(--char-500); }
.contact-info .label {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--forest-700);
  margin-top: 18px;
  font-weight: 700;
}
.contact-info .val { color: var(--char-900); font-size: 1.08rem; font-weight: 600; }

form.contact-form {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}
form.contact-form label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--char-700);
  margin: 14px 0 6px;
  letter-spacing: 0.04em;
}
form.contact-form input,
form.contact-form textarea,
form.contact-form select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font: inherit;
  background: var(--paper-2);
  color: var(--char-900);
  outline: none;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
form.contact-form input:focus,
form.contact-form textarea:focus,
form.contact-form select:focus {
  border-color: var(--forest-300);
  background: var(--paper);
}
form.contact-form textarea { min-height: 130px; resize: vertical; }
form.contact-form .submit-row { margin-top: 18px; }

/* Responsive */
@media (max-width: 920px) {
  .hero-grid, .two-col, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .strip-grid { grid-template-columns: repeat(2, 1fr); }
  .svc-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-points { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  section { padding: 60px 0; }
  .hero { padding: 60px 0 70px; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--paper);
    padding: 18px 24px;
    gap: 14px;
    border-bottom: 1px solid var(--line);
  }
  .hamburger { display: block; }
  .cards { grid-template-columns: 1fr; }
  .strip-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 36px 24px; }
}