/* ============================================================
   SITE FEASIBILITY STUDIES — STYLESHEET
   ============================================================

   TABLE OF CONTENTS
   -----------------
   1.  CSS Variables (colors, sizes)
   2.  Reset & Base
   3.  Typography
   4.  Layout Utilities
   5.  Navigation
   6.  Hero
   7.  Intro Strip
   8.  Studies Grid
   9.  Package Section
   10. VR Hardware Section
   11. Process / How It Works
   12. Who We Serve
   13. Contact Form
   14. Footer
   15. Responsive Overrides

   To change the color scheme, edit the :root variables in
   section 1. All colors throughout the site reference these.
   ============================================================ */


/* ── 1. CSS Variables ─────────────────────────────────────── */
:root {
  /* Brand colors */
  --navy:      #1b2b3a;   /* primary dark — nav, hero, dark sections */
  --navy-mid:  #243447;   /* mobile nav dropdown background */
  --green:     #2c6e4f;   /* accent — buttons, borders, arrows */
  --green-lt:  #3a8f66;   /* hover state for green */
  --tan:       #c8b89a;   /* warm accent — logo span, dark-section labels */
  --cream:     #f5f1eb;   /* light warm background & dark-section text */
  --offwhite:  #faf8f5;   /* page body background */

  /* Text */
  --text:      #1e2d3a;   /* primary body text */
  --text-mid:  #4a5d6b;   /* secondary / paragraph text */
  --text-lt:   #7a8f9e;   /* labels, captions, light text */
  --rule:      #ddd8d0;   /* dividers and borders */

  /* Study card image placeholder colors (swap for real photos later) */
  --ph1: #2c4a3e;   /* Study 01 — Site Documentation */
  --ph2: #1e3a5c;   /* Study 02 — LiDAR Scan */
  --ph3: #3d3228;   /* Study 03 — Acoustic */
  --ph4: #4a3520;   /* Study 04 — Thermal & Solar */
  --ph5: #1e3a4a;   /* Study 05 — 3D Model */
  --ph6: #2e2c42;   /* Study 06 — Concept Design */
  --ph7: #1a3020;   /* Study 07 — Drone Photography */
  --ph8: #2a1e40;   /* Study 08 — Photogrammetry */
  --ph9: #1a2840;   /* Study 09 — VR Simulation */

  /* Layout */
  --max: 1100px;    /* maximum content width */
  --gap: 2rem;
}


/* ── 2. Reset & Base ──────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Georgia', serif;
  background: var(--offwhite);
  color: var(--text);
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}


/* ── 3. Typography ────────────────────────────────────────── */

/* Eyebrow label — small caps above headings */
.label {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.15;
  font-weight: normal;
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: normal;
  line-height: 1.2;
}

h3 {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

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


/* ── 4. Layout Utilities ──────────────────────────────────── */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

/* Dark section (navy background) */
.section--dark {
  background: var(--navy);
  color: var(--cream);
}

.section--dark p        { color: #9db4c4; }
.section--dark .label   { color: var(--tan); }
.section--dark h2       { color: var(--cream); }

/* Cream section */
.section--cream {
  background: var(--cream);
}

/* Shared button base */
.btn {
  display: inline-block;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.9rem 2rem;
  border-radius: 2px;
  transition: background 0.2s, color 0.2s;
}

.btn-primary {
  background: var(--green);
  color: #fff;
}

.btn-primary:hover { background: var(--green-lt); }

.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.3);
  color: var(--cream);
  margin-left: 1rem;
}

.btn-outline:hover {
  border-color: var(--cream);
  background: rgba(255,255,255,0.05);
}


/* ── 5. Navigation ────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cream);
}

.nav-logo span {
  color: var(--tan);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #9db4c4;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--cream); }

/* Mobile hamburger button — hidden on desktop */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--cream);
  transition: all 0.2s;
}


/* ── 6. Hero ──────────────────────────────────────────────── */
.hero {
  background: var(--navy);
  padding: 0;
}

/* Replace this block's background with your hero photo */
.hero-image-placeholder {
  width: 100%;
  height: 420px;
  background: linear-gradient(160deg, #1a3a2e 0%, #0f2233 60%, #1b2b3a 100%);
  display: flex;
  align-items: flex-end;
  padding: 2.5rem 1.5rem;
}

.hero-image-placeholder .ph-label {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
}

.hero-content {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}

.hero-content .label { margin-bottom: 1.25rem; }

.hero-content h1 {
  color: var(--cream);
  max-width: 700px;
  margin-bottom: 1.5rem;
}

.hero-content p {
  color: #9db4c4;
  font-size: 1.1rem;
  max-width: 580px;
  margin-bottom: 2.5rem;
}


/* ── 7. Intro Strip ───────────────────────────────────────── */
.intro {
  padding: 4rem 0;
  border-bottom: 1px solid var(--rule);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.intro-grid h2 { margin-top: 0.75rem; }
.intro-grid p  { margin-top: 1rem; font-size: 1.05rem; }

.intro-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.stat {
  padding: 1.5rem;
  background: var(--cream);
  border-left: 3px solid var(--green);
}

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

.stat-label {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.78rem;
  color: var(--text-lt);
  margin-top: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}


/* ── 8. Studies Grid ──────────────────────────────────────── */
.studies-header {
  text-align: center;
  margin-bottom: 3rem;
}

.studies-header h2 { margin-top: 0.75rem; }

.studies-header p {
  margin-top: 1rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.05rem;
}

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

.study-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s;
}

.study-card:hover {
  box-shadow: 0 6px 24px rgba(27,43,58,0.1);
}

/* Replace background-color with a real background-image when ready */
.study-card-image {
  height: 180px;
  display: flex;
  align-items: flex-end;
  padding: 1rem;
}

.study-card-image .ph-label {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.2);
}

.study-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.study-number {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-lt);
  margin-bottom: 0.5rem;
}

.study-card h3 {
  font-size: 1.05rem;
  color: var(--navy);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.study-card p {
  font-size: 0.92rem;
  line-height: 1.65;
  flex: 1;
}

.study-deliverables {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}

.study-deliverables .dlabel {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-lt);
  margin-bottom: 0.5rem;
}

.study-deliverables ul {
  list-style: none;
  padding: 0;
}

.study-deliverables ul li {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.82rem;
  color: var(--text-mid);
  padding: 0.2rem 0 0.2rem 1rem;
  position: relative;
}

.study-deliverables ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--green);
  font-size: 0.75rem;
}


/* ── 9. Package Section ───────────────────────────────────── */
.package-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

/* Replace background with a real image */
.package-image {
  height: 360px;
  background: linear-gradient(135deg, #152a1e 0%, #0f1f2e 100%);
  border-radius: 2px;
  display: flex;
  align-items: flex-end;
  padding: 1.25rem;
}

.package-image .ph-label {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.2);
}

.package-text .label { margin-bottom: 0.75rem; }
.package-text h2     { margin-bottom: 1rem; }
.package-text p      { margin-bottom: 1.25rem; font-size: 1.05rem; }

.package-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 2rem;
}

.package-list li {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.9rem;
  color: var(--text-mid);
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.package-list li::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
}


/* ── 10. VR Hardware Section ──────────────────────────────── */
.vr-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.vr-device-row {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 2px;
  background: rgba(255,255,255,0.03);
  transition: background 0.2s;
}

.vr-device-row:hover {
  background: rgba(255,255,255,0.07);
}

/* Colored dot to the left of each device listing */
.vr-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 5px;
}

.vr-name {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--cream);
  margin-bottom: 0.3rem;
}

.vr-desc {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.8rem;
  line-height: 1.55;
  color: #7a9db4;
}


/* ── 11. Process / How It Works ───────────────────────────── */
.process-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.process-header h2 { margin-top: 0.75rem; }

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

/* Horizontal rule connecting the numbered dots */
.process-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 28px);
  right: calc(12.5% + 28px);
  height: 1px;
  background: var(--rule);
}

.process-step {
  text-align: center;
  padding: 0 1rem;
  position: relative;
}

.step-dot {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 auto 1.25rem;
  position: relative;
  z-index: 1;
}

.process-step h3 {
  font-size: 0.9rem;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.process-step p {
  font-size: 0.85rem;
  line-height: 1.6;
}


/* ── 12. Who We Serve ─────────────────────────────────────── */
.clients-header {
  text-align: center;
  margin-bottom: 1rem;
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.client-card {
  padding: 2rem;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  border-radius: 2px;
}

.client-card h3 {
  color: var(--cream);
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.client-card p {
  font-size: 0.9rem;
  line-height: 1.65;
}


/* ── 13. Contact Form ─────────────────────────────────────── */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact-text h2 { margin-top: 0.75rem; margin-bottom: 1rem; }
.contact-text p  { font-size: 1.05rem; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-lt);
}

.form-group input,
.form-group textarea,
.form-group select {
  border: 1px solid var(--rule);
  background: #fff;
  padding: 0.75rem 1rem;
  font-family: 'Georgia', serif;
  font-size: 0.95rem;
  color: var(--text);
  border-radius: 2px;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}

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

.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select   { appearance: none; cursor: pointer; }

.btn-form {
  background: var(--green);
  color: #fff;
  border: none;
  padding: 1rem 2rem;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.2s;
  align-self: flex-start;
}

.btn-form:hover { background: var(--green-lt); }


/* ── 14. Footer ───────────────────────────────────────────── */
footer {
  background: #0f1c28;
  padding: 2.5rem 0;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #4a6a80;
}

.footer-copy {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 0.75rem;
  color: #3a5566;
}


/* ── 15. Responsive Overrides ─────────────────────────────── */

/* Tablet and below */
@media (max-width: 900px) {
  .studies-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .intro-grid      { grid-template-columns: 1fr; }
  .package-inner   { grid-template-columns: 1fr; }
  .vr-columns      { grid-template-columns: 1fr; }
  .clients-grid    { grid-template-columns: 1fr; }
  .contact-inner   { grid-template-columns: 1fr; gap: 3rem; }

  .process-steps {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .process-steps::before { display: none; }
}

/* Mobile */
@media (max-width: 680px) {
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--navy-mid);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }

  .nav-links.open { display: flex; }

  .nav-links li a {
    display: block;
    padding: 0.75rem 1.5rem;
  }
}

@media (max-width: 560px) {
  .studies-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .process-steps { grid-template-columns: 1fr; }
}