/* =============================================
   Innostruc Engineering - styles
   Palette: white / black / lime-green (~#7CB342)
   ============================================= */

:root {
  --green: #7CB342;
  --green-dark: #558B2F;
  --green-light: #a4d374;
  --black: #111;
  --gray-100: #f7f7f7;
  --gray-200: #ececec;
  --gray-500: #888;
  --shadow: 0 4px 14px rgba(0,0,0,0.08);
  --max-width: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Helvetica Neue", Arial, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--black);
  background: #fff;
}

a { color: var(--green-dark); text-decoration: none; }
a:hover { color: var(--green); }

img { max-width: 100%; height: auto; display: block; }

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

/* ---------- GREEN STRIPS (decorative side accents) ---------- */
.green-strip {
  display: block;
  background: linear-gradient(135deg, var(--green) 0%, var(--green-light) 100%);
  position: absolute;
  z-index: 1;
}
.hero .green-strip.top-right {
  top: 80px; right: 0;
  width: 320px; height: 4px;
}
.hero .green-strip.bottom-left {
  bottom: 0; left: 0;
  width: 60%; height: 6px;
}
.projects .green-strip.right-edge,
.contact .green-strip.right-edge {
  top: 0; right: 0;
  width: 220px; height: 100%;
  clip-path: polygon(60% 0, 100% 0, 100% 100%, 0 100%, 30% 60%);
  opacity: 0.18;
  pointer-events: none;
}

/* ---------- HEADER / NAV ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 100;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--black);
}
.brand-mark img {
  height: 76px;
  width: auto;
}
.primary-nav {
  display: flex;
  gap: 28px;
}
.primary-nav a {
  color: var(--black);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
  transition: color 0.2s;
}
.primary-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--green);
  transition: width 0.25s;
}
.primary-nav a:hover { color: var(--green-dark); }
.primary-nav a:hover::after { width: 100%; }

@media (max-width: 720px) {
  .primary-nav { gap: 14px; flex-wrap: wrap; justify-content: flex-end; }
  .primary-nav a { font-size: 0.85rem; }
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 60px 24px 100px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
}
.hero-text { z-index: 2; }
.hero-text h1 {
  font-size: clamp(1.2rem, 2.2vw, 1.8rem);
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  white-space: nowrap;
}
.hero-text .tagline {
  font-size: 1.15rem;
  color: var(--green-dark);
  font-weight: 600;
  margin-bottom: 22px;
}
.hero-text .lead {
  font-size: 1.05rem;
  color: #333;
  margin-bottom: 30px;
  max-width: 540px;
}
.hero-image {
  z-index: 2;
}
.hero-image img {
  width: 100%;
  height: 380px;
  object-fit: contain;
}

@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; padding: 40px 24px 80px; }
  .hero-image img { height: 260px; }
}

/* ---------- BUTTONS ---------- */
.btn-primary, .btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  font-weight: 600;
  border-radius: 4px;
  transition: all 0.2s;
  border: 2px solid transparent;
  cursor: pointer;
  text-align: center;
}
.btn-primary {
  background: var(--green);
  color: #fff;
}
.btn-primary:hover {
  background: var(--green-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(124,179,66,0.4);
}
.btn-secondary {
  background: transparent;
  border-color: var(--green);
  color: var(--green-dark);
  margin-left: 10px;
}
.btn-secondary:hover {
  background: var(--green);
  color: #fff;
}

/* ---------- ABOUT ---------- */
.about {
  background: var(--gray-100);
  padding: 70px 0;
}
.about h2 {
  font-size: 2rem;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 12px;
}
.about h2::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 60px; height: 4px;
  background: var(--green);
}
.about p { margin-bottom: 16px; color: #333; }

/* ---------- SERVICES / VALUES ---------- */
.services { padding: 70px 0; }
.services h2 {
  font-size: 2rem;
  margin-bottom: 40px;
  text-align: center;
}
.services h2::after {
  content: '';
  display: block;
  width: 60px; height: 4px;
  background: var(--green);
  margin: 12px auto 0;
}
.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.value-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-top: 4px solid var(--green);
  padding: 28px 22px;
  border-radius: 4px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.value-icon {
  font-size: 2rem;
  color: var(--green);
  margin-bottom: 12px;
}
.value-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--black);
}
.value-card p {
  color: var(--gray-500);
  font-size: 0.95rem;
}

/* ---------- PROJECTS ---------- */
.projects {
  position: relative;
  overflow: hidden;
  background: #fff;
  padding: 70px 0 90px;
}
.projects .container { position: relative; z-index: 2; }
.project-section { margin-bottom: 60px; }
.project-section h2 {
  font-size: 1.75rem;
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 5px solid var(--green);
  line-height: 1.2;
}
.photo-grid {
  display: grid;
  gap: 14px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.photo-grid img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 3px;
  cursor: pointer;
  transition: transform 0.25s, box-shadow 0.25s;
}
.photo-grid img:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow);
}

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .photo-grid img { height: 240px; }
}

/* ---------- REFERENCES TABLE ---------- */
.references {
  background: var(--gray-100);
  padding: 70px 0;
}
.references h2 {
  font-size: 2rem;
  margin-bottom: 30px;
  text-align: center;
  position: relative;
  padding-bottom: 12px;
}
.references h2::after {
  content: '';
  display: block;
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 60px; height: 4px;
  background: var(--green);
}
.ref-table-wrap { overflow-x: auto; }
.ref-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  box-shadow: var(--shadow);
  border-radius: 4px;
  overflow: hidden;
}
.ref-table th {
  background: var(--green);
  color: #fff;
  text-align: left;
  padding: 14px 18px;
  font-weight: 600;
  font-size: 0.95rem;
}
.ref-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--gray-200);
  font-size: 0.95rem;
}
.ref-table tr:nth-child(even) td { background: var(--gray-100); }
.ref-table tr:hover td { background: rgba(124,179,66,0.08); }

/* ---------- CONTACT ---------- */
.contact {
  position: relative;
  overflow: hidden;
  padding: 70px 0;
}
.contact .container { position: relative; z-index: 2; }
.contact h2 {
  font-size: 2rem;
  margin-bottom: 32px;
  position: relative;
  padding-bottom: 12px;
}
.contact h2::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 60px; height: 4px;
  background: var(--green);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: start;
}
.info-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  padding: 14px 0;
  border-bottom: 1px solid var(--gray-200);
}
.info-label {
  font-weight: 600;
  color: var(--green-dark);
}
.info-value { color: var(--black); }
.info-value a { color: var(--black); border-bottom: 1px dotted var(--green); }
.info-value a:hover { color: var(--green-dark); border-bottom-color: var(--green-dark); }

.contact-cta {
  background: var(--green);
  color: #fff;
  padding: 36px 28px;
  border-radius: 4px;
  text-align: center;
  box-shadow: var(--shadow);
}
.contact-cta p {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 22px;
}
.contact-cta .btn-primary {
  background: #fff;
  color: var(--green-dark);
}
.contact-cta .btn-primary:hover { background: var(--gray-100); }
.contact-cta .btn-secondary {
  border-color: #fff;
  color: #fff;
}
.contact-cta .btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

@media (max-width: 760px) {
  .contact-grid { grid-template-columns: 1fr; }
  .info-row { grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- MODAL ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal[hidden] { display: none; }
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.55);
  cursor: pointer;
  animation: fadeIn 0.18s ease-out;
}
.modal-dialog {
  position: relative;
  background: #fff;
  width: 100%;
  max-width: 480px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  border-radius: 6px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.25);
  padding: 32px 30px;
  animation: slideUp 0.22s ease-out;
}
.modal-close {
  position: absolute;
  top: 10px; right: 14px;
  background: transparent;
  border: none;
  font-size: 1.8rem;
  line-height: 1;
  color: var(--gray-500);
  cursor: pointer;
  padding: 4px 10px;
  transition: color 0.15s;
}
.modal-close:hover { color: var(--black); }
.modal-dialog h3 {
  font-size: 1.5rem;
  margin-bottom: 6px;
  color: var(--black);
}
.modal-sub {
  color: var(--gray-500);
  font-size: 0.92rem;
  margin-bottom: 22px;
}
.form-row { margin-bottom: 16px; }
.form-row label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--black);
  margin-bottom: 6px;
}
.form-row input,
.form-row textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--gray-200);
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--black);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
  box-sizing: border-box;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(124,179,66,0.18);
}
.form-row textarea { resize: vertical; min-height: 90px; }
.form-row input:invalid:not(:placeholder-shown),
.form-row textarea:invalid:not(:placeholder-shown) {
  border-color: #c62828;
}
.form-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 22px;
}
.form-status {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 4px;
  font-size: 0.9rem;
}
.form-status.success {
  background: rgba(124,179,66,0.12);
  color: var(--green-dark);
  border-left: 3px solid var(--green);
}
.form-status.error {
  background: rgba(198,40,40,0.08);
  color: #c62828;
  border-left: 3px solid #c62828;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (max-width: 520px) {
  .modal { padding: 12px; }
  .modal-dialog { padding: 26px 20px; }
}

/* ---------- FOOTER ---------- */
.site-footer {
  background: #111;
  color: #ccc;
  padding: 28px 0;
  text-align: center;
  font-size: 0.88rem;
}
.site-footer p { margin: 4px 0; }
.site-footer a { color: var(--green-light); }
.site-footer a:hover { color: #fff; }