/* ===== Melanu Technologies — Global Styles ===== */
:root {
  --green-900: #0a3d2e;
  --green-700: #14644a;
  --green-500: #1f8a66;
  --green-400: #2ea87f;
  --green-100: #e6f4ee;
  --green-50: #f3faf7;
  --ink-900: #0d1b16;
  --ink-700: #2a3b34;
  --ink-500: #5a6b65;
  --ink-300: #9aa8a3;
  --ink-100: #e3e9e6;
  --white: #ffffff;
  --bg: #fafbfa;
  --accent: #f59e0b;
  --shadow-sm: 0 1px 3px rgba(13,27,22,0.06);
  --shadow-md: 0 4px 16px rgba(13,27,22,0.08);
  --shadow-lg: 0 12px 40px rgba(13,27,22,0.12);
  --radius: 12px;
  --max: 1200px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-700);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1rem; color: var(--ink-700); }

a { color: var(--green-700); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--green-500); }

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

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== Navigation ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--ink-100);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.logo img {
  height: 44px;
  width: 44px;
}

.logo-text {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--ink-900);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.logo-text span {
  display: block;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--green-700);
  letter-spacing: 0.12em;
  margin-top: 2px;
}

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

.nav-links a {
  color: var(--ink-700);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--green-700);
}

.nav-cta {
  background: var(--green-700);
  color: var(--white) !important;
  padding: 0.55rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--green-900);
  color: var(--white) !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink-900);
  margin: 5px 0;
  transition: 0.3s;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: all 0.25s;
  font-family: inherit;
}

.btn-primary {
  background: var(--green-700);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--green-900);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: var(--green-700);
  border: 2px solid var(--green-700);
}

.btn-outline:hover {
  background: var(--green-700);
  color: var(--white);
}

/* ===== Hero ===== */
.hero {
  background:
    radial-gradient(circle at 20% 0%, var(--green-100) 0%, transparent 50%),
    radial-gradient(circle at 80% 100%, var(--green-50) 0%, transparent 50%),
    var(--white);
  padding: 5rem 0 6rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}

.hero-eyebrow {
  display: inline-block;
  background: var(--green-100);
  color: var(--green-900);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.hero h1 {
  margin-bottom: 1.25rem;
}

.hero h1 .accent {
  color: var(--green-700);
  position: relative;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--ink-500);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ink-100);
}

.stat-num {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--green-700);
  display: block;
  line-height: 1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--ink-500);
  margin-top: 0.25rem;
}

.hero-visual {
  position: relative;
}

.hero-card {
  background: var(--white);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--ink-100);
}

.hero-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.hero-mini {
  background: var(--green-50);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
  border: 1px solid var(--green-100);
}

.hero-mini-icon {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.hero-mini-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-900);
}

/* ===== Sections ===== */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--white);
}

.section-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
}

.section-eyebrow {
  display: inline-block;
  color: var(--green-700);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-head p {
  font-size: 1.05rem;
  color: var(--ink-500);
}

/* ===== Sectors / Cards Grid ===== */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: all 0.3s;
  position: relative;
}

.card:hover {
  border-color: var(--green-400);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--green-100);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.95rem;
  color: var(--ink-500);
  margin-bottom: 0;
}

/* ===== Product Cards ===== */
.product-card {
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s;
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.product-header {
  background: linear-gradient(135deg, var(--green-700), var(--green-500));
  color: var(--white);
  padding: 1.25rem 1.5rem;
}

.product-header h3 {
  color: var(--white);
  margin: 0;
  font-size: 1.15rem;
}

.product-body {
  padding: 1.5rem;
}

.product-list {
  list-style: none;
}

.product-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--ink-100);
  font-size: 0.92rem;
  color: var(--ink-700);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.product-list li:last-child { border: none; }

.product-list li::before {
  content: '✓';
  color: var(--green-500);
  font-weight: 700;
}

/* ===== Contact Form ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.contact-info-card {
  background: var(--green-900);
  color: var(--white);
  border-radius: var(--radius);
  padding: 2.5rem;
  position: sticky;
  top: 90px;
}

.contact-info-card h3 {
  color: var(--white);
  margin-bottom: 1.5rem;
}

.contact-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.contact-icon {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.1rem;
}

.contact-item-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 0.2rem;
}

.contact-item a, .contact-item-value {
  color: var(--white);
  font-weight: 500;
  font-size: 0.95rem;
  display: block;
}

.contact-item a:hover { color: var(--green-400); }

.form-card {
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
}

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

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-700);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--ink-100);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--ink-900);
  background: var(--white);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--green-500);
  box-shadow: 0 0 0 3px var(--green-100);
}

.form-group textarea {
  resize: vertical;
  min-height: 110px;
}

.form-msg {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  display: none;
}

.form-msg.success {
  background: var(--green-100);
  color: var(--green-900);
  display: block;
}

.form-msg.error {
  background: #fee2e2;
  color: #991b1b;
  display: block;
}

/* ===== Floating contact buttons ===== */
.floating-contacts {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 99;
}

.float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.4rem;
  box-shadow: var(--shadow-lg);
  transition: transform 0.2s;
  border: none;
  cursor: pointer;
  text-decoration: none;
}

.float-btn:hover { transform: scale(1.1); color: var(--white); }

.float-whatsapp { background: #25D366; }
.float-call { background: var(--green-700); }
.float-bot { background: var(--ink-900); }

/* ===== AI Chat Bot ===== */
.chatbot {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 360px;
  max-width: calc(100vw - 3rem);
  height: 480px;
  background: var(--white);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  display: none;
  flex-direction: column;
  z-index: 200;
  overflow: hidden;
  border: 1px solid var(--ink-100);
}

.chatbot.open { display: flex; }

.chatbot-head {
  background: var(--green-900);
  color: var(--white);
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chatbot-head h4 { color: var(--white); margin: 0; font-size: 1rem; }
.chatbot-head small { font-size: 0.75rem; color: rgba(255,255,255,0.7); }

.chatbot-close {
  background: rgba(255,255,255,0.15);
  border: none;
  color: var(--white);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
}

.chatbot-body {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  background: var(--green-50);
}

.chat-msg {
  margin-bottom: 0.75rem;
  display: flex;
}

.chat-msg.bot .bubble {
  background: var(--white);
  color: var(--ink-700);
  border-radius: 14px 14px 14px 4px;
}

.chat-msg.user {
  justify-content: flex-end;
}

.chat-msg.user .bubble {
  background: var(--green-700);
  color: var(--white);
  border-radius: 14px 14px 4px 14px;
}

.bubble {
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
  max-width: 85%;
  line-height: 1.4;
}

.chat-quick {
  padding: 0.5rem 1rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  background: var(--white);
  border-top: 1px solid var(--ink-100);
}

.chat-quick button {
  background: var(--green-100);
  color: var(--green-900);
  border: none;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-size: 0.8rem;
  cursor: pointer;
  font-family: inherit;
}

.chat-quick button:hover { background: var(--green-400); color: var(--white); }

/* ===== Footer ===== */
footer {
  background: var(--ink-900);
  color: rgba(255,255,255,0.7);
  padding: 3.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

footer h4 {
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

footer ul { list-style: none; }
footer li { margin-bottom: 0.5rem; }
footer a { color: rgba(255,255,255,0.7); font-size: 0.9rem; }
footer a:hover { color: var(--green-400); }

.footer-brand p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  margin-top: 1rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

/* ===== Page header (for inner pages) ===== */
.page-header {
  background: linear-gradient(135deg, var(--green-900), var(--green-700));
  color: var(--white);
  padding: 4rem 0 3rem;
  text-align: center;
}

.page-header h1 { color: var(--white); margin-bottom: 0.5rem; }
.page-header p { color: rgba(255,255,255,0.85); font-size: 1.1rem; }

.breadcrumb {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 1rem;
}

.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: var(--white); }

/* ===== Animations ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-up {
  animation: fadeUp 0.6s ease forwards;
}

/* ===== Responsive ===== */
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-info-card { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--ink-100);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .form-row { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; gap: 1.5rem; }
}

@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .section { padding: 3.5rem 0; }
  .hero { padding: 3rem 0 4rem; }
  .form-card { padding: 1.5rem; }
  .contact-info-card { padding: 1.75rem; }
}