/*
 Theme Name:   cptel4a
 Theme URI:    http://cptel4a.in
 Description:  Standalone WordPress theme for cptel4a.in — Process Engineering Solutions. Zero plugin dependencies.
 Author:       SASWAT
 Author URI:   http://cptel4a.in
 Version:      1.0.0
 License:      GNU General Public License v2 or later
 Text Domain:  cptel4a
 Requires at least: 6.0
 Tested up to: 6.5
 Requires PHP: 7.4
*/

/* ============================================
   1. RESET & VARIABLES
   ============================================ */
:root {
  --cp-primary: #0073e6;
  --cp-primary-dark: #005bb5;
  --cp-accent: #00bfff;
  --cp-dark: #1a1a2e;
  --cp-dark2: #16213e;
  --cp-text: #333;
  --cp-text-light: #666;
  --cp-bg: #f8f9fa;
  --cp-white: #fff;
  --cp-border: #e0e0e0;
  --cp-green: #28a745;
  --cp-red: #dc3545;
  --cp-radius: 8px;
  --cp-shadow: 0 2px 12px rgba(0,0,0,.08);
  --cp-shadow-hover: 0 6px 24px rgba(0,0,0,.12);
  --cp-ease: all .3s ease;
  --cp-font: 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --cp-max: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--cp-font);
  color: var(--cp-text);
  line-height: 1.7;
  background: var(--cp-white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--cp-primary); text-decoration: none; transition: var(--cp-ease); }
a:hover { color: var(--cp-primary-dark); }

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

/* ============================================
   2. HEADER & NAVIGATION
   ============================================ */
.site-header {
  background: var(--cp-white);
  border-bottom: 1px solid var(--cp-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-inner {
  max-width: var(--cp-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.site-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--cp-dark);
  letter-spacing: -0.5px;
}
.site-logo:hover { color: var(--cp-primary); }

/* Desktop nav */
.main-nav ul {
  list-style: none;
  display: flex;
  gap: 8px;
}
.main-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--cp-text);
  border-radius: 6px;
  transition: var(--cp-ease);
}
.main-nav a:hover,
.main-nav .current-menu-item a,
.main-nav .current_page_item a {
  background: var(--cp-bg);
  color: var(--cp-primary);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--cp-dark);
  margin: 5px 0;
  transition: var(--cp-ease);
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--cp-white);
    border-bottom: 1px solid var(--cp-border);
    box-shadow: var(--cp-shadow);
    padding: 16px;
  }
  .main-nav.active { display: block; }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav a { padding: 12px 16px; }
}

/* ============================================
   3. HERO SECTION
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--cp-dark) 0%, var(--cp-dark2) 100%);
  color: var(--cp-white);
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,191,255,.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-label {
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cp-accent);
  margin-bottom: 16px;
  font-weight: 500;
}
.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 16px;
}
.hero h3 {
  color: #b0b0b0;
  font-weight: 400;
  font-size: 18px;
  max-width: 700px;
  margin-bottom: 20px;
}
.hero p { color: #ccc; max-width: 650px; }

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,.1);
}
.hero-stat {
  text-align: center;
}
.hero-stat .num {
  font-size: 36px;
  font-weight: 700;
  color: var(--cp-accent);
  display: block;
}
.hero-stat .label {
  font-size: 14px;
  color: #999;
}

/* ============================================
   4. BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--cp-ease);
  text-align: center;
}
.btn-primary {
  background: var(--cp-primary);
  color: var(--cp-white);
}
.btn-primary:hover {
  background: var(--cp-primary-dark);
  color: var(--cp-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,115,230,.3);
}
.btn-outline {
  background: transparent;
  color: var(--cp-white);
  border: 2px solid rgba(255,255,255,.3);
}
.btn-outline:hover {
  border-color: var(--cp-white);
  color: var(--cp-white);
}

/* ============================================
   5. SECTIONS
   ============================================ */
.section {
  padding: 80px 0;
}
.section-alt {
  background: var(--cp-bg);
}
.section-dark {
  background: var(--cp-dark);
  color: var(--cp-white);
}
.section-label {
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cp-primary);
  font-weight: 600;
  margin-bottom: 8px;
}
.section-title {
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--cp-dark);
}
.section-dark .section-title { color: var(--cp-white); }
.section-dark .section-label { color: var(--cp-accent); }
.section-subtitle {
  color: var(--cp-text-light);
  max-width: 600px;
  margin-bottom: 40px;
}
.text-center { text-align: center; }
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* ============================================
   6. CARDS GRID
   ============================================ */
.cards { display: grid; gap: 24px; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 992px) {
  .cards-3, .cards-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .cards-2, .cards-3, .cards-4 { grid-template-columns: 1fr; }
}

/* Service cards */
.card {
  background: var(--cp-white);
  border: 1px solid var(--cp-border);
  border-radius: var(--cp-radius);
  padding: 32px 24px;
  transition: var(--cp-ease);
}
.card:hover {
  box-shadow: var(--cp-shadow-hover);
  transform: translateY(-4px);
}
.card-num {
  font-size: 48px;
  font-weight: 700;
  color: var(--cp-accent);
  opacity: .25;
  line-height: 1;
  margin-bottom: 12px;
}
.card h3 { font-size: 20px; margin-bottom: 10px; color: var(--cp-dark); }
.card p { color: var(--cp-text-light); font-size: 15px; margin-bottom: 16px; }
.card-link { font-weight: 600; font-size: 14px; }

/* Expertise cards */
.exp-card {
  background: var(--cp-white);
  border-radius: var(--cp-radius);
  padding: 24px;
  box-shadow: var(--cp-shadow);
  border-left: 4px solid var(--cp-primary);
  transition: var(--cp-ease);
}
.exp-card:hover { box-shadow: var(--cp-shadow-hover); }
.exp-card h4 { margin-bottom: 8px; color: var(--cp-dark); font-size: 17px; }
.exp-card p { color: var(--cp-text-light); font-size: 14px; }

/* ============================================
   7. STEP CARDS
   ============================================ */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 768px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .steps { grid-template-columns: 1fr; } }

.step { text-align: center; padding: 20px; }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--cp-primary);
  color: var(--cp-white);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
}
.step h4 { margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--cp-text-light); }

/* ============================================
   8. PRODUCT CARDS
   ============================================ */
.product-card {
  background: var(--cp-white);
  border: 1px solid var(--cp-border);
  border-radius: var(--cp-radius);
  padding: 24px;
  transition: var(--cp-ease);
}
.product-card:hover {
  box-shadow: var(--cp-shadow-hover);
  transform: translateY(-3px);
}
.product-badges { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .5px;
  text-transform: uppercase;
  color: var(--cp-white);
}
.badge-excel     { background: #1d6f42; }
.badge-bestseller{ background: #ff9800; }
.badge-new       { background: var(--cp-primary); }
.badge-popular   { background: #9c27b0; }

.product-cat {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--cp-text-light);
  margin-bottom: 6px;
}
.product-card h3 { font-size: 17px; margin-bottom: 10px; }
.product-card > p { font-size: 14px; color: var(--cp-text-light); }

.product-tags { display: flex; gap: 6px; flex-wrap: wrap; margin: 12px 0; }
.product-tags span {
  background: var(--cp-bg);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  color: var(--cp-text-light);
}
.product-price {
  font-size: 22px;
  font-weight: 700;
  color: var(--cp-dark);
  margin-top: 8px;
}

/* ============================================
   9. SPECIALIZATION TAGS
   ============================================ */
.spec-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.spec-tag {
  background: rgba(0,115,230,.1);
  color: var(--cp-primary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
}

/* ============================================
   10. FORMS
   ============================================ */
.form-wrap {
  max-width: 700px;
  margin: 0 auto;
  background: var(--cp-white);
  border-radius: var(--cp-radius);
  padding: 40px;
  box-shadow: var(--cp-shadow);
}
.section-alt .form-wrap { box-shadow: none; border: 1px solid var(--cp-border); }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}
.form-group .req { color: var(--cp-red); }

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--cp-border);
  border-radius: 6px;
  font-size: 15px;
  font-family: var(--cp-font);
  background: #fafbfc;
  transition: var(--cp-ease);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--cp-primary);
  box-shadow: 0 0 0 3px rgba(0,115,230,.15);
}

.checkbox-group { display: flex; flex-direction: column; gap: 10px; margin-top: 6px; }
.checkbox-group label {
  font-weight: 400;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.form-submit {
  display: block;
  width: 100%;
  background: var(--cp-primary);
  color: var(--cp-white);
  padding: 14px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--cp-ease);
}
.form-submit:hover {
  background: var(--cp-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,115,230,.3);
}
.form-note {
  text-align: center;
  font-size: 13px;
  color: var(--cp-text-light);
  margin-top: 12px;
}
.form-success {
  background: #d4edda;
  color: #155724;
  padding: 16px;
  border-radius: 6px;
  text-align: center;
  margin-bottom: 20px;
}

/* ============================================
   11. FAQ ACCORDION
   ============================================ */
.faq-list { max-width: 700px; margin: 0 auto; }
.faq-item {
  background: var(--cp-white);
  border: 1px solid var(--cp-border);
  border-radius: var(--cp-radius);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-item summary {
  padding: 18px 50px 18px 24px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--cp-primary);
  font-weight: 300;
}
.faq-item[open] summary::after { content: '\2212'; }
.faq-item .faq-body { padding: 0 24px 18px; color: var(--cp-text-light); }

/* ============================================
   12. WHAT WE BUY / DON'T BUY
   ============================================ */
.quality-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 600px) { .quality-grid { grid-template-columns: 1fr; } }

.quality-yes {
  background: #f0faf0;
  padding: 28px;
  border-radius: var(--cp-radius);
  border-left: 4px solid var(--cp-green);
}
.quality-no {
  background: #fef0f0;
  padding: 28px;
  border-radius: var(--cp-radius);
  border-left: 4px solid var(--cp-red);
}
.quality-yes h4, .quality-no h4 { margin-bottom: 12px; }
.quality-yes ul, .quality-no ul { list-style: none; padding: 0; }
.quality-yes li, .quality-no li { padding: 6px 0; font-size: 14px; color: var(--cp-text-light); }
.quality-yes li::before { content: '\2192 '; color: var(--cp-green); font-weight: 700; }
.quality-no  li::before { content: '\2192 '; color: var(--cp-red); font-weight: 700; }

/* Doc requirement cards */
.doc-card {
  background: var(--cp-white);
  padding: 24px;
  border-radius: var(--cp-radius);
  box-shadow: var(--cp-shadow);
  text-align: center;
}
.doc-card h4 { margin-bottom: 8px; }
.doc-card p { font-size: 14px; color: var(--cp-text-light); }

/* ============================================
   13. BLOG
   ============================================ */
.page-header {
  background: var(--cp-bg);
  padding: 60px 0 40px;
}
.page-header .section-label { margin-bottom: 8px; }
.page-header h1 { font-size: clamp(32px, 4vw, 48px); font-weight: 700; color: var(--cp-dark); }
.page-header p { color: var(--cp-text-light); max-width: 600px; margin-top: 8px; }

.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 30px; }
.post-card {
  background: var(--cp-white);
  border: 1px solid var(--cp-border);
  border-radius: var(--cp-radius);
  overflow: hidden;
  transition: var(--cp-ease);
}
.post-card:hover { box-shadow: var(--cp-shadow-hover); transform: translateY(-3px); }
.post-card-body { padding: 24px; }
.post-card .cat-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--cp-primary);
  font-weight: 600;
}
.post-card h2 { font-size: 20px; margin: 8px 0 12px; }
.post-card h2 a { color: var(--cp-dark); }
.post-card h2 a:hover { color: var(--cp-primary); }
.post-card .excerpt { font-size: 14px; color: var(--cp-text-light); margin-bottom: 16px; }
.post-card .meta { font-size: 13px; color: #999; }

.single-post-content { max-width: 760px; margin: 0 auto; padding: 60px 24px; }
.single-post-content h1 { font-size: 36px; margin-bottom: 16px; }
.single-post-content .post-meta { color: #999; margin-bottom: 30px; font-size: 14px; }
.single-post-content .entry-content { font-size: 17px; line-height: 1.8; }
.single-post-content .entry-content h2 { margin: 40px 0 16px; }
.single-post-content .entry-content p { margin-bottom: 20px; }

/* ============================================
   14. CTA SECTION
   ============================================ */
.cta {
  background: var(--cp-dark);
  color: var(--cp-white);
  text-align: center;
  padding: 80px 0;
}
.cta .section-label { color: var(--cp-accent); }
.cta h2 { color: var(--cp-white); font-size: 32px; margin-bottom: 24px; }

/* ============================================
   15. FOOTER
   ============================================ */
.site-footer {
  background: var(--cp-dark);
  color: #888;
  padding: 40px 0;
  text-align: center;
  font-size: 14px;
  border-top: 1px solid rgba(255,255,255,.05);
}
.site-footer a { color: #aaa; }
.site-footer a:hover { color: var(--cp-white); }

/* ============================================
   16. 404
   ============================================ */
.page-404 {
  text-align: center;
  padding: 120px 24px;
}
.page-404 h1 { font-size: 72px; color: var(--cp-accent); margin-bottom: 16px; }
.page-404 p { font-size: 18px; color: var(--cp-text-light); margin-bottom: 24px; }

/* ============================================
   17. SCROLL TO TOP
   ============================================ */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--cp-primary);
  color: var(--cp-white);
  border: none;
  cursor: pointer;
  font-size: 20px;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--cp-shadow);
  transition: var(--cp-ease);
  z-index: 999;
}
.scroll-top.visible { display: flex; }
.scroll-top:hover { background: var(--cp-primary-dark); transform: translateY(-3px); }