/* ============================================
   Powershift Energy Co — Global Stylesheet
   Mobile-first · Vanilla CSS · No frameworks
   ============================================ */

/* --- Custom Properties --- */
:root {
  --navy: #0f172a;
  --amber: #f59e0b;
  --amber-hover: #d97706;
  --green: #10b981;
  --green-hover: #059669;
  --indigo: #6366f1;
  --indigo-hover: #4f46e5;
  --bg-light: #f8fafc;
  --text-body: #334155;
  --text-muted: #64748b;
  --white: #ffffff;
  --border: #e2e8f0;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,0.06);
  --shadow: 0 1px 3px rgba(15,23,42,0.1), 0 1px 2px rgba(15,23,42,0.06);
  --shadow-lg: 0 4px 6px rgba(15,23,42,0.07), 0 10px 15px rgba(15,23,42,0.1);
  --max-w: 1140px;
  --font: 'DM Sans', system-ui, -apple-system, sans-serif;
  /* Page accent — overridden per page */
  --accent: var(--amber);
  --accent-hover: var(--amber-hover);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-body);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}

/* --- Utility --- */
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }

/* --- Typography --- */
h1, h2, h3, h4 { color: var(--navy); line-height: 1.2; font-weight: 700; }
h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; margin-bottom: 0.5rem; }
h3 { font-size: 1.125rem; }
p + p { margin-top: 1rem; }

@media (min-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.875rem; }
  h3 { font-size: 1.25rem; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  border: none;
}
.btn:active { transform: scale(0.98); }

.btn-amber { background: var(--amber); color: var(--navy); }
.btn-amber:hover { background: var(--amber-hover); }
.btn-green { background: var(--green); color: var(--white); }
.btn-green:hover { background: var(--green-hover); }
.btn-indigo { background: var(--indigo); color: var(--white); }
.btn-indigo:hover { background: var(--indigo-hover); }
.btn-white { background: var(--white); color: var(--navy); }
.btn-white:hover { background: var(--bg-light); }
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.1); }

/* --- Header / Nav --- */
.site-header {
  background: var(--navy);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo span { color: var(--amber); }

/* Mobile menu toggle */
.nav-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-toggle i {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle.active i:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active i:nth-child(2) { opacity: 0; }
.nav-toggle.active i:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-links {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--navy);
  padding: 0 20px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.nav-links.open { display: block; }
.nav-links a {
  display: block;
  padding: 12px 0;
  color: rgba(255,255,255,0.8);
  font-size: 0.9375rem;
  font-weight: 500;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-phone {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--amber);
  font-weight: 600;
  font-size: 0.9375rem;
  margin-top: 12px;
}

@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .nav-links {
    display: flex !important;
    position: static;
    padding: 0;
    border: none;
    align-items: center;
    gap: 28px;
    background: none;
  }
  .nav-links a {
    display: inline;
    padding: 0;
    border: none;
  }
  .nav-phone { margin-top: 0; }
}

/* --- Hero --- */
.hero {
  background: var(--navy);
  padding: 48px 0 56px;
  color: var(--white);
}
.hero-grid {
  display: grid;
  gap: 40px;
}
.hero .badge {
  display: inline-block;
  background: rgba(255,255,255,0.1);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 16px;
}
.hero h1 { color: var(--white); margin-bottom: 16px; }
.hero p { color: rgba(255,255,255,0.75); font-size: 1.0625rem; max-width: 520px; }
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.hero-trust li {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.06);
  padding: 6px 12px;
  border-radius: 6px;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

@media (min-width: 768px) {
  .hero { padding: 64px 0 72px; }
  .hero-grid { grid-template-columns: 1fr 1fr; align-items: center; }
}

/* --- Form Card (in hero) --- */
.form-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-lg);
}
.form-card h2 { font-size: 1.25rem; color: var(--navy); margin-bottom: 4px; }
.form-card .form-sub { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 20px; }

.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 4px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--text-body);
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}
.form-group input.error,
.form-group select.error {
  border-color: #ef4444;
}
.form-error-msg {
  color: #ef4444;
  font-size: 0.75rem;
  margin-top: 2px;
  display: none;
}
.form-group.has-error .form-error-msg { display: block; }

.form-submit {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  margin-top: 4px;
  transition: background 0.2s, transform 0.1s;
}
.form-submit:active { transform: scale(0.98); }
.form-submit.amber { background: var(--amber); color: var(--navy); }
.form-submit.amber:hover { background: var(--amber-hover); }
.form-submit.green { background: var(--green); color: var(--white); }
.form-submit.green:hover { background: var(--green-hover); }
.form-submit.indigo { background: var(--indigo); color: var(--white); }
.form-submit.indigo:hover { background: var(--indigo-hover); }

.form-note {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.form-success {
  text-align: center;
  padding: 32px 16px;
}
.form-success .icon { font-size: 2.5rem; margin-bottom: 12px; }
.form-success h3 { margin-bottom: 8px; }
.form-success p { color: var(--text-muted); font-size: 0.9375rem; }

/* --- Sections --- */
section { padding: 56px 0; }
section.alt { background: var(--bg-light); }

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 40px;
}
.section-header p { color: var(--text-muted); margin-top: 8px; }

@media (min-width: 768px) {
  section { padding: 72px 0; }
}

/* --- Cards Grid --- */
.cards-grid {
  display: grid;
  gap: 20px;
}
.cards-grid.cols-2 { grid-template-columns: 1fr; }
.cards-grid.cols-3 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .cards-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
  .cards-grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .cards-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}

/* --- Service Card (homepage) --- */
.service-card {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow 0.2s, border-color 0.2s;
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.service-card .icon { font-size: 2rem; margin-bottom: 12px; }
.service-card h3 { margin-bottom: 6px; }
.service-card p { color: var(--text-muted); font-size: 0.9375rem; flex: 1; }
.service-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 16px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--accent);
  transition: gap 0.2s;
}
.service-card:hover .card-link { gap: 8px; }

/* --- Benefit Card --- */
.benefit-card {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  transition: box-shadow 0.2s;
}
.benefit-card:hover { box-shadow: var(--shadow); }
.benefit-card .icon { font-size: 1.5rem; margin-bottom: 10px; }
.benefit-card h3 { font-size: 1rem; margin-bottom: 4px; }
.benefit-card p { color: var(--text-muted); font-size: 0.875rem; }

/* --- Steps --- */
.steps {
  display: grid;
  gap: 24px;
  counter-reset: step;
}
.step {
  text-align: center;
  counter-increment: step;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--navy);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 12px;
}
.step-num.white-bg { background: rgba(255,255,255,0.15); color: var(--white); }
.step h3 { margin-bottom: 4px; }
.step p { color: var(--text-muted); font-size: 0.9375rem; max-width: 280px; margin: 0 auto; }

@media (min-width: 640px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
  .steps.cols-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .steps.cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* --- Trust Bar --- */
.trust-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px 24px;
  padding: 32px 0;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--navy);
}
.trust-item .icon { font-size: 1.25rem; }

/* --- FAQ Accordion --- */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  text-align: left;
  font-weight: 600;
  font-size: 1rem;
  color: var(--navy);
}
.faq-question::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform 0.2s;
  flex-shrink: 0;
}
.faq-item.open .faq-question::after {
  content: '−';
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}
.faq-answer-inner {
  padding: 0 0 18px;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--navy);
  padding: 56px 0;
  text-align: center;
  color: var(--white);
}
.cta-banner h2 { color: var(--white); margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.7); max-width: 480px; margin: 0 auto 24px; }

/* --- Stats Strip --- */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding: 32px 0;
}
.stat-item { text-align: center; }
.stat-item .num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--amber);
}
.stat-item .label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 2px;
}

@media (min-width: 640px) {
  .stats-strip { grid-template-columns: repeat(4, 1fr); }
}

/* --- Lead Type Cards (electricians) --- */
.lead-type-card {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  transition: box-shadow 0.2s;
}
.lead-type-card:hover { box-shadow: var(--shadow); }
.lead-type-card .icon { font-size: 1.5rem; margin-bottom: 10px; }
.lead-type-card h3 { font-size: 1.0625rem; margin-bottom: 10px; }
.lead-type-card ul { margin-top: 8px; }
.lead-type-card li {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 3px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.lead-type-card li::before {
  content: '✓';
  color: var(--green);
  font-weight: 700;
  font-size: 0.8125rem;
}

/* --- Footer --- */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.6);
  padding: 40px 0 24px;
  font-size: 0.875rem;
}
.footer-inner {
  display: grid;
  gap: 24px;
  margin-bottom: 24px;
}
.footer-col h4 {
  color: var(--white);
  font-size: 0.9375rem;
  margin-bottom: 12px;
}
.footer-col a {
  display: block;
  padding: 4px 0;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--white); }
.footer-col .phone-link { color: var(--amber); font-weight: 600; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.8125rem;
}

@media (min-width: 640px) {
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .footer-inner { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
}

/* --- About section (homepage) --- */
.about-grid {
  display: grid;
  gap: 32px;
  align-items: center;
}
@media (min-width: 768px) {
  .about-grid { grid-template-columns: 1fr 1fr; }
}

/* --- Partner Form (electricians, wider layout) --- */
.partner-form-section {
  max-width: 640px;
  margin: 0 auto;
}
.partner-form-section .form-card {
  padding: 32px 28px;
}

/* --- Page accent overrides --- */
.page-solar { --accent: var(--amber); --accent-hover: var(--amber-hover); }
.page-battery { --accent: var(--indigo); --accent-hover: var(--indigo-hover); }
.page-ev { --accent: var(--green); --accent-hover: var(--green-hover); }
.page-electricians { --accent: var(--amber); --accent-hover: var(--amber-hover); }

/* Accent step-num coloring */
.page-battery .step-num { background: var(--indigo); color: var(--white); }
.page-ev .step-num { background: var(--green); color: var(--white); }

/* --- Misc --- */
.inline-link {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.inline-link:hover { text-decoration: none; }

/* Loading state on form submit */
.form-submit.loading {
  opacity: 0.7;
  pointer-events: none;
}