/* ===========================
   RESET & BASE
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --yellow: #F5C518;
  --yellow-dark: #d4a800;
  --dark: #0D0F14;
  --dark2: #161A22;
  --dark3: #1E2330;
  --border: rgba(255,255,255,0.08);
  --text: #E8EAF0;
  --text-muted: #8A8FA8;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 4px 32px rgba(0,0,0,0.4);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; }

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section { padding: 5rem 0; }

/* ===========================
   BUTTONS
=========================== */
.btn {
  display: inline-block;
  padding: 0.85rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--yellow);
  color: var(--dark);
  border-color: var(--yellow);
}
.btn-primary:hover { background: var(--yellow-dark); border-color: var(--yellow-dark); transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--yellow);
  border-color: var(--yellow);
}
.btn-outline:hover { background: var(--yellow); color: var(--dark); }

.btn-full { width: 100%; text-align: center; }

/* ===========================
   NAVBAR
=========================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem 0;
  background: rgba(13,15,20,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: padding 0.3s;
}
.navbar.scrolled { padding: 0.6rem 0; }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.logo span { color: var(--yellow); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a { font-size: 0.9rem; color: var(--text-muted); transition: color 0.2s; }
.nav-links a:hover { color: var(--white); }
.btn-nav {
  background: var(--yellow);
  color: var(--dark) !important;
  padding: 0.5rem 1.2rem;
  border-radius: 7px;
  font-weight: 600;
}
.btn-nav:hover { background: var(--yellow-dark) !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===========================
   HERO
=========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 7rem 0 4rem;
  background: radial-gradient(ellipse at 70% 50%, rgba(245,197,24,0.06) 0%, transparent 60%),
              linear-gradient(180deg, var(--dark) 0%, var(--dark2) 100%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.badge {
  display: inline-block;
  background: rgba(245,197,24,0.12);
  color: var(--yellow);
  border: 1px solid rgba(245,197,24,0.3);
  padding: 0.35rem 1rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1.2rem;
  letter-spacing: 0.5px;
}

.hero-text h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 1.2rem;
}
.highlight { color: var(--yellow); }

.hero-text p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 480px;
}
.hero-text p strong { color: var(--yellow); }

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

.hero-stats {
  display: flex;
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.stat strong { display: block; font-size: 1.5rem; font-weight: 800; color: var(--white); }
.stat span { font-size: 0.8rem; color: var(--text-muted); }

/* Panel visual */
.hero-visual { display: flex; flex-direction: column; gap: 1.5rem; align-items: center; }

.panel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  width: 100%;
  max-width: 420px;
}
.panel {
  aspect-ratio: 1.4/1;
  background: linear-gradient(135deg, #1a2840 0%, #0d1a2e 100%);
  border-radius: 6px;
  border: 1px solid rgba(245,197,24,0.2);
  position: relative;
  overflow: hidden;
}
.panel::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent 0,
    transparent calc(33% - 1px),
    rgba(245,197,24,0.08) calc(33% - 1px),
    rgba(245,197,24,0.08) 33%
  ),
  repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent calc(33% - 1px),
    rgba(245,197,24,0.08) calc(33% - 1px),
    rgba(245,197,24,0.08) 33%
  );
}

.solar-card {
  background: var(--dark3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  max-width: 420px;
}
.solar-icon { font-size: 2rem; }
.solar-info p { font-size: 0.85rem; color: var(--text-muted); }
.solar-saving { color: var(--text) !important; margin-top: 0.2rem; }
.solar-saving strong { color: var(--yellow); }

/* ===========================
   SECTION HEADER
=========================== */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.75rem;
}
.section-header p { color: var(--text-muted); font-size: 1.05rem; }

/* ===========================
   SERVICII
=========================== */
.servicii { background: var(--dark2); }

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

.card {
  background: var(--dark3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}
.card:hover { transform: translateY(-4px); border-color: rgba(245,197,24,0.3); }

.card-featured {
  border-color: var(--yellow);
  background: linear-gradient(135deg, var(--dark3) 0%, rgba(245,197,24,0.04) 100%);
}

.card-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--yellow);
  color: var(--dark);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.9rem;
  border-radius: 100px;
  white-space: nowrap;
}

.card-icon { font-size: 2.2rem; margin-bottom: 1rem; }
.card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.75rem; }
.card p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.2rem; }
.card ul { display: flex; flex-direction: column; gap: 0.5rem; }
.card li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-left: 1.2rem;
  position: relative;
}
.card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--yellow);
  font-weight: 700;
}

/* ===========================
   AVANTAJE
=========================== */
.avantaje-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.avantaj {
  padding: 1.5rem;
  border-left: 3px solid var(--border);
  transition: border-color 0.2s;
}
.avantaj:hover { border-color: var(--yellow); }

.avantaj-nr {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 0.75rem;
  letter-spacing: 1px;
}
.avantaj h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.avantaj p { font-size: 0.88rem; color: var(--text-muted); }

/* ===========================
   CALCULATOR
=========================== */
.calculator { background: var(--dark2); }

.calc-wrapper {
  max-width: 700px;
  margin: 0 auto;
  background: var(--dark3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
}

.calc-inputs { display: flex; flex-direction: column; gap: 1.2rem; margin-bottom: 1.5rem; }

.calc-field { display: flex; flex-direction: column; gap: 0.4rem; }
.calc-field label { font-size: 0.9rem; font-weight: 500; color: var(--text-muted); }
.calc-field input,
.calc-field select {
  background: var(--dark2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--text);
  font-size: 1rem;
  font-family: 'Inter', sans-serif;
  transition: border-color 0.2s;
}
.calc-field input:focus,
.calc-field select:focus {
  outline: none;
  border-color: var(--yellow);
}
.calc-field select option { background: var(--dark2); }

.calc-results {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}
.result-item span { color: var(--text-muted); }
.result-item strong { color: var(--white); font-size: 1rem; }
.highlight-result { background: rgba(245,197,24,0.06); border-radius: 8px; padding: 0.8rem 1rem; border: 1px solid rgba(245,197,24,0.2); border-bottom: 1px solid rgba(245,197,24,0.2); }
.highlight-result strong { color: var(--yellow); font-size: 1.1rem; }

/* ===========================
   CONTACT
=========================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 3rem;
  align-items: start;
}

.contact-form {
  background: var(--dark3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

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

.form-field { display: flex; flex-direction: column; gap: 0.4rem; }
.form-field label { font-size: 0.85rem; font-weight: 500; color: var(--text-muted); }
.form-field input,
.form-field select,
.form-field textarea {
  background: var(--dark2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--text);
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  transition: border-color 0.2s;
  resize: vertical;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--yellow);
}

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-top: 0.5rem;
}
.contact-info h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; }

.contact-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.ci-icon { font-size: 1.3rem; margin-top: 0.1rem; }
.contact-item strong { display: block; font-size: 0.85rem; margin-bottom: 0.25rem; }
.contact-item p { font-size: 0.9rem; color: var(--text-muted); }
.contact-item a { color: var(--yellow); }
.contact-item a:hover { text-decoration: underline; }

/* Success message */
.form-success {
  text-align: center;
  padding: 2rem;
}
.form-success h3 { color: var(--yellow); font-size: 1.5rem; margin-bottom: 0.75rem; }
.form-success p { color: var(--text-muted); }

/* ===========================
   FOOTER
=========================== */
.footer {
  background: var(--dark2);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  text-align: center;
}
.footer-brand p { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.4rem; }
.footer-links { display: flex; gap: 2rem; flex-wrap: wrap; justify-content: center; }
.footer-links a { font-size: 0.85rem; color: var(--text-muted); transition: color 0.2s; }
.footer-links a:hover { color: var(--yellow); }
.footer-copy { font-size: 0.8rem; color: var(--text-muted); }

/* ===========================
   SCROLL ANIMATIONS
=========================== */
.fade-down {
  opacity: 0;
  transform: translateY(-40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-down.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-down.delay-1 { transition-delay: 0.1s; }
.fade-down.delay-2 { transition-delay: 0.2s; }
.fade-down.delay-3 { transition-delay: 0.3s; }
.fade-down.delay-4 { transition-delay: 0.4s; }
.fade-down.delay-5 { transition-delay: 0.5s; }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-visual { order: -1; }
  .cards-grid { grid-template-columns: 1fr 1fr; }
  .avantaje-grid { grid-template-columns: 1fr 1fr; }
  .contact-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 3.5rem 0; }
  .cards-grid { grid-template-columns: 1fr; }
  .avantaje-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.2rem; }
  .form-row { grid-template-columns: 1fr; }

  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--dark2);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.2rem;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .btn-nav { text-align: center; }

  .calc-wrapper { padding: 1.5rem; }
}