/* ===========================
   WATT SA — Design System
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --yellow: #E8B800;
  --yellow-dark: #C49C00;
  --yellow-light: #FFF3B0;
  --dark: #0D0D0D;
  --dark-2: #141414;
  --dark-3: #1E1E1E;
  --dark-4: #2A2A2A;
  --gray: #6B6B6B;
  --gray-light: #ABABAB;
  --light: #F5F5F5;
  --white: #FFFFFF;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.2);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1160px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--dark);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ===========================
   TYPOGRAPHY
   =========================== */

h1, h2, h3, h4, h5 {
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.text-yellow { color: var(--yellow); }
.text-gray { color: var(--gray-light); }

/* ===========================
   LAYOUT
   =========================== */

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

.section {
  padding: 96px 0;
}

.section--dark { background: var(--dark); }
.section--dark-2 { background: var(--dark-2); }
.section--dark-3 { background: var(--dark-3); }

/* ===========================
   NAVBAR
   =========================== */

.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 24px;
  background: rgba(13,13,13,0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  height: 72px;
  display: flex;
  align-items: center;
}

.navbar__inner {
  max-width: var(--container);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo img {
  height: 36px;
  width: auto;
}

.navbar__logo-text {
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--yellow);
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.navbar__nav a {
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-light);
  border-radius: 8px;
  transition: var(--transition);
  white-space: nowrap;
}

.navbar__nav a:hover,
.navbar__nav a.active {
  color: var(--white);
  background: rgba(255,255,255,0.07);
}

.navbar__nav a.active {
  color: var(--yellow);
}

.navbar__cta {
  background: var(--yellow) !important;
  color: var(--dark) !important;
  font-weight: 700 !important;
  padding: 10px 20px !important;
  border-radius: 8px !important;
}

.navbar__cta:hover {
  background: var(--yellow-dark) !important;
}

.navbar__contact {
  display: none;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--gray-light);
}

.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

.navbar__hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.navbar__hamburger.open span:nth-child(2) { opacity: 0; }
.navbar__hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.navbar__mobile {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: var(--dark-2);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 16px 24px 24px;
  z-index: 999;
  flex-direction: column;
  gap: 4px;
}

.navbar__mobile.open { display: flex; }

.navbar__mobile a {
  display: block;
  padding: 14px 16px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--gray-light);
  border-radius: 8px;
  transition: var(--transition);
}

.navbar__mobile a:hover,
.navbar__mobile a.active {
  color: var(--yellow);
  background: rgba(232,184,0,0.08);
}

.navbar__mobile-info {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.85rem;
  color: var(--gray-light);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ===========================
   HERO
   =========================== */

.hero {
  padding-top: 72px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(232,184,0,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(232,184,0,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin: 0 auto;
  padding: 80px 24px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232,184,0,0.12);
  border: 1px solid rgba(232,184,0,0.25);
  color: var(--yellow);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 28px;
}

.hero__title {
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 800px;
  margin-bottom: 24px;
}

.hero__title span { color: var(--yellow); }

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--gray-light);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.hero__stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid rgba(255,255,255,0.08);
  flex-wrap: wrap;
}

.hero__stat-num {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--yellow);
  letter-spacing: -0.03em;
}

.hero__stat-label {
  font-size: 0.85rem;
  color: var(--gray-light);
  margin-top: 2px;
}

/* Page hero (subpages) */
.page-hero {
  padding-top: 72px;
  background: var(--dark-2);
  padding-bottom: 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.page-hero__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 72px 24px 64px;
}

.page-hero__title {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.page-hero__desc {
  font-size: 1.1rem;
  color: var(--gray-light);
  max-width: 600px;
  line-height: 1.7;
}

/* ===========================
   BUTTONS
   =========================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--yellow);
  color: var(--dark);
}

.btn--primary:hover {
  background: var(--yellow-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(232,184,0,0.35);
}

.btn--secondary {
  background: rgba(255,255,255,0.06);
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.12);
}

.btn--secondary:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--yellow);
  border: 1.5px solid var(--yellow);
}

.btn--outline:hover {
  background: rgba(232,184,0,0.08);
  transform: translateY(-2px);
}

/* ===========================
   CARDS
   =========================== */

.card {
  background: var(--dark-3);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(232,184,0,0.25);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.card__icon {
  width: 56px;
  height: 56px;
  background: rgba(232,184,0,0.12);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--yellow);
}

.card__icon svg {
  width: 28px;
  height: 28px;
}

.card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card__text {
  font-size: 0.9rem;
  color: var(--gray-light);
  line-height: 1.7;
}

/* ===========================
   SECTION HEADER
   =========================== */

.section-header {
  margin-bottom: 56px;
}

.section-header--center {
  text-align: center;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 56px;
}

.section-eyebrow {
  display: inline-block;
  color: var(--yellow);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  line-height: 1.12;
}

.section-title span { color: var(--yellow); }

.section-desc {
  font-size: 1rem;
  color: var(--gray-light);
  line-height: 1.75;
  max-width: 560px;
}

/* ===========================
   GRID LAYOUTS
   =========================== */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

/* ===========================
   CTA BANNER
   =========================== */

.cta-banner {
  background: linear-gradient(135deg, var(--yellow) 0%, var(--yellow-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
}

.cta-banner__title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 900;
  color: var(--dark);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  position: relative;
}

.cta-banner__desc {
  font-size: 1rem;
  color: rgba(13,13,13,0.7);
  margin-bottom: 32px;
  position: relative;
}

.cta-banner__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

.cta-banner .btn--primary {
  background: var(--dark);
  color: var(--white);
}

.cta-banner .btn--primary:hover {
  background: #111;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.cta-banner .btn--secondary {
  background: rgba(13,13,13,0.15);
  color: var(--dark);
  border-color: rgba(13,13,13,0.25);
}

/* ===========================
   FOOTER
   =========================== */

.footer {
  background: var(--dark-2);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0 32px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__logo-text {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--yellow);
  letter-spacing: -0.04em;
  margin-bottom: 12px;
}

.footer__tagline {
  font-size: 0.875rem;
  color: var(--gray-light);
  line-height: 1.6;
  max-width: 240px;
}

.footer__col-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 16px;
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--gray-light);
  transition: var(--transition);
}

.footer__links a:hover { color: var(--white); }

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--gray-light);
  margin-bottom: 12px;
}

.footer__contact-item svg {
  width: 16px;
  height: 16px;
  color: var(--yellow);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer__bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--gray);
  gap: 16px;
  flex-wrap: wrap;
}

/* ===========================
   DIVIDER / ACCENT
   =========================== */

.yellow-line {
  width: 48px;
  height: 4px;
  background: var(--yellow);
  border-radius: 2px;
  margin: 16px 0;
}

.yellow-line--center { margin: 16px auto; }

/* ===========================
   BADGE
   =========================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,184,0,0.1);
  border: 1px solid rgba(232,184,0,0.2);
  color: var(--yellow);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}

/* ===========================
   CONTACT FORM
   =========================== */

.form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form__label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gray-light);
  letter-spacing: 0.03em;
}

.form__input,
.form__textarea {
  background: var(--dark-4);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 14px 16px;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--white);
  outline: none;
  transition: var(--transition);
  width: 100%;
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--gray);
}

.form__input:focus,
.form__textarea:focus {
  border-color: var(--yellow);
  background: rgba(232,184,0,0.04);
}

.form__textarea {
  min-height: 140px;
  resize: vertical;
}

/* ===========================
   CONTACT INFO BOX
   =========================== */

.contact-box {
  background: var(--dark-3);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.contact-box__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.contact-box__item:last-child { border-bottom: none; }

.contact-box__icon {
  width: 44px;
  height: 44px;
  background: rgba(232,184,0,0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--yellow);
  flex-shrink: 0;
}

.contact-box__icon svg { width: 20px; height: 20px; }

.contact-box__label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray);
  margin-bottom: 4px;
}

.contact-box__value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.contact-box__sub {
  font-size: 0.85rem;
  color: var(--gray-light);
  margin-top: 2px;
}

/* ===========================
   TEAM CARD
   =========================== */

.team-card {
  background: var(--dark-3);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.team-card:hover {
  border-color: rgba(232,184,0,0.2);
  transform: translateY(-4px);
}

.team-card__avatar {
  width: 72px;
  height: 72px;
  background: rgba(232,184,0,0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--yellow);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 20px;
}

.team-card--founder .team-card__avatar {
  background: rgba(232,184,0,0.2);
  border: 2px solid rgba(232,184,0,0.4);
}

.team-card__name {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.team-card__role {
  font-size: 0.8rem;
  color: var(--yellow);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.team-card__desc {
  font-size: 0.875rem;
  color: var(--gray-light);
  line-height: 1.65;
}

.team-card__exp {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--gray-light);
  margin-top: 16px;
  background: rgba(255,255,255,0.05);
  padding: 6px 12px;
  border-radius: 8px;
}

.team-card__exp svg { width: 14px; height: 14px; color: var(--yellow); }

/* ===========================
   HIGHLIGHT SECTION
   =========================== */

.highlight {
  background: rgba(232,184,0,0.04);
  border: 1px solid rgba(232,184,0,0.12);
  border-radius: var(--radius-lg);
  padding: 48px;
}

.highlight__quote {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
  letter-spacing: -0.01em;
}

.highlight__quote span { color: var(--yellow); }

/* ===========================
   BACK TO TOP
   =========================== */

.back-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--yellow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 100;
  border: none;
  color: var(--dark);
}

.back-top.visible { opacity: 1; pointer-events: all; }
.back-top:hover { background: var(--yellow-dark); transform: translateY(-3px); }

/* ===========================
   RESPONSIVE
   =========================== */

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .navbar__nav, .navbar__contact { display: none; }
  .navbar__hamburger { display: flex; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero__stats { gap: 28px; }
  .cta-banner { padding: 40px 24px; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .form__row { grid-template-columns: 1fr; }
  .page-hero__inner { padding: 56px 24px 48px; }
  .contact-box { padding: 24px; }
  .highlight { padding: 32px 24px; }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .cta-banner__actions { flex-direction: column; align-items: center; }
  .hero__inner { padding: 60px 24px; }
}