/* ============================================
   BUTHERM Enerji — Demo Website Styles
   ============================================ */

:root {
  --color-primary: #e85d04;
  --color-primary-dark: #d00000;
  --color-primary-light: #ff8c42;
  --color-secondary: #0a1628;
  --color-secondary-light: #1a2d4a;
  --color-accent: #ffd166;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --shadow-sm: 0 1px 3px rgba(10, 22, 40, 0.08);
  --shadow-md: 0 4px 20px rgba(10, 22, 40, 0.1);
  --shadow-lg: 0 12px 40px rgba(10, 22, 40, 0.15);
  --shadow-glow: 0 0 40px rgba(232, 93, 4, 0.25);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography */
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 15px rgba(232, 93, 4, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(232, 93, 4, 0.45);
}

.btn--outline {
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn--white {
  background: #fff;
  color: var(--color-secondary);
  box-shadow: var(--shadow-md);
}

.btn--white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 1rem;
}

.btn--full {
  width: 100%;
}

/* Badge */
.badge {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(232, 93, 4, 0.12);
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 20px;
  border: 1px solid rgba(232, 93, 4, 0.2);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

.header.scrolled .logo,
.header.scrolled .nav__link {
  color: var(--color-text);
}

.header.scrolled .nav__link:hover,
.header.scrolled .nav__link.active {
  color: var(--color-primary);
}

.header.scrolled .menu-toggle span {
  background: var(--color-text);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  transition: var(--transition);
}

.logo__icon {
  width: 44px;
  height: 44px;
  color: var(--color-primary);
}

.logo__icon svg {
  width: 100%;
  height: 100%;
}

.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo__text strong {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.logo__text small {
  font-size: 0.75rem;
  font-weight: 500;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__link {
  padding: 8px 16px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav__link:hover,
.nav__link.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.header__cta {
  display: none;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 40px) 0 80px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--color-secondary);
}

.hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(10, 22, 40, 0.92) 0%,
    rgba(10, 22, 40, 0.75) 45%,
    rgba(15, 39, 68, 0.55) 100%
  );
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero__content {
  color: #fff;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero__desc {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.75);
  max-width: 520px;
  margin-bottom: 36px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}

.hero__stats {
  display: flex;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary-light);
}

.stat span {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

/* Sections */
.section {
  padding: 100px 0;
}

.section__header {
  max-width: 600px;
  margin-bottom: 60px;
}

.section__header--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section__tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section__desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

/* Services */
.services {
  background: var(--color-bg-alt);
}

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

.service-card {
  position: relative;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-card--featured {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 100%);
  color: #fff;
  border: none;
}

.service-card--featured .service-card__icon {
  background: rgba(232, 93, 4, 0.2);
  color: var(--color-primary-light);
}

.service-card--featured p {
  color: rgba(255, 255, 255, 0.7);
}

.service-card--featured .service-card__link {
  color: var(--color-primary-light);
}

.service-card__badge {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 4px 12px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 50px;
}

.service-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(232, 93, 4, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.service-card__icon svg {
  width: 32px;
  height: 32px;
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  line-height: 1.65;
}

.service-card__link {
  font-weight: 600;
  color: var(--color-primary);
  transition: var(--transition);
}

.service-card__link:hover {
  color: var(--color-primary-dark);
}

/* About */
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__visual {
  position: relative;
}

.about__image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 100%);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about__image-placeholder {
  width: 50%;
  color: var(--color-primary-light);
  opacity: 0.6;
}

.about__experience {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--color-primary);
  color: #fff;
  padding: 24px 32px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-glow);
}

.about__experience strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
}

.about__experience span {
  font-size: 0.9rem;
  opacity: 0.9;
}

.about__content p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about__features {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.about__features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.about__features svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

/* Why Us */
.why {
  background: var(--color-bg-alt);
}

.why__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.why-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.why-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.why-card__number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(232, 93, 4, 0.15);
  line-height: 1;
  margin-bottom: 16px;
}

.why-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.why-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 60px 0;
}

.cta-banner__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-banner__content {
  color: #fff;
}

.cta-banner__content h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 8px;
}

.cta-banner__content p {
  opacity: 0.9;
  font-size: 1.05rem;
}

/* Contact */
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}

.contact__info > p {
  color: var(--color-text-muted);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

.contact__items {
  display: grid;
  gap: 16px;
}

.contact__item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

a.contact__item:hover {
  background: rgba(232, 93, 4, 0.08);
}

.contact__item-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(232, 93, 4, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.contact__item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.contact__item span {
  font-weight: 500;
}

.contact__form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  transition: var(--transition);
  color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(232, 93, 4, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

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

.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 16px;
}

/* Footer */
.footer {
  background: var(--color-secondary);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 0;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__brand p {
  margin-top: 16px;
  font-size: 0.95rem;
  line-height: 1.6;
}

.logo--footer {
  color: #fff;
}

.footer__links h4,
.footer__contact h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer__links ul {
  display: grid;
  gap: 10px;
}

.footer__links a {
  font-size: 0.95rem;
  transition: var(--transition);
}

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

.footer__contact p {
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  font-size: 0.875rem;
}

.footer__demo {
  opacity: 0.5;
  font-style: italic;
}

/* WhatsApp Float */
.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 60px;
  height: 60px;
  background: #25d366;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  z-index: 999;
  transition: var(--transition);
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 100px;
  right: 28px;
  padding: 16px 24px;
  background: var(--color-secondary);
  color: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1001;
  max-width: 320px;
  font-weight: 500;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(calc(100% + 40px));
  transition:
    opacity 0.4s ease,
    visibility 0.4s ease,
    transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.show {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(0);
}

/* Scroll animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (min-width: 1024px) {
  .nav { display: block; }
  .header__cta { display: inline-flex; }
}

@media (max-width: 1023px) {
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--color-secondary);
    padding: calc(var(--header-height) + 20px) 32px 32px;
    transition: right 0.4s ease;
    box-shadow: var(--shadow-lg);
  }

  .nav.open {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .nav__link {
    display: block;
    width: 100%;
    padding: 14px 16px;
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.85);
  }

  .menu-toggle {
    display: flex;
  }

  .hero__inner {
    max-width: 100%;
    text-align: center;
  }

  .hero__desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__stats {
    justify-content: center;
  }

  .hero__overlay {
    background: linear-gradient(
      180deg,
      rgba(10, 22, 40, 0.88) 0%,
      rgba(10, 22, 40, 0.72) 100%
    );
  }

  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__inner {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .about__experience {
    right: 20px;
  }

  .why__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cta-banner__inner {
    flex-direction: column;
    text-align: center;
  }

  .contact__inner {
    grid-template-columns: 1fr;
  }

  .footer__top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .services__grid {
    grid-template-columns: 1fr;
  }

  .why__grid {
    grid-template-columns: 1fr;
  }

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

  .hero__stats {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }

  .footer__top {
    grid-template-columns: 1fr;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .contact__form {
    padding: 28px 20px;
  }
}