/* ========================================
   GREENING POWERSYSTEMS — DESIGN SYSTEM
   Heller Look. Eine Schrift. Nur Weiß + Grüntöne.
   ======================================== */

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

:root {
  /* Brand Colors — Logo-präzise */
  --green-deep: #007058;
  --green-deeper: #004F3D;
  --green-bright: #009000;
  --green-pale: #F1F8F5;
  --green-light: #E5F1EE;
  --green-soft: #C7E5D8;

  /* Neutrals */
  --black: #1A1A1A;
  --carbon: #2A2A2A;
  --steel: #555555;
  --graphite: #6E6E6E;
  --silver: #9A9A9A;
  --pearl: #C5C5C5;
  --whisper: #ECECEC;
  --white: #FFFFFF;

  /* Typography */
  --font: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Sizes */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: clamp(1.125rem, 1vw + 0.9rem, 1.375rem);
  --fs-xl: clamp(1.5rem, 1.5vw + 1rem, 2rem);
  --fs-2xl: clamp(2rem, 2.5vw + 1rem, 3rem);
  --fs-3xl: clamp(2.5rem, 3.5vw + 1rem, 3.75rem);
  --fs-4xl: clamp(3rem, 5vw + 1rem, 5.5rem);

  /* Spacing & Layout */
  --max-w: 1280px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius-sm: 6px;
  --radius: 14px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 999px;

  /* Effects */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-sm: 0 2px 8px rgba(0, 112, 88, 0.06);
  --shadow: 0 8px 32px rgba(0, 112, 88, 0.08);
  --shadow-lg: 0 24px 60px rgba(0, 112, 88, 0.12);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-padding-top: 100px;
}

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

img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; border: none; background: none; cursor: pointer; }
ul, ol { list-style: none; }
input, textarea, select { font: inherit; }

::selection { background: var(--green-deep); color: var(--white); }

/* ========================================
   LOADER
   ======================================== */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--white);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s var(--ease-out), visibility 0.6s;
}
.page-loader.hidden { opacity: 0; visibility: hidden; }
.loader-content { text-align: center; }
.loader-logo { width: 200px; height: auto; }
.loader-bar {
  width: 200px;
  height: 2px;
  background: var(--whisper);
  margin: 1.5rem auto 0;
  position: relative;
  overflow: hidden;
  border-radius: 2px;
}
.loader-bar::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--green-deep);
  transform-origin: left;
  animation: loaderFill 1.4s var(--ease-out) forwards;
}
@keyframes loaderFill { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.3s, padding 0.3s, box-shadow 0.3s;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-bottom-color: var(--whisper);
}

.nav-logo { display: flex; align-items: center; z-index: 1001; }
.nav-logo img { height: 40px; width: auto; }
@media (max-width: 600px) { .nav-logo img { height: 32px; } }

.nav-menu { display: flex; align-items: center; gap: 0.25rem; }
.nav-item { position: relative; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--carbon);
  border-radius: var(--radius-full);
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--green-deep); background: var(--green-pale); }
.nav-link.active { color: var(--green-deep); }
.nav-link svg { width: 12px; height: 12px; transition: transform 0.3s; }
.nav-item.has-dropdown:hover .nav-link svg { transform: rotate(180deg); }

.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px); left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 280px;
  background: var(--white);
  border: 1px solid var(--whisper);
  border-radius: var(--radius);
  padding: 0.5rem;
  box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden;
  transition: all 0.3s var(--ease-out);
}
.nav-item.has-dropdown:hover .nav-dropdown {
  opacity: 1; visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown-link {
  display: flex;
  flex-direction: column;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}
.nav-dropdown-link:hover { background: var(--green-pale); }
.nav-dropdown-link strong { font-size: 0.95rem; font-weight: 600; color: var(--black); }
.nav-dropdown-link span { font-size: 0.78rem; color: var(--graphite); margin-top: 0.15rem; }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  background: var(--green-deep);
  color: var(--white);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: background 0.2s, transform 0.3s, box-shadow 0.3s;
  margin-left: 0.5rem;
}
.nav-cta:hover {
  background: var(--green-bright);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0, 144, 0, 0.25);
}
.nav-cta .arrow { transition: transform 0.3s; }
.nav-cta:hover .arrow { transform: translateX(3px); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span {
  width: 22px; height: 1.5px;
  background: var(--carbon);
  transition: transform 0.3s, opacity 0.3s;
}

@media (max-width: 1024px) {
  .nav-menu {
    position: fixed; inset: 0;
    background: var(--white);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 6rem var(--gutter) 2rem;
    gap: 0.5rem;
    transform: translateX(100%);
    transition: transform 0.4s var(--ease-out);
    z-index: 999;
  }
  .nav-menu.open { transform: translateX(0); }
  .nav-link { color: var(--black); font-size: 1.5rem; padding: 0.6rem 0; font-weight: 600; }
  .nav-dropdown {
    position: static; transform: none;
    background: transparent; border: none; box-shadow: none;
    padding: 0 0 0 1rem;
    opacity: 1; visibility: visible;
    min-width: 0;
  }
  .nav-cta { margin-top: 2rem; padding: 1rem 1.5rem; font-size: 1rem; }
  .nav-toggle { display: flex; z-index: 1001; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 1.5rem;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  border-radius: var(--radius-full);
  transition: all 0.3s var(--ease-out);
  cursor: pointer;
}

.btn-primary {
  background: var(--green-deep);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--green-bright);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 144, 0, 0.25);
}

.btn-ghost {
  background: var(--white);
  color: var(--green-deep);
  border: 1.5px solid var(--green-deep);
}
.btn-ghost:hover {
  background: var(--green-deep);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--green-deep);
  transition: gap 0.3s;
}
.btn-arrow:hover { gap: 1rem; color: var(--green-bright); }
.btn-arrow svg { width: 18px; height: 18px; transition: transform 0.3s; }
.btn-arrow:hover svg { transform: translateX(4px); }

/* ========================================
   TYPOGRAPHY UTILS
   ======================================== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--green-deep);
}
.eyebrow::before {
  content: '';
  width: 24px; height: 1px;
  background: currentColor;
}

.h-display {
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--black);
}
.h-section {
  font-weight: 700;
  font-size: var(--fs-3xl);
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  color: var(--black);
}
.h-accent { color: var(--green-deep); }

.lead {
  font-size: var(--fs-lg);
  line-height: 1.55;
  color: var(--steel);
  font-weight: 400;
  max-width: 60ch;
}

/* ========================================
   LAYOUT
   ======================================== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter); }
section { padding: 8rem 0; position: relative; }
@media (max-width: 768px) { section { padding: 5rem 0; } }

.section-pale { background: var(--green-pale); }
.section-white { background: var(--white); }

.section-header {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  margin-bottom: 4rem;
  align-items: end;
}
@media (max-width: 900px) { .section-header { grid-template-columns: 1fr; gap: 1.5rem; } }

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--green-pale);
  color: var(--carbon);
  padding: 5rem var(--gutter) 2rem;
  border-top: 1px solid var(--green-soft);
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; }
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--green-soft);
}
@media (max-width: 1000px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer-top { grid-template-columns: 1fr; } }

.footer-brand img { height: 44px; width: auto; margin-bottom: 1.25rem; }
.footer-brand p {
  color: var(--steel);
  font-size: 0.95rem;
  max-width: 38ch;
  line-height: 1.55;
}

.footer-col h4 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-deep);
  margin-bottom: 1.25rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col a, .footer-col li { color: var(--steel); font-size: 0.92rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--green-deep); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.5rem;
  font-size: 0.82rem;
  color: var(--graphite);
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom-links { display: flex; gap: 1.5rem; }

/* ========================================
   ANIMATIONS UTILITY
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal[data-delay="4"] { transition-delay: 0.4s; }
.reveal[data-delay="5"] { transition-delay: 0.5s; }

.magnetic { display: inline-block; transition: transform 0.4s var(--ease-out); }