/* ==========================================================================
   HAMAL Official Website - Braun / Dieter Rams Minimalist Design System
   "Less, but better" (Weniger, aber besser)
   ========================================================================== */

/* --- 1. DESIGN TOKENS & SYSTEM VARIABLES --- */
:root {
  /* Color Palette */
  --bg-page: #F6F6F4;
  --bg-surface: #FFFFFF;
  --bg-subtle: #EFEFEA;
  --bg-hover: #E8E8E2;
  --bg-dark: #141414;
  --bg-dark-hover: #2A2A2A;

  --text-primary: #141414;
  --text-secondary: #585854;
  --text-muted: #84847E;
  --text-inverse: #FFFFFF;

  --border-color: #E2E2DC;
  --border-dark: #141414;

  --accent-orange: #EB7617;
  --accent-orange-hover: #D4650E;
  --accent-orange-subtle: rgba(235, 118, 23, 0.08);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Sizing & Structure */
  --container-max: 1080px;
  --header-height: 56px;
  --radius: 2px;

  --transition: 0.15s ease;
}

/* --- 2. BASE & RESET --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg {
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* --- 3. HEADER --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(246, 246, 244, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
}

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

.brand-wrapper {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.brand-title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-primary);
  text-transform: uppercase;
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition);
  padding: 4px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link.active {
  border-bottom: 1.5px solid var(--text-primary);
}

.nav-link-ext {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.ext-arrow {
  font-size: 0.85em;
  opacity: 0.6;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  gap: 4px;
}

.mobile-toggle .bar {
  width: 18px;
  height: 1.5px;
  background-color: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-toggle.is-open .bar:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.mobile-toggle.is-open .bar:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.is-open .bar:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

.mobile-drawer {
  display: none;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 24px;
}

.mobile-drawer.is-open {
  display: block;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--text-primary);
}

/* --- 4. BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--accent-orange);
  color: var(--text-inverse);
  border-color: var(--accent-orange);
}

.btn-primary:hover {
  background-color: var(--accent-orange-hover);
  border-color: var(--accent-orange-hover);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-subtle);
  border-color: var(--text-primary);
}

.btn-sm {
  font-size: 0.75rem;
  padding: 8px 16px;
}

/* --- 5. HERO SECTION --- */
.hero-section {
  padding-top: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--border-color);
}

.hero-content {
  max-width: 680px;
}

.hero-headline {
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

/* Abstract Product / Wire Diagram */
.hero-diagram-wrapper {
  margin-top: 20px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}

.product-diagram {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 580px;
}

.diagram-node {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-icon {
  width: 16px;
  height: 16px;
  color: var(--text-primary);
}

.node-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  text-transform: uppercase;
}

.diagram-link {
  flex: 1;
  position: relative;
  margin-left: 20px;
  margin-right: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--border-color);
}

.diagram-badge {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-page);
  padding: 0 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-orange);
  text-transform: uppercase;
}

.diagram-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--accent-orange);
}

/* --- 6. FEATURES (3x2 GRID) --- */
.features-section {
  padding-top: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--border-color);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border-color);
  background-color: var(--border-color);
  gap: 1px;
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-cell {
  background-color: var(--bg-surface);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: background-color var(--transition);
}

.feature-cell:hover {
  background-color: #FAFAF8;
}

.feature-icon {
  margin-bottom: 20px;
  color: var(--text-primary);
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature-title {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.feature-text {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* --- 7. HOW IT WORKS --- */
.works-section {
  padding-top: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--border-color);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.step-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.90rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* --- 8. PRODUCT PRINCIPLE --- */
.principle-section {
  padding-top: 90px;
  padding-bottom: 90px;
  border-bottom: 1px solid var(--border-color);
}

.principle-inner {
  max-width: 680px;
}

.principle-accent-line {
  width: 32px;
  height: 3px;
  background-color: var(--accent-orange);
  margin-bottom: 24px;
}

.principle-heading {
  font-size: clamp(1.8rem, 3.8vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.principle-text {
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* --- 9. DOWNLOAD SECTION --- */
.download-section {
  padding-top: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-surface);
}

.download-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  max-width: 680px;
}

.download-headline {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.download-subtext {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.download-btn-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.platforms-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.platform-pill {
  color: var(--text-secondary);
}

.platform-divider {
  color: var(--border-color);
}

.store-links-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  width: 100%;
}

.store-link-item {
  display: flex;
  align-items: center;
}

.store-action-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.store-platform-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
  background-color: var(--bg-subtle);
  padding: 2px 8px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.store-link-text {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.store-action-link:hover {
  color: var(--text-primary);
}

.store-action-link:hover .store-platform-label {
  border-color: var(--text-primary);
}

.store-action-link:hover .store-link-text {
  color: var(--accent-orange);
}

/* --- 10. FAQ ACCORDION --- */
.faq-section {
  padding-top: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--border-color);
}

.faq-container-inner {
  max-width: 760px;
}

.faq-list {
  display: flex;
  flex-direction: column;
}

.faq-row {
  border-top: 1px solid var(--border-color);
}

.faq-row:last-child {
  border-bottom: 1px solid var(--border-color);
}

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  padding: 20px 0;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  background: none;
  border: none;
}

.faq-toggle-icon {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-muted);
  line-height: 1;
  transition: transform var(--transition), color var(--transition);
  margin-left: 16px;
  flex-shrink: 0;
}

.faq-row.is-active .faq-toggle-icon {
  transform: rotate(45deg);
  color: var(--text-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease, padding 0.2s ease;
}

.faq-row.is-active .faq-answer {
  max-height: 250px;
  padding-bottom: 20px;
}

.faq-answer p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* --- 11. FOOTER --- */
.site-footer {
  padding-top: 60px;
  padding-bottom: 48px;
  background-color: var(--bg-page);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-title {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.footer-brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.footer-col-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links-list a {
  font-size: 0.82rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer-links-list a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-legal-copy {
  display: flex;
  gap: 8px;
}

/* --- 12. PRIVACY MODAL --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(20, 20, 20, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop.is-active {
  display: flex;
}

.modal-window {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08);
  width: 100%;
  max-width: 520px;
  overflow: hidden;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-page);
}

.modal-tag {
  font-family: var(--font-mono);
  font-size: 0.70rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.modal-close {
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 24px 20px;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.modal-p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  padding: 12px 20px;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-page);
}

/* --- 13. RESPONSIVE BREAKPOINTS --- */
@media (max-width: 860px) {
  .main-nav {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

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

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 560px) {
  .hero-section {
    padding-top: 50px;
    padding-bottom: 60px;
  }

  .hero-headline {
    font-size: 1.85rem;
  }

  .product-diagram {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .diagram-link {
    width: 100%;
    margin: 0;
  }

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

  .feature-cell {
    padding: 28px 20px;
  }

  .download-btn-group {
    flex-direction: column;
    width: 100%;
  }

  .download-btn-group .btn {
    width: 100%;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}