/* ==========================================================================
   Dr. Timo Schueler – Personal Site Design System
   Concept: "Refined Natural"
   ========================================================================== */

/* ---------- Custom Properties ---------- */
:root {
  --color-bg:      #F4F1EC;
  --color-ink:     #1B2A35;
  --color-accent:  #2D6A6A;
  --color-warm:    #C47A3A;
  --color-muted:   #7A7068;
  --color-botanical:  #5B8A6E;   /* dezentes Grün für Epigenetik-Karte */
  --color-border:  #DDD7CE;
  --color-surface: #EDE8E1;
  --color-deep:    #0D1E26;

  --font-display: 'DM Serif Display', Georgia, 'Times New Roman', serif;
  --font-body:    'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  --nav-height: 4rem;
  --radius:     4px;
  --radius-lg:  8px;
  --shadow-sm:  0 1px 3px rgba(27, 42, 53, 0.06);
  --shadow-md:  0 4px 12px rgba(27, 42, 53, 0.08);
  --shadow-lg:  0 8px 30px rgba(27, 42, 53, 0.10);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}


/* ---------- Reset / Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

body, h1, h2, h3, h4, p, ul, ol, figure, blockquote {
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-ink);
  background-color: var(--color-bg);
}

img, svg { display: block; max-width: 100%; height: auto; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-warm); }

::selection {
  background: var(--color-accent);
  color: #fff;
}


/* ---------- Typography Scale ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-ink);
}

h1 { font-size: clamp(2rem, 4vw + 0.5rem, 3.25rem); letter-spacing: -0.015em; }
h2 { font-size: clamp(1.6rem, 3vw + 0.3rem, 2.4rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.25rem, 2vw + 0.2rem, 1.75rem); }
h4 { font-size: 1.15rem; }

p + p { margin-top: 1em; }

.display-heading {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw + 0.5rem, 4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw + 0.5rem, 3.25rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw + 0.3rem, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.lead {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--color-muted);
  max-width: 42em;
}

small, .text-sm { font-size: 0.875rem; }

.text-muted { color: var(--color-muted); }
.text-accent { color: var(--color-accent); }
.text-warm { color: var(--color-warm); }


/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}


/* ---------- Navigation ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(244, 241, 236, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.site-nav__logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.site-nav__logo:hover { color: var(--color-accent); }

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: 0.01em;
  position: relative;
}

.site-nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.site-nav__links a:hover { color: var(--color-accent); }
.site-nav__links a:hover::after { width: 100%; }

/* CTA in nav — override the underline effect */
.site-nav__links .btn--cta::after { display: none; }

.btn--cta {
  display: inline-block;
  background: var(--color-warm);
  color: #fff !important;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 0.9rem;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
}
.btn--cta:hover {
  background: #b06b2f;
  color: #fff !important;
  transform: translateY(-1px);
}

/* Hamburger toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2rem;
  height: 2rem;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-ink);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* ---------- Footer ---------- */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-muted);
}

.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer__links {
  display: flex;
  gap: 1.5rem;
}

.site-footer__links a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.site-footer__links a:hover { color: var(--color-accent); }


/* ---------- Sections ---------- */
.section {
  padding: 5rem 0;
}

.section--surface {
  background: var(--color-surface);
}

.section--dark {
  background: var(--color-deep);
  color: rgba(244, 241, 236, 0.9);
}
.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4,
.section--dark .section-title {
  color: #fff;
}
.section--dark .lead { color: rgba(244, 241, 236, 0.65); }
.section--dark a { color: var(--color-accent); }
.section--dark a:hover { color: #3a8888; }
.section--dark .text-accent { color: var(--color-accent); }


/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.7rem 1.6rem;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background: #245858;
  border-color: #245858;
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn--outline:hover {
  background: var(--color-accent);
  color: #fff;
}

.btn--warm {
  background: var(--color-warm);
  color: #fff;
  border-color: var(--color-warm);
}
.btn--warm:hover {
  background: #b06b2f;
  border-color: #b06b2f;
  color: #fff;
  box-shadow: var(--shadow-md);
}


/* ---------- Cards ---------- */
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.method-card {
  display: flex;
  gap: 1.25rem;
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: box-shadow var(--transition), transform var(--transition);
}
.method-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.method-card__icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border-radius: var(--radius);
  color: var(--color-accent);
  font-size: 1.25rem;
}

.method-card__body h3,
.method-card__body h4 {
  margin-bottom: 0.35rem;
}

.method-card__body p {
  color: var(--color-muted);
  font-size: 0.925rem;
  line-height: 1.6;
}

.offering-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}
.offering-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.offering-card__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.offering-card__desc {
  color: var(--color-muted);
  font-size: 0.925rem;
  line-height: 1.6;
  flex: 1;
  margin-bottom: 1.25rem;
}

.offering-card__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.offering-card__price {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-ink);
}

.offering-card__duration {
  color: var(--color-muted);
}


/* ---------- Form Fields ---------- */
.form-field {
  margin-bottom: 1.25rem;
}

.form-field label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 0.7rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-ink);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(45, 106, 106, 0.15);
}

.form-field textarea {
  min-height: 7rem;
  resize: vertical;
}

.form-error {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8rem;
  color: #b54040;
}


/* ---------- Utility: Grids ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

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


/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .site-nav__links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(244, 241, 236, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem;
    gap: 0;
  }

  .site-nav__links.is-open {
    display: flex;
  }

  .site-nav__links li {
    width: 100%;
  }

  .site-nav__links a {
    display: block;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 1rem;
  }

  .site-nav__links a::after { display: none; }

  .site-nav__links li:last-child a {
    border-bottom: none;
    margin-top: 0.5rem;
    text-align: center;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .section { padding: 3rem 0; }

  .site-footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container { padding-inline: 1rem; }
  .section { padding: 2.5rem 0; }
}