/* style.css — Lepper Consulting Design System */

/* ========================================
   FONTS
   ======================================== */
/* Playfair Display (display/headings) + Inter (body/UI) loaded via HTML <link> */

/* ========================================
   DESIGN TOKENS
   ======================================== */
:root {
  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* Fluid Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* 4px Spacing System */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Custom Palette — Navy + Gold + Warm White */
  --color-bg: #FAFAF7;
  --color-surface: #FFFFFF;
  --color-surface-2: #F5F3EF;
  --color-surface-offset: #EDEAE5;
  --color-text: #1B2A4A;
  --color-text-muted: #5A6478;
  --color-text-faint: #8A91A0;
  --color-text-inverse: #FAFAF7;
  --color-primary: #1B2A4A;
  --color-primary-hover: #0F1D35;
  --color-accent: #C9A84C;
  --color-accent-hover: #B8952F;
  --color-divider: #E0DDD8;
  --color-border: #D4D1CA;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows (warm-tinted) */
  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);

  /* Content Widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}

/* ========================================
   GLOBAL STYLES
   ======================================== */

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--color-primary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

a:hover {
  color: var(--color-accent);
}

/* ========================================
   LAYOUT UTILITIES
   ======================================== */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* ========================================
   HEADER
   ======================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from #FAFAF7 l c h / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .header__inner {
    padding-inline: var(--space-8);
  }
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-primary);
}

.header__logo svg {
  height: 32px;
  width: auto;
}

.header__nav {
  display: none;
  gap: var(--space-6);
  align-items: center;
}

@media (min-width: 768px) {
  .header__nav {
    display: flex;
  }
}

.header__nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
  letter-spacing: 0.01em;
}

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

/* Mobile menu button */
.header__menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .header__menu-btn {
    display: none;
  }
}

/* Mobile nav overlay */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--color-surface);
  padding: var(--space-8) var(--space-4);
  flex-direction: column;
  gap: var(--space-6);
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav__close {
  align-self: flex-end;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.mobile-nav a {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  text-decoration: none;
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-divider);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  text-align: center;
}

.hero__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: 1.5;
}

.hero__meta {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: var(--space-4);
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-body);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-interactive);
  min-height: 44px;
  cursor: pointer;
  border: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn--gold {
  background-color: var(--color-accent);
  color: var(--color-primary);
}

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

.btn--navy {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn--navy:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-text-inverse);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  background-color: var(--color-surface-2);
  border-color: var(--color-primary);
}

/* ========================================
   SECTION HEADINGS
   ======================================== */
.section__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  font-family: var(--font-body);
}

.section__title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.section__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
}

/* ========================================
   CARDS
   ======================================== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
  color: var(--color-primary);
}

.card__subtitle {
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--space-3);
  font-family: var(--font-body);
}

.card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  display: inline-block;
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  font-weight: 500;
}

/* ========================================
   GRID LAYOUTS
   ======================================== */
.grid-3 {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.grid-2 {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
  align-items: center;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* ========================================
   ABOUT / BIO SECTION
   ======================================== */
.about__image {
  width: 100%;
  max-width: 320px;
  border-radius: var(--radius-lg);
  aspect-ratio: 3/4;
  object-fit: cover;
  margin-inline: auto;
}

@media (min-width: 768px) {
  .about__image {
    margin-inline: 0;
  }
}

.about__badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
}

/* ========================================
   BRANCHEN SECTION
   ======================================== */
.branchen-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-interactive);
}

.branchen-card:hover {
  box-shadow: var(--shadow-sm);
}

.branchen-card__icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  color: var(--color-accent);
}

.branchen-card__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-primary);
}

.branchen-card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ========================================
   CERTIFICATION BAR
   ======================================== */
.cert-bar {
  background: var(--color-primary);
  color: var(--color-accent);
  padding-block: var(--space-6);
  text-align: center;
}

.cert-bar__text {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

/* ========================================
   QUOTES / VALUE PROPOSITIONS
   ======================================== */
.quotes {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .quotes {
    grid-template-columns: repeat(3, 1fr);
  }
}

.quote {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-style: italic;
  color: var(--color-primary);
  line-height: 1.5;
  padding: var(--space-6);
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-accent);
  position: relative;
}

/* ========================================
   CONTACT
   ======================================== */
.contact__list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
}

.contact__item svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-accent);
}

.contact__item a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.contact__item a:hover {
  color: var(--color-accent);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
  text-align: center;
}

.footer__text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.footer__links {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer__links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

/* ========================================
   WoA-SPECIFIC STYLES
   ======================================== */
.hero--woa {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero--woa__bg {
  position: absolute;
  inset: 0;
  object-fit: cover;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero--woa__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    oklch(from #1B2A4A l c h / 0.65) 0%,
    oklch(from #1B2A4A l c h / 0.75) 100%
  );
  z-index: 1;
}

.hero--woa__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-8) var(--space-4);
}

.hero--woa__content .hero__title {
  color: var(--color-text-inverse);
}

.hero--woa__content .hero__subtitle {
  color: rgba(250, 250, 247, 0.85);
}

.hero--woa__content .hero__meta {
  color: rgba(250, 250, 247, 0.65);
}

/* Back link for WoA */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-interactive);
}

.back-link:hover {
  color: var(--color-primary);
}

/* ========================================
   CASES / ERFAHRUNG SECTION
   ======================================== */
.case-cluster {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.case-cluster__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

.case-cluster__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-accent);
}

.case-cluster__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-primary);
}

.case-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.case-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-surface-offset);
}

.case-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.case-item__company {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.case-item__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
}

.case-item__tags {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* Referenz-Cards */
.ref-card {
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  border-left: 3px solid var(--color-accent);
}

.ref-card__type {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.ref-card__desc {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.ref-card__focus {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */
/* Scroll-triggered animation — CSS only using @keyframes */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-timeline: view();
  animation-range: entry 0% entry 30%;
}

/* Fallback: no animation timeline support — show immediately */
@supports not (animation-timeline: view()) {
  .animate-on-scroll {
    animation: none;
    opacity: 1;
    transform: none;
  }
}