/* ========================================================
   agile-management.eu — Design Tokens & Styles
   ======================================================== */

:root {
  /* 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,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  /* Spacing */
  --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;

  /* Fonts */
  --font-body: 'Switzer', 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'Switzer', 'Helvetica Neue', Arial, sans-serif;

  /* Radius */
  --radius-sm: 0.25rem;
  --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);

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

/* ---- LIGHT MODE ---- */
:root, [data-theme="light"] {
  --color-bg:             #f5f5f3;
  --color-surface:        #ffffff;
  --color-surface-2:      #fafaf8;
  --color-border:         #d8d8d4;
  --color-divider:        #e4e4e0;

  --color-text:           #1a1a1a;
  --color-text-muted:     #6b6b6b;
  --color-text-faint:     #a0a0a0;

  --color-primary:        #1a2332;
  --color-primary-hover:  #2a3a52;
  --color-primary-light:  #e8ecf2;
  --color-accent:         #2d5a7b;
  --color-accent-hover:   #1e4562;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.07);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.1);
}

/* ---- DARK MODE ---- */
[data-theme="dark"] {
  --color-bg:             #0f1218;
  --color-surface:        #171c24;
  --color-surface-2:      #1c222c;
  --color-border:         #2a3040;
  --color-divider:        #232938;

  --color-text:           #d4d4d4;
  --color-text-muted:     #8a8a90;
  --color-text-faint:     #555560;

  --color-primary:        #a0b4cc;
  --color-primary-hover:  #c0d0e4;
  --color-primary-light:  #1e2636;
  --color-accent:         #5a9cc4;
  --color-accent-hover:   #7ab4d8;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0f1218;
    --color-surface:        #171c24;
    --color-surface-2:      #1c222c;
    --color-border:         #2a3040;
    --color-divider:        #232938;
    --color-text:           #d4d4d4;
    --color-text-muted:     #8a8a90;
    --color-text-faint:     #555560;
    --color-primary:        #a0b4cc;
    --color-primary-hover:  #c0d0e4;
    --color-primary-light:  #1e2636;
    --color-accent:         #5a9cc4;
    --color-accent-hover:   #7ab4d8;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
  }
}

/* ========================================================
   LAYOUT
   ======================================================== */

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow {
  max-width: var(--content-default);
}

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

/* ========================================================
   HEADER / NAV
   ======================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s ease;
}

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

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  gap: var(--space-4);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo__mark {
  flex-shrink: 0;
}

.logo__text {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.2;
}

.logo__text span {
  display: block;
  font-weight: 400;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-top: 1px;
}

.nav { display: flex; align-items: center; gap: var(--space-6); }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-primary);
  transition: width 0.25s ease;
}

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

.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.btn-icon:hover {
  background: var(--color-primary-light);
  color: var(--color-text);
}

.lang-toggle {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.lang-toggle:hover {
  background: var(--color-primary-light);
  color: var(--color-text);
  border-color: var(--color-primary);
}

/* Mobile nav */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.nav__burger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text);
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 85vw);
    height: 100dvh;
    flex-direction: column;
    background: var(--color-bg);
    padding: var(--space-20) var(--space-8) var(--space-8);
    gap: var(--space-6);
    transition: right 0.35s ease;
    z-index: 100;
    box-shadow: var(--shadow-lg);
  }

  .nav__links.active { right: 0; }

  .nav__links a {
    font-size: var(--text-lg);
    color: var(--color-text);
  }

  .nav__burger { display: flex; }

  .nav__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 99;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
  }

  .nav__overlay.active {
    opacity: 1;
    pointer-events: auto;
  }
}

/* ========================================================
   HERO
   ======================================================== */

.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--color-primary);
}

.hero__bg {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background:
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 60px,
      var(--color-text) 60px,
      var(--color-text) 61px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 60px,
      var(--color-text) 60px,
      var(--color-text) 61px
    );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-6);
}

.hero h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero p {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.7);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: #ffffff;
  color: var(--color-primary);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
}

.hero__cta:hover {
  background: rgba(255,255,255,0.9);
  transform: translateY(-1px);
}

.hero__cta svg {
  width: 16px;
  height: 16px;
  display: inline;
  transition: transform 0.2s ease;
}

.hero__cta:hover svg {
  transform: translateX(3px);
}

/* ========================================================
   SECTION TITLES
   ======================================================== */

.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

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

.section-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: var(--space-10);
}

/* ========================================================
   SERVICES (Leistungen)
   ======================================================== */

.services { background: var(--color-bg); }

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: var(--space-6);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

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

.service-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  color: var(--color-primary);
}

.service-card__icon svg {
  width: 24px;
  height: 24px;
}

.service-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.service-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ========================================================
   METHODOLOGY
   ======================================================== */

.methodology {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .method-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.method-item {
  text-align: center;
  padding: var(--space-6);
}

.method-item__badge {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--text-lg);
}

.method-item h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.method-item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 320px;
  margin-inline: auto;
}

/* ========================================================
   ABOUT
   ======================================================== */

.about { background: var(--color-bg); }

.about__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 768px) {
  .about__layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.about__text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.certs-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.certs-list li {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
}

.stat-card__value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-card__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

/* ========================================================
   REFERENCES
   ======================================================== */

.references {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(360px, 100%), 1fr));
  gap: var(--space-6);
}

.ref-card {
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
}

.ref-card__quote {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
  font-style: italic;
  flex: 1;
  margin-bottom: var(--space-6);
  position: relative;
  padding-left: var(--space-5);
  border-left: 2px solid var(--color-accent);
}

.ref-card__author {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ref-card__name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.ref-card__role {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ========================================================
   CLIENTS
   ======================================================== */

.clients {
  background: var(--color-surface);
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.clients__label {
  text-align: center;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-8);
}

.clients__grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--space-4);
}

@media (max-width: 1024px) {
  .clients__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
  }
}

@media (max-width: 600px) {
  .clients__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
}

.client-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-4) var(--space-2);
  border-radius: var(--radius-md);
  transition: background 0.25s ease;
}

.client-item:hover {
  background: var(--color-primary-light);
}

.client-item__name {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin-bottom: var(--space-1);
}

.client-item__type {
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-text-faint);
  letter-spacing: 0.02em;
}

/* ========================================================
   CONTACT
   ======================================================== */

.contact { background: var(--color-bg); }

.contact__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 768px) {
  .contact__layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.contact__info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.contact__info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.contact__info-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.contact__info-icon svg {
  width: 18px;
  height: 18px;
}

.contact__info-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 2px;
}

.contact__info-value {
  font-size: var(--text-sm);
  color: var(--color-text);
}

.contact__info-value a {
  color: var(--color-accent);
  text-decoration: none;
}

.contact__info-value a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-group { display: flex; flex-direction: column; gap: var(--space-1); }

.form-group label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px oklch(from var(--color-accent) l c h / 0.1);
}

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

.form-group--checkbox { flex-direction: row; align-items: flex-start; }

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  margin-top: 3px;
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  accent-color: var(--color-accent);
}

.checkbox-label a {
  color: var(--color-accent);
  text-decoration: underline;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  background: var(--color-primary);
  color: #ffffff;
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  letter-spacing: 0.02em;
  align-self: flex-start;
}

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

/* ========================================================
   FOOTER
   ======================================================== */

.footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.6);
  padding-block: var(--space-8);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__copy {
  font-size: var(--text-xs);
}

.footer__links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.footer__links a {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  text-decoration: none;
}

.footer__links a:hover {
  color: rgba(255,255,255,0.8);
}

/* ========================================================
   SCROLL ANIMATIONS
   ======================================================== */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================================
   IMPRESSUM MODAL
   ======================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: var(--space-4);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  max-width: 640px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  padding: var(--space-8);
  position: relative;
}

.modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.modal__close:hover {
  background: var(--color-primary-light);
  color: var(--color-text);
}

.modal h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-6);
}

.modal h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.modal p, .modal li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-2);
}