/*
 * kunstkurse.art — Design System: Curated Canvas
 * Base visual style: Gallery Minimalist (Minimalism & Editorial Design)
 */

@import url('https://fonts.googleapis.com/css2?family=Libre+Caslon+Text:ital,wght@0,400;0,700;1,400&family=Hanken+Grotesk:wght@300;400;500;600;700&display=swap');

/* --- Design Tokens & Variables --- */
:root {
  /* Colors */
  --color-gallery-white: #FFFFFF;
  --color-sand-light: #F9F8F6;
  --color-anthracite: #1A1A1A;
  --color-terracotta-accent: #A62A00;
  
  --color-surface: #F9F9F9;
  --color-surface-dim: #DADADA;
  --color-surface-bright: #F9F9F9;
  --color-surface-container-lowest: #FFFFFF;
  --color-surface-container-low: #F3F3F3;
  --color-surface-container: #EEEEEE;
  --color-surface-container-high: #E8E8E8;
  --color-surface-container-highest: #E2E2E2;
  
  --color-primary: #0B0C0C;
  --color-on-primary: #FFFFFF;
  --color-secondary: #635E53;
  --color-on-secondary: #FFFFFF;
  --color-secondary-container: #E7DFD1;
  --color-on-secondary-container: #676257;
  
  --color-on-surface: #1A1C1C;
  --color-on-surface-variant: #444748;
  --color-outline: #747878;
  --color-outline-variant: #C4C7C7;
  
  /* Layout & Spacing */
  --spacing-unit: 8px;
  --container-max-width: 1280px;
  --gutter: 32px;
  
  --margin-desktop: 64px;
  --margin-tablet: 32px;
  --margin-mobile: 20px;
  
  /* Typography */
  --font-serif: 'Libre Caslon Text', Georgia, serif;
  --font-sans: 'Hanken Grotesk', system-ui, -apple-system, sans-serif;
  
  /* Transition Defaults */
  --transition-speed: 0.3s;
  --transition-ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Dark Mode Variables */
@media (prefers-color-scheme: dark) {
  :root {
    --color-gallery-white: #1A1A1A;
    --color-sand-light: #232221;
    --color-anthracite: #F9F8F6;
    --color-surface: #202020;
    --color-surface-container-lowest: #151515;
    --color-surface-container-low: #1C1B1A;
    --color-surface-container: #232221;
    --color-surface-container-high: #2C2B2A;
    --color-surface-container-highest: #353433;
    
    --color-primary: #F9F8F6;
    --color-on-primary: #1A1A1A;
    --color-on-surface: #F1F1F1;
    --color-on-surface-variant: #C4C7C7;
    --color-outline: #8C8987;
    --color-outline-variant: #484645;
  }
}

/* --- Base Resets & Global Styles --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-sand-light);
  color: var(--color-primary);
  line-height: 1.5;
  overflow-x: hidden;
  transition: background-color var(--transition-speed) var(--transition-ease),
              color var(--transition-speed) var(--transition-ease);
}

/* Selection Highlight */
::selection {
  background-color: var(--color-terracotta-accent);
  color: #FFFFFF;
}

/* --- Typography System --- */
.display-lg {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4rem); /* Responsive scaling up to 64px */
  font-weight: 400;
  line-height: 1.125;
  letter-spacing: -0.02em;
}

.headline-lg {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.5vw, 3rem); /* Responsive scaling up to 48px */
  font-weight: 400;
  line-height: 1.16;
}

.headline-md {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3.5vw, 2rem); /* Responsive scaling up to 32px */
  font-weight: 400;
  line-height: 1.25;
}

.headline-sm {
  font-family: var(--font-serif);
  font-size: 1.5rem; /* 24px */
  font-weight: 400;
  line-height: 1.33;
}

.body-lg {
  font-family: var(--font-sans);
  font-size: 1.125rem; /* 18px */
  font-weight: 400;
  line-height: 1.55;
}

.body-md {
  font-family: var(--font-sans);
  font-size: 1rem; /* 16px */
  font-weight: 400;
  line-height: 1.5;
}

.label-md {
  font-family: var(--font-sans);
  font-size: 0.875rem; /* 14px */
  font-weight: 600;
  line-height: 1.42;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.label-sm {
  font-family: var(--font-sans);
  font-size: 0.75rem; /* 12px */
  font-weight: 500;
  line-height: 1.33;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* --- Layout & Grid System --- */
.container {
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--margin-mobile);
  padding-right: var(--margin-mobile);
  width: 100%;
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--margin-tablet);
    padding-right: var(--margin-tablet);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--margin-desktop);
    padding-right: var(--margin-desktop);
  }
}

.grid-cols-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

/* Custom spacing utilities */
.py-section {
  padding-top: clamp(4rem, 8vw, 8rem);
  padding-bottom: clamp(4rem, 8vw, 8rem);
}

/* --- Component Styles --- */

/* Shape Language: Strictly sharp corners (border-radius: 0) */
.btn, .input, .card, .textarea, .chip {
  border-radius: 0 !important;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 0.875rem; /* label-md */
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 1.25rem 2rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-speed) var(--transition-ease);
  text-decoration: none;
  width: 100%;
}

@media (min-width: 640px) {
  .btn {
    width: auto;
  }
}

.btn-primary {
  background-color: var(--color-anthracite);
  color: var(--color-gallery-white);
}

.btn-primary:hover {
  background-color: var(--color-terracotta-accent);
  color: #FFFFFF;
}

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

.btn-secondary:hover {
  background-color: rgba(0, 0, 0, 0.04);
}

@media (prefers-color-scheme: dark) {
  .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.04);
  }
}

/* Image Matting / Gallery Frame */
.gallery-matting {
  padding: clamp(1rem, 4vw, 2.5rem);
  background-color: var(--color-surface-container-low);
  border: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  justify-content: center;
  align-items: center;
}

@media (prefers-color-scheme: dark) {
  .gallery-matting {
    border: 1px solid rgba(255, 255, 255, 0.05);
  }
}

.gallery-matting img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: filter 0.7s ease, transform 0.7s ease;
}

.gallery-matting:hover img {
  transform: scale(1.02);
}

/* Ghost Borders for Cards & Items */
.ghost-border {
  border: 1px solid rgba(26, 26, 26, 0.1);
  transition: border-color var(--transition-speed) var(--transition-ease);
}

@media (prefers-color-scheme: dark) {
  .ghost-border {
    border: 1px solid rgba(249, 248, 246, 0.1);
  }
}

.ghost-border:hover {
  border-color: var(--color-primary);
}

/* Inputs & Form Elements */
.form-group {
  position: relative;
  margin-bottom: 2.5rem;
}

.input-label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem; /* label-sm */
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
  opacity: 0.6;
  transition: opacity var(--transition-speed);
}

.input-field {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(26, 26, 26, 0.2);
  padding: 0.5rem 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-primary);
  outline: none;
  transition: border-color var(--transition-speed);
}

@media (prefers-color-scheme: dark) {
  .input-field {
    border-bottom: 1px solid rgba(249, 248, 246, 0.2);
  }
}

.input-field:focus {
  border-bottom: 1px solid var(--color-terracotta-accent);
}

.form-group:focus-within .input-label {
  opacity: 1;
  color: var(--color-terracotta-accent);
}

/* Chips / Filter Buttons */
.chip {
  background-color: transparent;
  border: 1px solid rgba(26, 26, 26, 0.15);
  color: var(--color-primary);
  font-family: var(--font-sans);
  font-size: 0.75rem; /* label-sm */
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: all var(--transition-speed);
}

@media (prefers-color-scheme: dark) {
  .chip {
    border: 1px solid rgba(249, 248, 246, 0.15);
  }
}

.chip:hover {
  border-color: var(--color-primary);
}

.chip.active {
  background-color: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
  border-color: var(--color-secondary-container);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background-color: var(--color-surface-container-lowest);
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  border: 1px solid rgba(26, 26, 26, 0.15);
  position: relative;
  transform: translateY(20px);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@media (prefers-color-scheme: dark) {
  .modal-container {
    border: 1px solid rgba(249, 248, 246, 0.15);
  }
}

.modal-overlay.active .modal-container {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: transparent;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s;
  z-index: 10;
}

.modal-close:hover {
  opacity: 1;
}

/* Scroll Bar Styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-sand-light);
}

::-webkit-scrollbar-thumb {
  background: var(--color-surface-dim);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-outline);
}

/* --- Header / Navigation --- */
.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  background-color: rgba(249, 248, 246, 0.9);
  backdrop-filter: blur(10px);
  border-b: 1px solid rgba(26, 26, 26, 0.08);
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--margin-mobile);
  transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

@media (min-width: 768px) {
  .header-nav {
    padding: 0 var(--margin-tablet);
  }
}

@media (min-width: 1024px) {
  .header-nav {
    padding: 0 var(--margin-desktop);
  }
}

@media (prefers-color-scheme: dark) {
  .header-nav {
    background-color: rgba(26, 26, 26, 0.9);
    border-bottom: 1px solid rgba(249, 248, 246, 0.08);
  }
}

.nav-links-desktop {
  display: none;
}

@media (min-width: 1024px) {
  .nav-links-desktop {
    display: flex;
    gap: 2.5rem;
  }
  
  .nav-links-desktop a {
    color: var(--color-primary);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.75rem; /* label-sm */
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    padding-bottom: 4px;
  }
  
  .nav-links-desktop a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--color-terracotta-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s var(--transition-ease);
  }
  
  .nav-links-desktop a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
  }
  
  .nav-links-desktop a.active::after {
    transform: scaleX(1);
  }
}

/* Mobile Drawer */
.drawer-nav {
  position: fixed;
  inset-y: 0;
  left: 0;
  width: 80%;
  max-width: 360px;
  background-color: var(--color-sand-light);
  z-index: 110;
  transform: translateX(-100%);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  padding: 2.5rem var(--margin-mobile);
  display: flex;
  flex-col: column;
  flex-direction: column;
  border-right: 1px solid rgba(26, 26, 26, 0.1);
}

@media (prefers-color-scheme: dark) {
  .drawer-nav {
    border-right: 1px solid rgba(249, 248, 246, 0.1);
  }
}

.drawer-nav.active {
  transform: translateX(0);
}

.drawer-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  z-index: 105;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s, visibility 0.4s;
}

.drawer-overlay.active {
  opacity: 1;
  visibility: visible;
}

.drawer-links {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 4rem;
}

.drawer-links a {
  color: var(--color-primary);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 1.125rem; /* body-lg */
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: padding-left 0.3s;
}

.drawer-links a:hover {
  padding-left: 8px;
  color: var(--color-terracotta-accent);
}

/* --- Section Animations --- */
.reveal-section {
  /* Standardmäßig voll sichtbar für Robustheit (Progressive Enhancement) */
  opacity: 1;
  transform: none;
  transition: opacity 0.8s var(--transition-ease), transform 0.8s var(--transition-ease);
}

/* Nur wenn JavaScript aktiv ist und der Observer läuft, initial ausblenden */
.js-reveal-enabled .reveal-section {
  opacity: 0;
  transform: translateY(30px);
}

.js-reveal-enabled .reveal-section.active {
  opacity: 1;
  transform: translateY(0);
}

/* Custom Utilities for Flex & Grid Alignment */
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Custom Testimonial Slider / Scroller */
.testimonial-scroller {
  display: flex;
  gap: 2rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none; /* Firefox */
}

.testimonial-scroller::-webkit-scrollbar {
  display: none; /* Safari & Chrome */
}

.testimonial-card {
  min-width: 85%;
  background-color: var(--color-surface-container-lowest);
  padding: clamp(2rem, 5vw, 3.5rem);
  scroll-snap-align: start;
}

@media (min-width: 768px) {
  .testimonial-card {
    min-width: 45%;
  }
}

.hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* ==========================================================
   RECHTLICHE SEITEN
   impressum.html / datenschutz.html
   ========================================================== */

.legal-page {
    min-height: 100vh;
    background: var(--color-bg, #faf8f5);
}

.legal-hero {
    padding: 8rem 0 3rem;
    text-align: center;
    border-bottom: 1px solid rgba(0,0,0,.08);
}

.legal-hero h1 {
    margin: 0;
    font-family: "Libre Caslon Text", serif;
    font-size: clamp(2.4rem,5vw,4rem);
    font-weight: 400;
    line-height: 1.15;
}

.legal-hero p {
    margin: 1rem auto 0;
    max-width: 700px;
    font-size: 1.1rem;
    opacity: .75;
}

.legal-content {
    padding: 4rem 0 6rem;
}

.legal-content .container {
    max-width: 850px;
}

.legal-content h2 {
    margin: 3rem 0 1rem;
    font-family: "Libre Caslon Text", serif;
    font-size: 1.7rem;
    font-weight: 400;
    color: var(--color-accent, #6c4f3d);
}

.legal-content p,
.legal-content li {
    font-size: 1.05rem;
    line-height: 1.85;
}

.legal-content p {
    margin: 0 0 1.25rem;
}

.legal-content ul {
    margin: .75rem 0 1.5rem 1.4rem;
}

.legal-content li {
    margin-bottom: .45rem;
}

.legal-content strong {
    font-weight: 600;
}

.legal-content a {
    color: var(--color-accent, #6c4f3d);
    text-decoration: none;
    transition: opacity .25s ease;
}

.legal-content a:hover {
    opacity: .7;
    text-decoration: underline;
}

.legal-note {
    padding: 1rem 1.25rem;
    margin: 2rem 0;
    border-left: 4px solid var(--color-accent, #6c4f3d);
    background: rgba(0,0,0,.04);
    border-radius: .4rem;
    font-size: .95rem;
}

.footer-nav {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-nav li {
    margin: .45rem 0;
}

.footer-nav a {
    text-decoration: none;
}

.footer-nav a:hover {
    text-decoration: underline;
}

.form-privacy {
    margin-top: 1rem;
    font-size: .92rem;
    line-height: 1.6;
    opacity: .75;
}

.form-privacy a {
    text-decoration: underline;
}

@media (max-width: 900px) {

    .legal-hero {
        padding-top: 6.5rem;
    }

    .legal-content {
        padding: 3rem 0 4rem;
    }

    .legal-content h2 {
        font-size: 1.45rem;
    }

}

@media (prefers-color-scheme: dark) {

    .legal-page {
        background: #161616;
    }

    .legal-hero {
        border-color: rgba(255,255,255,.08);
    }

    .legal-content a {
        color: #dcb48b;
    }

    .legal-note {
        background: rgba(255,255,255,.06);
        border-left-color: #dcb48b;
    }

}

#whitebg {
    background-color: #fff; !important;
}