/* ===========================================
   KLANGWALD FESTIVAL – Stylesheet
   ===========================================
   Inhaltsverzeichnis:
   1. CSS Custom Properties (Variablen)
   2. Reset & Basis-Styles
   3. Typografie
   4. Layout-Utilities
   5. Buttons
   6. Navigation
   7. Hero Section
   8. Line-up Section
   9. Programm Section
   10. Tickets Section
   11. Info Section
   12. Newsletter Section
   13. Footer
   14. Animationen
   15. Media Queries (Responsive)
   =========================================== */

/* ===========================================
   1. CSS CUSTOM PROPERTIES
   Hier können Farben, Schriftarten und Abstände
   zentral angepasst werden.
   =========================================== */
:root {
  /* Farben */
  --color-primary: #6C3CE1;       /* Violett – Hauptfarbe */
  --color-primary-light: #8B5CF6;
  --color-primary-dark: #4C1D95;
  --color-accent: #F59E0B;        /* Gold – Akzentfarbe */
  --color-accent-light: #FBBF24;

  --color-bg: #0F0F14;            /* Dunkler Hintergrund */
  --color-bg-light: #1A1A24;      /* Etwas hellerer Hintergrund */
  --color-bg-card: #222233;       /* Karten-Hintergrund */

  --color-text: #E8E8F0;          /* Haupttext */
  --color-text-muted: #9999AA;    /* Gedämpfter Text */
  --color-text-heading: #FFFFFF;  /* Überschriften */

  --color-border: #333344;        /* Rahmenfarbe */

  /* Schriftarten */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Abstände */
  --spacing-xs: 0.5rem;    /* 8px */
  --spacing-sm: 1rem;      /* 16px */
  --spacing-md: 1.5rem;    /* 24px */
  --spacing-lg: 2.5rem;    /* 40px */
  --spacing-xl: 4rem;      /* 64px */
  --spacing-2xl: 6rem;     /* 96px */

  /* Rundungen */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Schatten */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(108, 60, 225, 0.3);

  /* Übergänge */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Container */
  --container-max: 1200px;
  --container-padding: 1.5rem;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

ul {
  list-style: none;
}

/* ===========================================
   3. TYPOGRAFIE
   =========================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text-heading);
  font-weight: 700;
  line-height: 1.2;
}

.section__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  text-align: center;
  margin-bottom: var(--spacing-xs);
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===========================================
   4. LAYOUT-UTILITIES
   =========================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--spacing-2xl) 0;
}

/* ===========================================
   5. BUTTONS
   =========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  gap: 0.5rem;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  box-shadow: var(--shadow-glow);
  color: #fff;
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-heading);
  border-color: var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
  transform: translateY(-2px);
}

/* ===========================================
   6. NAVIGATION
   =========================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: background-color var(--transition-base), padding var(--transition-base);
}

.navbar--scrolled {
  background-color: rgba(15, 15, 20, 0.95);
  backdrop-filter: blur(10px);
  padding: 0.6rem 0;
  box-shadow: var(--shadow-sm);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-heading);
  letter-spacing: 0.1em;
}

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

.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.navbar__link {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.navbar__link:hover {
  color: var(--color-text-heading);
}

.navbar__link--cta {
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
}

.navbar__link--cta:hover {
  background: var(--color-primary-light);
  color: #fff;
}

/* Hamburger Toggle */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.navbar__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-heading);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ===========================================
   7. HERO SECTION
   =========================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;

  /* TODO: Hintergrundbild hier einfügen */
  background: linear-gradient(
    135deg,
    var(--color-bg) 0%,
    var(--color-primary-dark) 50%,
    var(--color-bg) 100%
  );
  /* Falls ein Bild verwendet wird:
  background-image: url('../img/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  */
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    rgba(108, 60, 225, 0.15) 0%,
    rgba(15, 15, 20, 0.8) 70%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__date {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}

.hero__title {
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(180deg, #fff 40%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--color-text-muted);
  max-width: 500px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* Countdown */
.hero__countdown {
  position: relative;
  z-index: 1;
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.countdown__item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.countdown__number {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--color-text-heading);
}

.countdown__label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ===========================================
   8. LINE-UP SECTION
   =========================================== */
.lineup {
  background-color: var(--color-bg);
}

.lineup__tier {
  margin-bottom: var(--spacing-xl);
}

.lineup__tier-label {
  font-size: 1.2rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.lineup__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-md);
}

.lineup__grid--headliner {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.artist-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.artist-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.artist-card__image {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--color-bg-light);
}

.artist-card--large .artist-card__image {
  aspect-ratio: 16 / 10;
}

.artist-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  background: linear-gradient(135deg, var(--color-bg-light), var(--color-bg-card));
}

.artist-card__info {
  padding: var(--spacing-sm);
}

.artist-card__name {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.artist-card__genre {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.lineup__more {
  text-align: center;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--spacing-md);
}

/* ===========================================
   9. PROGRAMM SECTION
   =========================================== */
.programm {
  background-color: var(--color-bg-light);
}

.programm__tabs {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.programm__tab {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.7rem 1.5rem;
  background: transparent;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-base);
}

.programm__tab:hover {
  border-color: var(--color-primary-light);
  color: var(--color-text-heading);
}

.programm__tab--active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* Tages-Container */
.programm__day {
  display: none;
  max-width: 700px;
  margin: 0 auto;
}

.programm__day--active {
  display: block;
}

.programm__event {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.programm__event:last-child {
  border-bottom: none;
}

.programm__event--highlight {
  background: rgba(108, 60, 225, 0.1);
  margin: 0 calc(var(--spacing-sm) * -1);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  border-bottom: none;
}

.programm__time {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  min-width: 70px;
}

.programm__act {
  font-size: 1.05rem;
  font-weight: 600;
}

.programm__stage {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.programm__badge {
  display: inline-block;
  margin-top: 0.3rem;
  padding: 0.2rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===========================================
   10. TICKETS SECTION
   =========================================== */
.tickets {
  background-color: var(--color-bg);
}

.tickets__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  align-items: start;
}

.ticket-card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.ticket-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.ticket-card--featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
  transform: scale(1.03);
}

.ticket-card--featured:hover {
  transform: scale(1.03) translateY(-4px);
}

.ticket-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.3rem 1rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ticket-card__title {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-sm);
}

.ticket-card__price {
  margin-bottom: var(--spacing-md);
}

.ticket-card__amount {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text-heading);
}

.ticket-card__period {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.ticket-card__features {
  text-align: left;
  margin-bottom: var(--spacing-lg);
}

.ticket-card__features li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  color: var(--color-text);
}

.ticket-card__features li::before {
  content: '✓ ';
  color: var(--color-primary-light);
  font-weight: 700;
}

.ticket-card__features li:last-child {
  border-bottom: none;
}

.ticket-card__btn {
  width: 100%;
}

/* ===========================================
   11. INFO SECTION
   =========================================== */
.info {
  background-color: var(--color-bg-light);
}

.info__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.info__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: transform var(--transition-base);
}

.info__card:hover {
  transform: translateY(-2px);
}

.info__icon {
  margin-bottom: var(--spacing-sm);
}

.info__icon-placeholder {
  font-size: 2rem;
}

.info__card-title {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xs);
}

.info__card-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.info__link {
  display: inline-block;
  margin-top: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-primary-light);
}

/* ===========================================
   12. NEWSLETTER SECTION
   =========================================== */
.newsletter {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  text-align: center;
}

.newsletter__inner {
  max-width: 600px;
}

.newsletter__title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  color: #fff;
  margin-bottom: var(--spacing-xs);
}

.newsletter__text {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-md);
}

.newsletter__form {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
}

.newsletter__input {
  flex: 1;
  padding: 0.85rem 1.2rem;
  font-size: 1rem;
  font-family: var(--font-body);
  background: rgba(255, 255, 255, 0.15);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  color: #fff;
  outline: none;
  transition: border-color var(--transition-fast);
}

.newsletter__input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.newsletter__input:focus {
  border-color: var(--color-accent);
}

.newsletter__btn {
  white-space: nowrap;
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

.newsletter__btn:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
}

.newsletter__hint {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ===========================================
   13. FOOTER
   =========================================== */
.footer {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
}

.footer__brand {
  flex: 1;
  min-width: 200px;
}

.footer__logo {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-heading);
  letter-spacing: 0.1em;
}

.footer__tagline {
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
  font-size: 0.9rem;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
}

.footer__heading {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-heading);
  margin-bottom: var(--spacing-sm);
}

.footer__column a {
  display: block;
  padding: 0.3rem 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer__column a:hover {
  color: var(--color-text-heading);
}

.footer__bottom {
  width: 100%;
  padding-top: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ===========================================
   14. ANIMATIONEN
   =========================================== */

/* Scroll-Animation: Elemente einblenden */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ===========================================
   15. MEDIA QUERIES (Responsive)
   =========================================== */

/* Tablet */
@media (max-width: 768px) {
  /* Navigation: Hamburger-Menü */
  .navbar__toggle {
    display: flex;
  }

  .navbar__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem var(--spacing-lg) var(--spacing-lg);
    gap: var(--spacing-sm);
    transition: right var(--transition-base);
    box-shadow: var(--shadow-lg);
  }

  .navbar__menu--open {
    right: 0;
  }

  .navbar__link--cta {
    margin-top: var(--spacing-sm);
  }

  /* Hero */
  .hero__countdown {
    gap: var(--spacing-md);
  }

  /* Tickets */
  .ticket-card--featured {
    transform: none;
  }

  .ticket-card--featured:hover {
    transform: translateY(-4px);
  }

  /* Newsletter */
  .newsletter__form {
    flex-direction: column;
  }

  /* Footer */
  .footer__inner {
    flex-direction: column;
    gap: var(--spacing-lg);
  }
}

/* Mobile */
@media (max-width: 480px) {
  :root {
    --container-padding: 1rem;
  }

  .section {
    padding: var(--spacing-xl) 0;
  }

  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

  .hero__countdown {
    gap: var(--spacing-sm);
  }

  .lineup__grid--headliner {
    grid-template-columns: 1fr;
  }

  .programm__tabs {
    flex-direction: column;
    align-items: center;
  }

  .programm__tab {
    width: 100%;
    text-align: center;
  }
}