/* ===========================
   PlexConcert — Styles
   Tech-focused, clean & minimal
   =========================== */

/* --- Custom Properties --- */
:root {
  --color-dark: #0F172A;
  --color-dark-2: #1E293B;
  --color-mid: #475569;
  --color-light: #94A3B8;
  --color-subtle: #F1F5F9;
  --color-white: #FFFFFF;
  --color-accent: #F59E0B;
  --color-accent-hover: #D97706;
  --color-accent-light: rgba(245, 158, 11, 0.1);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3.5rem;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 5rem;
  --spacing-3xl: 8rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 10px 40px rgba(15, 23, 42, 0.12);

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  --max-width: 1200px;
  --nav-height: 72px;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  color: var(--color-dark);
  background: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* --- Scroll Progress Bar --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
  width: 0%;
  z-index: 1001;
  transition: width 0.1s linear;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
  z-index: 1000;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-logo .plex {
  color: var(--color-dark);
}

.nav-logo .concert {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-mid);
  transition: color var(--transition-fast);
  letter-spacing: 0.01em;
}

.nav-links a:hover {
  color: var(--color-dark);
}

.nav-cta {
  background: var(--color-dark);
  color: var(--color-white) !important;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-cta:hover {
  background: var(--color-dark-2);
  transform: translateY(-1px);
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Language Picker --- */
.lang-picker {
  position: relative;
  margin-left: var(--spacing-sm);
}

.lang-picker-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: 1px solid var(--color-light);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.6rem;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-mid);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.lang-picker-btn:hover {
  color: var(--color-dark);
  border-color: var(--color-dark);
}

.lang-picker-btn svg {
  transition: transform var(--transition-fast);
}

.lang-picker-menu.open + .lang-picker-btn svg,
.lang-picker-btn:focus + .lang-picker-menu svg {
  transform: rotate(180deg);
}

.lang-picker-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--color-white);
  border: 1px solid var(--color-subtle);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  list-style: none;
  margin: 0;
  padding: 0.3rem 0;
  padding-left: 0;
  min-width: 120px;
  z-index: 1001;
}

.lang-picker-menu li {
  list-style: none;
  margin: 0;
  padding: 0;
}

.lang-picker-menu.open {
  display: block;
}

.lang-option {
  display: block;
  width: 100%;
  padding: 0.5rem 1rem;
  background: none;
  border: none;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-mid);
  cursor: pointer;
  text-align: left;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.lang-option:hover {
  background: var(--color-subtle);
  color: var(--color-dark);
}

.lang-option.active {
  color: var(--color-accent);
  font-weight: 600;
}

/* Scrolled nav — dark mode picker */
.nav.scrolled .lang-picker-btn {
  color: var(--color-mid);
}

/* --- Utility Classes --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-dark);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-mid);
  max-width: 600px;
  line-height: 1.7;
}

.text-center {
  text-align: center;
}

.text-center .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  letter-spacing: 0.01em;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--color-dark);
  border: 1.5px solid rgba(15, 23, 42, 0.15);
}

.btn-secondary:hover {
  border-color: var(--color-dark);
  transform: translateY(-2px);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-dark);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  overflow: hidden;
  background: var(--color-dark);
}

.hero canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--nav-height) + var(--spacing-xl)) var(--spacing-lg) var(--spacing-xl);
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--color-accent);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
}

.hero h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.1;
  letter-spacing: -0.04em;
  max-width: 700px;
  margin-bottom: var(--spacing-md);
}

.hero h1 .highlight {
  color: var(--color-accent);
}

.hero-text {
  font-size: var(--font-size-lg);
  color: var(--color-light);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-stat-number {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-white);
}

.hero-stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-light);
  margin-top: 0.25rem;
}

/* --- Services Section --- */
.services {
  background: var(--color-white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.service-card {
  background: var(--color-white);
  border: 1px solid rgba(15, 23, 42, 0.06);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: default;
}

.service-card:hover {
  transform: translateY(-4px) perspective(600px) rotateX(2deg) rotateY(-2deg);
  box-shadow: var(--shadow-lg);
}

.service-card.featured {
  border-color: rgba(245, 158, 11, 0.2);
  background: linear-gradient(135deg, var(--color-white), rgba(245, 158, 11, 0.03));
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  background: var(--color-subtle);
}

.service-card.featured .service-icon {
  background: var(--color-accent-light);
}

.service-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-dark);
}

.service-card p {
  font-size: var(--font-size-sm);
  color: var(--color-mid);
  line-height: 1.6;
}

.service-tag {
  display: inline-block;
  margin-top: var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- How It Works Section --- */
.how-it-works {
  background: var(--color-subtle);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  position: relative;
}

/* Connector line between steps */
.steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: calc(16.66% + 24px);
  right: calc(16.66% + 24px);
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-accent) 0,
    var(--color-accent) 8px,
    transparent 8px,
    transparent 16px
  );
  z-index: 0;
}

.step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-white);
  border: 2px solid var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 auto var(--spacing-md);
}

.step h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.step p {
  font-size: var(--font-size-sm);
  color: var(--color-mid);
  line-height: 1.6;
  max-width: 280px;
  margin: 0 auto;
}

/* --- Testimonials Section (Dark / Inverted) --- */
.testimonials {
  background: linear-gradient(135deg, var(--color-dark), var(--color-dark-2));
  color: var(--color-white);
}

.testimonials .section-label {
  color: var(--color-accent);
}

.testimonials .section-title {
  color: var(--color-white);
}

.testimonials .section-subtitle {
  color: var(--color-light);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.testimonial-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  transition: transform var(--transition-base), background var(--transition-base);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.07);
}

.testimonial-stars {
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-md);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(245, 158, 11, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-accent);
}

.testimonial-name {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.testimonial-role {
  font-size: 0.75rem;
  color: var(--color-light);
}

/* --- About Section --- */
.about {
  background: var(--color-white);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  margin-top: var(--spacing-xl);
}

.about-text p {
  color: var(--color-mid);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.about-text p:first-of-type {
  font-size: var(--font-size-lg);
  color: var(--color-dark);
}

.about-visual {
  background: var(--color-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

.about-stat-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.about-stat-value {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-dark);
}

.about-stat-desc {
  font-size: var(--font-size-sm);
  color: var(--color-mid);
}

/* --- Contact Section --- */
.contact {
  background: var(--color-subtle);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-xl);
}

.contact-info h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.contact-info p {
  color: var(--color-mid);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-mid);
}

.contact-detail-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.contact-form {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-dark);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid rgba(15, 23, 42, 0.1);
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  color: var(--color-dark);
  background: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.contact-form .btn {
  width: 100%;
  justify-content: center;
  padding: 0.9rem;
}

/* Honeypot — invisible to humans, catches bots */
.form-honeypot {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

/* Form status messages */
.form-status {
  margin-top: var(--spacing-sm);
  font-size: 0.95rem;
  min-height: 1.4em;
}

.form-status--success {
  color: var(--color-accent);
}

.form-status--error {
  color: #ef4444;
}

/* Obfuscated email link */
#contact-email {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

#contact-email:hover {
  color: var(--color-accent);
}

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  color: var(--color-light);
  padding: var(--spacing-xl) 0;
}

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

.footer-logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.footer-logo .plex {
  color: var(--color-white);
}

.footer-logo .concert {
  color: var(--color-accent);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-light);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-copy {
  font-size: var(--font-size-sm);
  color: var(--color-mid);
}

/* --- Scroll Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Staggered children animation */
.stagger-children .fade-up:nth-child(1) { transition-delay: 0s; }
.stagger-children .fade-up:nth-child(2) { transition-delay: 0.1s; }
.stagger-children .fade-up:nth-child(3) { transition-delay: 0.2s; }
.stagger-children .fade-up:nth-child(4) { transition-delay: 0.3s; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero h1 {
    font-size: var(--font-size-3xl);
  }

  .about-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-4xl: 2.5rem;
    --font-size-3xl: 2rem;
    --font-size-2xl: 1.5rem;
    --spacing-3xl: 5rem;
  }

  /* Mobile Nav */
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-sm);
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .lang-picker {
    margin-left: auto;
    margin-right: var(--spacing-sm);
  }

  /* Hero */
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    justify-content: center;
  }

  /* Services */
  .services-grid {
    grid-template-columns: 1fr;
  }

  /* Steps */
  .steps {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .steps::before {
    display: none;
  }

  /* Testimonials */
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-inner {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}