/* ===== CSS Custom Properties ===== */
:root {
  --color-primary: #1d1d1f;
  --color-primary-light: #333336;
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-accent-glow: rgba(0, 113, 227, 0.3);
  --color-text: #424245;
  --color-text-light: #6e6e73;
  --color-text-white: #f5f5f7;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f5f7;
  --color-bg-dark: #1d1d1f;
  --color-border: #d2d2d7;
  --color-card-bg: #ffffff;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 40px -5px rgba(0, 0, 0, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.06);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 14px 0;
  background: #ffffff;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  transition: padding var(--transition);
}

.navbar.scrolled {
  padding: 10px 0;
}

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

.navbar-brand img {
  height: 36px;
  width: auto;
  transition: transform var(--transition);
}

.navbar-brand:hover img {
  transform: scale(1.03);
}

.navbar-nav {
  display: flex;
  list-style: none;
  gap: 8px;
}

.navbar-nav a {
  display: block;
  padding: 8px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.navbar-nav a:hover {
  color: var(--color-accent);
  background: transparent;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
}

.lang-btn {
  background: none;
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-sans);
  color: var(--color-text-light);
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition);
}

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

.lang-btn.active {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

/* Hamburger Menu */
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.navbar-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  margin: 6px 0;
  transition: all var(--transition);
  border-radius: 2px;
}

@media (max-width: 768px) {
  .navbar-toggle {
    display: block;
  }

  .navbar-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    background: var(--color-bg);
    padding: 100px 32px 32px;
    gap: 4px;
    transition: right var(--transition);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
  }

  .navbar-nav.active {
    right: 0;
  }

  .navbar-nav a {
    color: var(--color-primary) !important;
    font-size: 1rem;
    padding: 14px 20px;
  }

  .navbar-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
  }

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

  .navbar-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
  }

}

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

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

/* ===== Slideshow (in Features) ===== */
.slideshow-container {
  position: relative;
  width: 85%;
  max-width: 1100px;
  margin: -280px auto 80px;
  aspect-ratio: 16/9;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: 3;
}

@media (max-width: 768px) {
  .slideshow-container {
    width: 90%;
    margin-top: -50px;
  }
}

.hero-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.hero-slide.active {
  opacity: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 41, 59, 0.7) 50%, rgba(59, 130, 246, 0.3) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 120px 24px 80px;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 100px;
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.hero h1 {
  font-size: clamp(3rem, 7vw, 5rem);
  color: var(--color-text-white);
  margin-bottom: 32px;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--color-accent), #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: rgba(248, 250, 252, 0.6);
  max-width: 650px;
  margin: 0 auto;
  line-height: 1.8;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: var(--color-accent);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  box-shadow: 0 4px 15px var(--color-accent-glow);
}

.hero-cta:hover {
  background: var(--color-accent-hover);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--color-accent-glow);
}

.hero-cta svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition);
}

.hero-cta:hover svg {
  transform: translateX(4px);
}

/* ===== Section Styles ===== */
.section {
  padding: 140px 0;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 80px;
}

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.section-header h2 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  margin-bottom: 24px;
}

.section-header p {
  font-size: 1.25rem;
  color: var(--color-text-light);
  line-height: 1.7;
}


/* ===== Competencies / Features ===== */
.features {
  background: var(--color-bg-alt);
  padding-top: 0;
  padding-bottom: 140px;
}

.features-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.feature-row {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 48px 0;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.feature-row:last-child {
  border-bottom: none;
}

.feature-number {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-accent), #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  min-width: 80px;
  flex-shrink: 0;
}

.feature-line {
  width: 40px;
  height: 2px;
  background: var(--color-border);
  margin-top: 20px;
  flex-shrink: 0;
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1), background 0.6s ease;
}

.feature-row.visible .feature-line {
  width: 60px;
  background: var(--color-accent);
}

.feature-body h3 {
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.feature-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
  white-space: nowrap;
}

.feature-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(0, 113, 227, 0.05);
}

@media (max-width: 600px) {
  .feature-row {
    flex-direction: column;
    gap: 16px;
    padding: 36px 0;
  }

  .feature-number {
    font-size: 2.5rem;
  }

  .feature-line {
    display: none;
  }

  .feature-body h3 {
    font-size: 1.4rem;
  }
}

/* ===== Technology Logos ===== */
.tech-logos {
  background: var(--color-bg-alt);
  padding: 80px 0;
}

.tech-logos-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 32px;
  align-items: center;
}

.tech-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 1;
  transition: all var(--transition);
}

.tech-logo:hover {
  transform: scale(1.05);
}

.tech-logo img {
  max-height: 48px;
  width: auto;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .tech-logos-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .tech-logos-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== Customers / References ===== */
.customers {
  background: var(--color-bg);
}

.customers-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.customer-row {
  text-align: left;
  padding: 14px 0;
}

.customer-name {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-block;
}

.customer-name .first-char {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-accent);
}

.customer-name .char {
  opacity: 0;
  display: inline-block;
  transition: opacity 0.3s ease, transform 0.3s ease;
  transform: translateX(-8px);
}

.customer-row.visible .char {
  opacity: 1;
  transform: translateX(0);
}

.customer-row:hover .customer-name {
  color: var(--color-accent);
}

.customer-row.scroll-card {
  opacity: 1;
}

.customer-row.scroll-card.visible {
  opacity: 1;
}

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

.about-text-full {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.about-text-full h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 24px;
}

.about-text-full p {
  font-size: 1.25rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

/* ===== Map ===== */
.map-section {
  padding: 0;
}

.map-container {
  width: 100%;
  height: 500px;
  position: relative;
}

.map-logo-marker {
  background: none !important;
  border: none !important;
}

.map-logo-box {
  background: white;
  padding: 6px 12px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  text-align: center;
}

.map-logo-box img {
  height: 22px;
  width: auto;
}

/* ===== Contact ===== */
.contact {
  background: var(--color-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

.contact-info h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 20px;
}

.contact-info > p {
  color: var(--color-text-light);
  margin-bottom: 40px;
  font-size: 1.2rem;
  line-height: 1.7;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59, 130, 246, 0.08);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-detail-item span {
  font-size: 0.95rem;
  color: var(--color-text);
}

/* Contact Form */
.contact-form {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-primary);
  background: var(--color-bg);
  transition: all var(--transition);
  outline: none;
}

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

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  justify-content: center;
  padding: 16px 32px;
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-submit:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--color-accent-glow);
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-dark);
  color: rgba(248, 250, 252, 0.6);
  padding: 48px 0 32px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links {
  display: flex;
  list-style: none;
  gap: 24px;
}

.footer-links a {
  color: rgba(248, 250, 252, 0.6);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 0.85rem;
}

@media (max-width: 600px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.fade-in-delay-1 { transition-delay: 0.15s; }
.fade-in-delay-2 { transition-delay: 0.3s; }
.fade-in-delay-3 { transition-delay: 0.45s; }
.fade-in-delay-4 { transition-delay: 0.6s; }

/* Scroll-triggered rows */
.scroll-card {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-card.visible {
  opacity: 1;
  transform: translateX(0);
}

.scroll-card .feature-number {
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.6s ease 0.3s, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.3s;
}

.scroll-card.visible .feature-number {
  opacity: 1;
  transform: scale(1);
}

.scroll-card .feature-tag {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.scroll-card.visible .feature-tag:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0.4s; }
.scroll-card.visible .feature-tag:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 0.5s; }
.scroll-card.visible .feature-tag:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 0.6s; }
.scroll-card.visible .feature-tag:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 0.7s; }
.scroll-card.visible .feature-tag:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 0.8s; }

/* Slide from left */
.slide-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Slide from right */
.slide-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale up */
.scale-in {
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Hero text animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero .typewriter .char {
  opacity: 0;
  transition: opacity 0.15s ease;
}

.hero .typewriter .char.show {
  opacity: 1;
}

.hero .typewriter .cursor {
  display: none;
  width: 3px;
  height: 0.9em;
  background: var(--color-accent);
  margin-left: 4px;
  vertical-align: text-bottom;
  animation: cursorBlink 0.8s ease-in-out infinite;
}

@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero .hero-text {
  opacity: 0;
}

.hero .hero-text.show {
  animation: fadeInUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Floating effect for slideshow */

/* Stagger children for customer list */
.customers-list p {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.customers-list.visible p:nth-child(1) { transition-delay: 0.05s; }
.customers-list.visible p:nth-child(2) { transition-delay: 0.1s; }
.customers-list.visible p:nth-child(3) { transition-delay: 0.15s; }
.customers-list.visible p:nth-child(4) { transition-delay: 0.2s; }
.customers-list.visible p:nth-child(5) { transition-delay: 0.25s; }
.customers-list.visible p:nth-child(6) { transition-delay: 0.3s; }
.customers-list.visible p:nth-child(7) { transition-delay: 0.35s; }

.customers-list.visible p {
  opacity: 1;
  transform: translateY(0);
}

/* Tech logos stagger */
.tech-logo {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease, filter 0.3s ease;
}

.tech-logos-grid.visible .tech-logo:nth-child(1) { transition-delay: 0.05s; }
.tech-logos-grid.visible .tech-logo:nth-child(2) { transition-delay: 0.1s; }
.tech-logos-grid.visible .tech-logo:nth-child(3) { transition-delay: 0.15s; }
.tech-logos-grid.visible .tech-logo:nth-child(4) { transition-delay: 0.2s; }
.tech-logos-grid.visible .tech-logo:nth-child(5) { transition-delay: 0.25s; }
.tech-logos-grid.visible .tech-logo:nth-child(6) { transition-delay: 0.3s; }

.tech-logos-grid.visible .tech-logo {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Imprint Page ===== */
.imprint-hero {
  background: var(--color-bg-dark);
  padding: 140px 0 60px;
  text-align: center;
}

.imprint-hero h1 {
  color: var(--color-text-white);
  font-size: 2.5rem;
}

.imprint-content {
  padding: 80px 0;
}

.imprint-content .container {
  max-width: 800px;
}

.imprint-content h1 {
  font-size: 1.5rem;
  margin-top: 48px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.imprint-content h2 {
  font-size: 1.2rem;
  margin-top: 32px;
  margin-bottom: 8px;
}

.imprint-content h4 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--color-accent);
}

.imprint-content p {
  margin-bottom: 8px;
  color: var(--color-text);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-alt);
}

::-webkit-scrollbar-thumb {
  background: #c1c1c1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #999;
}

/* ===== Selection ===== */
::selection {
  background: rgba(59, 130, 246, 0.2);
  color: var(--color-primary);
}

/* ===== Greeting ===== */
.greeting-overlay {
  position: fixed;
  top: 160px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  z-index: 9999;
  background: white;
  border-radius: var(--radius-md);
  padding: 24px 44px;
  box-shadow: var(--shadow-xl);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.greeting-overlay.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.greeting-text {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

/* ===== Back to Top Button ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--color-accent);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 999;
  pointer-events: none;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--color-accent-glow);
}

/* ===== Toast Notification ===== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 16px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  color: white;
  z-index: 9999;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  background: #16a34a;
  box-shadow: 0 4px 15px rgba(22, 163, 74, 0.3);
}

.toast.error {
  background: #dc2626;
  box-shadow: 0 4px 15px rgba(220, 38, 38, 0.3);
}