/* Reset y base */
* { 
  margin: 0; 
  padding: 0; 
  box-sizing: border-box; 
}

:root {
  --primary-black: #0a0a0a;
  --secondary-black: #1a1a1a;
  --accent-white: #ffffff;
  --text-primary: #333;
  --text-secondary: #666;
  --border-color: #e0e0e0;
  --shadow-light: rgba(0, 0, 0, 0.1);
  --shadow-heavy: rgba(0, 0, 0, 0.3);
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  background: #fafafa;
  overflow-x: hidden;
}

/* HEADER FIJO - Brutalist y Bold */
.logo-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--primary-black);
  z-index: 1000;
  box-shadow: 0 4px 20px var(--shadow-heavy);
  border-bottom: 3px solid var(--accent-white);
  transition: all var(--transition-smooth);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo-header .logo {
  height: 50px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: all var(--transition-smooth);
  transform: scale(1);
}

.logo-header .logo:hover {
  transform: scale(1.05);
  filter: brightness(0) invert(1) drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
}

/* CONTENEDOR PRINCIPAL */
.tracking-container {
  min-height: 100vh;
  padding-top: 100px;
  padding-bottom: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.content-wrapper {
  max-width: 700px;
  width: 100%;
  margin: 0 auto;
  padding: 3rem 2rem;
  text-align: center;
  background: var(--accent-white);
  border-radius: 0;
  box-shadow: 
    0 10px 40px var(--shadow-light),
    0 0 0 1px var(--border-color);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.content-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-black), var(--secondary-black));
}

.content-wrapper:hover {
  box-shadow: 
    0 20px 60px var(--shadow-light),
    0 0 0 2px var(--primary-black);
  transform: translateY(-2px);
}

/* TIPOGRAFÍA */
.main-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--primary-black);
  margin-bottom: 1.5rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  position: relative;
  animation: slideInUp 0.6s ease-out;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 400;
  animation: slideInUp 0.6s ease-out 0.1s both;
}

.instructions {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
  font-weight: 500;
  animation: slideInUp 0.6s ease-out 0.2s both;
}

.arrow-icon {
  color: var(--primary-black);
  font-size: 1.2rem;
  margin-left: 0.5rem;
  animation: bounce 2s infinite;
}

/* INPUT GROUP - Brutalist Design */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 500px;
  margin: 0 auto;
  animation: slideInUp 0.6s ease-out 0.3s both;
}

.input-container {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--accent-white);
  border: 2px solid var(--border-color);
  transition: all var(--transition-smooth);
  overflow: hidden;
}

.input-container:hover {
  border-color: var(--primary-black);
  box-shadow: 0 0 0 4px rgba(10, 10, 10, 0.1);
}

.input-container:focus-within {
  border-color: var(--primary-black);
  box-shadow: 0 0 0 4px rgba(10, 10, 10, 0.2);
}

.input-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition-fast);
  z-index: 1;
}

.input-container:focus-within .input-icon {
  color: var(--primary-black);
  transform: scale(1.1);
}

#email {
  width: 100%;
  padding: 1.2rem 1rem 1.2rem 3rem;
  border: none;
  outline: none;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  background: transparent;
  transition: all var(--transition-fast);
}

#email::placeholder {
  color: var(--text-secondary);
  font-weight: 400;
}

#email:focus::placeholder {
  opacity: 0.7;
  transform: translateX(10px);
}

/* BOTÓN DE BÚSQUEDA - Brutalist */
.search-btn {
  padding: 1.2rem 2rem;
  background: var(--primary-black);
  color: var(--accent-white);
  border: none;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 4px 15px var(--shadow-light);
}

.search-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-smooth);
}

.search-btn:hover::before {
  left: 100%;
}

.search-btn:hover {
  background: var(--secondary-black);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-heavy);
}

.search-btn:active {
  transform: translateY(0);
  box-shadow: 0 4px 15px var(--shadow-light);
}

.search-btn i {
  transition: all var(--transition-fast);
}

.search-btn:hover i {
  transform: scale(1.1);
}

/* LOADING SPINNER */
.loading-spinner {
  display: none;
  margin-top: 2rem;
  color: var(--primary-black);
  font-size: 1.5rem;
  animation: pulse 1.5s infinite;
}

.loading-spinner.active {
  display: block;
}

/* FOOTER */
.logo-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--primary-black);
  z-index: 999;
  opacity: 0.7;
  transition: all var(--transition-smooth);
}

.logo-footer:hover {
  opacity: 1;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.8rem 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo-footer .logo {
  height: 30px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.8;
  transition: all var(--transition-smooth);
}

.logo-footer .logo:hover {
  opacity: 1;
  transform: scale(1.05);
}

/* ANIMACIONES */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 1;
  }
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .content-wrapper {
    margin: 1rem;
    padding: 2rem 1.5rem;
  }
  
  .input-group {
    gap: 1rem;
  }
  
  .header-content,
  .footer-content {
    padding: 1rem;
  }
  
  .logo-header .logo {
    height: 40px;
  }
  
  .logo-footer .logo {
    height: 25px;
  }
  
  .main-title {
    font-size: 1.5rem;
  }
  
  .tracking-container {
    padding-top: 80px;
    padding-bottom: 80px;
  }
}

@media (max-width: 480px) {
  .content-wrapper {
    padding: 1.5rem 1rem;
  }
  
  .search-btn {
    padding: 1rem 1.5rem;
    font-size: 0.9rem;
  }
  
  #email {
    padding: 1rem 1rem 1rem 2.5rem;
  }
}

/* Estados de focus mejorados */
.input-container:focus-within::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 2px solid var(--primary-black);
  pointer-events: none;
  animation: focusGlow 0.3s ease-out;
}

@keyframes focusGlow {
  0% {
    opacity: 0;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}