/* ==========================================================================
   Music Grill — Main Stylesheet
   Mobile-first responsive design with "Llamas" (Flames) palette
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Llamas Palette */
  --color-white: #FFFFFF;
  --color-black: #1A1A1A;
  --color-gold: #FFD700;
  --color-orange-red: #FF4500;
  --color-dark-gray: #2A2A2A;
  --color-medium-gray: #3A3A3A;
  --color-light-gray: #F5F5F5;
  --color-muted: #B0B0B0;

  /* Gradients */
  --gradient-flame: linear-gradient(135deg, var(--color-gold) 0%, var(--color-orange-red) 100%);
  --gradient-flame-reverse: linear-gradient(135deg, var(--color-orange-red) 0%, var(--color-gold) 100%);
  --gradient-flame-vertical: linear-gradient(180deg, var(--color-gold) 0%, var(--color-orange-red) 100%);
  --gradient-flame-diagonal: linear-gradient(45deg, var(--color-orange-red) 0%, var(--color-gold) 50%, var(--color-orange-red) 100%);
  --gradient-dark-overlay: linear-gradient(180deg, rgba(26, 26, 26, 0.85) 0%, rgba(26, 26, 26, 0.6) 50%, rgba(26, 26, 26, 0.9) 100%);
  --gradient-hero-overlay: linear-gradient(135deg, rgba(26, 26, 26, 0.9) 0%, rgba(255, 69, 0, 0.3) 50%, rgba(26, 26, 26, 0.85) 100%);

  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --font-size-base: 1rem;
  --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;
  --font-size-5xl: 4.5rem;
  --line-height-base: 1.6;
  --line-height-heading: 1.2;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;

  /* Borders & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.3);
  --shadow-flame: 0 4px 20px rgba(255, 69, 0, 0.3);
  --shadow-flame-lg: 0 8px 35px rgba(255, 69, 0, 0.4);
  --shadow-glow-gold: 0 0 20px rgba(255, 215, 0, 0.4);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-slower: 0.8s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-black);
  background-color: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-orange-red);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

ul,
ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: var(--color-black);
  margin-bottom: var(--spacing-md);
}

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

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--spacing-md);
  color: inherit;
}

.lead {
  font-size: var(--font-size-lg);
  font-weight: 300;
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   4. Navbar
   -------------------------------------------------------------------------- */
.navbar-mg {
  background-color: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: var(--spacing-sm) 0;
  border-bottom: 2px solid transparent;
  border-image: var(--gradient-flame) 1;
  transition: all var(--transition-base);
  z-index: 1050;
}

.navbar-mg.scrolled {
  background-color: rgba(26, 26, 26, 0.98);
  box-shadow: var(--shadow-lg), 0 2px 15px rgba(255, 69, 0, 0.15);
}

.navbar-mg .navbar-brand {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 800;
  letter-spacing: 1px;
  background: var(--gradient-flame);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: opacity var(--transition-base);
}

.navbar-mg .navbar-brand:hover {
  opacity: 0.85;
}

.navbar-mg .nav-link {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: var(--spacing-sm) var(--spacing-md) !important;
  position: relative;
  transition: color var(--transition-base);
}

.navbar-mg .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--gradient-flame);
  transition: width var(--transition-base);
}

.navbar-mg .nav-link:hover,
.navbar-mg .nav-link.active {
  color: var(--color-gold);
}

.navbar-mg .nav-link:hover::after,
.navbar-mg .nav-link.active::after {
  width: 70%;
}

.navbar-mg .navbar-toggler {
  border: 1px solid rgba(255, 215, 0, 0.4);
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: all var(--transition-base);
}

.navbar-mg .navbar-toggler:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-flame);
}

.navbar-mg .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,215,0,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* --------------------------------------------------------------------------
   5. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-color: var(--color-black);
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-hero-overlay);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: var(--spacing-xl);
}

.hero-content h1 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease forwards;
}

.hero-content p {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--spacing-2xl);
  animation: fadeInUp 1s ease 0.3s forwards;
  opacity: 0;
}

.hero-content .btn-cta {
  animation: fadeInUp 1s ease 0.6s forwards;
  opacity: 0;
}

/* Hero Particles / Glow Effects */
.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.hero-particles .particle {
  position: absolute;
  border-radius: var(--radius-full);
  animation: particleFloat linear infinite;
  opacity: 0;
}

.hero-particles .particle:nth-child(1) {
  width: 6px;
  height: 6px;
  background: var(--color-gold);
  left: 10%;
  bottom: -10%;
  animation-duration: 8s;
  animation-delay: 0s;
}

.hero-particles .particle:nth-child(2) {
  width: 4px;
  height: 4px;
  background: var(--color-orange-red);
  left: 25%;
  bottom: -10%;
  animation-duration: 10s;
  animation-delay: 1s;
}

.hero-particles .particle:nth-child(3) {
  width: 8px;
  height: 8px;
  background: var(--color-gold);
  left: 45%;
  bottom: -10%;
  animation-duration: 7s;
  animation-delay: 2s;
}

.hero-particles .particle:nth-child(4) {
  width: 5px;
  height: 5px;
  background: var(--color-orange-red);
  left: 65%;
  bottom: -10%;
  animation-duration: 9s;
  animation-delay: 0.5s;
}

.hero-particles .particle:nth-child(5) {
  width: 7px;
  height: 7px;
  background: var(--color-gold);
  left: 80%;
  bottom: -10%;
  animation-duration: 11s;
  animation-delay: 3s;
}

.hero-particles .particle:nth-child(6) {
  width: 3px;
  height: 3px;
  background: var(--color-orange-red);
  left: 55%;
  bottom: -10%;
  animation-duration: 6s;
  animation-delay: 1.5s;
}

.hero-particles .particle:nth-child(7) {
  width: 5px;
  height: 5px;
  background: var(--color-gold);
  left: 35%;
  bottom: -10%;
  animation-duration: 12s;
  animation-delay: 4s;
}

.hero-particles .particle:nth-child(8) {
  width: 4px;
  height: 4px;
  background: var(--color-orange-red);
  left: 90%;
  bottom: -10%;
  animation-duration: 8s;
  animation-delay: 2.5s;
}

/* Hero Glow Orbs */
.hero-glow {
  position: absolute;
  border-radius: var(--radius-full);
  filter: blur(60px);
  z-index: 0;
  pointer-events: none;
}

.hero-glow--primary {
  width: 300px;
  height: 300px;
  background: rgba(255, 69, 0, 0.15);
  top: 20%;
  right: -5%;
  animation: glowPulse 6s ease-in-out infinite;
}

.hero-glow--secondary {
  width: 250px;
  height: 250px;
  background: rgba(255, 215, 0, 0.1);
  bottom: 10%;
  left: -5%;
  animation: glowPulse 8s ease-in-out infinite 2s;
}

/* --------------------------------------------------------------------------
   6. Section Styles
   -------------------------------------------------------------------------- */
.section-padding {
  padding: var(--spacing-4xl) 0;
}

.section {
  padding: var(--spacing-4xl) 0;
  position: relative;
}

/* Compensar navbar fixed-top en páginas internas */
main#main-content > section:first-child:not(.hero-section) {
  margin-top: 70px;
}

.section--light {
  background-color: var(--color-white);
}

.section--gray {
  background-color: var(--color-light-gray);
}

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

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-white);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--gradient-flame);
  margin: var(--spacing-md) auto 0;
  border-radius: var(--radius-sm);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   7. Card Styles (Services)
   -------------------------------------------------------------------------- */
.card-service {
  background-color: var(--color-white);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  height: 100%;
}

.card-service::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-flame);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.card-service:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl), var(--shadow-flame);
}

.card-service:hover::before {
  transform: scaleX(1);
}

.card-service__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 70px;
  height: 70px;
  border-radius: var(--radius-full);
  background: var(--gradient-flame);
  color: var(--color-white);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card-service:hover .card-service__icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: var(--shadow-flame-lg);
}

.card-service__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-black);
}

.card-service__text {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   8. CTA Buttons
   -------------------------------------------------------------------------- */
.btn-cta {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: var(--spacing-md) var(--spacing-2xl);
  border: none;
  border-radius: var(--radius-xl);
  background: var(--gradient-flame);
  color: var(--color-white);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  z-index: 1;
}

.btn-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-flame-reverse);
  transition: left var(--transition-slow);
  z-index: -1;
}

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

.btn-cta:hover::before {
  left: 0;
}

.btn-cta:active {
  transform: translateY(0);
  box-shadow: var(--shadow-flame);
}

.btn-cta--outline {
  background: transparent;
  border: 2px solid var(--color-gold);
  color: var(--color-gold);
}

.btn-cta--outline::before {
  background: var(--gradient-flame);
}

.btn-cta--outline:hover {
  color: var(--color-white);
  border-color: transparent;
}

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

.btn-cta--dark::before {
  background: var(--gradient-flame);
}

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

/* Alias .btn-flame para uso en vistas */
.btn-flame {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 0.75rem 2rem;
  border: none;
  border-radius: var(--radius-xl);
  background: var(--gradient-flame);
  color: var(--color-white);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  z-index: 1;
  text-decoration: none;
}

.btn-flame::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-flame-reverse);
  transition: left var(--transition-slow);
  z-index: -1;
}

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

.btn-flame:hover::before {
  left: 0;
}

.btn-flame:active {
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   9. Contact Form
   -------------------------------------------------------------------------- */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
}

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

.contact-form .form-label {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-black);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-xs);
  display: block;
}

.contact-form .form-control {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--color-black);
  background-color: var(--color-light-gray);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  outline: none;
}

.contact-form .form-control:focus {
  background-color: var(--color-white);
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.15);
}

.contact-form .form-control::placeholder {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
}

.contact-form textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.contact-form .form-control.is-invalid {
  border-color: var(--color-orange-red);
  box-shadow: 0 0 0 3px rgba(255, 69, 0, 0.1);
}

.contact-form .invalid-feedback {
  font-size: var(--font-size-sm);
  color: var(--color-orange-red);
  margin-top: var(--spacing-xs);
}

.contact-form .form-check-label {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.contact-form .form-check-input:checked {
  background-color: var(--color-orange-red);
  border-color: var(--color-orange-red);
}

/* --------------------------------------------------------------------------
   10. Footer
   -------------------------------------------------------------------------- */
.footer-mg {
  background-color: var(--color-black);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
  position: relative;
}

.footer-mg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-flame);
}

.footer-mg h5 {
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.footer-mg h5::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--gradient-flame);
  border-radius: var(--radius-sm);
}

.footer-mg p {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.footer-mg a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-base), padding-left var(--transition-base);
}

.footer-mg a:hover {
  color: var(--color-gold);
  padding-left: 4px;
}

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

.footer-mg__links li {
  margin-bottom: var(--spacing-sm);
}

.footer-mg__links a {
  font-size: var(--font-size-sm);
  display: inline-block;
}

.footer-mg__links a::before {
  content: '\203A';
  margin-right: var(--spacing-sm);
  color: var(--color-orange-red);
  transition: margin-right var(--transition-base);
}

.footer-mg__links a:hover::before {
  margin-right: var(--spacing-md);
}

.footer-mg__social {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-mg__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
  padding-left: 0;
}

.footer-mg__social a:hover {
  background: var(--gradient-flame);
  border-color: transparent;
  color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: var(--shadow-flame);
  padding-left: 0;
}

.footer-mg__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-xl);
  text-align: center;
}

.footer-mg__bottom p {
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-xs);
  color: rgba(255, 255, 255, 0.5);
}

.footer-mg__tagline {
  font-family: var(--font-heading);
  font-weight: 600;
  background: var(--gradient-flame);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: var(--font-size-sm);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 45px;
  height: 45px;
  border-radius: var(--radius-full);
  background: var(--gradient-flame);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-flame);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 1040;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-flame-lg);
}

/* --------------------------------------------------------------------------
   11. Keyframe Animations
   -------------------------------------------------------------------------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes particleFloat {
  0% {
    transform: translateY(0) translateX(0) scale(1);
    opacity: 0;
  }
  10% {
    opacity: 0.8;
  }
  50% {
    opacity: 0.5;
  }
  90% {
    opacity: 0.2;
  }
  100% {
    transform: translateY(-100vh) translateX(50px) scale(0.3);
    opacity: 0;
  }
}

@keyframes glowPulse {
  0%, 100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(1.2);
  }
}

@keyframes flameFlicker {
  0%, 100% {
    text-shadow: 0 0 4px rgba(255, 69, 0, 0.4), 0 0 11px rgba(255, 69, 0, 0.2);
  }
  50% {
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.6), 0 0 20px rgba(255, 69, 0, 0.3);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% center;
  }
  100% {
    background-position: 200% center;
  }
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 5px rgba(255, 69, 0, 0.2);
  }
  50% {
    box-shadow: 0 0 20px rgba(255, 69, 0, 0.5), 0 0 40px rgba(255, 215, 0, 0.2);
  }
}

@keyframes spinSlow {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* --------------------------------------------------------------------------
   12. Utility Classes
   -------------------------------------------------------------------------- */

/* Flame Text Gradient */
.text-flame,
.flame-text {
  background: var(--gradient-flame);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Fix: icon fonts no soportan background-clip:text en móvil */
i.flame-text,
i.text-flame {
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
  -webkit-text-fill-color: var(--color-orange-red);
  color: var(--color-orange-red);
}

.text-flame-animated {
  background: linear-gradient(90deg, var(--color-gold), var(--color-orange-red), var(--color-gold));
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 3s linear infinite;
}

/* Flame Backgrounds */
.bg-flame,
.flame-gradient {
  background: var(--gradient-flame);
}

.bg-flame-reverse {
  background: var(--gradient-flame-reverse);
}

.bg-flame-diagonal {
  background: var(--gradient-flame-diagonal);
}

.bg-dark-mg {
  background-color: var(--color-black);
}

/* Flame Hover Effect on Links */
.flame-link {
  position: relative;
  color: var(--color-black);
  transition: color var(--transition-base);
}

.flame-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-flame);
  transition: width var(--transition-base);
}

.flame-link:hover {
  color: var(--color-orange-red);
}

.flame-link:hover::after {
  width: 100%;
}

/* Flame Border */
.flame-border {
  border: 2px solid transparent;
  border-image: var(--gradient-flame) 1;
}

/* Flame Glow */
.flame-glow {
  animation: pulseGlow 3s ease-in-out infinite;
}

/* Divider */
.divider-flame {
  height: 3px;
  width: 80px;
  background: var(--gradient-flame);
  border: none;
  border-radius: var(--radius-sm);
  margin: var(--spacing-lg) auto;
}

/* Spacing Helpers */
.pt-section { padding-top: var(--spacing-4xl); }
.pb-section { padding-bottom: var(--spacing-4xl); }
.mt-section { margin-top: var(--spacing-4xl); }
.mb-section { margin-bottom: var(--spacing-4xl); }

/* Text Utilities */
.text-muted-mg {
  color: var(--color-muted);
}

.text-white-soft {
  color: rgba(255, 255, 255, 0.8);
}

/* Scroll Reveal (used with JS) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slower), transform var(--transition-slower);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   13. Responsive Breakpoints
   -------------------------------------------------------------------------- */

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
  h1 {
    font-size: var(--font-size-3xl);
  }

  .hero-content h1 {
    font-size: var(--font-size-4xl);
    letter-spacing: 4px;
  }

  .section-header h2 {
    font-size: var(--font-size-2xl);
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  :root {
    --font-size-base: 1rem;
  }

  h1 {
    font-size: var(--font-size-4xl);
  }

  h2 {
    font-size: var(--font-size-3xl);
  }

  .section,
  .section-padding {
    padding: var(--spacing-5xl) 0;
  }

  .section-header h2 {
    font-size: var(--font-size-3xl);
  }

  .hero-content h1 {
    font-size: var(--font-size-4xl);
  }

  .hero-content p {
    font-size: var(--font-size-xl);
  }

  .card-service {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  h1 {
    font-size: var(--font-size-4xl);
  }

  .hero-content h1 {
    font-size: var(--font-size-5xl);
    letter-spacing: 5px;
  }

  .hero-content p {
    font-size: var(--font-size-xl);
  }

  .navbar-mg .nav-link {
    padding: var(--spacing-sm) var(--spacing-lg) !important;
  }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
  .hero-content {
    max-width: 900px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .hero-particles .particle,
  .hero-glow {
    display: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Print styles */
@media print {
  .navbar-mg,
  .back-to-top,
  .hero-particles,
  .hero-glow {
    display: none !important;
  }

  body {
    color: #000;
    background: #fff;
  }

  .section--dark {
    background: #fff;
    color: #000;
  }

  .footer-mg {
    background: #fff;
    color: #000;
  }
}