/* ===== CSS Variables / Color Palette ===== */
:root {
  --color-primary: #F2C4CE;   /* Rosa pálido */
  --color-accent: #3A3A3A;    /* Gris carbón */
  --color-bg: #FEFEFE;        /* Blanco roto */
  --color-text: #3A3A3A;      /* Gris carbón */
  --color-secondary: #E8E8E8; /* Gris claro para bordes */
  --color-success: #4CAF50;  /* Verde para confirmación */
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

/* ===== Utility Classes ===== */
.bg-primary { background-color: var(--color-primary); }
.bg-accent { background-color: var(--color-accent); }
.bg-bg { background-color: var(--color-bg); }
.bg-white { background-color: #FFFFFF; }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-white { color: #FFFFFF; }
.text-text { color: var(--color-text); }

/* ===== Form Styles ===== */
input:focus:invalid,
select:focus:invalid,
textarea:focus:invalid {
  border-color: #EF4444 !important;
}

input:invalid:not(:placeholder-shown),
select:invalid:not(:valid),
textarea:invalid:not(:placeholder-shown) {
  border-color: #EF4444 !important;
}

input:not(:focus):not(:placeholder-shown):invalid + span,
select:not(:focus):not(:valid) + span {
  display: block !important;
}

input:not(:focus):not(:placeholder-shown):not(:invalid) {
  border-color: var(--color-secondary);
}

/* ===== Custom Focus Styles ===== */
input:focus,
select:focus,
textarea:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(242, 196, 206, 0.3);
}

/* ===== Button Hover Effects ===== */
button[type="submit"] {
  cursor: pointer;
  transition: all 0.3s ease;
}

button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

button[type="submit"]:active {
  transform: translateY(0);
}

/* ===== Lightbox Animations ===== */
#lightbox {
  opacity: 0;
  transition: opacity 0.3s ease;
}

#lightbox.active {
  opacity: 1;
}

#lightbox.active img {
  animation: lightbox-zoom 0.3s ease;
}

@keyframes lightbox-zoom {
  from {
    transform: scale(0.9);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* ===== Fade-in Animations (IntersectionObserver) ===== */
.fade-in-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Stagger animations for countdown items */
.countdown-item {
  opacity: 0;
  transform: translateY(20px);
}

.countdown-item.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.countdown-item:nth-child(1).is-visible { transition-delay: 0s; }
.countdown-item:nth-child(2).is-visible { transition-delay: 0.1s; }
.countdown-item:nth-child(3).is-visible { transition-delay: 0.2s; }
.countdown-item:nth-child(4).is-visible { transition-delay: 0.3s; }

/* ===== Scroll Indicator ===== */
@keyframes bounce {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-10px);
  }
}

.animate-bounce svg {
  animation: bounce 2s ease-in-out infinite;
}

/* ===== Pulse Animation for "Today is the day" ===== */
@keyframes pulse-text {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.animate-pulse {
  animation: pulse-text 2s ease-in-out infinite;
}

/* ===== Gallery Hover Effects ===== */
.gallery-item img {
  transition: transform 0.4s ease, filter 0.4s ease;
}

.gallery-item:hover img {
  transform: scale(1.08);
}

/* ===== Responsive Adjustments ===== */
@media (max-width: 768px) {
  #countdown-container {
    gap: 8px;
  }
  
  #days, #hours, #minutes, #seconds {
    font-size: 2.5rem !important;
  }
  
  .countdown-item span:last-child {
    font-size: 0.65rem;
  }
}

@media (max-width: 480px) {
  #countdown-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  #days, #hours, #minutes, #seconds {
    font-size: 2rem !important;
  }
}

/* ===== Print Styles ===== */
@media print {
  .no-print {
    display: none !important;
  }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== Loading State for Images ===== */
img {
  background-color: var(--color-secondary);
}

/* ===== Lightbox Counter ===== */
#lightbox-counter {
  font-family: 'Inter', sans-serif;
}

/* ===== Form Success State ===== */
#rsvp-form.hidden {
  display: none;
}

#rsvp-success {
  animation: fade-in-up 0.5s ease;
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Section Dividers ===== */
section {
  position: relative;
}

/* ===== Scroll to top button (optional enhancement) ===== */
.scroll-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 40;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--color-accent);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent);
}