/* ==========================================================================
   AMOR & AMISTAD - HOJA DE ESTILOS MODERNA Y ROMÁNTICA
   Paleta: Rosa suave, carmesí cálido, blanco marfil y sombras sutiles
   ========================================================================== */

:root {
  --primary: #e63946;
  --primary-hover: #d62828;
  --primary-subtle: #ffe5ec;
  --primary-light: #ff758f;
  --accent-pink: #fb6f92;
  --bg-gradient-start: #fff0f3;
  --bg-gradient-end: #ffccd5;
  --card-bg: rgba(255, 255, 255, 0.94);
  --card-border: rgba(255, 182, 193, 0.45);
  --text-main: #2b2d42;
  --text-muted: #6c757d;
  --text-light: #8d99ae;
  --success: #2a9d8f;
  --success-bg: #e8f5e9;
  --danger: #d90429;
  --danger-bg: #ffebee;
  --warning: #f4a261;
  --warning-bg: #fff8e1;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --shadow-sm: 0 4px 12px rgba(230, 57, 70, 0.08);
  --shadow-md: 0 10px 30px rgba(230, 57, 70, 0.12);
  --shadow-lg: 0 20px 40px rgba(230, 57, 70, 0.18);
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-family);
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, #fff 50%, var(--bg-gradient-end) 100%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* Decoración flotante sutil de corazones en el fondo */
.bg-hearts-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  opacity: 0.6;
}

.floating-heart {
  position: absolute;
  color: rgba(255, 117, 143, 0.25);
  user-select: none;
  animation: floatUp 14s infinite linear;
}

@keyframes floatUp {
  0% {
    transform: translateY(110vh) scale(0.8) rotate(0deg);
    opacity: 0;
  }
  20% {
    opacity: 0.8;
  }
  80% {
    opacity: 0.8;
  }
  100% {
    transform: translateY(-15vh) scale(1.2) rotate(360deg);
    opacity: 0;
  }
}

/* Encabezado y Navegación */
.site-header {
  position: relative;
  z-index: 10;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

.nav-logo:hover {
  transform: scale(1.03);
}

.nav-logo svg {
  width: 28px;
  height: 28px;
  fill: var(--primary);
  filter: drop-shadow(0 2px 4px rgba(230, 57, 70, 0.3));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 500;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  transition: var(--transition);
  font-size: 0.95rem;
}

.nav-link:hover {
  background: var(--primary-subtle);
  color: var(--primary);
}

.nav-link.active {
  background: var(--primary);
  color: #fff;
}

/* Contenedor Principal */
.main-content {
  flex: 1;
  position: relative;
  z-index: 1;
  padding: 2.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container-sm {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
}

.container-md {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
}

.container-lg {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
}

/* Tarjetas */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

/* Hero Landing */
.hero-wrapper {
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary-subtle);
  color: var(--primary);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 6px rgba(230, 57, 70, 0.1);
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1.2rem;
  text-shadow: 0 2px 10px rgba(230, 57, 70, 0.15);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 2rem auto;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  margin-bottom: 2.5rem;
}

@media (min-width: 540px) {
  .hero-actions {
    flex-direction: row;
  }
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-pink) 100%);
  color: #fff;
  box-shadow: 0 6px 18px rgba(230, 57, 70, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(230, 57, 70, 0.45);
}

.btn-secondary {
  background: #fff;
  color: var(--text-main);
  border: 1px solid rgba(0, 0, 0, 0.12);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--primary-subtle);
  color: var(--primary);
  border-color: var(--primary-light);
  transform: translateY(-2px);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: #b70020;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Caja de Privacidad en Landing */
.privacy-box {
  background: rgba(255, 255, 255, 0.75);
  border: 1px dashed var(--accent-pink);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  text-align: left;
  max-width: 620px;
  margin: 0 auto;
}

.privacy-box svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  fill: var(--primary);
  margin-top: 2px;
}

.privacy-box-title {
  font-weight: 700;
  color: var(--primary);
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.privacy-box-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Tarjeta Formulario de Subida */
.form-header {
  text-align: center;
  margin-bottom: 2rem;
}

.form-header h1 {
  font-size: 1.85rem;
  color: var(--primary);
  margin-bottom: 0.4rem;
}

.form-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 1.4rem;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.45rem;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 0.8rem 1.1rem;
  font-size: 1rem;
  font-family: inherit;
  border: 1.5px solid rgba(0, 0, 0, 0.12);
  border-radius: var(--radius-md);
  background: #fff;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.15);
}

/* Dropzone para fotografía */
.dropzone {
  border: 2px dashed rgba(230, 57, 70, 0.4);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  text-align: center;
  cursor: pointer;
  background: rgba(255, 240, 243, 0.35);
  transition: var(--transition);
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: rgba(255, 240, 243, 0.7);
  transform: scale(1.01);
}

.dropzone-icon {
  width: 48px;
  height: 48px;
  fill: var(--primary);
  margin-bottom: 0.75rem;
}

.dropzone-text {
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.3rem;
}

.dropzone-hint {
  font-size: 0.82rem;
  color: var(--text-light);
}

.file-input-hidden {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

/* Área de Previsualización Local */
.preview-container {
  display: none;
  margin-top: 1.2rem;
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  padding: 1rem;
  text-align: center;
}

.preview-container.active {
  display: block;
  animation: fadeIn 0.3s ease-out forwards;
}

.preview-image-wrapper {
  max-width: 320px;
  max-height: 260px;
  margin: 0 auto 0.75rem auto;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.preview-image-wrapper img {
  width: 100%;
  height: 100%;
  max-height: 260px;
  object-fit: cover;
  display: block;
}

.preview-disclaimer {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  background: var(--warning-bg);
  color: #8a5300;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(244, 162, 97, 0.4);
}

/* Alertas y Mensajes */
.alert {
  padding: 0.9rem 1.2rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.2rem;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.alert-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(217, 4, 41, 0.25);
}

.alert-success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(42, 157, 143, 0.25);
}

/* Pantalla de Agradecimiento */
.thankyou-wrapper {
  text-align: center;
}

.thankyou-heart-anim {
  width: 90px;
  height: 90px;
  fill: var(--primary);
  margin: 0 auto 1.5rem auto;
  animation: heartbeat 1.8s infinite ease-in-out;
  filter: drop-shadow(0 8px 20px rgba(230, 57, 70, 0.35));
}

@keyframes heartbeat {
  0% { transform: scale(1); }
  14% { transform: scale(1.22); }
  28% { transform: scale(1); }
  42% { transform: scale(1.18); }
  70% { transform: scale(1); }
}

.thankyou-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 1rem;
}

.thankyou-message {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 2rem auto;
}

/* Panel Administrativo */
.admin-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.admin-title h1 {
  font-size: 1.8rem;
  color: var(--primary);
}

.admin-title p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 1.4rem;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
}

/* Tabla Administrativa */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.admin-table th {
  background: var(--primary-subtle);
  color: var(--primary);
  font-weight: 700;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--card-border);
  white-space: nowrap;
}

.admin-table td {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  vertical-align: middle;
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover {
  background: rgba(255, 240, 243, 0.25);
}

.thumbnail-wrapper {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  background: #f8f9fa;
  cursor: pointer;
  transition: var(--transition);
}

.thumbnail-wrapper:hover {
  transform: scale(1.08);
}

.thumbnail-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.badge-saved {
  display: inline-block;
  background: var(--success-bg);
  color: var(--success);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
  margin-left: 0.3rem;
}

/* Modal de Imagen */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(5px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  background: #fff;
  border-radius: var(--radius-md);
  max-width: 90vw;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 25px 50px rgba(0,0,0,0.25);
}

.modal-card img {
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
  display: block;
}

.modal-footer {
  padding: 0.8rem 1.2rem;
  background: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
}

/* Footer del sitio */
.site-footer {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 1.8rem 1.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-top: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
}

.site-footer span {
  color: var(--primary);
}

/* Animaciones */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Spinner */
.spinner-heart {
  display: inline-block;
  animation: spin 1s infinite linear;
}

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