/* Base */
:root {
  --bg1: #ff1d1d;
  --bg2: #0a6cff;
  --card: rgba(255, 255, 255, 0.95);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
  --text: #111;
  --muted: rgba(0, 0, 0, 0.6);
  --radius: 18px;
  --panel: #111;
  --panel-accent: #e31d1d;
  --font: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow-x: hidden;
  position: relative;
}

/* Si deseas usar otra imagen, reemplaza `img/background.jpg` por tu archivo */

.app {
  width: min(540px, 92vw);
  padding: 2rem 0;
  position: relative;
  z-index: 1;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.36);
  backdrop-filter: blur(10px);
  position: relative;
}

.card--404 {
  min-height: 400px;
  display: grid;
  place-items: center;
}

.card__header {
  padding: 1.8rem 2rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo__img {
  height: 68px;
  width: auto;
  display: block;
  max-width: 280px;
}

.subtitle {
  font-size: 0.95rem;
  font-weight: 600;
  color: rgba(0, 0, 0, 0.65);
  margin: 0;
  text-align: center;
  flex: 1;
}

.card__body {
  padding: 0 2rem 2.4rem;
  text-align: center;
}

.hero {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.02em;
}

.lead {
  margin: 1rem auto 2rem;
  font-size: 1.05rem;
  color: var(--muted);
  max-width: min(72ch, 100%);
  line-height: 1.6;
}

.grid {
  display: grid;
  gap: 2rem 1rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.panel{
  position:relative;
  display:block;
  text-decoration:none;
  margin:25px 0;
  background: white;
  border: 1px solid rgba(0,0,0,0.1);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  overflow: hidden;
}

.panel:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  transform: translateY(-2px);
}

/* capa negra */
.panel .panel-main{
  background: linear-gradient(135deg, var(--bg1), var(--bg2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight:700;
  font-size:24px;
  text-align:center;
  padding:20px;
  position:relative;
  z-index:2;
}

/* franja roja inferior */
.panel .panel-shadow{
  display: none;
}

/* esquina roja izquierda */
.panel .panel-corner{
  display: none;
}

.card__footer {
  padding: 1.2rem 2rem;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  text-align: center;
}

.card__footer small {
  color: rgba(0, 0, 0, 0.55);
}

.button {
  padding: 0.85rem 1.2rem;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: rgba(0, 0, 0, 0.9);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: transform 200ms ease, background 200ms ease;
}

.button:hover {
  background: rgba(0, 0, 0, 0.75);
  transform: translateY(-2px);
}

.button:active {
  transform: translateY(0);
}

.page-actions {
  margin-top: 2.5rem;
  display: flex;
  justify-content: center;
}

.calculator-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 18px;
  padding: 1.6rem 1.4rem;
  margin-top: 1rem;
  text-align: left;
}

.calculator-card h2 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
}

.calculator-card p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.calculator-card label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 700;
}

.calculator-card textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,0.12);
  padding: 0.9rem 1rem;
  resize: vertical;
  min-height: 100px;
  margin-bottom: 1rem;
  font-family: inherit;
}

.calculator-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1rem;
}

.calculator-table-wrapper {
  overflow-x: auto;
  margin-bottom: 1rem;
}

.calculator-table {
  width: 100%;
  border-collapse: collapse;
}

.calculator-table th,
.calculator-table td {
  padding: 0.75rem 0.85rem;
  border: 1px solid rgba(0,0,0,0.08);
  font-size: 0.95rem;
}

.calculator-table th {
  text-align: left;
  background: rgba(0,0,0,0.03);
}

.calculator-table input,
.calculator-table select {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border-radius: 10px;
  border: 1px solid rgba(0,0,0,0.12);
  font-family: inherit;
}

.calculator-table button {
  width: 100%;
  min-width: auto;
}

.totals {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.totals div {
  font-size: 0.98rem;
}

@media (max-width: 500px) {
  .calculator-card {
    padding: 1.2rem 1rem;
  }
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 999;
}

.modal[aria-hidden="false"] {
  display: flex;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
  opacity: 0;
  animation: fadeIn 260ms ease forwards;
}

.modal__panel {
  position: relative;
  background: linear-gradient(100deg, rgba(255, 0, 0, 0.95), rgba(0, 21, 255, 0.92));
  border-radius: 22px;
  padding: 2.2rem 2rem;
  width: min(520px, 92vw);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.45);
  transform: translateY(-24px);
  opacity: 0;
  animation: slideIn 300ms ease forwards;
}

.modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  border: none;
  background: rgba(255, 255, 255, 0.18);
  width: 40px;
  height: 40px;
  border-radius: 999px;
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  transition: transform 150ms ease, background 150ms ease;
}

.modal__close:hover {
  background: rgba(255, 255, 255, 0.27);
  transform: scale(1.06);
}

.modal__content form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal__content input {
  padding: 0.75rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 1rem;
}

.modal__content input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.modal__content h2 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  margin: 0 0 0.6rem;
  color: white;
}

.modal__content p {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.6;
  opacity: 0.9;
  color: white;
}

#errorMsg {
  color: white !important;
  display: none;
}

.blink {
  animation: blink 1s 5;
}

@keyframes blink {
  0%, 50% {
    opacity: 1;
  }
  51%, 100% {
    opacity: 0;
  }
}

.modal__content label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: white;
  font-size: 0.9rem;
}

.modal__content button {
  padding: 0.75rem;
  border-radius: 8px;
  border: none;
  background: white;
  color: black;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease;
}

.admin-panel {
  margin: 2rem 0;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  backdrop-filter: blur(10px);
}

.admin-panel h2 {
  margin-top: 0;
  color: var(--text);
}

.admin-panel input, .admin-panel button, .admin-panel select {
  margin: 0.5rem 0;
  padding: 0.5rem;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

.admin-panel button {
  background: var(--bg1);
  color: white;
  cursor: pointer;
}

.admin-panel button:hover {
  background: var(--bg2);
}

.admin-panel ul {
  list-style: none;
  padding: 0;
}

.admin-panel li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  margin: 0.5rem 0;
  border-radius: 4px;
}

#adminPanel input, #adminPanel select, #adminPanel button {
  margin: 0.5rem 0;
  padding: 0.5rem;
  border-radius: 4px;
  border: 1px solid #ccc;
}

#adminPanel button {
  background: #007bff;
  color: white;
  border: none;
  cursor: pointer;
}

#adminPanel button:hover {
  background: #0056b3;
}

@keyframes slideIn {
  from {
    transform: translateY(-24px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@media (max-width: 520px) {
  .card__header {
    flex-direction: column;
    text-align: center;
  }

  .subtitle {
    text-align: center;
    margin-top: 0.5rem;
  }

  .card__body {
    padding: 0 1.5rem 2.4rem;
  }

  .panel {
    padding: 1.2rem 1rem;
    font-size: 0.95rem;
  }
}

/* Marca de agua deslizante */
@keyframes watermark-slide {
  0% {
    transform: translateX(-100%) translateY(-100%) rotate(-15deg);
  }
  50% {
    transform: translateX(50%) translateY(50%) rotate(-15deg);
  }
  100% {
    transform: translateX(120%) translateY(120%) rotate(-15deg);
  }
}

.watermark {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  opacity: 0.08;
  z-index: -2;
  pointer-events: none;
  transform: translate(-50%, -50%);
  animation: watermark-slide 20s linear infinite;
}

.watermark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}