/* ===== Light theme (default) ===== */
:root,
[data-theme="light"] {
  --bg-base: #fdf2f8;
  --bg-mid: #fce7f3;
  --bg-overlay: rgba(253, 242, 248, 0.88);
  --sky-top: #fce4ec;
  --sky-mid: #e0f7fa;
  --sky-bottom: #f3e5f5;
  --pink: #e91e8c;
  --pink-glow: #ff6ec7;
  --cyan: #00bcd4;
  --cyan-glow: #4dd0e1;
  --purple: #9c27b0;
  --text: #2d1b4e;
  --text-dim: #6b5b8a;
  --card-bg: rgba(255, 255, 255, 0.82);
  --card-bg-hover: rgba(255, 255, 255, 0.95);
  --card-border: rgba(233, 30, 140, 0.25);
  --grid-color-pink: rgba(233, 30, 140, 0.22);
  --grid-color-cyan: rgba(0, 188, 212, 0.22);
  --grid-purple: rgba(156, 39, 176, 0.38);
  --grid-purple-bright: rgba(186, 85, 211, 0.55);
  --scanline-color: rgba(45, 27, 78, 0.04);
  --mountain-opacity: 0.22;
  --sun-opacity: 0.75;
  --neon-shadow-pink: rgba(233, 30, 140, 0.45);
  --neon-shadow-cyan: rgba(0, 188, 212, 0.45);
  --toggle-bg: rgba(255, 255, 255, 0.75);
  --toggle-border: rgba(233, 30, 140, 0.3);
  --bar-track: rgba(45, 27, 78, 0.12);
}

/* ===== Dark theme ===== */
[data-theme="dark"] {
  --bg-base: #0a0014;
  --bg-mid: #12001f;
  --bg-overlay: rgba(10, 0, 20, 0.82);
  --sky-top: #1a0033;
  --sky-mid: #0d0020;
  --sky-bottom: #0a0014;
  --pink: #ff2d95;
  --pink-glow: #ff6ec7;
  --cyan: #00f0ff;
  --cyan-glow: #7df9ff;
  --purple: #9d4edd;
  --text: #e8d5f2;
  --text-dim: #a78bba;
  --card-bg: rgba(18, 0, 31, 0.78);
  --card-bg-hover: rgba(25, 0, 45, 0.9);
  --card-border: rgba(255, 45, 149, 0.35);
  --grid-color-pink: rgba(255, 45, 149, 0.18);
  --grid-color-cyan: rgba(0, 240, 255, 0.18);
  --grid-purple: rgba(157, 78, 221, 0.42);
  --grid-purple-bright: rgba(199, 125, 255, 0.6);
  --scanline-color: rgba(0, 0, 0, 0.12);
  --mountain-opacity: 0.35;
  --sun-opacity: 0.55;
  --neon-shadow-pink: rgba(255, 45, 149, 0.5);
  --neon-shadow-cyan: rgba(0, 240, 255, 0.5);
  --toggle-bg: rgba(18, 0, 31, 0.75);
  --toggle-border: rgba(255, 45, 149, 0.35);
  --bar-track: rgba(255, 255, 255, 0.1);
}

/* ===== Shared tokens ===== */
:root {
  --font-display: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "Consolas", "Courier New", monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-display);
  background: var(--bg-base);
  color: var(--text);
  min-height: 100dvh;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===== Synthwave background ===== */
.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg__sky {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    var(--sky-top) 0%,
    var(--sky-mid) 45%,
    var(--sky-bottom) 100%
  );
  transition: background 0.4s ease;
}

.bg__stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 22% 12%, var(--cyan) 50%, transparent 50%),
    radial-gradient(1px 1px at 38% 8%, var(--pink) 50%, transparent 50%),
    radial-gradient(1.5px 1.5px at 50% 14%, white 50%, transparent 50%),
    radial-gradient(1px 1px at 62% 9%, var(--cyan) 50%, transparent 50%),
    radial-gradient(1px 1px at 78% 13%, var(--pink) 50%, transparent 50%),
    radial-gradient(1px 1px at 44% 24%, white 50%, transparent 50%),
    radial-gradient(1px 1px at 56% 21%, var(--cyan) 50%, transparent 50%);
}

.bg__sun {
  position: absolute;
  bottom: 22%;
  left: 50%;
  width: min(420px, 65vw);
  height: min(420px, 65vw);
  border-radius: 50%;
  background: linear-gradient(
    to bottom,
    var(--pink) 0%,
    var(--pink-glow) 28%,
    var(--purple) 58%,
    var(--bg-base) 100%
  );
  transform: translateX(-50%);
  box-shadow:
    0 0 50px var(--pink),
    0 0 100px var(--neon-shadow-pink);
  mask-image: linear-gradient(to bottom, black 45%, transparent 100%);
  opacity: var(--sun-opacity);
}

/* Grid vintage en el cielo (líneas horizontales convergentes) */
.bg__grid-sky {
  position: absolute;
  bottom: 21%;
  left: 50%;
  width: min(1100px, 160vw);
  height: 38%;
  transform: translateX(-50%) perspective(280px) rotateX(52deg);
  transform-origin: center bottom;
  background: repeating-linear-gradient(
    to bottom,
    transparent,
    transparent 22px,
    var(--grid-purple) 22px,
    var(--grid-purple-bright) 23px
  );
  mask-image: linear-gradient(to bottom, transparent 5%, black 45%, black 75%, transparent 100%);
  opacity: 0.55;
}

/* Línea de horizonte neón */
.bg__horizon {
  position: absolute;
  bottom: 22%;
  left: 50%;
  transform: translateX(-50%);
  width: min(720px, 92vw);
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--grid-purple-bright) 20%,
    var(--purple) 50%,
    var(--grid-purple-bright) 80%,
    transparent 100%
  );
  box-shadow:
    0 0 12px var(--purple),
    0 0 28px var(--grid-purple-bright);
}

/* Grid de suelo en perspectiva (morado vintage) */
.bg__grid {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: min(1400px, 220vw);
  height: 58%;
  background-image:
    linear-gradient(var(--grid-purple) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-purple) 1px, transparent 1px);
  background-size: 56px 56px;
  transform: translateX(-50%) perspective(480px) rotateX(70deg);
  transform-origin: center bottom;
  mask-image: linear-gradient(to top, black 18%, transparent 92%);
}

.bg__mountains {
  position: absolute;
  bottom: 18%;
  left: 50%;
  transform: translateX(-50%);
  width: min(960px, 110vw);
  height: 28%;
  opacity: var(--mountain-opacity);
  background:
    linear-gradient(135deg, transparent 42%, var(--purple) 42%, var(--purple) 58%, transparent 58%) 8% 100% / 15% 82% no-repeat,
    linear-gradient(-135deg, transparent 42%, var(--pink) 42%, var(--pink) 58%, transparent 58%) 24% 100% / 13% 68% no-repeat,
    linear-gradient(135deg, transparent 42%, var(--cyan) 42%, var(--cyan) 58%, transparent 58%) 50% 100% / 16% 100% no-repeat,
    linear-gradient(-135deg, transparent 42%, var(--pink) 42%, var(--pink) 58%, transparent 58%) 76% 100% / 13% 68% no-repeat,
    linear-gradient(135deg, transparent 42%, var(--purple) 42%, var(--purple) 58%, transparent 58%) 92% 100% / 15% 82% no-repeat;
}

.bg__scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    var(--scanline-color) 2px,
    var(--scanline-color) 4px
  );
}

/* ===== Theme toggle ===== */
.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1100;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--toggle-border);
  background: var(--toggle-bg);
  backdrop-filter: blur(10px);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.3s ease,
    border-color 0.3s ease;
  -webkit-tap-highlight-color: transparent;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  transform: scale(1.08);
  box-shadow: 0 0 18px var(--neon-shadow-cyan);
  outline: none;
}

.theme-toggle__icon {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.theme-toggle__icon--sun {
  opacity: 1;
  transform: rotate(0deg);
}

.theme-toggle__icon--moon {
  opacity: 0;
  transform: rotate(-30deg) scale(0.8);
}

[data-theme="dark"] .theme-toggle__icon--sun {
  opacity: 0;
  transform: rotate(30deg) scale(0.8);
}

[data-theme="dark"] .theme-toggle__icon--moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ===== Loader ===== */
.loader {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  transition: opacity 0.6s ease, visibility 0.6s ease, background 0.4s ease;
}

.loader--hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
}

.loader__logo {
  font-size: clamp(2.5rem, 10vw, 4rem);
  font-weight: 900;
  letter-spacing: 0.15em;
  margin-bottom: 2rem;
}

.loader__neon {
  color: var(--pink);
  text-shadow:
    0 0 10px var(--pink),
    0 0 30px var(--pink-glow),
    0 0 60px var(--neon-shadow-pink);
  animation: neonFlicker 1.5s ease-in-out infinite alternate;
}

.loader__hop {
  color: var(--cyan);
  text-shadow:
    0 0 10px var(--cyan),
    0 0 30px var(--cyan-glow),
    0 0 60px var(--neon-shadow-cyan);
}

.loader__bar {
  width: min(280px, 70vw);
  height: 4px;
  background: var(--bar-track);
  border-radius: 2px;
  margin: 0 auto 1rem;
  overflow: hidden;
  box-shadow: 0 0 10px var(--neon-shadow-pink);
}

.loader__bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--pink), var(--cyan));
  border-radius: 2px;
  animation: loadBar 1.5s ease-in-out forwards;
  box-shadow: 0 0 15px var(--pink-glow);
}

.loader__text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.loader__dots::after {
  content: "";
  animation: dots 1s steps(4, end) infinite;
}

/* ===== Main content ===== */
.main {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.8s ease 0.2s;
}

.main--visible {
  opacity: 1;
}

.container {
  width: 100%;
  max-width: 480px;
  padding: 2rem 1.25rem 3rem;
}

.header {
  margin-bottom: 2.5rem;
}

.header__profile {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.85rem, 4vw, 1.35rem);
}

.header__avatar {
  flex-shrink: 0;
  width: auto;
  height: clamp(100px, 26vw, 150px);
  display: block;
  object-fit: contain;
  filter:
    drop-shadow(0 0 2px var(--pink))
    drop-shadow(0 0 3px var(--pink-glow));
  transition: filter 0.3s ease;
}

.header__info {
  text-align: left;
}

.title {
  font-size: clamp(1.75rem, 7.5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: 0.12em;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.title__neon {
  display: inline-block;
  color: var(--pink);
  text-shadow:
    0 0 10px var(--pink),
    0 0 25px var(--pink-glow),
    0 0 50px var(--neon-shadow-pink);
}

.title__hop {
  display: inline-block;
  color: var(--cyan);
  text-shadow:
    0 0 10px var(--cyan),
    0 0 25px var(--cyan-glow),
    0 0 50px var(--neon-shadow-cyan);
}

.subtitle {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.links {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.link-card:hover,
.link-card:focus-visible {
  transform: translateY(-2px) scale(1.01);
  border-color: var(--cyan);
  box-shadow:
    0 0 20px var(--neon-shadow-cyan),
    inset 0 0 20px var(--neon-shadow-pink);
  background: var(--card-bg-hover);
  outline: none;
}

.link-card:active {
  transform: translateY(0) scale(0.99);
}

.link-card__icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--neon-shadow-pink), var(--neon-shadow-cyan));
  color: var(--text);
  transition: color 0.2s ease, box-shadow 0.2s ease;
}

.link-card__icon svg {
  width: 24px;
  height: 24px;
}

.link-card:hover .link-card__icon,
.link-card:focus-visible .link-card__icon {
  color: var(--cyan);
  box-shadow: 0 0 15px var(--neon-shadow-cyan);
}

.link-card__name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.link-card__handle {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
  letter-spacing: 0.05em;
}

.footer {
  text-align: center;
  margin-top: 2.5rem;
}

.footer p {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  opacity: 0.7;
}

/* ===== Animations ===== */
@keyframes loadBar {
  0% { width: 0%; }
  30% { width: 40%; }
  60% { width: 75%; }
  100% { width: 100%; }
}

@keyframes dots {
  0%  { content: ""; }
  25% { content: "."; }
  50% { content: ".."; }
  75% { content: "..."; }
}

@keyframes neonFlicker {
  0%, 100% { opacity: 1; }
  92% { opacity: 1; }
  93% { opacity: 0.8; }
  94% { opacity: 1; }
  96% { opacity: 0.9; }
  97% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .loader__bar-fill {
    width: 100%;
  }
}

@media (min-width: 600px) {
  .container {
    max-width: 420px;
    padding: 3rem 2rem;
  }

  .link-card {
    padding: 1.1rem 1.5rem;
  }
}