/* -------------------------------------------------- */
/*  Design tokens                                      */
/* -------------------------------------------------- */
:root {
  --bg: #0a0c12;
  --surface: #12151e;
  --surface-up: #181c28;
  --border: #1f2436;
  --border-light: #2a3048;
  --text: #c8cee0;
  --text-muted: #8890a4;
  --text-dim: #6b7394;
  --text-faint: #3d4260;
  --blue: #5b8af5;
  --blue-dim: rgba(91, 138, 245, 0.15);
  --font-body: 'DM Sans', sans-serif;
  --font-display: 'Outfit', sans-serif;

  --tier-s: #c53030;
  --tier-a: #c05621;
  --tier-b: #b7791f;
  --tier-c: #2f855a;
  --tier-d: #2b6cb0;
  --tier-f: #4a5568;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* -------------------------------------------------- */
/*  Backdrop                                           */
/* -------------------------------------------------- */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.backdrop::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, #1a1f30 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.3;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: orbFloat 20s ease-in-out infinite;
}

.orb-1 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--blue), transparent 70%);
  top: -10%; left: -5%;
}

.orb-2 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #a06ef5, transparent 70%);
  bottom: 10%; right: -5%;
  animation-delay: -10s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(25px, -15px) scale(1.04); }
  66% { transform: translate(-15px, 10px) scale(0.96); }
}

/* -------------------------------------------------- */
/*  Header                                             */
/* -------------------------------------------------- */
header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: linear-gradient(180deg, rgba(22, 26, 38, 0.95), rgba(18, 21, 30, 0.9));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.home-link {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: -0.3px;
  transition: color 0.15s;
  flex-shrink: 0;
}
.home-link:visited { color: var(--text-dim); }
.home-link:hover { color: var(--blue); }

h1 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

.header-actions {
  margin-left: auto;
  display: flex;
  gap: 8px;
}

.header-btn {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}
.header-btn:hover {
  color: var(--text);
  border-color: var(--border-light);
  background: var(--surface-up);
}

/* -------------------------------------------------- */
/*  Main                                               */
/* -------------------------------------------------- */
main {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px 40px;
}

/* -------------------------------------------------- */
/*  Tierlist                                           */
/* -------------------------------------------------- */
.tierlist {
  display: flex;
  flex-direction: column;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
}

.tier-row {
  display: flex;
  min-height: 72px;
  border-bottom: 1px solid var(--border);
}
.tier-row:last-child { border-bottom: none; }

.tier-label {
  width: 64px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
  user-select: none;
}

.tier-label[data-tier="S"] { background: var(--tier-s); }
.tier-label[data-tier="A"] { background: var(--tier-a); }
.tier-label[data-tier="B"] { background: var(--tier-b); }
.tier-label[data-tier="C"] { background: var(--tier-c); }
.tier-label[data-tier="D"] { background: var(--tier-d); }
.tier-label[data-tier="F"] { background: var(--tier-f); }

.tier-drop {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 4px;
  padding: 6px;
  min-height: 72px;
  transition: background 0.15s;
}

.tier-drop .portrait {
  width: 64px;
  aspect-ratio: 1;
}

.tier-drop.drag-over {
  background: rgba(91, 138, 245, 0.08);
}

/* -------------------------------------------------- */
/*  Character portraits                                */
/* -------------------------------------------------- */
.portrait {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 6px;
  overflow: hidden;
  cursor: grab;
  position: relative;
  border: 2px solid transparent;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  flex-shrink: 0;
}

.portrait:hover {
  border-color: var(--blue);
  transform: scale(1.08);
  box-shadow: 0 4px 12px rgba(91, 138, 245, 0.3);
  z-index: 2;
}

.portrait:active { cursor: grabbing; }

.portrait.selected {
  border-color: var(--blue);
  box-shadow: 0 0 0 2px var(--blue), 0 4px 16px rgba(91, 138, 245, 0.4);
}

.portrait.dragging { opacity: 0.4; }

.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  display: block;
  pointer-events: none;
}

/* -------------------------------------------------- */
/*  Hint                                               */
/* -------------------------------------------------- */
.hint {
  font-size: 12px;
  color: var(--text-faint);
  margin: 12px 0 0;
  line-height: 1.5;
}

/* -------------------------------------------------- */
/*  Pool                                               */
/* -------------------------------------------------- */
.pool-section {
  margin-top: 20px;
}

.pool-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.pool-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.pool-filters {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1;
}

.pool-filters select,
.pool-filters input {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: #fff;
  font-family: var(--font-body);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.pool-filters select {
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  padding-right: 28px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%236b7394' stroke-width='2'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.pool-filters select:focus,
.pool-filters input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 10px rgba(91, 138, 245, 0.2);
}

.pool-filters input::placeholder { color: var(--text-dim); }
.pool-filters input { max-width: 200px; }

.pool-filters select option {
  background: var(--surface);
  color: #fff;
}

.pool {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 6px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  min-height: 80px;
  transition: background 0.15s;
}

.pool.drag-over {
  background: rgba(91, 138, 245, 0.06);
}

/* -------------------------------------------------- */
/*  Responsive                                         */
/* -------------------------------------------------- */
@media (max-width: 700px) {
  header { padding: 12px 16px; gap: 12px; }
  h1 { font-size: 16px; }
  main { padding: 12px 12px 32px; }
  .tier-label { width: 48px; font-size: 18px; }
  .tier-drop { min-height: 56px; padding: 4px; gap: 3px; }
  .pool { padding: 10px; gap: 4px; }
}

@media (max-width: 400px) {
  .tier-label { width: 40px; font-size: 16px; }
}