:root {
  /* MAIN PALETTE – Underwater theme */
  --navy-deep: #01162b;
  /* very dark */
  --navy: #00385a;
  --blue-mid: #6a90b4;
  --blue-soft: #94a2bf;
  --ice: #d2dbeb;

  /* THEME MAPPING */
  --bg: #d2dbeb;
  /* page background */
  --panel: rgba(1, 22, 43, 0.92);
  /* card background */
  --panel-soft: #f5f7fb;
  /* light inner areas if needed */

  --accent: #6a90b4;
  /* primary buttons, links */
  --accent-soft: #94a2bf;
  --accent-glow: rgba(148, 162, 191, 0.7);

  --text-main: #f5f7fb;
  /* main text on dark panels */
  --text-muted: #94a2bf;
  /* subtle labels */
  --input-bg: rgba(1, 22, 43, 0.75);
  --input-border: #6a90b4;
  --danger: #c94949;

  /* BOARD & STONE COLORS */
  --yellow: #FFD533;
  --stone-black: #1C4EA7;
  /* Prussian Blue for black pieces */
  --stone-white: #D9F5F0;
  /* Light cyan for white pieces */
  --line: #0c2b2aff;
  /* board line color */
}


* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  color: var(--text-main);
}

/* Fullscreen animated gradient behind auth card */
.auth-bg {
  position: fixed;
  inset: 0;
  z-index: -3;
  background: radial-gradient(circle at 20% 0%, #d2dbeb 0, #6a90b4 45%, #00385a 75%, #01162b 100%);
  background-size: 200% 200%;
  animation: oceanGradient 18s ease-in-out infinite alternate;
  ;
}

/* Soft moving glow layers */
.auth-bg::before,
.auth-bg::after {
  content: "";
  position: absolute;
  width: 60vmax;
  height: 60vmax;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(148, 162, 191, 0.4), transparent 60%);
  mix-blend-mode: screen;
  opacity: 0.6;
  animation: drift 26s linear infinite;
}

.auth-bg::after {
  width: 40vmax;
  height: 40vmax;
  background: radial-gradient(circle, rgba(106, 144, 180, 0.6), transparent 65%);
  animation-duration: 32s;
  animation-direction: reverse;
}

@keyframes oceanGradient {
  0% {
    background-position: 0% 0%;
  }

  50% {
    background-position: 50% 80%;
  }

  100% {
    background-position: 100% 20%;
  }
}

@keyframes drift {
  0% {
    transform: translate(-20%, -10%);
  }

  50% {
    transform: translate(30%, 20%);
  }

  100% {
    transform: translate(-10%, 40%);
  }
}

/* Bigger, softer bubbles */
.auth-bubbles {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

/* style.css */

.auth-bubble,
.lobby-bubble {
  position: absolute;
  border-radius: 50%;
  overflow: hidden;
  /* for images */
  border: 1px solid rgba(210, 219, 235, 0.7);
  background: transparent;
  /* image will fill */
  box-shadow: 0 0 18px rgba(210, 219, 235, 0.75),
    0 0 40px rgba(148, 162, 191, 0.5);
  opacity: 0;
  animation: bubbleRise 26s linear infinite;
  /* login */
}

/* keep your separate animation + duration for lobby/game/profile */
.lobby-bubble {
  animation: lobbyBubbleRise 26s linear infinite;
}

/* optional small/large shortcuts still work */
.auth-bubble.sm,
.lobby-bubble.sm {
  --size: 30px;
  animation-duration: 22s;
}

.auth-bubble.lg,
.lobby-bubble.lg {
  --size: 86px;
  animation-duration: 30s;
}

/* image inside each bubble */
.bubble-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}


@keyframes bubbleRise {
  0% {
    transform: translate3d(var(--x-start), 105vh, 0) scale(0.85);
    opacity: 0;
  }

  15% {
    opacity: 0.7;
  }

  60% {
    opacity: 0.6;
  }

  100% {
    transform: translate3d(var(--x-end), -20vh, 0) scale(1.15);
    opacity: 0;
  }
}



/* Soft horizontal wave bands */
.auth-waves {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
}

/* Each band is a wide, blurred strip that moves gently */
.auth-wave {
  position: absolute;
  left: -10%;
  width: 120%;
  height: 18vh;
  border-radius: 50%;
  filter: blur(14px);
  opacity: 0.55;
  background: linear-gradient(to right,
      rgba(0, 56, 90, 0.0),
      rgba(0, 56, 90, 0.75),
      rgba(106, 144, 180, 0.9),
      rgba(148, 162, 191, 0.0));
  animation: waveDrift 30s ease-in-out infinite;
}

.auth-wave.mid {
  height: 22vh;
  background: linear-gradient(to right,
      rgba(1, 22, 43, 0.0),
      rgba(1, 22, 43, 0.85),
      rgba(0, 56, 90, 0.8),
      rgba(106, 144, 180, 0.0));
  animation-duration: 38s;
}

.auth-wave.top {
  height: 16vh;
  background: linear-gradient(to right,
      rgba(210, 219, 235, 0.0),
      rgba(148, 162, 191, 0.55),
      rgba(210, 219, 235, 0.0));
  animation-duration: 46s;
  opacity: 0.45;
}

@keyframes waveDrift {
  0% {
    transform: translate3d(-8%, 0, 0);
  }

  50% {
    transform: translate3d(10%, -8%, 0);
  }

  100% {
    transform: translate3d(-6%, 4%, 0);
  }
}

.auth-foreground {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
  z-index: 0;
  /* above background layers */
}


/* form*/

.auth-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

/* Left logo cluster */
.auth-header-logos {
  display: flex;
  align-items: center;
  gap: 6px;
}

.auth-logo {
  width: 42px;
  height: 42px;
  border-radius: 20px;
  object-fit: cover;
  box-shadow: 0 0 10px rgba(210, 219, 235, 0.6);
  border: 1px solid rgba(148, 162, 191, 0.5);
}

/* Slightly offset second logo for layered effect */
.auth-logo.second {
  transform: translateY(2px);
  opacity: 0.9;
}

/* Text stack on the right of logos */
.auth-header-text {
  display: flex;
  flex-direction: column;
}

.auth-title {
  font-size: 24px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0;
  font-family: Charm;
}

.auth-subtitle {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--text-muted);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  padding: 32px 30px 28px;
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(1, 22, 43, 0.96), rgba(0, 56, 90, 0.96));
  box-shadow:
    0 22px 45px rgba(1, 22, 43, 0.8),
    0 0 40px rgba(106, 144, 180, 0.6);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(148, 162, 191, 0.5);
}

.auth-title {
  font-size: 30px;
  letter-spacing: 0.08em;
  text-align: center;
  margin: 0 0 6px;
}

.auth-subtitle {
  text-align: center;
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* Form controls */
.auth-group {
  margin-bottom: 16px;
}

.auth-label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.auth-input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.auth-input::placeholder {
  color: rgba(212, 222, 239, 0.7);
}

.auth-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(148, 162, 191, 0.7);
  background: rgba(1, 22, 43, 0.95);
}

/* Primary button */
.auth-btn {
  width: 100%;
  margin-top: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, #00385a, #6a90b4);
  color: #f7f9ff;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(1, 22, 43, 0.9);
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s;
}

.auth-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(1, 22, 43, 0.9);
}

.auth-btn:active {
  transform: translateY(0);
  box-shadow: 0 8px 20px rgba(1, 22, 43, 0.8);
}

/* Switch link (Login ↔ Register) */
.auth-switch {
  margin-top: 14px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

.auth-switch a {
  color: var(--accent-soft);
  text-decoration: none;
  font-weight: 500;
}

.auth-switch a:hover {
  color: #ffffff;
}

/* Error/success messages */
.auth-message {
  margin-bottom: 10px;
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 8px;
  background: rgba(201, 73, 73, 0.1);
  border: 1px solid rgba(201, 73, 73, 0.4);
  color: #ffbdbd;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
}

h1 {
  margin: 8px 0 4px;
  font-weight: 800;
}

.sub {
  margin: 0 0 16px;
  color: var(--muted);
}

/* CARDS */
.card {
  background: var(--panel);
  border: 1px solid #00000022;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 6px 20px #00000015;
}

.row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

button {
  background: var(--accent);
  border: none;
  color: white;
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s;
}

button:hover {
  opacity: 0.8;
}

button.danger {
  background: var(--danger);
}

input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #00000033;
  background: #fff;
  color: var(--text);
}

.muted {
  color: var(--muted);
}

/* TABLES */
table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th,
td {
  padding: 8px;
  border-bottom: 1px solid #00000022;
}

/* TOPBAR */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.back {
  color: var(--accent);
  text-decoration: none;
}

.grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 12px;
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

/* ===========================
    GAME BOARD
=========================== */
#boardWrap {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  position: relative;
  /* Establish stacking context */
  z-index: 1;
  /* Ensure the board is above the background */
}

#boardWrap::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 439px;
  height: 433px;
  background-image: url('isu.png');
  background-size: contain;
  background-repeat: no-repeat;
  opacity: 0.2;
  /* Reduce opacity for subtle background effect */
  z-index: 0;
  /* Place it behind the board content but within the stacking context */
  pointer-events: none;
  /* Allow interactions with elements below */
}

/* SVG Board Style */
svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  aspect-ratio: 1;

  /* NEW SOFT, LIGHT, NON-DARK BOARD COLORS */
  background: radial-gradient(circle at 50% 40%,
      rgb(73, 49, 73) 0%,
      /* light peach center */
      #cabe1c 45%,
      /* soft peach-brown */
      rgb(73, 49, 73) 75%,
      /* warm tan */
      #cabe1c 100%
      /* medium peach-brown (NO dark brown) */
    );

  border-radius: 18px;
  box-shadow:
    0 2px 12px var(--accent-glow),
    0 8px 20px rgba(0, 0, 0, 0.25);
  border: 3px solid #0c2b2aff;
}


/* Lines */
.line {
  stroke: var(--line);
  /* Gold color to match the logo */
  stroke-width: 2.5;
  /* Slightly thicker lines for better visibility */
  opacity: 0.9;
  /* Slightly transparent to blend with the background */
  filter: drop-shadow(0 0 8px #0000FF);
  /* Glow effect to make lines stand out */
}

/* Points (Circles) */
.point {
  cursor: pointer;
  stroke: rgb(73, 67, 29);
  /* Soft aqua outline to complement the underwater theme */
  stroke-width: 1;
  /* Thicker circle outline */
  filter: drop-shadow(0 0 6px rgb(146, 119, 0));
  /* Glow effect for circles */
  transition: filter 0.2s, stroke 0.2s;
}

/* Empty spot */
.point.empty {
  fill: rgb(238, 215, 85);
  /* Light sky blue fill for empty spots */
  filter: drop-shadow(0 0 6px rgb(146, 119, 0));
  /* Glow effect for empty spots */
}

/* Stones */
.point.red {
  fill: #1C4EA7;
  stroke: #0c2b2aff;
  /* Gold outline for black stones */
  filter: drop-shadow(0 0 10px #0000FF);
  /* Stronger glow effect for stones */
}

.point.white {
  fill: #D9F5F0;
  stroke: #0c2b2aff;
  /* Gold outline for white stones */
  filter: drop-shadow(0 0 10px #0000FF);
  /* Stronger glow effect for stones */
}

.point.sel {
  stroke-width: 1;
  /* Thicker selection outline */
  stroke: #c9d157;
  /* Aqua for selection */
  filter: drop-shadow(0 0 12px #c9d157);
  /* Glow effect for selected points */
}

/* Labels on board */
.label {
  fill: var(--line);
  font-size: 11px;
  font-family: 'Orbitron', 'Segoe UI', Arial, sans-serif;
}

/* Status text */
.status {
  margin-top: 10px;
  display: grid;
  gap: 4px;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--panel);
  border: 1.5px solid var(--accent-glow);
  color: var(--text);
  box-shadow: 0 1px 4px #00000022;
}

.turnW {
  background: var(--stone-white);
  color: #1d1d1d;
}

.turnB {
  background: var(--stone-black);
  color: #fff;
}

/* Winner Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--panel);
  padding: 28px 32px;
  border-radius: 16px;
  box-shadow: 0 5px 25px var(--accent-glow);
  border: 2px solid var(--accent);
  text-align: center;
}

/* Leaderboard colors */
#board tr:nth-child(1) td:nth-child(2) {
  color: #d4af37;
  font-weight: bold;
}

#board tr:nth-child(2) td:nth-child(2) {
  color: #c0c0c0;
  font-weight: bold;
}

#board tr:nth-child(3) td:nth-child(2) {
  color: #cd7f32;
  font-weight: bold;
}

/* Footer */
.site-footer {
  background: #e5d2aa;
  border-top: 2px solid #b08c4a;
  padding: 15px 10px;
  text-align: center;
}

.footer-content {
  max-width: 900px;
  margin: 0 auto;
}

.footer-note {
  font-size: 14px;
  color: #5a3c1c;
  opacity: 0.9;
}