/* ═══════════════════════════════════════════════════════════════════
   tetris.taozi4887.dev  -  shared design system
   Matches the aesthetic of tetris.html (same variables, same fonts)
═══════════════════════════════════════════════════════════════════ */

/* ── Google Fonts ─────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Instrument+Serif:ital@0;1&display=swap');

/* ── CSS Variables ────────────────────────────────────────────── */
:root {
  --bg:        #0a0a0b;
  --bg2:       #111114;
  --bg3:       #1a1a1f;
  --bg4:       #222228;
  --border:    rgba(255,255,255,.07);
  --text:      #e8e8ea;
  --text2:     #888890;
  --text3:     #55555c;
  --accent:    #c8ff4a;
  --accent2:   #ff4a6e;
  --accent3:   #4affda;
  --accent4:   #c87dff;

  /* Piece colours */
  --cyan:   #00f0f0;
  --blue:   #0000f0;
  --orange: #f0a000;
  --yellow: #f0f000;
  --green:  #00f000;
  --purple: #a000f0;
  --red:    #f00000;

  --radius:   8px;
  --radius-lg:16px;
  --shadow:   0 4px 24px rgba(0,0,0,.5);
  --mono:     'DM Mono', monospace;
  --serif:    'Instrument Serif', Georgia, serif;

  /* Rank colours */
  --rank-challenger: #ffd700;  /* gradient via CSS */
  --rank-gm:         #c8ff4a;
  --rank-master:     #b46ff0;
  --rank-diamond:    #60efff;
  --rank-platinum:   #4affda;
  --rank-gold:       #ffd700;
  --rank-silver:     #aaaaaa;
  --rank-bronze:     #cd7f32;
  --rank-iron:       #8a8aa8;
  --rank-unranked:   #55555c;
}

/* ── Reset ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; scrollbar-gutter: stable; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  line-height: 1.6;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: var(--mono); }
input, textarea, select { font-family: var(--mono); }

::-webkit-scrollbar { width: 6px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
  ::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ── Typography ───────────────────────────────────────────────── */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 400; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }
p  { color: var(--text2); }
.mono      { font-family: var(--mono); }
.serif     { font-family: var(--serif); }
.accent    { color: var(--accent); }
.accent2   { color: var(--accent2); }
.accent3   { color: var(--accent3); }
.accent4   { color: var(--accent4); }
.muted     { color: var(--text2); }
.dimmed    { color: var(--text3); }
.small     { font-size: .8rem; }
.upper     { text-transform: uppercase; letter-spacing: .12em; font-size: .75rem; }

/* ── Layout helpers ───────────────────────────────────────────── */
.container   { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.container-sm{ max-width: 640px;  margin: 0 auto; padding: 0 1.5rem; }
.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between{ display: flex; align-items: center; justify-content: space-between; }
.gap-s  { gap: .5rem; }
.gap-m  { gap: 1rem; }
.gap-l  { gap: 1.5rem; }
.gap-xl { gap: 2.5rem; }
.col    { flex-direction: column; }
.wrap   { flex-wrap: wrap; }
.grid   { display: grid; }
.mt-s   { margin-top: .5rem; }
.mt-m   { margin-top: 1rem; }
.mt-l   { margin-top: 1.5rem; }
.mt-xl  { margin-top: 2.5rem; }
.mb-s   { margin-bottom: .5rem; }
.mb-m   { margin-bottom: 1rem; }
.mb-l   { margin-bottom: 1.5rem; }
.center { text-align: center; }
.hidden { display: none !important; }

/* ── Divider ──────────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

/* ── Card ─────────────────────────────────────────────────────── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.card.glass {
  background: rgba(255,255,255,.025);
  backdrop-filter: blur(20px);
}

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .6rem 1.2rem;
  font-size: .85rem; letter-spacing: .06em;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  transition: background .15s, border-color .15s, transform .1s;
}
.btn:hover  { background: var(--bg4); border-color: rgba(255,255,255,.15); }
.btn:active { transform: scale(0.97); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0a0b;
  font-weight: 500;
}
.btn.primary:hover { background: #d4ff6a; border-color: #d4ff6a; }
.btn.danger {
  background: transparent;
  border-color: var(--accent2);
  color: var(--accent2);
}
.btn.danger:hover { background: rgba(255,74,110,.1); }
.btn.ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text2);
}
.btn.ghost:hover { color: var(--text); background: var(--bg3); }
.btn.sm { padding: .4rem .85rem; font-size: .78rem; }
.btn.lg { padding: .85rem 1.75rem; font-size: 1rem; }
.btn[disabled] { opacity: .4; pointer-events: none; }

/* ── Inputs ───────────────────────────────────────────────────── */
.field {
  display: flex; flex-direction: column; gap: .4rem;
}
.field label {
  font-size: .78rem; color: var(--text2);
  text-transform: uppercase; letter-spacing: .1em;
}
.input {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .65rem 1rem;
  color: var(--text);
  font-size: .9rem;
  width: 100%;
  transition: border-color .15s;
}
.input:focus { outline: none; border-color: var(--accent); }
.input::placeholder { color: var(--text3); }
textarea.input { resize: vertical; min-height: 80px; }

/* ── Form ─────────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 1rem; }
.form-error {
  background: rgba(255,74,110,.1);
  border: 1px solid rgba(255,74,110,.3);
  border-radius: var(--radius);
  padding: .65rem 1rem;
  color: var(--accent2);
  font-size: .85rem;
}
.form-success {
  background: rgba(200,255,74,.08);
  border: 1px solid rgba(200,255,74,.25);
  border-radius: var(--radius);
  padding: .65rem 1rem;
  color: var(--accent);
  font-size: .85rem;
}

/* ── Navbar ───────────────────────────────────────────────────── */
#navbar {
  position: sticky; top: 0; z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(10,10,11,.85);
  backdrop-filter: blur(18px);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1100px; margin: 0 auto; padding: .85rem 1.5rem;
}
.nav-logo {
  font-family: var(--serif); font-size: 1.2rem; font-style: italic;
  color: var(--accent); letter-spacing: -.01em;
}
.nav-links { display: flex; align-items: center; gap: .25rem; }
.nav-links a {
  padding: .4rem .75rem;
  font-size: .82rem; color: var(--text2);
  border-radius: var(--radius);
  transition: color .15s, background .15s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--bg3); }
.nav-user { display: flex; align-items: center; gap: .75rem; }
#navAvatarLink { display: inline-flex; align-items: center; }
.nav-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg3); object-fit: cover;
  overflow: hidden; display: flex; align-items: center; justify-content: center;
  font-size: .75rem; color: var(--text2); line-height: 1;
  flex-shrink: 0;
}

/* ── Notification badge (e.g. friend requests) ────────────────── */
.badge-count {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent2); color: #fff;
  font-size: .6rem; font-weight: 700;
  min-width: 1.3em; height: 1.3em; padding: 0 .3em;
  border-radius: 999px; line-height: 1;
  vertical-align: middle; margin-left: .25em;
}

/* ── Hero section ─────────────────────────────────────────────── */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
}
.hero h1 { margin-bottom: 1rem; }
.hero p   { max-width: 520px; margin: 0 auto 2rem; font-size: 1.05rem; }
.hero-btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.hero-tag {
  display: inline-block;
  margin-bottom: 1rem;
  padding: .3rem .8rem;
  border: 1px solid rgba(200,255,74,.25);
  border-radius: 999px;
  font-size: .72rem;
  color: var(--accent);
  letter-spacing: .12em;
  text-transform: uppercase;
}

/* ── Rank badge ───────────────────────────────────────────────── */
.rank-badge {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .2rem .7rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  border: 1px solid currentColor;
}
.rank-badge.Challenger {
  background: linear-gradient(90deg,#fff 0%,#60efff 40%,#ffd700 100%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  border-color: rgba(255,215,0,.45);
  box-shadow: inset 0 0 0 200px rgba(255,215,0,.06);
}
.rank-badge.Grandmaster { color: var(--rank-gm);         border-color: rgba(200,255,74,.35);  background: rgba(200,255,74,.08); }
.rank-badge.Master      { color: var(--rank-master);      border-color: rgba(180,111,240,.35); background: rgba(180,111,240,.08); }
.rank-badge.Diamond     { color: var(--rank-diamond);     border-color: rgba(96,239,255,.35);  background: rgba(96,239,255,.08); }
.rank-badge.Platinum    { color: var(--rank-platinum);    border-color: rgba(74,255,218,.35);  background: rgba(74,255,218,.08); }
.rank-badge.Gold        { color: var(--rank-gold);        border-color: rgba(255,215,0,.35);   background: rgba(255,215,0,.08); }
.rank-badge.Silver      { color: var(--rank-silver);      border-color: rgba(170,170,170,.35); background: rgba(170,170,170,.08); }
.rank-badge.Bronze      { color: var(--rank-bronze);      border-color: rgba(205,127,50,.35);  background: rgba(205,127,50,.08); }
.rank-badge.Iron        { color: var(--rank-iron);        border-color: rgba(138,138,168,.35); background: rgba(138,138,168,.08); }
.rank-badge.Unranked    { color: var(--rank-unranked);    border-color: rgba(85,85,92,.35);    background: transparent; }

/* ── ELO number ───────────────────────────────────────────────── */
.elo-number { font-size: 2rem; font-weight: 500; color: var(--accent); font-variant-numeric: tabular-nums; word-break: break-word; }

/* ── Level badge ──────────────────────────────────────────────── */
@keyframes lvlPulse {
  0%,100% { box-shadow: 0 0 4px 1px currentColor; }
  50%     { box-shadow: 0 0 10px 3px currentColor; }
}
@keyframes lvlRotate {
  from { filter: hue-rotate(0deg); }
  to   { filter: hue-rotate(360deg); }
}
@keyframes lvlRainbow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.lvl-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 3px;
  font-size: .6rem;
  font-weight: 700;
  font-family: monospace;
  line-height: 1;
  user-select: none;
  vertical-align: middle;
  flex-shrink: 0;
}

/* Iron — grey circle */
.lvl-badge.lvl-iron {
  background: #2e2e38; color: #9898a8;
  border: 1.5px solid #5a5a6e;
  border-radius: 50%;
}
/* Bronze — warm rounded square */
.lvl-badge.lvl-bronze {
  background: #2d1e0e; color: #cd853c;
  border: 1.5px solid #a0622a;
  border-radius: 5px;
}
/* Silver — cool square */
.lvl-badge.lvl-silver {
  background: #1e1e2a; color: #c0c0d0;
  border: 1.5px solid #888899;
  border-radius: 2px;
}
/* Gold — hexagon */
.lvl-badge.lvl-gold {
  background: #2a1e00; color: #ffd700;
  border: 1.5px solid #c8a000;
  clip-path: polygon(50% 0%,100% 25%,100% 75%,50% 100%,0% 75%,0% 25%);
}
/* Platinum — diamond */
.lvl-badge.lvl-platinum {
  background: #001a1a; color: #4affda;
  border: 1.5px solid #2addb8;
  clip-path: polygon(50% 0%,100% 50%,50% 100%,0% 50%);
  min-width: 24px; height: 24px;
}
/* Diamond — glowing hexagon */
.lvl-badge.lvl-diamond {
  background: #001828; color: #60efff;
  border: 1.5px solid #30cfef;
  clip-path: polygon(50% 0%,100% 25%,100% 75%,50% 100%,0% 75%,0% 25%);
  animation: lvlPulse 2s ease-in-out infinite;
}
/* Master — purple animated */
.lvl-badge.lvl-master {
  background: linear-gradient(135deg,#1a0030,#2e0050);
  color: #df8aff;
  border: 1.5px solid #b46bf0;
  border-radius: 3px;
  animation: lvlRotate 4s linear infinite;
}
/* Challenger — rainbow animated */
.lvl-badge.lvl-challenger {
  background: linear-gradient(270deg,#ff6b6b,#ffd700,#60efff,#b46bf0,#ff6b6b);
  background-size: 400% 400%;
  color: #fff;
  border: none;
  border-radius: 4px;
  animation: lvlRainbow 3s ease infinite;
  text-shadow: 0 0 4px rgba(0,0,0,.8);
}

/* XP progress bar (profile page only) */
.xp-bar-section {
  margin-top: .6rem;
  width: 100%;
  max-width: 280px;
}
.xp-bar-label {
  font-size: .7rem;
  color: var(--text3);
  margin-bottom: .3rem;
  display: flex;
  gap: .4rem;
  align-items: center;
}
.xp-bar-outer {
  width: 100%;
  height: 6px;
  background: var(--bg3);
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.xp-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #60efff);
  border-radius: 3px;
  transition: width .5s ease;
}

/* XP end-screen panel */
.xp-gain-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .25rem;
  padding: .5rem .8rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: .78rem;
  color: var(--text2);
  min-width: 140px;
  margin-top: .5rem;
}
.xp-gain-amount {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}
.xp-level-up-banner {
  color: #ffd700;
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* ── Avatar ───────────────────────────────────────────────────── */
.avatar {
  width: 80px; height: 80px; border-radius: 50%;
  background: var(--bg3); border: 2px solid var(--border);
  object-fit: cover; display: flex; align-items: center; justify-content: center;
}
.avatar.lg  { width: 120px; height: 120px; }
.avatar.sm  { width: 40px; height: 40px; }
.avatar.placeholder::after {
  content: attr(data-initials);
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%;
  font-size: 1.5rem; color: var(--text3);
}

/* ── Stats grid ───────────────────────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: .75rem;
}
.stat-cell {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .85rem 1rem;
}
.stat-cell .label {
  font-size: .7rem; color: var(--text3);
  text-transform: uppercase; letter-spacing: .1em;
  margin-bottom: .25rem;
}
.stat-cell .value {
  font-size: 1.15rem; color: var(--text); font-weight: 500;
  font-variant-numeric: tabular-nums;
  overflow-wrap: break-word;
  word-break: break-word;
  min-width: 0;
}

/* ── Table ────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table {
  width: 100%; border-collapse: collapse;
  font-size: .85rem;
}
thead th {
  padding: .65rem 1rem;
  text-align: left;
  color: var(--text3);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  border-bottom: 1px solid var(--border);
  font-weight: 400;
}
tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background .12s;
}
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: rgba(255,255,255,.03); }
tbody td {
  padding: .7rem 1rem;
  color: var(--text);
}
tbody td.muted { color: var(--text2); }
.rank-num { color: var(--text3); font-size: .8rem; }
.rank-num.top-3 { color: var(--accent); font-weight: 500; }

/* ── Match history ────────────────────────────────────────────── */
.match-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: .8rem 0;
  font-size: .85rem;
}
.match-row:last-child { border-bottom: none; }
.match-mode {
  font-size: .7rem; color: var(--text3);
  text-transform: uppercase; letter-spacing: .08em;
}
.match-result.win  { color: var(--accent);  }
.match-result.loss { color: var(--accent2); }
.match-result.draw { color: var(--text2);   }
.match-elo.pos { color: var(--accent); }
.match-elo.neg { color: var(--accent2); }

/* ── Friend card ──────────────────────────────────────────────── */
.friend-card {
  display: flex; align-items: center; gap: 1.25rem;
  padding: .9rem 1.25rem;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius);
}
.friend-card .info { flex: 1; min-width: 0; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.friend-card .name {
    display: flex; align-items: center; gap: .5rem;
  font-size: .9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.friend-card .elo-small { font-size: .78rem; color: var(--text2); display: flex; align-items: center; gap: 0.5rem;}
.friend-card .actions { display: flex; gap: .5rem; flex-shrink: 0; }
.friend-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .6rem;
}

/* ── Challenge / inbox ────────────────────────────────────────── */
.challenge-item {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .85rem;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius);
}
.challenge-from { font-size: .85rem; }
.challenge-mode {
  font-size: .7rem; color: var(--text3);
  text-transform: uppercase; letter-spacing: .08em;
}
.challenge-actions { display: flex; gap: .5rem; }

/* ── Tabs ─────────────────────────────────────────────────────── */
.tabs {
  display: flex; gap: .25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}
.tab-btn {
  padding: .55rem 1rem;
  font-size: .82rem; color: var(--text2);
  background: none; border: none;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
  margin-bottom: -1px;
}
.tab-btn:hover  { color: var(--text); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Toast ────────────────────────────────────────────────────── */
#toast-container {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  z-index: 9999; display: flex; flex-direction: column; gap: .5rem;
  pointer-events: none;
}
.toast {
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .65rem 1.1rem;
  font-size: .82rem; color: var(--text);
  box-shadow: var(--shadow);
  animation: toastIn .2s ease;
  pointer-events: auto;
}
.toast.success { border-left: 3px solid var(--accent); }
.toast.error   { border-left: 3px solid var(--accent2); }
.toast-btn {
  display: inline-block; font-size: .73rem; font-family: var(--mono);
  padding: .25rem .7rem; border-radius: var(--radius);
  background: var(--accent); color: #000; border: none; cursor: pointer;
  text-decoration: none; transition: opacity .15s;
}
.toast-btn:hover { opacity: .85; }
.toast-btn-ghost {
  background: transparent; color: var(--text2);
  border: 1px solid var(--border);
}
@keyframes toastIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Loading spinner ──────────────────────────────────────────── */
.spinner {
  width: 32px; height: 32px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Page loader ──────────────────────────────────────────────── */
#page-loader {
  position: fixed; inset: 0; z-index: 9998;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .3s;
}
#page-loader.done { opacity: 0; pointer-events: none; }

/* ── Auth pages ───────────────────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  gap: 2rem; padding: 2rem 1rem;
}
.auth-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 100%; max-width: 400px;
}
.auth-title { font-family: var(--serif); font-size: 1.6rem; margin-bottom: 1.5rem; }
.auth-footer { text-align: center; font-size: .82rem; color: var(--text2); }
.auth-footer a { color: var(--accent); }

/* ── Section divider ──────────────────────────────────────────── */
.section { padding: 4rem 0; }
.section-title {
  font-size: 1rem; font-family: var(--mono);
  color: var(--text3); text-transform: uppercase; letter-spacing: .14em;
  margin-bottom: 1rem;
}

/* ── Page header ──────────────────────────────────────────────── */
.page-header {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

/* ── Footer ───────────────────────────────────────────────────── */
#footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
  font-size: .78rem; color: var(--text3);
}
#footer a { color: var(--text2); }
#footer a:hover { color: var(--text); }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero      { padding: 3rem 0 2.5rem; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}