/* ================================
   Math Stuff Pro - Full Stylesheet
   ================================ */
@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap");

/* -------- Base -------- */
:root {
  --bg: #f4f4f6;
  --text: #1a1a1a;
  --card: #ffffff;
  --border: #dcdcdc;
  --accent: #3c78d8;
  --muted: #666;
  --menu-btn-bg: #eaeaea;
  --menu-btn-color: #000;
}

body.dark {
  --bg: #1e1f22;
  --text: #f2f2f2;
  --card: #2a2b2f;
  --border: #3d3e42;
  --accent: #5b8cff;
  --muted: #aaa;
  --menu-btn-bg: #333;
  --menu-btn-color: #fff;
}

/* -------- Reset & Layout -------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Roboto", sans-serif;
}

html,
body {
  direction: ltr;
}

body {
  background-color: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: row;
  min-height: 100vh;
}

body.motion-ui {
  position: relative;
  overflow-x: hidden;
  --motion-primary: #1f86ff;
  --motion-secondary: #00a98f;
  --motion-warm: #ff9952;
  background-image:
    radial-gradient(circle at 8% 8%, rgba(31, 134, 255, 0.22), transparent 36%),
    radial-gradient(circle at 88% 12%, rgba(0, 169, 143, 0.16), transparent 42%),
    radial-gradient(circle at 50% 100%, rgba(255, 153, 82, 0.1), transparent 45%),
    linear-gradient(180deg, #edf4ff 0%, #f6f8ff 54%, #f3f6fb 100%);
  background-attachment: fixed;
}

body.dark.motion-ui {
  background-image:
    radial-gradient(circle at 8% 8%, rgba(31, 134, 255, 0.3), transparent 36%),
    radial-gradient(circle at 88% 12%, rgba(0, 169, 143, 0.2), transparent 42%),
    radial-gradient(circle at 50% 100%, rgba(255, 153, 82, 0.14), transparent 45%),
    linear-gradient(180deg, #161b24 0%, #151922 54%, #11151d 100%);
}

body.motion-ui::before,
body.motion-ui::after {
  content: "";
  position: fixed;
  pointer-events: none;
  z-index: 0;
  width: 42vmax;
  height: 42vmax;
  filter: blur(36px);
  opacity: 0.42;
}

body.motion-ui::before {
  top: -18vmax;
  right: -12vmax;
  background: radial-gradient(circle, rgba(31, 134, 255, 0.45) 0%, rgba(31, 134, 255, 0) 65%);
  transform: translate3d(-1.5vmax, 1vmax, 0) scale(1.04);
}

body.motion-ui::after {
  bottom: -19vmax;
  left: -14vmax;
  background: radial-gradient(circle, rgba(0, 169, 143, 0.38) 0%, rgba(0, 169, 143, 0) 70%);
  transform: translate3d(1.5vmax, -1vmax, 0) scale(1.03);
}

body.motion-ui > * {
  z-index: 1;
}

body.motion-ui #sidebar,
body.motion-ui .main {
  position: relative;
  z-index: 1;
}

body.motion-ui * {
  font-family: "Space Grotesk", "Roboto", sans-serif;
}

/* -------- Sidebar -------- */
#sidebar {
  background: var(--card);
  border-right: 1px solid var(--border);
  order: 0;
  flex: 0 0 240px;
  width: 240px;
  height: calc(100vh - 60px);
  margin-top: 60px;
  transition: width 0.2s ease;
  display: flex;
  flex-direction: column;
  padding-top: 10px;
  position: relative;
  z-index: 5;
}

body.motion-ui #sidebar {
  box-shadow: 8px 0 20px rgba(0, 0, 0, 0.06);
}

#sidebar.collapsed {
  flex-basis: 70px;
  width: 70px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  text-decoration: none;
  color: var(--text);
  transition: background 0.2s;
}

.nav-link img {
  width: 24px;
  height: 24px;
}

.nav-link span {
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
  transition: opacity 0.2s;
}

#sidebar.collapsed .nav-link span {
  opacity: 0;
  width: 0;
  margin: 0;
  pointer-events: none;
}

#sidebar.collapsed .nav-link {
  justify-content: center;
  gap: 0;
  padding: 12px 0;
}

.nav-link:hover {
  background: var(--border);
}

.nav-link.active {
  background: var(--accent);
  color: #fff;
  border-radius: 0 25px 25px 0;
}

/* -------- Topbar -------- */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 10px;
  z-index: 20;
}

body.motion-ui .topbar {
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

#menu-btn {
  background: var(--menu-btn-bg);
  color: var(--menu-btn-color);
  border: none;
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 18px;
  transition: background 0.2s;
}

#menu-btn:hover {
  background: var(--accent);
  color: #fff;
}

.logo {
  height: 32px;
  cursor: pointer;
}

.title {
  font-size: 20px;
  cursor: pointer;
  user-select: none;
}

/* -------- Main -------- */
.main {
  order: 1;
  flex: 1;
  min-width: 0;
  padding: 80px 24px 24px 24px;
  overflow-y: auto;
}

/* -------- Cards -------- */
.welcome,
.suggest,
.settings-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

body.motion-ui .welcome,
body.motion-ui .suggest,
body.motion-ui .settings-card,
body.motion-ui .game-header {
  border-color: rgba(60, 120, 216, 0.35);
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.08);
}

h2, h3 {
  margin-bottom: 12px;
}

/* -------- Buttons -------- */
.button {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 10px 16px;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.2s;
}
.button:hover {
  background: #2c66cc;
}

/* -------- Search & Games -------- */
#search {
  width: 100%;
  max-width: 400px;
  padding: 10px;
  margin-bottom: 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}

#search::placeholder {
  color: var(--muted);
}

#search:focus {
  outline: 1px solid var(--accent);
}

#game-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.game-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  cursor: pointer;
  text-align: center;
  transition: transform 0.15s, box-shadow 0.15s;
}

body.motion-ui .game-card {
  border-color: rgba(60, 120, 216, 0.4);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}

.game-card img {
  width: 100%;
  border-radius: 10px;
  margin-bottom: 8px;
}

.game-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.muted {
  color: var(--muted);
  text-align: center;
}

/* -------- Switch -------- */
.settings-option {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 14px;
  font-size: 16px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 26px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--border);
  border-radius: 34px;
  transition: .3s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  border-radius: 50%;
  transition: .3s;
}

input:checked + .slider {
  background-color: var(--accent);
}

input:checked + .slider:before {
  transform: translateX(20px);
}

/* -------- Game Player -------- */
.game-container {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

#game-frame {
  width: 100%;
  height: calc(100vh - 200px);
  border: 1px solid var(--border);
  border-radius: 12px;
  background:
    radial-gradient(circle at 8% 10%, rgba(60, 120, 216, 0.22), transparent 42%),
    radial-gradient(circle at 92% 12%, rgba(0, 169, 143, 0.16), transparent 46%),
    linear-gradient(160deg, color-mix(in srgb, var(--card) 88%, #0b1320 12%), var(--card));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 16px;
}

.game-header h2 {
  margin: 0;
  font-weight: 500;
  font-size: 20px;
}

.game-controls {
  display: flex;
  gap: 10px;
}

.game-btn {
  border: none;
  border-radius: 8px;
  padding: 6px 12px;
  background: var(--menu-btn-bg);
  color: var(--menu-btn-color);
  cursor: pointer;
  transition: background .2s, color .2s;
}

.game-btn:hover {
  background: var(--accent);
  color: #fff;
}

/* -------- Motion UI Enhancements -------- */
body.motion-ui .topbar {
  background: rgba(255, 255, 255, 0.72);
  border-bottom-color: rgba(31, 134, 255, 0.24);
  box-shadow: 0 10px 30px rgba(8, 20, 45, 0.14);
}

body.dark.motion-ui .topbar {
  background: rgba(20, 24, 33, 0.72);
}

body.motion-ui #sidebar {
  background: rgba(255, 255, 255, 0.66);
  border-right-color: rgba(31, 134, 255, 0.22);
  backdrop-filter: blur(10px);
}

body.dark.motion-ui #sidebar {
  background: rgba(21, 26, 35, 0.72);
}

body.motion-ui .nav-link {
  margin: 6px 10px;
  border-radius: 12px;
  transition: transform 0.22s ease, background 0.22s ease, box-shadow 0.22s ease;
}

body.motion-ui .nav-link:hover {
  background: rgba(31, 134, 255, 0.12);
  transform: translateX(4px);
  box-shadow: 0 7px 14px rgba(31, 134, 255, 0.12);
}

body.motion-ui .nav-link.active {
  background: linear-gradient(135deg, #1f86ff 0%, #00a98f 100%);
  border-radius: 12px;
  box-shadow: 0 10px 20px rgba(19, 118, 203, 0.24);
}

body.motion-ui #sidebar.collapsed .nav-link {
  margin: 6px 8px;
  justify-content: center;
}

body.motion-ui .title {
  font-weight: 700;
  letter-spacing: 0.01em;
}

body.motion-ui .welcome,
body.motion-ui .suggest,
body.motion-ui .settings-card,
body.motion-ui .game-header {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.55));
  border: 1px solid rgba(31, 134, 255, 0.28);
  border-radius: 16px;
  box-shadow: 0 18px 34px rgba(16, 24, 40, 0.12);
  backdrop-filter: blur(10px);
}

body.dark.motion-ui .welcome,
body.dark.motion-ui .suggest,
body.dark.motion-ui .settings-card,
body.dark.motion-ui .game-header {
  background: linear-gradient(160deg, rgba(31, 38, 50, 0.8), rgba(23, 28, 39, 0.64));
  border-color: rgba(70, 163, 255, 0.34);
}

body.motion-ui #search {
  border-radius: 14px;
  border-color: rgba(31, 134, 255, 0.28);
  box-shadow: 0 10px 20px rgba(16, 24, 40, 0.08), inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

body.motion-ui #search:focus {
  outline: none;
  border-color: rgba(31, 134, 255, 0.62);
  box-shadow: 0 0 0 3px rgba(31, 134, 255, 0.2), 0 12px 24px rgba(16, 24, 40, 0.13);
}

body.motion-ui .game-card {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  border-color: rgba(31, 134, 255, 0.28);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.58));
  box-shadow: 0 14px 26px rgba(16, 24, 40, 0.1);
  transition: transform 0.26s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.26s ease;
}

body.dark.motion-ui .game-card {
  background: linear-gradient(160deg, rgba(31, 38, 50, 0.84), rgba(22, 27, 37, 0.66));
  border-color: rgba(70, 163, 255, 0.3);
}

body.motion-ui .game-card::after {
  content: "";
  position: absolute;
  inset: -34% -52%;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0) 36%, rgba(255, 255, 255, 0.35) 50%, rgba(255, 255, 255, 0) 64%);
  transform: translateX(-100%) rotate(8deg);
  transition: transform 0.7s ease;
}

body.motion-ui .game-card:hover {
  transform: translateY(-8px) scale(1.015);
  box-shadow: 0 22px 40px rgba(16, 24, 40, 0.18);
}

body.motion-ui .game-card:hover::after {
  transform: translateX(100%) rotate(8deg);
}

body.motion-ui #menu-btn,
body.motion-ui .game-btn,
body.motion-ui .button {
  border-radius: 12px;
  font-weight: 600;
  border: 1px solid rgba(31, 134, 255, 0.24);
  box-shadow: 0 8px 16px rgba(16, 24, 40, 0.1);
}

body.motion-ui .button {
  background: linear-gradient(135deg, #1f86ff 0%, #00a98f 100%);
}

body.motion-ui .button:hover {
  background: linear-gradient(135deg, #1673e1 0%, #008f79 100%);
}

body.motion-ui #menu-btn:hover,
body.motion-ui .game-btn:hover {
  background: linear-gradient(135deg, #1f86ff 0%, #00a98f 100%);
  color: #fff;
}

body.motion-ui .settings-option {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(31, 134, 255, 0.22);
  background: rgba(255, 255, 255, 0.45);
}

body.dark.motion-ui .settings-option {
  background: rgba(22, 27, 37, 0.5);
}

body.motion-ui .slider {
  background: rgba(31, 134, 255, 0.18);
}

body.motion-ui input:checked + .slider {
  background: linear-gradient(135deg, #1f86ff 0%, #00a98f 100%);
}

body.motion-ui #game-frame {
  border-color: rgba(31, 134, 255, 0.3);
  box-shadow: 0 18px 30px rgba(16, 24, 40, 0.14);
}

/* -------- Motion Performance -------- */
body.motion-ui .topbar,
body.motion-ui #sidebar,
body.motion-ui .nav-link,
body.motion-ui .main > *,
body.motion-ui #menu-btn,
body.motion-ui .button,
body.motion-ui .game-btn {
  will-change: transform, opacity;
  backface-visibility: hidden;
}

body.motion-ui .game-card {
  contain: paint;
}

/* -------- Requested Control Styling Overrides -------- */
body.motion-ui #menu-btn {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.06)), var(--menu-btn-bg);
  border-color: rgba(91, 140, 255, 0.45);
  border-width: 1px;
  border-style: solid;
  width: 38px;
  height: 36px;
  padding: 0;
  line-height: 1;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.18s, box-shadow 0.2s;
}

body.motion-ui #menu-btn:hover {
  background: linear-gradient(135deg, #1f86ff 0%, #00a98f 100%);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.14);
}

body.motion-ui #menu-btn:active {
  transform: translateY(0);
}

body.motion-ui #menu-btn:focus-visible {
  outline: 2px solid rgba(91, 140, 255, 0.85);
  outline-offset: 2px;
}

body.motion-ui #search {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04)), var(--card);
  border-color: rgba(91, 140, 255, 0.45);
  padding: 11px 14px;
  border-radius: 12px;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.07);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

body.motion-ui #search:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91, 140, 255, 0.24), 0 8px 18px rgba(0, 0, 0, 0.1);
  transform: translateY(-1px);
}

body.motion-ui .game-btn {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.05)), var(--menu-btn-bg);
  border-color: rgba(91, 140, 255, 0.4);
  border-width: 1px;
  border-style: solid;
  border-radius: 10px;
  padding: 7px 13px;
  min-width: 44px;
  font-weight: 600;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
  transition: background .2s, color .2s, border-color .2s, transform .18s, box-shadow .2s;
}

body.motion-ui .game-btn:hover {
  background: linear-gradient(135deg, #1f86ff 0%, #00a98f 100%);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.14);
}

body.motion-ui .game-btn:active {
  transform: translateY(0);
}

body.motion-ui .game-btn:focus-visible {
  outline: 2px solid rgba(91, 140, 255, 0.85);
  outline-offset: 2px;
}
/* -------- Scrollbar -------- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-thumb {
  background-color: var(--border);
  border-radius: 8px;
}
::-webkit-scrollbar-thumb:hover {
  background-color: var(--accent);
}

/* -------- Responsive -------- */
@media (max-width: 700px) {
  #sidebar {
    position: fixed;
    z-index: 9;
    left: -240px;
    top: 60px;
    margin-top: 0;
    height: calc(100vh - 60px);
  }

  #sidebar.collapsed {
    left: 0;
  }

  .main {
    padding: 80px 16px 16px 16px;
  }
}