:root {
    --bg-color: #f7f5ed;
    --text-color: #2c3533;
    --primary-color: #2c4c47;
    --primary-dark: #1b322f;
    --secondary-color: #d1bfae;
    --accent-color: #e28e5a;
    --border-color: #d8d3c5;
    --card-bg: #fbf9f4;
    --soft-radius: 6px;
}

body.puzzle-theme {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
}

/* ============================================================
   HEADER
   ============================================================ */
.puzzle-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 14px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.puzzle-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
}

.header-left .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    letter-spacing: 0.5px;
    line-height: 1.1;
}

.header-left .logo svg.geom-logo {
    width: 32px;
    height: 32px;
    color: var(--text-color);
}

.header-left .logo:hover {
    color: var(--primary-dark);
}

.header-tagline {
    margin-left: 24px;
    padding-left: 24px;
    border-left: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-color);
    font-weight: 500;
    letter-spacing: 1.5px;
    line-height: 1.4;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-nav .nav-link-main {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-color);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.15s ease;
}

.header-nav .nav-link-main:hover {
    background: #f5f2ed;
    color: var(--primary-dark);
}

.header-nav .btn-register {
    background: var(--primary-color);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 22px;
    border-radius: 8px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease;
    margin-left: 8px;
}

.header-nav .btn-register:hover {
    background: var(--primary-dark);
}

/* Logged-in user header */
.header-nav .user-greeting {
    font-size: 0.9rem;
    color: var(--text-color);
    padding: 8px 12px;
}

.header-nav .btn-logout {
    font-size: 0.9rem;
    color: var(--text-color);
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px 18px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.header-nav .btn-logout:hover {
    background: #f5f2ed;
    border-color: #ccc7bf;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--text-color);
}

.text-primary-dark {
    color: var(--primary-dark) !important;
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
    border-radius: var(--soft-radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0,0,0,0.02);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.game-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.05);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 400;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

/* ============================================================
   UTILITIES
   ============================================================ */
.soft-hr {
    border-color: var(--border-color);
    opacity: 0.5;
}

.alert-soft-info {
    background-color: #f1f6f5;
    border: 1px solid #d8e5e2;
    color: var(--primary-dark);
    border-radius: var(--soft-radius);
}

/* ============================================================
   LEADERBOARD (game pages)
   ============================================================ */
.leaderboard-preview li {
    padding: 4px 0;
    border-bottom: 1px dashed var(--border-color);
}

.leaderboard-preview li:last-child {
    border-bottom: none;
}

.leaderboard-card .list-group-item {
    border-color: var(--border-color);
}

/* ============================================================
   FOOTER
   ============================================================ */
.puzzle-footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0 32px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-left svg.geom-logo {
    width: 28px;
    height: 28px;
    color: var(--text-color);
}

.footer-nav {
    display: flex;
    gap: 24px;
    align-items: center;
}

.footer-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.88rem;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.footer-nav a:hover {
    opacity: 1;
    color: var(--primary-dark);
}

.footer-social {
    display: flex;
    gap: 16px;
    align-items: center;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #f5f2ed;
    transition: background 0.2s ease;
}

.footer-social a:hover {
    background: #e8e3dc;
}

.footer-social img {
    width: 18px;
    height: 18px;
    opacity: 0.6;
}

.footer-copyright {
    text-align: center;
    font-size: 0.82rem;
    color: #9a958e;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* Legacy footer links (keep for non-home pages if needed) */
.footer-links a {
    color: var(--text-color);
    text-decoration: none;
    margin: 0 8px;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--primary-dark);
}

/* ============================================================
   GAME CONTAINER (game pages)
   ============================================================ */
.game-container {
    border: 1px solid var(--border-color);
    border-radius: var(--soft-radius);
    background-color: var(--card-bg) !important;
    overflow: hidden;
}

.game-stats {
    font-weight: 600;
    color: var(--primary-dark);
}

/* ============================================================
   MOBILE RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .puzzle-header {
        padding: 10px 0;
    }

    .game-container {
        min-height: 300px !important;
    }

    .header-nav .nav-link-main {
        padding: 6px 10px;
        font-size: 0.85rem;
    }

    .footer-inner {
        flex-direction: column;
        gap: 20px;
    }

    .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
}

/* ============================================================
   OFFICIAL GOOGLE SIGN-IN BUTTON (GSI)
   ============================================================ */
.gsi-material-button {
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  -webkit-appearance: none;
  background-color: WHITE;
  background-image: none;
  border: 1px solid #747775;
  -webkit-border-radius: 4px;
  border-radius: 4px;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  color: #1f1f1f;
  cursor: pointer;
  font-family: 'Roboto', arial, sans-serif;
  font-size: 14px;
  height: 40px;
  letter-spacing: 0.25px;
  outline: none;
  overflow: hidden;
  padding: 0 12px;
  position: relative;
  text-align: center;
  -webkit-transition: background-color .218s, border-color .218s, box-shadow .218s;
  transition: background-color .218s, border-color .218s, box-shadow .218s;
  vertical-align: middle;
  white-space: nowrap;
  width: auto;
  max-width: 400px;
  min-width: min-content;
}

.gsi-material-button .gsi-material-button-icon {
  height: 20px;
  margin-right: 12px;
  min-width: 20px;
  width: 20px;
}

.gsi-material-button .gsi-material-button-content-wrapper {
  -webkit-align-items: center;
  align-items: center;
  display: flex;
  -webkit-flex-direction: row;
  flex-direction: row;
  -webkit-flex-wrap: nowrap;
  flex-wrap: nowrap;
  height: 100%;
  justify-content: space-between;
  position: relative;
  width: 100%;
}

.gsi-material-button .gsi-material-button-contents {
  -webkit-flex-grow: 1;
  flex-grow: 1;
  font-family: 'Roboto', arial, sans-serif;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: middle;
}

.gsi-material-button .gsi-material-button-state {
  -webkit-transition: opacity .218s;
  transition: opacity .218s;
  bottom: 0;
  left: 0;
  opacity: 0;
  position: absolute;
  right: 0;
  top: 0;
}

.gsi-material-button:button {
  outline: 0;
}

.gsi-material-button:disabled {
  cursor: default;
  background-color: #ffffff61;
  border-color: #1f1f1f1f;
}

.gsi-material-button:disabled .gsi-material-button-contents {
  color: #1f1f1f1f;
}

.gsi-material-button:disabled .gsi-material-button-icon {
  opacity: 37%;
}

.gsi-material-button:not(:disabled):active .gsi-material-button-state, 
.gsi-material-button:not(:disabled):focus .gsi-material-button-state {
  background-color: #303030;
  opacity: 12%;
}

.gsi-material-button:not(:disabled):hover {
  -webkit-box-shadow: 0 1px 2px 0 rgba(60,64,67, .30), 0 1px 3px 1px rgba(60,64,67, .15);
  box-shadow: 0 1px 2px 0 rgba(60,64,67, .30), 0 1px 3px 1px rgba(60,64,67, .15);
}

.gsi-material-button:not(:disabled):hover .gsi-material-button-state {
  background-color: #303030;
  opacity: 8%;
}