/* ============================================================
   SHARED GAME DESIGN TOKENS & UTILITIES
   Loaded by: bird-runner, migration, floating-island,
              wetland-detective, wetland-restorer
   ============================================================ */

/* -----------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   ----------------------------------------------------------- */
:root {
    /* Core palette */
    --g-primary:       #2D6A4F;
    --g-primary-lt:   #52B788;
    --g-primary-dk:   #1B4332;
    --g-accent:       #E9C46A;
    --g-accent-hot:   #E76F51;
    --g-bg:           #F2EDE4;
    --g-surface:      rgba(255, 255, 255, 0.88);
    --g-surface-dk:   rgba(20, 35, 25, 0.88);
    --g-text:         #2C2C2C;
    --g-text-muted:   #8A8A8A;
    --g-text-light:   rgba(255,255,255,0.85);
    --g-border:       rgba(45, 106, 79, 0.15);

    /* Radius */
    --g-r-sm:  8px;
    --g-r-md:  14px;
    --g-r-lg:  22px;
    --g-r-xl:  32px;
    --g-r-pill: 999px;

    /* Shadows */
    --g-sd-sm: 0 2px 10px rgba(0,0,0,0.09);
    --g-sd-md: 0 6px 24px rgba(0,0,0,0.13);
    --g-sd-lg: 0 16px 48px rgba(0,0,0,0.18);
    --g-sd-glow: 0 0 20px rgba(45,106,79,0.35);

    /* Glass */
    --g-glass-bg: rgba(255,255,255,0.72);
    --g-glass-bd: rgba(255,255,255,0.45);
    --g-glass-blur: blur(14px);

    /* Fonts */
    --g-font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

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

/* -----------------------------------------------------------
   Shared Layout
   ----------------------------------------------------------- */
.game-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: 16px 16px 40px;
}

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 4px;
    margin-bottom: 12px;
}

.game-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--g-primary-dk);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--g-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
}

.logo-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--g-primary-dk);
}

/* -----------------------------------------------------------
   New game shell compatibility
   The latest game pages use gh/gw/g-canvas-* class names.
   ----------------------------------------------------------- */
.gh {
    width: min(900px, calc(100vw - 28px));
    margin: 0 auto;
    padding: 14px 0 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.gh-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--g-primary-dark, var(--g-primary-dk));
    text-decoration: none;
    min-width: 0;
}

.gh-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    color: #fff;
    background: var(--g-btn-gradient, linear-gradient(135deg, var(--g-primary), var(--g-primary-lt)));
    box-shadow: var(--g-sd-sm);
}

.gh-title {
    font-size: 18px;
    font-weight: 800;
    white-space: nowrap;
}

.gh-nav {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.gh-nav a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 14px;
    border-radius: var(--g-r-pill);
    text-decoration: none;
    color: var(--g-primary-dark, var(--g-primary-dk));
    background: rgba(255,255,255,0.72);
    border: 1px solid rgba(255,255,255,0.55);
    box-shadow: var(--g-sd-sm);
}

.gw {
    width: min(900px, calc(100vw - 28px));
    margin: 0 auto;
    padding-bottom: 36px;
}

.g-canvas-wrap {
    position: relative;
    width: 100%;
    height: min(72vh, 620px);
    min-height: 520px;
    overflow: hidden;
    border-radius: var(--g-r-lg);
    background: #e8e4dd;
    box-shadow: var(--g-sd-lg);
    isolation: isolate;
}

.g-canvas {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
}

.g-overlay {
    position: absolute;
    inset: 0;
    z-index: 30;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    text-align: center;
}

.g-overlay h2 {
    margin: 0 0 8px;
    font-size: 30px;
    font-weight: 800;
    color: var(--g-primary-dark, var(--g-primary-dk));
}

.g-subtitle {
    margin: 0 0 18px;
    max-width: 520px;
    color: var(--g-text-muted);
    line-height: 1.65;
}

.g-info-panel {
    margin-top: 16px;
    padding: 16px 18px;
    border-radius: var(--g-r-md);
    background: rgba(255,255,255,0.78);
    border: 1px solid rgba(255,255,255,0.55);
    box-shadow: var(--g-sd-sm);
    color: var(--g-text);
    line-height: 1.7;
}

.g-hint-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin: 8px 0;
}

@media (max-width: 640px) {
    .gh, .gw { width: min(100vw - 16px, 900px); }
    .gh { padding-top: 8px; }
    .gh-title { font-size: 16px; }
    .gh-nav a { padding: 8px 10px; font-size: 13px; }
    .g-canvas-wrap { height: min(76vh, 560px); min-height: 460px; border-radius: 14px; }
    .g-overlay { padding: 18px; }
    .g-overlay h2 { font-size: 24px; }
}

/* -----------------------------------------------------------
   Canvas Container
   ----------------------------------------------------------- */
.canvas-container {
    position: relative;
    border-radius: var(--g-r-lg);
    overflow: hidden;
    box-shadow: var(--g-sd-md);
    background: #e8e4dd;
}

.canvas-container canvas {
    display: block;
    width: 100%;
    height: auto;
    cursor: default;
}

/* -----------------------------------------------------------
   Shared Overlay (base — game-specific panels extend this)
   ----------------------------------------------------------- */
.game-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    padding: 24px;
}

.game-overlay-content {
    background: var(--g-glass-bg);
    backdrop-filter: var(--g-glass-blur);
    -webkit-backdrop-filter: var(--g-glass-blur);
    border: 1px solid var(--g-glass-bd);
    border-radius: var(--g-r-xl);
    box-shadow: var(--g-sd-lg);
    padding: 36px 40px;
    width: 100%;
    max-width: 460px;
    text-align: center;
    animation: gFadeIn 0.3s ease-out;
}

@keyframes gFadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* -----------------------------------------------------------
   Shared Buttons
   ----------------------------------------------------------- */
.g-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--g-r-pill);
    font-family: var(--g-font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.22s ease;
    text-decoration: none;
    line-height: 1;
}

.g-btn:active { transform: scale(0.97); }

.g-btn:not(.g-btn-ghost):not(.g-btn-primary):not(.g-btn-accent) {
    background: var(--g-btn-gradient, linear-gradient(135deg, var(--g-primary), var(--g-primary-lt)));
    color: white;
    box-shadow: var(--g-sd-sm);
}

.g-btn:not(.g-btn-ghost):not(.g-btn-primary):not(.g-btn-accent):hover {
    transform: translateY(-1px);
    box-shadow: var(--g-sd-md);
}

.g-btn-primary {
    background: var(--g-primary);
    color: white;
    box-shadow: var(--g-sd-sm), 0 4px 12px rgba(45,106,79,0.28);
}
.g-btn-primary:hover {
    background: var(--g-primary-lt);
    box-shadow: var(--g-sd-md), 0 6px 16px rgba(45,106,79,0.36);
    transform: translateY(-1px);
}

.g-btn-accent {
    background: var(--g-accent);
    color: #5a3a00;
    box-shadow: var(--g-sd-sm);
}
.g-btn-accent:hover {
    background: #f0d080;
    transform: translateY(-1px);
}

.g-btn-secondary {
    background: rgba(255,255,255,0.5);
    color: var(--g-primary-dk);
    border: 1.5px solid var(--g-border);
}
.g-btn-secondary:hover {
    background: rgba(255,255,255,0.75);
    border-color: var(--g-primary-lt);
}

/* -----------------------------------------------------------
   Shared Stat Badge
   ----------------------------------------------------------- */
.g-stat {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(0,0,0,0.48);
    color: white;
    padding: 5px 14px;
    border-radius: var(--g-r-pill);
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.g-stat .g-stat-icon { font-size: 11px; opacity: 0.75; }
.g-stat .g-stat-val  { color: var(--g-accent); font-weight: 700; }

/* -----------------------------------------------------------
   Glass Panel (shared decorative container)
   ----------------------------------------------------------- */
.g-glass-panel {
    background: var(--g-glass-bg);
    backdrop-filter: var(--g-glass-blur);
    -webkit-backdrop-filter: var(--g-glass-blur);
    border: 1px solid var(--g-glass-bd);
    border-radius: var(--g-r-md);
    box-shadow: var(--g-sd-sm);
}

/* -----------------------------------------------------------
   Score / Result Panel (shared)
   ----------------------------------------------------------- */
.g-result-grade {
    font-size: 72px;
    font-weight: 700;
    line-height: 1;
    color: var(--g-accent);
    text-shadow: 0 2px 12px rgba(233,196,106,0.4);
}

.g-result-label {
    font-size: 14px;
    color: var(--g-text-muted);
    margin-top: 4px;
    margin-bottom: 20px;
}

.g-result-score {
    font-size: 44px;
    font-weight: 700;
    color: var(--g-primary-dk);
}

.g-result-score-lbl {
    font-size: 12px;
    color: var(--g-text-muted);
    margin-bottom: 24px;
}

.g-result-stats {
    display: flex;
    justify-content: center;
    gap: 28px;
    margin-bottom: 28px;
}

.g-result-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.g-result-stat .val {
    font-size: 28px;
    font-weight: 700;
}

.g-result-stat .lbl {
    font-size: 11px;
    color: var(--g-text-muted);
}

.g-result-stat.correct .val { color: #2D6A4F; }
.g-result-stat.wrong   .val { color: #E76F51; }
.g-result-stat.combo   .val { color: var(--g-accent); }

/* -----------------------------------------------------------
   Game Rule Card (shared glass panel)
   ----------------------------------------------------------- */
.g-rules {
    background: rgba(255,255,255,0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.4);
    border-radius: var(--g-r-md);
    padding: 14px 18px;
    font-size: 12.5px;
    color: var(--g-text-muted);
    line-height: 1.7;
    text-align: left;
    margin-top: 16px;
}

.g-rules strong { color: var(--g-primary-dk); }

/* -----------------------------------------------------------
   High Score Badge
   ----------------------------------------------------------- */
.g-highscore {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(233,196,106,0.18);
    border: 1px solid rgba(233,196,106,0.4);
    color: #7a5a00;
    padding: 4px 12px;
    border-radius: var(--g-r-pill);
    font-size: 12px;
    font-weight: 600;
}

.g-highscore .fa-star { color: var(--g-accent); }

/* -----------------------------------------------------------
   Animations
   ----------------------------------------------------------- */
@keyframes gBounce {
    0%,100% { transform: scale(1); }
    50%      { transform: scale(1.12); }
}

@keyframes gSlideUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes gPulse {
    0%,100% { opacity: 1; }
    50%      { opacity: 0.5; }
}

/* -----------------------------------------------------------
   Responsive
   ----------------------------------------------------------- */
@media (max-width: 640px) {
    .game-wrapper { padding: 10px 10px 32px; }
    .game-overlay-content { padding: 28px 20px; }
    .g-result-grade { font-size: 56px; }
    .g-result-score { font-size: 36px; }
}