/* 紅樓九夢 UI 設計系統 - 紋理與背景效果 */

/* ========== 背景紋理系統 ========== */
/* 宣紙紋理背景 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(31, 27, 36, 0.01) 2px,
            rgba(31, 27, 36, 0.01) 4px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(31, 27, 36, 0.01) 2px,
            rgba(31, 27, 36, 0.01) 4px
        );
    pointer-events: none;
    z-index: -1;
    opacity: 0.3;
}

/* 雲紋裝飾效果 */
.card::before,
.panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(201, 60, 74, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(91, 161, 153, 0.03) 0%, transparent 50%);
    pointer-events: none;
    border-radius: inherit;
    opacity: 0.5;
}

/* 暗黑模式紋理調整 */
@media (prefers-color-scheme: dark) {
    body::before {
        background-image: 
            repeating-linear-gradient(
                0deg,
                transparent,
                transparent 2px,
                rgba(248, 247, 242, 0.01) 2px,
                rgba(248, 247, 242, 0.01) 4px
            ),
            repeating-linear-gradient(
                90deg,
                transparent,
                transparent 2px,
                rgba(248, 247, 242, 0.01) 2px,
                rgba(248, 247, 242, 0.01) 4px
            );
    }
    
    .card::before,
    .panel::before {
        background-image: 
            radial-gradient(circle at 20% 30%, rgba(201, 60, 74, 0.05) 0%, transparent 50%),
            radial-gradient(circle at 80% 70%, rgba(91, 161, 153, 0.05) 0%, transparent 50%);
    }
}

/* ========== 互動動畫系統 ========== */
/* 按鈕點擊動畫 */
@keyframes buttonClick {
    0% { transform: scale(1); }
    50% { transform: scale(0.95); }
    100% { transform: scale(1); }
}

.btn:active,
.action-button:active,
.dialog-button:active {
    animation: buttonClick var(--transition-fast);
}

/* 卡片展開動畫 */
@keyframes cardExpand {
    0% {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.card,
.panel {
    animation: cardExpand var(--transition-base) ease-out;
}

/* 淡入動畫 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.dialog-overlay.active .dialog,
.tutorial-overlay.active .tutorial-tooltip {
    animation: fadeIn var(--transition-base) ease-out;
}

/* 脈衝動畫（用於推薦操作） */
@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(201, 60, 74, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(201, 60, 74, 0);
    }
}

.action-button.recommended,
.garden-cell.interactive {
    animation: pulse 2s infinite;
}

/* 閃爍動畫（用於記憶碎片） */
@keyframes glimmer {
    0%, 100% {
        opacity: 1;
        filter: brightness(1);
    }
    50% {
        opacity: 0.8;
        filter: brightness(1.2);
    }
}

.garden-cell.has-memory {
    animation: glimmer 3s infinite;
}

/* 懸浮動畫 */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

.jieqi-indicator:hover,
.menu-toggle:hover {
    animation: float 2s infinite;
}

/* ========== 過渡效果 ========== */
/* 平滑過渡 */
* {
    transition-property: background-color, border-color, color, transform, opacity, box-shadow;
    transition-duration: var(--transition-base);
    transition-timing-function: ease-out;
}

/* 快速過渡（用於互動元素） */
.btn,
.action-button,
.dialog-button,
.list-item,
.garden-cell {
    transition-duration: var(--transition-fast);
}

/* 慢速過渡（用於背景和大型元素） */
body,
.container,
.game-status {
    transition-duration: var(--transition-slow);
}

/* ========== 特殊效果 ========== */
/* 光暈效果（用於重要元素） */
.glow {
    box-shadow: 
        0 0 10px rgba(201, 60, 74, 0.3),
        0 0 20px rgba(201, 60, 74, 0.2),
        0 0 30px rgba(201, 60, 74, 0.1);
}

/* 金粉閃爍效果 */
.gold-sparkle {
    position: relative;
}

.gold-sparkle::after {
    content: '✨';
    position: absolute;
    top: -5px;
    right: -5px;
    font-size: var(--font-size-sm);
    animation: sparkle 2s infinite;
    opacity: 0.8;
}

@keyframes sparkle {
    0%, 100% {
        opacity: 0.8;
        transform: scale(1) rotate(0deg);
    }
    50% {
        opacity: 1;
        transform: scale(1.2) rotate(180deg);
    }
}

/* 水墨暈染效果（用於對話框） */
.memory-dialog,
.quiz-dialog {
    position: relative;
}

.memory-dialog::before,
.quiz-dialog::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(
        135deg,
        rgba(201, 60, 74, 0.1) 0%,
        rgba(91, 161, 153, 0.1) 50%,
        rgba(201, 60, 74, 0.1) 100%
    );
    border-radius: inherit;
    z-index: -1;
    filter: blur(4px);
    opacity: 0.5;
}