/* 基础样式 */
html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: "Microsoft YaHei", sans-serif;
}

:root {
    /* Enhanced red palette */
    --primary-red: #d4000f;
    --light-red: #ff6666;
    --dark-red: #b30000;
    --accent-red: #ff3333;
    
    /* Refined gold palette */
    --gold: #ffcc00;
    --light-gold: #fff3cc;
    --dark-gold: #e6b800;
    
    /* Improved pink palette */
    --pink: #ffc0cb;
    --light-pink: #ffe6ea;
    --muted-pink: #ffd9e0;
    
    /* New complementary colors */
    --cream: #fffaf0;
    --dark-cream: #fff5e6;
    --shadow: rgba(0, 0, 0, 0.1);
}

body {
    background: linear-gradient(135deg, var(--muted-pink), var(--pink));
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle fill="%23ffcc00" opacity="0.1" cx="50" cy="50" r="2"/></svg>') repeat;
    background-size: 50px 50px;
    animation: twinkle 3s ease-in-out infinite;
    z-index: 0;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

/* 页面布局 */
.page {
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 0;
    box-sizing: border-box;
    position: relative;
    overflow: hidden;
}

/* 烟花画布 */
#fireworksCanvas,
#homeFireworksCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    opacity: 0.8;
}

/* 内容容器 */
.container {
    position: relative;
    z-index: 2;
    background: linear-gradient(145deg, rgba(255, 230, 234, 0.3), rgba(255, 217, 224, 0.3));
    border: 2px solid var(--primary-red);
    border-radius: 24px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(179, 0, 0, 0.2);
    backdrop-filter: blur(12px);
    color: var(--dark-red);
    width: 90%;
    max-width: 1200px;
    margin: 10px auto;
    max-height: calc(100vh - 140px);
    height: calc(100vh - 140px);
    overflow: auto;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.container:hover {
    border-color: var(--accent-red);
    box-shadow: 0 12px 40px rgba(179, 0, 0, 0.3), inset 0 2px 6px rgba(255, 255, 255, 0.1);
    transform: translateY(-2px) scale(1.01);
    background: linear-gradient(145deg, rgba(255, 217, 224, 0.4), rgba(255, 230, 234, 0.4));
    backdrop-filter: blur(16px);
    animation: glow 1.5s ease-in-out infinite alternate;
}

#homepage .container {
    max-width: 300px;
}

#greetingPage .container {
    max-width: 800px;
}

/* 输入框样式 */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
    width: 100%;
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

#nameInput {
    width: 100%;
    padding: 14px 20px;
    font-size: 16px;
    border: 2px solid var(--primary-red);
    border-radius: 16px;
    background: linear-gradient(145deg, rgba(255, 230, 234, 0.4), rgba(255, 217, 224, 0.4));
    color: var(--dark-red);
    outline: none;
    transition: all 0.3s ease;
    box-sizing: border-box;
    box-shadow: inset 0 2px 4px rgba(179, 0, 0, 0.15);
    backdrop-filter: blur(8px);
}

#nameInput:focus {
    border-color: var(--accent-red);
    background: linear-gradient(145deg, rgba(255, 217, 224, 0.5), rgba(255, 230, 234, 0.5));
    box-shadow: 0 0 0 3px rgba(255, 51, 51, 0.2), inset 0 2px 6px rgba(179, 0, 0, 0.2);
    backdrop-filter: blur(12px);
    transform: scale(1.02);
    outline: 2px solid var(--gold);
    outline-offset: 2px;
    animation: glow 1.5s ease-in-out infinite alternate;
}

#nameInput::placeholder {
    color: rgba(179, 0, 0, 0.5);
    font-style: italic;
    font-weight: 500;
}

/* 按钮样式 */
.action-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: auto;
    padding-top: 20px;
}

.action-btn {
    min-width: 120px;
    font-weight: bold;
}

/* 主按钮样式 */
#submitBtn {
    background: linear-gradient(145deg, var(--primary-red), var(--accent-red));
    border: 2px solid var(--dark-red);
    padding: 16px 32px;
    color: var(--cream);
    border-radius: 32px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 6px 20px rgba(179, 0, 0, 0.2);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

#submitBtn.generating {
    background: linear-gradient(145deg, var(--gold), var(--dark-gold));
    border-color: var(--gold);
    color: var(--dark-red);
    text-shadow: 0 1px 1px rgba(255, 255, 255, 0.5);
    animation: buttonGlow 1.5s ease-in-out infinite alternate;
}

@keyframes buttonGlow {
    from {
        box-shadow: 0 0 10px var(--gold),
                    0 0 20px var(--light-gold);
    }
    to {
        box-shadow: 0 0 15px var(--gold),
                    0 0 30px var(--light-gold);
    }
}

#submitBtn:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 24px rgba(179, 0, 0, 0.3), inset 0 2px 6px rgba(255, 255, 255, 0.1);
    background: linear-gradient(145deg, var(--accent-red), var(--primary-red));
    border-color: var(--gold);
    color: var(--light-gold);
    animation: glow 1.5s ease-in-out infinite alternate;
}

#submitBtn:active {
    transform: translateY(1px);
    box-shadow: 0 4px 15px rgba(179, 0, 0, 0.2);
    background: linear-gradient(145deg, var(--primary-red), var(--accent-red));
}

/* 功能按钮样式 */
#backBtn, #shareBtn {
    background: linear-gradient(145deg, var(--light-pink), var(--muted-pink));
    border: 2px solid var(--primary-red);
    padding: 14px 28px;
    color: var(--dark-red);
    border-radius: 28px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(179, 0, 0, 0.15);
    text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

#backBtn:hover, #shareBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(179, 0, 0, 0.25), inset 0 2px 6px rgba(255, 255, 255, 0.1);
    background: linear-gradient(145deg, var(--muted-pink), var(--light-pink));
    border-color: var(--accent-red);
    color: var(--primary-red);
    animation: glow 1.5s ease-in-out infinite alternate;
}

#backBtn:active, #shareBtn:active {
    transform: translateY(1px);
    box-shadow: 0 4px 15px rgba(179, 0, 0, 0.2);
    background: linear-gradient(145deg, var(--light-pink), var(--muted-pink));
}

/* 禁用状态 */
button:disabled {
    background: #cccccc !important;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* 加载动画 */
button:disabled::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 200%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        rgba(255, 204, 0, 0.1),
        rgba(255, 255, 255, 0.2),
        transparent
    );
    animation: loading 1.5s infinite;
    filter: brightness(1.2);
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* 点击波纹效果 */
button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255,255,255,0.3), rgba(255,204,0,0.2), transparent);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: brightness(1.2);
}

button:active::before {
    width: 300px;
    height: 300px;
    opacity: 0;
    background: radial-gradient(circle, rgba(255,255,255,0.4), rgba(255,204,0,0.3), transparent);
}

/* 祝福内容样式 */
.greetings-container {
    margin: 10px auto;
    height: calc(100vh - 250px);
    overflow-y: auto;
    padding: 0 5px;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-red) transparent;
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    align-items: start;
    box-sizing: border-box;
}

.greetings-container::-webkit-scrollbar {
    width: 6px;
}

.greetings-container::-webkit-scrollbar-track {
    background: transparent;
}

.greetings-container::-webkit-scrollbar-thumb {
    background-color: var(--primary-red);
    border-radius: 3px;
    border: 1px solid var(--gold);
    transition: all 0.3s ease;
}

.greetings-container::-webkit-scrollbar-thumb:hover {
    background-color: var(--accent-red);
    box-shadow: 0 0 4px rgba(255, 204, 0, 0.3);
    transform: scale(1.1);
}

.greeting-card {
    background: linear-gradient(145deg, rgba(255, 244, 204, 0.6), rgba(255, 236, 179, 0.6));
    border: 2px solid var(--primary-red);
    border-radius: 16px;
    padding: 20px;
    margin: 10px auto;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--dark-red);
    font-size: 16px;
    text-align: center;
    line-height: 1.6;
    box-shadow: 0 4px 16px rgba(179, 0, 0, 0.15);
    backdrop-filter: blur(8px);
    width: 90%;
    box-sizing: border-box;
    animation: cardAppear 0.8s ease-out;
    transform-origin: center;
}

.greeting-card:hover {
    background: linear-gradient(145deg, rgba(255, 244, 204, 0.8), rgba(255, 236, 179, 0.8));
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 24px rgba(179, 0, 0, 0.3),
                0 0 30px rgba(255, 204, 0, 0.2);
    border-color: var(--gold);
    backdrop-filter: blur(12px);
}

@keyframes cardAppear {
    0% {
        opacity: 0;
        transform: translateY(50px) scale(0.8) rotate(-5deg);
    }
    50% {
        transform: translateY(-10px) scale(1.05) rotate(2deg);
    }
    75% {
        transform: translateY(5px) scale(0.98) rotate(-1deg);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1) rotate(0);
    }
}

/* 动作按钮样式 */
.action-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

.action-btn {
    min-width: 120px;
    font-weight: bold;
}

/* 复制提示 */
#copyTooltip {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 9999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    text-align: center;
    white-space: nowrap;
    pointer-events: none;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

#copyTooltip.show {
    opacity: 1;
    visibility: visible;
    animation: tooltipPop 0.3s ease;
}

@keyframes tooltipPop {
    0% {
        transform: translate(-50%, -50%) scale(0.8);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 15px;
        height: calc(100vh - 100px);
        margin: 15px auto;
    }

    .greetings-container {
        height: calc(100vh - 180px);
        padding: 0 5px;
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .greeting-card {
        width: 95%;
        font-size: 14px;
        padding: 15px;
        margin: 8px auto;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        width: 92%;
        padding: 25px;
    }

    .greetings-container {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 18px;
    }
}

/* 主页标题和容器 */
#homepage .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
}

#homepage h1 {
    font-size: 32px;
    color: var(--primary-red);
    margin-bottom: 30px;
    text-shadow: 0 2px 4px rgba(230, 0, 18, 0.1);
}

/* 提交按钮 */
#submitBtn {
    width: 100%;
    padding: 12px 30px;
    font-size: 16px;
    color: white;
    background: linear-gradient(135deg, var(--primary-red), var(--light-red));
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(230, 0, 18, 0.2);
}

#submitBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(230, 0, 18, 0.25);
    background: linear-gradient(135deg, var(--light-red), var(--primary-red));
}

#submitBtn:active {
    transform: translateY(0);
    box-shadow: 0 4px 15px rgba(230, 0, 18, 0.2);
}

/* 响应式适配 */
@media (max-width: 768px) {
    #homepage h1 {
        font-size: 28px;
    }

    .input-group {
        max-width: 280px;
    }

    #nameInput, #submitBtn {
        padding: 10px 20px;
        font-size: 15px;
    }
}

@media (min-width: 1200px) {
    #homepage h1 {
        font-size: 36px;
    }

    .input-group {
        max-width: 320px;
    }

    #nameInput, #submitBtn {
        padding: 14px 30px;
        font-size: 17px;
    }
}


/* 动画定义 */
@keyframes swing {
    0%, 100% { transform: rotate(-5deg); }
    50% { transform: rotate(5deg); }
}

@keyframes floatClouds {
    from { background-position: 0 0; }
    to { background-position: 100% 0; }
}

@keyframes slither {
    0%, 100% { transform: translateX(0) rotate(0deg); }
    50% { transform: translateX(30px) rotate(2deg); }
}

/* 页脚链接样式 */
.author-link {
    position: fixed;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(145deg, rgba(255, 244, 204, 0.8), rgba(255, 236, 179, 0.8));
    color: var(--dark-red);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 2px 10px rgba(179, 0, 0, 0.15);
    transition: all 0.3s ease;
    backdrop-filter: blur(8px);
    border: 1px solid var(--gold);
    z-index: 1;
}

.author-link:hover {
    transform: translateX(-50%) translateY(-2px);
    box-shadow: 0 4px 15px rgba(179, 0, 0, 0.2),
                0 0 20px rgba(255, 204, 0, 0.2);
    background: linear-gradient(145deg, rgba(255, 244, 204, 0.9), rgba(255, 236, 179, 0.9));
}