* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --sakura-light: #FFE4E9;
    --sakura-pink: #FFB7C5;
    --sakura-dark: #FF85A2;
    --sakura-deep: #F48FB1;
    --white: #FFFFFF;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    background: linear-gradient(-45deg, var(--sakura-light), var(--sakura-pink), var(--sakura-dark), var(--sakura-deep));
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

#sakura-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.app-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.app-header {
    text-align: center;
    padding: 40px 20px;
    margin-bottom: 30px;
}

.title {
    font-size: 2.5rem;
    color: var(--sakura-deep);
    text-shadow: 2px 2px 4px rgba(255, 255, 255, 0.8);
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    color: #886677;
}

.tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.tab, a.tab {
    padding: 12px 30px;
    font-size: 1rem;
    border: none;
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.6);
    color: var(--sakura-deep);
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(255, 133, 162, 0.2);
    text-decoration: none;
    display: inline-block;
}

.tab:hover, a.tab:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
}

.tab.active {
    background: linear-gradient(135deg, var(--sakura-pink), var(--sakura-deep));
    color: white;
    box-shadow: 0 6px 20px rgba(255, 133, 162, 0.4);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.tools-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 20px;
    padding: 20px;
    margin: 0 auto;
    max-width: 800px;
}

.tool-card {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 30px 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px rgba(255, 133, 162, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    width: 250px;
    flex-shrink: 0;
    box-sizing: border-box;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(255, 133, 162, 0.3);
    background: rgba(255, 255, 255, 0.9);
}

.tool-name {
    font-size: 1.3rem;
    color: var(--sakura-deep);
    margin-bottom: 10px;
}

.tool-desc {
    color: #998888;
    font-size: 0.95rem;
}

.tool-card-link {
    text-decoration: none;
    display: block;
}