@import url('https://fonts.googleapis.com/css2?family=Mochiy+Pop+One&family=Quicksand:wght@300;400;500;600;700&display=swap');

:root {
    --kirby-pink: #FFC4D5; /* Softer pink */
    --kirby-pink-dark: #F9A8D4; /* Slightly darker pink for accents/hovers */
    --kirby-blue: #A0D2EB; /* Sky blue */
    --kirby-yellow: #FFFACD; /* Lemon chiffon / soft yellow */
    --kirby-green: #C1E1C1; /* Pastel green */
    --kirby-purple: #D8BFD8; /* Thistle / soft purple */
    --text-dark: #5D54A4; /* A soft dark purple/blue for text */
    --text-light: #ffffff;
    --bg-soft: #FEF6FB; /* Very light pink/cream background */
    --card-bg: #ffffff;
}

body {
    font-family: 'Quicksand', 'Mochiy Pop One', sans-serif;
    background-color: var(--bg-soft);
    color: var(--text-dark);
    overflow-x: hidden; /* Prevent horizontal scroll from clouds */
    scroll-behavior: smooth;
}

/* Kirby-themed title */
.kirby-title {
    font-family: 'Mochiy Pop One', sans-serif;
    color: var(--kirby-pink-dark);
    text-shadow: 1px 1px 0 var(--text-light), 2px 2px 0 var(--kirby-blue);
}

/* Custom button style */
.kirby-button {
    background-color: var(--kirby-pink);
    color: var(--text-dark);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px; /* pill shape */
    box-shadow: 0 4px 6px -1px rgba(249, 168, 212, 0.5), 0 2px 4px -2px rgba(249, 168, 212, 0.3);
    transition: all 0.3s ease-in-out;
    border: 2px solid var(--kirby-pink-dark);
    position: relative;
    overflow: hidden; /* For potential shine effect */
}
.kirby-button:hover {
    background-color: var(--kirby-pink-dark);
    color: var(--text-light);
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 10px 15px -3px rgba(249, 168, 212, 0.6), 0 4px 6px -4px rgba(249, 168, 212, 0.4);
}
.kirby-button:active {
    transform: translateY(0px) scale(0.98);
}

/* Card style */
.kirby-card {
    background-color: var(--card-bg);
    border-radius: 20px; /* More rounded */
    box-shadow: 0 10px 25px -5px rgba(160, 210, 235, 0.2), 0 8px 10px -6px rgba(160, 210, 235, 0.2);
    transition: all 0.3s ease-in-out;
    border: 1px solid var(--kirby-blue);
    position: relative; /* For pseudo-elements */
}
.kirby-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 30px -10px rgba(160, 210, 235, 0.3), 0 15px 20px -10px rgba(160, 210, 235, 0.3);
}
/* Adding some "star" dust or sparkle to cards */
.kirby-card::before {
    content: '✨';
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 1.5rem;
    opacity: 0.5;
    transform: rotate(15deg);
}


/* Step number styling */
.step-number {
    background-color: var(--kirby-yellow);
    color: var(--text-dark);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.25rem;
    margin-right: 0.75rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border: 2px solid var(--kirby-pink);
}

/* Image styling */
.tutorial-image {
    border: 4px solid var(--kirby-blue);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(160, 210, 235, 0.5);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    max-width: 100%;
    height: auto; /* Maintain aspect ratio */
    display: block; /* Removes extra space below image */
    margin-left: auto;
    margin-right: auto;
}
.tutorial-image:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 20px rgba(160, 210, 235, 0.7);
}

/* Image Modal */
.image-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(93, 84, 164, 0.85); /* var(--text-dark) with alpha */
    backdrop-filter: blur(5px); /* Frosted glass */
}
.image-modal-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 90%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}
.image-modal-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: var(--kirby-pink);
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}
.image-modal-close:hover,
.image-modal-close:focus {
    color: var(--kirby-yellow);
    text-decoration: none;
}

/* Animated background clouds */
.cloud-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1; /* Behind content */
    overflow: hidden;
    pointer-events: none; /* Allow clicks through */
}
.cloud {
    position: absolute;
    background: var(--kirby-blue);
    background: linear-gradient(to bottom, var(--kirby-blue) 5%, var(--kirby-yellow) 100%);
    border-radius: 50%;
    opacity: 0.3;
    filter: blur(2px); /* Soften clouds */
    animation: moveClouds 20s linear infinite;
}
.cloud.x1 { left: 200px; top: 50px; width: 60px; height: 60px; animation-duration: 18s; }
.cloud.x2 { left: 450px; top: 120px; width: 80px; height: 80px; transform: scale(0.8); animation-duration: 25s; }
.cloud.x3 { left: -150px; top: 250px; width: 50px; height: 50px; transform: scale(0.9); animation-duration: 22s; }
.cloud.x4 { left: 600px; top: 80px; width: 100px; height: 100px; transform: scale(0.7); animation-duration: 30s; }
.cloud.x5 { left: 100px; top: 350px; width: 70px; height: 70px; transform: scale(0.85); animation-duration: 20s; }
.cloud::before, .cloud::after {
    content: '';
    position: absolute;
    background: inherit; /* Use parent's gradient */
    border-radius: 50%;
    opacity: inherit;
    filter: inherit;
}
.cloud::before { width: 60%; height: 60%; top: -30%; right: 20%; }
.cloud::after { width: 80%; height: 80%; top: -40%; left: 25%; }

@keyframes moveClouds {
    0% { transform: translateX(0) translateY(0) scale(var(--scale, 1)); }
    50% { transform: translateX(-20px) translateY(10px) scale(var(--scale, 1)); }
    100% { transform: translateX(0) translateY(0) scale(var(--scale, 1)); animation-delay: inherit; }
}
/* Cloud movement - different directions/speeds using animation-delay trick */
.cloud-container .cloud:nth-child(odd) { animation: drift 60s linear infinite alternate; }
.cloud-container .cloud:nth-child(even) { animation: drift 80s linear infinite alternate-reverse; }

@keyframes drift {
    from { transform: translateX(-100vw) translateY(var(--y-offset, 0px)); }
    to { transform: translateX(100vw) translateY(calc(var(--y-offset, 0px) + 20px)); }
}
.cloud.x1 { --y-offset: 0px; animation-duration: 65s; }
.cloud.x2 { --y-offset: 50px; animation-duration: 75s; }
.cloud.x3 { --y-offset: -30px; animation-duration: 55s; }
.cloud.x4 { --y-offset: 20px; animation-duration: 85s; }
.cloud.x5 { --y-offset: -60px; animation-duration: 70s; }


/* SVG Filter for soft glow on title - might be too performance intensive for some, use with care */
.soft-glow {
    filter: url(#kirby-glow);
}

/* Fade in animation for content blocks */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease-out forwards;
}
@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* Staggered animation */
.kirby-card, .intro-text, .congrats-text {
    animation-delay: calc(var(--animation-order, 0) * 100ms);
}

/* Star particles */
.stars-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2; /* Behind clouds and content */
    pointer-events: none;
}
.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background-color: var(--kirby-yellow);
    border-radius: 50%;
    box-shadow: 0 0 6px 2px var(--kirby-yellow);
    animation: twinkle 3s infinite alternate;
}
@keyframes twinkle {
    0% { opacity: 0.5; transform: scale(0.8); }
    100% { opacity: 1; transform: scale(1.2); }
}

/* Section title styling */
.section-title {
    font-family: 'Mochiy Pop One', sans-serif;
    font-size: 1.75rem; /* 28px */
    line-height: 2.25rem; /* 36px */
    color: var(--kirby-pink-dark);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}
.section-title i {
    margin-right: 0.5rem;
    color: var(--kirby-yellow);
    text-shadow: 1px 1px 2px var(--kirby-pink);
}

/* 语言切换按钮样式 */
.lang-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    display: flex;
    align-items: center;
    background-color: var(--card-bg);
    border-radius: 20px;
    padding: 0.5rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border: 2px solid var(--kirby-pink-dark);
    transition: all 0.3s ease;
}

/* 在移动设备上调整位置 */
@media (max-width: 768px) {
    .lang-switcher {
        top: auto;
        bottom: 20px;
        right: 20px;
        opacity: 0.8;
    }
    .lang-switcher:hover {
        opacity: 1;
    }
}

.lang-btn {
    padding: 0.5rem 1rem;
    border-radius: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.lang-btn.active {
    background-color: var(--kirby-pink);
    color: var(--text-dark);
    transform: scale(1.05);
}

.lang-btn:not(.active) {
    background-color: transparent;
    color: var(--text-dark);
    opacity: 0.7;
}

.lang-btn:not(.active):hover {
    opacity: 1;
    transform: scale(1.05);
}

/* 添加波纹效果 */
.lang-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.7);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.lang-btn:active::after {
    animation: ripple 0.6s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}