:root {
    --bg-color: #050507;
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b0;
    --glass-bg: rgba(20, 20, 25, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --font-serif: 'Noto Serif TC', 'Cinzel', serif;
    --font-heading: 'Cinzel', 'Noto Serif TC', serif;
}

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

body {
    font-family: var(--font-serif);
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    position: relative;
}

/* Background Effects */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    background:
        linear-gradient(rgba(5, 5, 7, 0.5), rgba(5, 5, 7, 0.8)),
        url('../runes-bg.jpg') center center / cover no-repeat;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out alternate;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: #4a3b10;
    top: -100px;
    left: -100px;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: #230842;
    bottom: -50px;
    right: 10%;
    animation-delay: -5s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: #062735;
    top: 40%;
    left: 40%;
    animation-delay: -10s;
}

@keyframes float {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(50px, 30px) scale(1.1);
    }
}

.rune-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.particle {
    position: absolute;
    color: rgba(255, 255, 255, 0.1);
    font-family: 'Cinzel', serif;
    font-size: 1.5rem;
    animation: drift linear infinite;
}

@keyframes drift {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }

    10% {
        opacity: 0.3;
    }

    90% {
        opacity: 0.3;
    }

    100% {
        transform: translateY(-100px) rotate(360deg);
        opacity: 0;
    }
}

/* Layout Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 5rem;
    animation: fadeInDown 1s ease-out forwards;
}

.subtitle {
    font-size: 1rem;
    letter-spacing: 0.3em;
    color: #d4af37;
    margin-bottom: 1rem;
    text-transform: uppercase;
    font-weight: 400;
}

.title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #fff, #a0a0b0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.1em;
}

.description {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Masters Grid */
.masters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    width: 100%;
}

/* Master Card */
.master-card {
    position: relative;
    background: var(--glass-bg);
    border-radius: 20px;
    padding: 3rem 2rem;
    text-align: center;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    transition: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
    overflow: hidden;
    cursor: pointer;
    opacity: 0;
    transform: translateY(40px);
}

.master-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.master-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 0%, var(--accent-color) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 0;
    mix-blend-mode: screen;
}

.master-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5),
        0 0 20px rgba(var(--accent-color), 0.2);
    border-color: rgba(255, 255, 255, 0.2);
}

.master-card:hover::before {
    opacity: 0.15;
}

.card-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.rune-symbol {
    font-size: 4rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    font-family: sans-serif;
    text-shadow: 0 0 20px var(--accent-color);
    transition: transform 0.5s ease;
}

.master-card:hover .rune-symbol {
    transform: scale(1.1);
}

.master-name {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.master-title {
    color: var(--accent-color);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.master-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2.5rem;
    flex-grow: 1;
}

.select-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1rem;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.select-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.master-card:hover .select-btn {
    background: var(--text-primary);
    color: var(--bg-color);
    border-color: var(--text-primary);
}

.master-card:hover .select-btn::after {
    left: 100%;
}

.btn-icon {
    width: 1.2rem;
    height: 1.2rem;
    transition: transform 0.3s ease;
}

.master-card:hover .btn-icon {
    transform: translateX(4px);
}

/* Responsive */
@media (max-width: 768px) {
    .title {
        font-size: 2.5rem;
    }

    .masters-grid {
        gap: 1.5rem;
    }

    .master-card {
        padding: 2rem 1.5rem;
    }
}

/* Result Area Header */
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.result-header .result-title {
    margin-bottom: 0;
}

/* Rune Name Toggle Switch */
.rune-toggle-container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 10px;
}

.toggle-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-secondary);
    transition: .4s;
}

input:checked+.slider {
    background-color: rgba(212, 175, 55, 0.2);
    border-color: rgba(212, 175, 55, 0.4);
}

input:checked+.slider:before {
    transform: translateX(20px);
    background-color: #d4af37;
}

.slider.round {
    border-radius: 24px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Detailed Information Styles */
.rune-details {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
    text-align: left;
    animation: fadeInDown 0.5s ease-out forwards;
}

.detail-title {
    color: var(--accent-color);
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
    text-shadow: 0 0 10px rgba(var(--accent-color), 0.3);
}

.detail-content {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.inline-detail {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    line-height: 1.6;
}

.detail-label {
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    white-space: nowrap;
    /* 防止標籤折行 */
}

.detail-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.detail-text.inline {
    display: inline;
    color: var(--accent-color);
    font-weight: 600;
}

/* Studio Header */
.studio-header {
    text-align: center;
    margin-bottom: 2rem;
    animation: fadeInDown 1s ease-out;
}

.studio-header h1 {
    font-size: 3.0rem;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #a855f7, #6366f1, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: mysticGlow 3s ease-in-out infinite alternate;
}

@keyframes mysticGlow {
    0% {
        filter: drop-shadow(0 0 8px rgba(168, 85, 247, 0.3));
    }

    100% {
        filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.6)) drop-shadow(0 0 40px rgba(14, 165, 233, 0.4));
    }
}

.studio-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    letter-spacing: 1px;
}