:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f8fafc;
    --accent-color: #38bdf8;
    --accent-hover: #0ea5e9;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Noto Sans JP', 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header */
.siteHeader {
    padding: 1.5rem 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

@media (max-width: 768px) {
    .siteHeader {
        padding: 0.8rem 1rem;
    }
}

.siteHeader h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--accent-color), #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

@media (max-width: 768px) {
    .siteHeader h1 {
        font-size: 1.1rem;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Manga List */
.manga-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 2rem;
}

.manga-card {
    background: var(--card-bg);
    border-radius: 1rem;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.manga-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.manga-card .cover {
    aspect-ratio: 2 / 3;
    overflow: hidden;
    background: #000;
}

.manga-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.manga-card:hover img {
    transform: scale(1.05);
}

.manga-card .info {
    padding: 1rem;
}

.manga-card .title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

/* Viewer */
.viewer-container {
    width: 100vw;
    height: calc(100vh - 70px);
    display: flex;
    flex-direction: column;
}

.viewer-controls {
    padding: 1rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(5px);
}

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-color);
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

/* Spread Mode (PC) */
.viewer-main.spread-mode {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

.spread-wrapper {
    display: flex;
    height: 90%;
    gap: 2px;
    background: #000;
}

.spread-wrapper img {
    height: 100%;
    width: auto;
}

/* Vertical Mode (Tateyomi) */
.viewer-main.vertical-mode {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.vertical-mode img {
    width: 100%;
    max-width: 800px;
    height: auto;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    width: 90%;
    max-width: 500px;
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.modal-close {
    cursor: pointer;
    font-size: 1.5rem;
}

textarea {
    width: 100%;
    height: 120px;
    background: #0f172a;
    color: #fff;
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    resize: none;
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem;
    color: #64748b;
    font-size: 0.9rem;
}

/* Admin / Comment Styles */
.comment-item {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.8rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--accent-color);
}

.comment-meta {
    font-size: 0.8rem;
    color: #94a3b8;
    margin-bottom: 0.5rem;
}

.comment-text {
    font-size: 1rem;
}