/* Japanese Martial Arts Theme - Aikido Techniques */

:root {
    --primary: #8C0303;       /* Deep red - symbolizes energy and passion */
    --secondary: #1A1A1A;     /* Near black - represents discipline */
    --accent: #D4AF37;        /* Gold - symbolizes achievement */
    --light: #F5F5F5;         /* Off-white - represents purity */
    --dark: #0D0D0D;          /* Deep black - represents focus */
    --paper: #F8F0E3;         /* Rice paper color - traditional Japanese */
    --shadow: rgba(0, 0, 0, 0.2);
    
    /* Kyu level colors */
    --kyu-5: #ffd600;
    --kyu-4: #ff9800;
    --kyu-3: #4caf50;
    --kyu-2: #2196f3;
    --kyu-1: #795548;
}

body {
    font-family: 'Noto Sans JP', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--paper);
    color: var(--dark);
    background-image: url('data:image/svg+xml;utf8,<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><rect width="20" height="20" fill="none" stroke="%23D4AF37" stroke-width="0.5" stroke-opacity="0.1"/></svg>');
    background-size: 20px 20px;
}

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

/* Header with logo and founder image */
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    position: relative;
}

.title-container {
    flex-grow: 1;
    text-align: center;
}

.logo-container {
    position: absolute;
    top: 0;
    right: 0;
}

.founder-container {
    position: absolute;
    top: 0;
    left: 0;
}

.founder-image {
    width: 120px;
    height: auto;
    border-radius: 50%;
    border: 2px solid var(--accent);
    transition: all 0.3s ease;
}

.founder-image:hover {
    transform: scale(1.05);
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.5);
}

.ffaaa-logo {
    width: 256px;
    height: auto;
    max-width: 100%;
}

h1 {
    text-align: center;
    margin-bottom: 5px;
    color: var(--primary);
    font-weight: 700;
    position: relative;
    padding-bottom: 10px;
    font-family: 'Noto Serif JP', serif;
}

.subtitle {
    text-align: center;
    margin-top: 0;
    margin-bottom: 30px;
    color: var(--secondary);
    font-size: 1.2em;
    font-style: italic;
}

h1::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background-color: var(--accent);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

button {
    padding: 8px 16px;
    background-color: var(--secondary);
    color: var(--light);
    border: 1px solid var(--accent);
    border-radius: 0;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Noto Sans JP', sans-serif;
    position: relative;
    overflow: hidden;
}

button::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width 0.3s;
}

button:hover {
    background-color: var(--dark);
}

button:hover::after {
    width: 100%;
}

button.active {
    background-color: var(--primary);
    border-color: var(--primary);
}

.kyu-filter {
    text-align: center;
    margin-bottom: 30px;
    background-color: var(--secondary);
    padding: 15px;
    border-left: 4px solid var(--primary);
    position: relative;
}

.kyu-filter::before {
    content: "段階";
    position: absolute;
    top: -10px;
    left: 10px;
    background-color: var(--accent);
    color: var(--dark);
    padding: 0 10px;
    font-size: 0.8em;
    font-family: 'Noto Serif JP', serif;
}

.kyu-filter span {
    display: block;
    margin-bottom: 10px;
    font-weight: bold;
    color: var(--light);
}

.kyu-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}

.kyu-button {
    padding: 6px 12px;
    font-size: 0.9em;
    background-color: var(--dark);
}

.kyu-button[data-kyu="5"] {
    border-bottom: 3px solid var(--kyu-5);
}

.kyu-button[data-kyu="4"] {
    border-bottom: 3px solid var(--kyu-4);
}

.kyu-button[data-kyu="3"] {
    border-bottom: 3px solid var(--kyu-3);
}

.kyu-button[data-kyu="2"] {
    border-bottom: 3px solid var(--kyu-2);
}

.kyu-button[data-kyu="1"] {
    border-bottom: 3px solid var(--kyu-1);
}

.waza-section {
    margin-bottom: 30px;
    box-shadow: 0 4px 8px var(--shadow);
}

.waza-header {
    background-color: var(--primary);
    color: var(--light);
    padding: 10px 15px;
    margin-bottom: 0;
    text-transform: capitalize;
    font-family: 'Noto Serif JP', serif;
    letter-spacing: 1px;
    position: relative;
}

.waza-header::before {
    content: "〜";
    position: absolute;
    left: 5px;
    opacity: 0.5;
}

.technique {
    background-color: var(--light);
    padding: 15px;
    margin-bottom: 15px;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 3px solid var(--primary);
    position: relative;
    overflow: hidden;
}

.technique::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 20px 20px 0;
    border-color: transparent var(--accent) transparent transparent;
    opacity: 0.3;
}

.technique h2 {
    margin-top: 0;
    color: var(--primary);
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 10px;
    font-family: 'Noto Serif JP', serif;
}

.waza-type {
    font-weight: bold;
    margin-top: 10px;
    color: var(--secondary);
    padding-left: 10px;
    border-left: 2px solid var(--accent);
}

.attack-list {
    list-style-type: none;
    padding-left: 20px;
}

.attack-item {
    padding: 5px 0;
    display: flex;
    align-items: center;
    border-bottom: 1px dotted #e2e8f0;
}

.attack-section {
    margin-bottom: 15px;
    background-color: var(--light);
    padding: 10px;
    border-left: 2px solid var(--accent);
}

.attack-header {
    font-weight: bold;
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    color: var(--secondary);
}

.techniques-list {
    list-style-type: none;
    padding-left: 20px;
}

.technique-item {
    padding: 5px 0;
    display: flex;
    align-items: center;
    border-bottom: 1px dotted #e2e8f0;
}

.checkbox {
    margin-right: 10px;
}

.kyu-tag {
    display: inline-block;
    border-radius: 0;
    padding: 2px 8px;
    font-size: 0.8em;
    margin-left: 8px;
    font-family: 'Noto Sans JP', sans-serif;
    position: relative;
}

.kyu-tag::before {
    content: "第";
    font-size: 0.8em;
    margin-right: 2px;
}

.kyu-tag[data-kyu="5"] {
    background-color: var(--kyu-5);
    color: #000;
}

.kyu-tag[data-kyu="4"] {
    background-color: var(--kyu-4);
    color: #000;
}

.kyu-tag[data-kyu="3"] {
    background-color: var(--kyu-3);
    color: #fff;
}

.kyu-tag[data-kyu="2"] {
    background-color: var(--kyu-2);
    color: #fff;
}

.kyu-tag[data-kyu="1"] {
    background-color: var(--kyu-1);
    color: #fff;
}

.youtube-link {
    margin-left: 8px;
    color: var(--primary);
    text-decoration: none;
    font-size: 0.9em;
}

.youtube-icon {
    background-color: var(--primary);
    color: white;
    padding: 2px 5px;
    border-radius: 0;
    font-size: 0.8em;
    transition: all 0.3s;
}

.youtube-link:hover .youtube-icon {
    background-color: #ff0000;
    transform: scale(1.1);
}

.hidden {
    display: none;
}

/* Japanese-inspired decorative elements */
.container::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
    z-index: 1000;
}

footer {
    margin-top: 40px;
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid var(--accent);
    color: var(--secondary);
    position: relative;
}

.footer-content {
    position: relative;
}

.kanji-decoration {
    position: absolute;
    top: -30px;
    right: 20px;
    font-family: 'Noto Serif JP', serif;
    font-size: 3em;
    color: var(--primary);
    opacity: 0.2;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .kyu-filter {
        padding: 10px;
    }
    
    .technique {
        padding: 10px;
    }
    
    .kanji-decoration {
        display: none;
    }
    
    .header-container {
        flex-direction: column;
        padding-top: 80px;
    }
    
    .logo-container {
        position: absolute;
        top: 0;
        right: 0;
        margin-bottom: 15px;
    }
    
    .founder-container {
        position: absolute;
        top: 0;
        left: 0;
    }
    
    .ffaaa-logo {
        width: 150px;
    }
    
    .founder-image {
        width: 80px;
    }
}