/* ===================================
   RESET & BASE STYLES
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors - Traditional Palette */
    --color-black: #1a1a1a;
    --color-white: #f5f5f5;
    --color-off-white: #e8e8e8;
    --color-charcoal: #2d2d2d;
    --color-gray: #4a4a4a;
    --color-light-gray: #d0d0d0;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    /* Typography */
    --font-display: 'Cinzel', serif;
    --font-body: 'Noto Serif', serif;
    --font-accent: 'Noto Sans JP', sans-serif;

    /* Transitions */
    --transition-smooth: 0.3s ease-out;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-white);
    color: var(--color-black);
    line-height: 1.8;
    overflow-x: hidden;
}

.jb-watermark {
    position: fixed;
    right: 0.45rem;
    bottom: 0.4rem;
    z-index: 120;
    font-size: 0.56rem;
    letter-spacing: 0.03em;
    text-decoration: none;
    color: rgba(0, 0, 0, 0.4);
    background: transparent;
    border: 0;
    padding: 0;
    border-radius: 0;
    opacity: 0.55;
    transition: opacity 0.2s ease, color 0.2s ease;
}

.jb-watermark:hover,
.jb-watermark:focus {
    color: rgba(0, 0, 0, 0.62);
    opacity: 0.8;
}

/* ===================================
   TRADITIONAL BACKGROUND
   =================================== */
.background-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(0deg,
            transparent,
            transparent 2px,
            rgba(0, 0, 0, 0.02) 2px,
            rgba(0, 0, 0, 0.02) 4px);
    z-index: 0;
    opacity: 0.5;
    pointer-events: none;
}

.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(0, 0, 0, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 0, 0, 0.03) 0%, transparent 50%);
    z-index: 1;
    pointer-events: none;
}

.navbar {
    position: relative;
    z-index: 50;
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    position: relative;
    z-index: 2;
    min-height: 38vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
    border-bottom: 3px solid var(--color-black);
}

.hero-content {
    position: relative;
}

.glitch {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    position: relative;
    display: inline-block;
    color: var(--color-black);
}

.glitch::before,
.glitch::after {
    display: none;
}

.subtitle {
    font-family: var(--font-accent);
    font-size: clamp(0.9rem, 2vw, 1.2rem);
    font-weight: 400;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    margin-top: var(--spacing-md);
    color: var(--color-gray);
}

.hero-line {
    width: 80px;
    height: 3px;
    background: var(--color-black);
    margin: var(--spacing-md) auto 0;
}

/* ===================================
   CONTAINER
   =================================== */
.container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xxl) var(--spacing-md);
}

/* ===================================
   INSTRUCTOR CARDS
   =================================== */
.instructor-card {
    position: relative;
    margin-bottom: var(--spacing-xxl);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.instructor-card:nth-child(1) {
    animation-delay: 0.2s;
}

.instructor-card:nth-child(2) {
    animation-delay: 0.4s;
}

.instructor-card:nth-child(3) {
    animation-delay: 0.6s;
}

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

.card-border {
    position: absolute;
    top: -10px;
    left: -10px;
    right: 10px;
    bottom: 10px;
    border: 2px solid var(--color-black);
    z-index: -1;
    transition: all var(--transition-smooth);
}

.instructor-card:hover .card-border {
    top: -15px;
    left: -15px;
    right: 15px;
    bottom: 15px;
}

.card-content {
    position: relative;
    background: var(--color-white);
    border: 3px solid var(--color-black);
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: var(--spacing-lg);
    transition: transform var(--transition-smooth);
}

.instructor-card:hover .card-content {
    transform: translate(5px, 5px);
}

/* ===================================
   INSTRUCTOR IMAGE
   =================================== */
.instructor-image {
    position: relative;
}

.image-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
    border: 4px solid var(--color-black);
    box-shadow: inset 0 0 0 8px var(--color-white);
}

.image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.1);
    transition: all var(--transition-smooth);
}

.image-frame video {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: grayscale(100%) contrast(1.1);
    transition: all var(--transition-smooth);
    background: #000;
    pointer-events: none;
}

.instructor-card:hover .image-frame img {
    filter: grayscale(80%) contrast(1.05);
    transform: scale(1.02);
}

.image-overlay {
    display: none;
}

.rank-badge {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-black);
    color: var(--color-white);
    border: 3px solid var(--color-white);
    box-shadow: 0 0 0 3px var(--color-black);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
}

.belt-icon {
    font-size: 1.2rem;
}

.belt-text {
    font-family: var(--font-accent);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* ===================================
   INSTRUCTOR INFO
   =================================== */
.instructor-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding-top: var(--spacing-sm);
}

.instructor-name {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.2;
    color: var(--color-black);
    border-bottom: 3px solid var(--color-black);
    padding-bottom: var(--spacing-sm);
}

.instructor-title {
    font-family: var(--font-accent);
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--color-gray);
    margin-top: -var(--spacing-sm);
}

/* ===================================
   STATS GRID
   =================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-top: 2px solid var(--color-light-gray);
    border-bottom: 2px solid var(--color-light-gray);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-sm);
    background: var(--color-off-white);
    border: 2px solid var(--color-black);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-black);
}

.stat-label {
    font-family: var(--font-accent);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-gray);
    margin-top: var(--spacing-xs);
}

/* ===================================
   BIO & SPECIALTIES
   =================================== */
.instructor-bio {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-charcoal);
    text-align: justify;
    font-style: italic;
    border-left: 4px solid var(--color-black);
    padding-left: var(--spacing-md);
}

.specialties {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.specialty-tag {
    font-family: var(--font-accent);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-white);
    color: var(--color-black);
    border: 2px solid var(--color-black);
    transition: all var(--transition-smooth);
    cursor: default;
}

.specialty-tag:hover {
    background: var(--color-black);
    color: var(--color-white);
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    position: relative;
    z-index: 2;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    border-top: 3px solid var(--color-black);
    background: var(--color-off-white);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-text {
    font-family: var(--font-accent);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gray);
}

.footer-line {
    width: 60px;
    height: 2px;
    background: var(--color-black);
    margin: var(--spacing-md) auto 0;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 1024px) {
    .card-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .instructor-image {
        max-width: 350px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .hero {
        min-height: 40vh;
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }

    .stat {
        padding: var(--spacing-xs);
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .stat-label {
        font-size: 0.65rem;
    }

    .instructor-bio {
        font-size: 0.95rem;
        text-align: left;
    }

    .card-content {
        padding: var(--spacing-md);
    }

    .container {
        padding: var(--spacing-xl) var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .instructor-card {
        margin-bottom: var(--spacing-lg);
    }

    .specialty-tag {
        font-size: 0.65rem;
        padding: 6px 12px;
    }

    .card-border {
        top: -5px;
        left: -5px;
        right: 5px;
        bottom: 5px;
    }
}

/* ===================================
   ACCESSIBILITY
   =================================== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 3px solid var(--color-black);
    outline-offset: 4px;
}