/* ========================
   VARIABLES & RESET
   ======================== */

:root {
    --primary-black: #0a0a0a;
    --secondary-black: #1a1a1a;
    --text-dark: #2d2d2d;
    --text-light: #555555;
    --accent-red: #ff4b00;
    --accent-gold: #ff4b00;
    --white: #fafaf8;
    --border-dark: #2a2a2a;
    --border-light: #d4d4d0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 3px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.18);
    --transition: all 0.2s ease-out;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.6;
}

/* ========================
   TYPOGRAPHY
   ======================== */

h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Serif', Georgia, serif;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.5em;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 1em;
}

/* ========================
   NAVIGATION
   ======================== */

.navbar {
    position: sticky;
    top: 0;
    background: var(--white);
    border-bottom: 2px solid var(--primary-black);
    z-index: 1000;
    box-shadow: none;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.8;
}

.logo-img {
    height: 45px;
    width: 45px;
    object-fit: contain;
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.logo-name {
    font-family: 'Noto Serif', Georgia, serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-black);
    letter-spacing: 0.05em;
    line-height: 1.2;
}

.logo-subtitle {
    font-family: 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    color: var(--accent-red);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-size: 0.95rem;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-red);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 5px 0;
    transition: var(--transition);
    border-radius: 2px;
}

/* ========================
   HERO SECTION
   ======================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--secondary-black) 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero-accent {
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-red) 0%, transparent 70%);
    opacity: 0.15;
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, 30px); }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 800px;
    padding: 2rem;
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    animation: slideUp 1s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
    font-weight: 300;
    animation: slideUp 1s ease-out 0.4s both;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================
   BUTTONS
   ======================== */

.cta-button {
    display: inline-block;
    padding: 0.875rem 2rem;
    background: var(--accent-red);
    color: var(--white);
    border: none;
    border-radius: 2px;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: left 0.3s ease;
}

.cta-button:hover {
    background: #b71c1c;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button-large {
    padding: 1.125rem 3rem;
    font-size: 1.1rem;
}

/* ========================
   CONTAINER & LAYOUT
   ======================== */

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

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-weight: 600;
    letter-spacing: 0.05em;
}

.accent-line {
    width: 60px;
    height: 3px;
    background: var(--accent-red);
    margin: 1rem auto 0;
}

/* ========================
   SECTIONS SPACING
   ======================== */

section {
    padding: 6rem 0;
}

/* ========================
   ABOUT SECTION
   ======================== */

.about {
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: start;
}

.about-text {
    order: 2;
    padding-right: 2rem;
}

.about-values {
    order: 1;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.value-card {
    padding: 2rem;
    background: #f5f5f3;
    border-left: 4px solid var(--accent-red);
    transition: var(--transition);
}

.value-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.value-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.value-card h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-black);
}

.value-card p {
    font-size: 0.95rem;
    margin: 0;
}

/* ========================
   TRAINING BENEFITS
   ======================== */

.training {
    background: linear-gradient(180deg, #f9f9f9 0%, #ffffff 100%);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.benefit-item:nth-child(odd) {
    margin-top: 0;
}

.benefit-item:nth-child(even) {
    margin-top: 2rem;
}

.benefit-item {
    padding: 2rem;
    background: var(--white);
    box-shadow: none;
    transition: var(--transition);
    border-top: 4px solid var(--accent-red);
    border: 1px solid var(--border-light);
}

.benefit-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.benefit-number {
    display: inline-block;
    font-family: 'Noto Serif JP', serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-red);
    margin-bottom: 1rem;
    opacity: 0.8;
}

.benefit-item h3 {
    color: var(--primary-black);
    margin-bottom: 1rem;
}

.benefit-item p {
    font-size: 0.95rem;
    margin: 0;
}

/* ========================
   TRAINING STRUCTURE
   ======================== */

.training-structure {
    background: var(--secondary-black);
    color: var(--white);
}

.training-structure .section-header {
    color: var(--white);
}

.training-structure .accent-line {
    background: var(--accent-gold);
}

.structure-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.structure-card {
    padding: 2rem;
    background: #f5f5f3;
    border: 1px solid var(--border-light);
    backdrop-filter: none;
    transition: var(--transition);
    text-align: center;
    user-select: none;
    color: var(--text-dark);
}

.structure-card:hover {
    background: #f5f5f3;
    border-color: var(--border-light);
    transform: none;
}

.structure-card h4 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    user-select: none;
}

.structure-card p {
    color: var(--text-dark);
    margin: 0;
    font-size: 0.95rem;
    user-select: none;
}

/* ========================
   INSTRUCTORS SECTION
   ======================== */

.instructors {
    background: var(--white);
}

.instructors-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 4rem;
}

.instructor-card:last-child {
    margin-top: 2rem;
}

.instructor-card {
    text-align: center;
    padding: 2rem;
    background: #f5f5f3;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.instructor-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.instructor-avatar {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    display: block;
    object-fit: cover;
    box-shadow: var(--shadow-md);
    border: 3px solid var(--white);
}

.instructor-card h3 {
    color: var(--primary-black);
    margin-bottom: 0.25rem;
}

.instructor-rank {
    color: var(--accent-red);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.instructor-bio {
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ========================
   CTA SECTION
   ======================== */

.cta-section {
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--secondary-black) 100%);
    color: var(--white);
    text-align: center;
    padding: 5rem 2rem;
}

.cta-section h2 {
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
}

/* ========================
   KEIKO SECTION
   ======================== */

.keiko {
    background: var(--white);
}

.keiko-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.keiko-item {
    padding: 2rem;
    background: #f5f5f3;
    border-top: 4px solid var(--accent-red);
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.keiko-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.keiko-item h3 {
    color: var(--primary-black);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.keiko-item p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========================
   SHUGYO SECTION
   ======================== */

.shugyo {
    background: linear-gradient(180deg, #f9f9f9 0%, var(--white) 100%);
}

.shugyo-text {
    max-width: 900px;
    margin: 0 auto;
}

.shugyo-text p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.shugyo-text p:last-child {
    margin-bottom: 0;
}

/* ========================
   GALLERY SECTION
   ======================== */

.gallery {
    background: var(--white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.gallery-grid img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    box-shadow: none;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.gallery-grid img:hover {
    transform: scale(1.02);
    box-shadow: none;
}

/* ========================
   CONTACT SECTION
   ======================== */

.contact {
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--secondary-black) 100%);
    color: var(--white);
}

.contact .section-header {
    color: var(--white);
}

.contact .accent-line {
    background: var(--accent-gold);
}

.contact-info-full {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
}

.contact-block {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-left: 4px solid var(--accent-gold);
    transition: var(--transition);
}

.contact-block:hover {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.contact-block h3 {
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.contact-block p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
}

.contact-block a {
    color: var(--accent-gold);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.contact-block a:hover {
    text-decoration: underline;
}

/* ========================
   FOOTER
   ======================== */

.footer {
    background: var(--primary-black);
    color: var(--white);
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links {
    margin-top: 1rem;
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-red);
}

/* ========================
   RESPONSIVE DESIGN
   ======================== */

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        gap: 0;
        display: none;
        box-shadow: var(--shadow-md);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-link {
        padding: 1rem 2rem;
        border-bottom: 1px solid var(--border-light);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    h2 {
        font-size: 2rem;
    }

    .about-grid,
    .contact-grid,
    .contact-info-full {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .structure-cards {
        grid-template-columns: 1fr;
    }

    .keiko-grid {
        grid-template-columns: 1fr;
    }

    .instructors-grid {
        grid-template-columns: 1fr;
    }

    section {
        padding: 3rem 0;
    }

    .section-header {
        margin-bottom: 2rem;
    }

    .nav-container {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .cta-button {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .container {
        padding: 0 1rem;
    }

    .benefit-item,
    .value-card {
        padding: 1.5rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}