/* ========================================
   ADEN-Inspired Modern Design
   Color Scheme: Monochrome (Black, White, Gray)
======================================== */

/* ========================================
   CSS Variables
======================================== */
:root {
    /* Colors */
    --color-primary: #000000;
    --color-secondary: #1a1a1a;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-dark: #f5f5f5;
    --color-accent: #2d2d2d;
    --color-border: #e0e0e0;

    /* Typography */
    --font-primary: 'Noto Serif JP', serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    --font-weight-black: 900;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.6s ease;
}

/* ========================================
   Reset & Base Styles
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    font-weight: var(--font-weight-regular);
    line-height: 1.8;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    max-width: 100vw;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

ul {
    list-style: none;
}

/* ========================================
   Container
======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ========================================
   Header
======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all var(--transition-slow);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.header.scrolled {
    border-bottom: 2px solid rgba(0, 0, 0, 0.12);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 18px;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    line-height: 1.5;
    letter-spacing: 3px;
    cursor: pointer;
    position: relative;
}

.logo h1::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 1px;
    background: linear-gradient(to right, var(--color-primary), transparent);
}

.logo h1 span {
    font-size: 11px;
    font-weight: var(--font-weight-light);
    color: var(--color-text-light);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.nav-list {
    display: flex;
    gap: 40px;
    align-items: center;
}

.nav-link {
    font-size: 14px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    letter-spacing: 2px;
    position: relative;
    padding: 8px 0;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: width var(--transition-slow);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: width var(--transition-slow);
}

.nav-link:hover::before,
.nav-link.active-link::before,
.nav-link:hover::after,
.nav-link.active-link::after {
    width: 50%;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 0;
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ========================================
   First View - ADEN Style
======================================== */
.fv {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.fv-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.fv-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.5) contrast(1.1);
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.fv-image.active {
    opacity: 1;
}

.fv-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-bg);
    padding: 0 40px;
    max-width: 1000px;
}

.fv-badge {
    display: inline-block;
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    letter-spacing: 6px;
    padding: 20px 48px;
    border: 1px solid rgba(255, 255, 255, 0.85);
    margin-bottom: 50px;
    opacity: 0;
    animation: fadeInUp 1.2s ease 0.2s forwards;
    position: relative;
    backdrop-filter: blur(8px);
    background-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2), inset 0 1px 2px rgba(255, 255, 255, 0.15);
}

.fv-badge::before,
.fv-badge::after {
    content: '◆';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 8px;
    opacity: 0.7;
}

.fv-badge::before {
    left: 16px;
}

.fv-badge::after {
    right: 16px;
}

.fv-subtitle {
    font-size: 13px;
    font-weight: var(--font-weight-light);
    margin-bottom: 40px;
    letter-spacing: 5px;
    opacity: 0;
    animation: fadeInUp 1.2s ease 0.5s forwards;
    position: relative;
}

.fv-subtitle::before,
.fv-subtitle::after {
    content: '─';
    margin: 0 18px;
    opacity: 0.6;
}

.fv-title {
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: var(--font-weight-medium);
    line-height: 1.75;
    margin-bottom: 35px;
    letter-spacing: 3px;
    opacity: 0;
    animation: fadeInUp 1.2s ease 0.8s forwards;
}

.fv-description {
    font-size: 16px;
    font-weight: var(--font-weight-light);
    margin-bottom: 50px;
    letter-spacing: 5px;
    opacity: 0;
    animation: fadeInUp 1.2s ease 1.1s forwards;
    position: relative;
}

.fv-description::before,
.fv-description::after {
    content: '•';
    margin: 0 16px;
    opacity: 0.5;
}

.fv-tagline {
    font-size: 18px;
    font-weight: var(--font-weight-medium);
    margin-bottom: 50px;
    letter-spacing: 2px;
    opacity: 0;
    animation: fadeInUp 1.2s ease 1.4s forwards;
    position: relative;
}

.btn-primary {
    display: inline-block;
    background-color: transparent;
    color: var(--color-bg);
    padding: 15px 50px;
    border: 1px solid var(--color-bg);
    font-size: 13px;
    font-weight: var(--font-weight-light);
    letter-spacing: 3px;
    opacity: 0;
    animation: fadeInUp 1s ease 1.2s forwards;
    transition: all var(--transition-base);
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Section Common Styles
======================================== */
section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section-title h2 {
    font-size: clamp(28px, 3.2vw, 38px);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    margin-bottom: 30px;
    letter-spacing: 12px;
    text-transform: uppercase;
    position: relative;
    display: inline-block;
    padding: 0 50px;
}

.section-title h2::before {
    content: '◆';
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
    opacity: 0.4;
}

.section-title h2::after {
    content: '◆';
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
    opacity: 0.4;
}

.section-title::after {
    content: '';
    display: block;
    width: 120px;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-primary) 20%, var(--color-primary) 80%, transparent);
    margin: 40px auto 0;
    position: relative;
}

.section-title::before {
    content: '✦';
    position: absolute;
    left: 50%;
    bottom: -8px;
    transform: translateX(-50%);
    font-size: 12px;
    color: var(--color-primary);
    opacity: 0.3;
}

.section-subtitle {
    font-size: 13px;
    color: var(--color-text-light);
    font-weight: var(--font-weight-light);
    letter-spacing: 5px;
}

/* ========================================
   Concept Section
======================================== */
.concept {
    background-color: var(--color-bg-dark);
}

.concept-content {
    max-width: 1000px;
    margin: 0 auto;
}

.concept-main {
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding: 0 20px;
}

.concept-heading {
    font-size: clamp(28px, 2.8vw, 38px);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    margin-bottom: 30px;
    letter-spacing: 8px;
    position: relative;
    padding: 0 45px;
}

.concept-heading::before {
    content: '「';
    position: absolute;
    left: 10px;
    top: 0;
    font-size: 32px;
    opacity: 0.3;
}

.concept-heading::after {
    content: '」';
    position: absolute;
    right: 10px;
    top: 0;
    font-size: 32px;
    opacity: 0.3;
}

.concept-text {
    font-size: 16px;
    line-height: 2.2;
    color: var(--color-text);
    font-weight: var(--font-weight-light);
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

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

.concept-philosophy {
    background-color: var(--color-bg);
    padding: var(--spacing-lg) var(--spacing-xl);
    border: none;
    border-left: 3px double var(--color-primary);
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.04);
}

.philosophy-title {
    font-size: 20px;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    text-align: center;
    margin-bottom: 35px;
    letter-spacing: 5px;
    position: relative;
    padding: 0 40px;
}

.philosophy-title::before {
    content: '"';
    font-size: 42px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: -22px;
    opacity: 0.15;
    font-family: Georgia, serif;
}

.philosophy-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-primary), transparent);
    margin: 20px auto 0;
}

.philosophy-text {
    font-size: 16px;
    line-height: 2.2;
    color: var(--color-text);
    margin-bottom: 24px;
    font-weight: var(--font-weight-light);
    letter-spacing: 0.5px;
}

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

/* ========================================
   Philosophy Sections
======================================== */
.philosophy-section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.philosophy-section.health {
    background-color: var(--color-bg);
}

.philosophy-section.training {
    background-color: var(--color-bg-dark);
}

.philosophy-section.face-to-face {
    background-color: var(--color-bg);
}

.philosophy-section.nutrition {
    background-color: var(--color-bg-dark);
}

.philosophy-section.system {
    background-color: var(--color-bg);
}

.philosophy-section.message {
    background-color: var(--color-bg-dark);
}

.philosophy-section.contact {
    background-color: var(--color-bg);
}

.philosophy-content {
    max-width: 920px;
    margin: 0 auto;
    text-align: center;
}

.philosophy-heading {
    font-size: clamp(28px, 2.8vw, 38px);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    margin-bottom: 25px;
    letter-spacing: 6px;
    position: relative;
    display: inline-block;
    padding: 0;
}

.philosophy-heading::before {
    content: '';
    display: none;
}

.philosophy-heading::after {
    content: '';
    display: block;
    width: 90px;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-primary) 30%, var(--color-primary) 70%, transparent);
    margin: 38px auto 0;
    position: relative;
}

.philosophy-subtitle {
    font-size: 14px;
    color: var(--color-text-light);
    font-weight: var(--font-weight-light);
    letter-spacing: 5px;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.philosophy-subtitle::before,
.philosophy-subtitle::after {
    content: '─';
    margin: 0 20px;
    opacity: 0.4;
}

.philosophy-text-wrapper {
    margin-top: var(--spacing-lg);
    text-align: left;
    background-color: transparent;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-left: 3px solid var(--color-primary);
    border-left-style: double;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.02);
}

.philosophy-section.training .philosophy-text-wrapper,
.philosophy-section.nutrition .philosophy-text-wrapper {
    background-color: var(--color-bg);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.04);
}

.philosophy-text-wrapper .philosophy-text {
    font-size: 16px;
    line-height: 2.2;
    color: var(--color-text);
    margin-bottom: 28px;
    font-weight: var(--font-weight-light);
    letter-spacing: 0.5px;
}

.philosophy-text-wrapper .philosophy-text:last-of-type {
    margin-bottom: 28px;
}

.philosophy-closing {
    font-size: 16px;
    line-height: 2.2;
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    text-align: center;
    padding-top: 28px;
    border-top: 2px double var(--color-border);
    letter-spacing: 1.5px;
    margin-bottom: 0;
}

/* ========================================
   Profile Section
======================================== */
.profile {
    background-color: var(--color-bg-dark);
    padding: var(--spacing-xxl) 0;
}

.profile-content {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.profile-image {
    position: sticky;
    top: 120px;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.profile-image.profile-revealed {
    opacity: 1;
    transform: scale(1);
}

.profile-image img {
    width: 100%;
    filter: grayscale(20%);
    transition: filter var(--transition-slow);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
}

.profile-image:hover img {
    filter: grayscale(0%);
}

.profile-info {
    background-color: var(--color-bg);
    padding: var(--spacing-lg) var(--spacing-xl);
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.04);
}

.profile-name {
    font-size: 28px;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    margin-bottom: 20px;
    letter-spacing: 2px;
    position: relative;
    line-height: 1.6;
}

.profile-name::after {
    content: '';
    display: block;
    width: 80px;
    height: 1px;
    background: linear-gradient(to right, var(--color-primary), transparent);
    margin-top: 18px;
}

.profile-name-en {
    font-size: 18px;
    font-weight: var(--font-weight-light);
    color: var(--color-text-light);
    letter-spacing: 4px;
}

.profile-birth {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 35px;
    font-weight: var(--font-weight-light);
    letter-spacing: 0.5px;
    line-height: 2.0;
}

.profile-section {
    margin-bottom: 35px;
}

.profile-section:last-child {
    margin-bottom: 0;
}

.profile-section h4 {
    font-size: 14px;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.profile-section p {
    font-size: 15px;
    line-height: 2.2;
    color: var(--color-text);
    margin-bottom: 18px;
    font-weight: var(--font-weight-light);
    letter-spacing: 0.5px;
}

.profile-highlight {
    font-size: 19px;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    background-color: transparent;
    padding: 38px 35px;
    text-align: center;
    border: 1px solid var(--color-border);
    letter-spacing: 1.5px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
}

.profile-certifications {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.profile-certifications li {
    background-color: var(--color-primary);
    color: var(--color-bg);
    padding: 10px 24px;
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    letter-spacing: 1px;
}

/* プロフィール情報リスト（経歴用） */
.profile-section:first-child .profile-certifications li {
    background-color: transparent;
    color: var(--color-text);
    padding: 8px 0;
    font-size: 15px;
    font-weight: var(--font-weight-light);
    letter-spacing: 0.5px;
    line-height: 2.2;
    border-left: 2px solid var(--color-primary);
    padding-left: 16px;
    width: 100%;
}

.profile-closing {
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    text-align: center;
    padding-top: 15px;
    font-size: 15px;
}

/* ========================================
   Footer
======================================== */
.footer {
    background-color: var(--color-primary);
    color: var(--color-bg);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    position: relative;
}

.footer-content::after {
    content: '◆';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 8px;
    opacity: 0.3;
}

.footer-brand h3 {
    font-size: 17px;
    font-weight: var(--font-weight-medium);
    margin-bottom: 16px;
    letter-spacing: 3px;
}

.footer-tagline {
    font-size: 12px;
    font-weight: var(--font-weight-light);
    color: rgba(255, 255, 255, 0.55);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.footer-tagline::before,
.footer-tagline::after {
    content: '•';
    margin: 0 12px;
    opacity: 0.4;
}

.footer-social-title {
    font-size: 11px;
    font-weight: var(--font-weight-medium);
    margin-bottom: 20px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    font-size: 18px;
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--color-bg);
    transition: height var(--transition-slow);
    z-index: 0;
}

.social-link:hover::before {
    height: 100%;
}

.social-link:hover {
    color: var(--color-primary);
    border-color: var(--color-bg);
}

.social-link i {
    position: relative;
    z-index: 1;
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.4);
    font-weight: var(--font-weight-light);
    letter-spacing: 2px;
}

/* ========================================
   Scroll Reveal Animation
======================================== */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Fade In (フェードインのみ) */
.reveal-fade {
    opacity: 0;
    transition: opacity 1s ease;
}

.reveal-fade.active {
    opacity: 1;
}

/* Slide from Left (左からスライド) */
.reveal-left {
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

/* Slide from Right (右からスライド) */
.reveal-right {
    opacity: 0;
    transform: translateX(60px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

/* Scale Up (拡大) */
.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-scale.active {
    opacity: 1;
    transform: scale(1);
}

/* Delay variations (遅延バリエーション) */
.reveal-delay-1 {
    transition-delay: 0.1s;
}

.reveal-delay-2 {
    transition-delay: 0.2s;
}

.reveal-delay-3 {
    transition-delay: 0.3s;
}

.reveal-delay-4 {
    transition-delay: 0.4s;
}

/* ========================================
   Responsive Design
======================================== */

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --spacing-lg: 3.5rem;
        --spacing-xl: 5rem;
        --spacing-xxl: 6rem;
    }

    .container {
        padding: 0 30px;
    }

    .section-title h2 {
        font-size: clamp(22px, 2.8vw, 28px);
        letter-spacing: 6px;
        padding: 0 40px;
    }

    .section-title h2::before {
        left: 10px;
    }

    .section-title h2::after {
        right: 10px;
    }

    .section-title::after {
        margin: 25px auto 0;
    }

    .profile-content {
        grid-template-columns: 280px 1fr;
        gap: var(--spacing-lg);
    }

    .profile-image {
        top: 100px;
    }

    .philosophy-text-wrapper {
        padding: var(--spacing-md) var(--spacing-md);
    }

    .philosophy-text {
        font-size: 15px;
        line-height: 2.0;
    }

    .philosophy-closing {
        font-size: 15px;
        line-height: 2.0;
    }

    .concept-heading {
        padding: 0 40px;
    }

    .concept-heading::before {
        left: 8px;
        font-size: 28px;
    }

    .concept-heading::after {
        right: 8px;
        font-size: 28px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 3.5rem;
        --spacing-xxl: 4.5rem;
    }

    .container {
        padding: 0 20px;
    }

    /* Header */
    .header-container {
        padding: 15px 20px;
    }

    .logo h1 {
        font-size: 15px;
        letter-spacing: 1.5px;
    }

    .logo h1::after {
        display: none;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        padding: 100px 30px;
        transition: right var(--transition-base);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.08);
    }

    .nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 30px;
        align-items: flex-start;
    }

    .nav-link {
        font-size: 15px;
        letter-spacing: 1.5px;
    }

    .hamburger {
        display: flex;
    }

    /* First View */
    .fv {
        min-height: 600px;
    }

    .fv-content {
        padding: 0 20px;
    }

    .fv-badge {
        font-size: 13px;
        letter-spacing: 2.5px;
        padding: 14px 28px;
        margin-bottom: 35px;
    }

    .fv-badge::before,
    .fv-badge::after {
        display: none;
    }

    .fv-subtitle {
        font-size: 11px;
        letter-spacing: 2.5px;
        margin-bottom: 28px;
    }

    .fv-subtitle::before,
    .fv-subtitle::after {
        margin: 0 10px;
    }

    .fv-title {
        font-size: clamp(22px, 5vw, 32px);
        margin-bottom: 25px;
        letter-spacing: 2px;
    }

    .fv-description {
        font-size: 13px;
        letter-spacing: 2.5px;
        margin-bottom: 40px;
    }

    .fv-description::before,
    .fv-description::after {
        margin: 0 10px;
    }

    .fv-tagline {
        font-size: 15px;
        letter-spacing: 1.5px;
        margin-bottom: 35px;
    }

    .btn-primary {
        padding: 14px 40px;
        font-size: 12px;
        letter-spacing: 2px;
    }

    /* Sections */
    section {
        padding: var(--spacing-xxl) 0;
    }

    .section-title {
        margin-bottom: var(--spacing-lg);
    }

    .section-title h2 {
        font-size: clamp(20px, 2.5vw, 24px);
        letter-spacing: 5px;
        padding: 0;
    }

    .section-title h2::before,
    .section-title h2::after {
        display: none;
    }

    .section-title::after {
        width: 50px;
        margin: 20px auto 0;
    }

    .section-title::before {
        display: none;
    }

    /* Concept */
    .concept-philosophy {
        padding: var(--spacing-md) var(--spacing-md);
    }

    .philosophy-title {
        font-size: 17px;
        letter-spacing: 1px;
        margin-bottom: 25px;
        padding: 0 20px;
    }

    .philosophy-title::before {
        display: none;
    }

    /* Concept */
    .concept-text {
        font-size: 16px;
        line-height: 2.0;
    }

    .concept-main {
        margin-bottom: var(--spacing-md);
        padding: 0 10px;
    }

    .concept-heading {
        font-size: 22px;
        letter-spacing: 3px;
        margin-bottom: 20px;
        padding: 0;
    }

    .concept-heading::before,
    .concept-heading::after {
        display: none;
    }

    .concept-philosophy .philosophy-text {
        font-size: 16px;
        line-height: 2.0;
        margin-bottom: 20px;
    }

    .concept-philosophy .philosophy-text br {
        display: none;
    }

    /* Philosophy Sections */
    .philosophy-text-wrapper {
        padding: var(--spacing-md) var(--spacing-md);
        border-left: none;
        border-top: 3px double var(--color-border);
    }

    .philosophy-heading {
        font-size: clamp(20px, 2.5vw, 26px);
        letter-spacing: 1.5px;
        margin-bottom: 20px;
        padding-left: 0;
    }

    .philosophy-heading::before {
        display: none;
    }

    .philosophy-heading::after {
        width: 60px;
        margin: 30px auto 0;
    }

    .philosophy-subtitle {
        font-size: 12px;
        letter-spacing: 1.5px;
        margin-bottom: var(--spacing-lg);
    }

    .philosophy-subtitle::before,
    .philosophy-subtitle::after {
        margin: 0 10px;
    }

    .philosophy-text {
        font-size: 16px;
        line-height: 2.0;
        letter-spacing: 0.5px;
        margin-bottom: 24px;
    }

    .philosophy-text br {
        display: none;
    }

    .philosophy-closing {
        font-size: 16px;
        line-height: 2.0;
        padding-top: 22px;
    }

    .philosophy-closing br {
        display: none;
    }

    /* Hide br tags in concept section on mobile */
    .concept-text br {
        display: none;
    }

    /* Profile */
    .profile-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .profile-image {
        position: static;
        max-width: 350px;
        margin: 0 auto;
        opacity: 1;
        transform: scale(1);
    }

    .profile-image.profile-revealed {
        opacity: 1;
        transform: scale(1);
    }

    .profile-info {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .profile-name {
        font-size: 22px;
        letter-spacing: 1.5px;
    }

    .profile-section:first-child .profile-certifications li {
        font-size: 15px;
        line-height: 2.1;
        padding: 6px 0 6px 12px;
    }

    .profile-highlight {
        font-size: 16px;
        padding: 30px 25px;
    }

    .profile-section p {
        font-size: 16px;
        line-height: 2.0;
        margin-bottom: 18px;
    }

    .profile-section p br {
        display: none;
    }

    .profile-closing {
        font-size: 16px;
        line-height: 2.0;
        padding-top: 18px;
    }

    .profile-closing br {
        display: none;
    }

    .profile-section {
        margin-bottom: 35px;
    }

    .profile-section h4 {
        font-size: 14px;
        margin-bottom: 18px;
    }

    /* Footer */
    .footer {
        padding: var(--spacing-lg) 0 var(--spacing-md);
    }

    .footer-content {
        flex-direction: column;
        gap: 40px;
        text-align: center;
        padding-bottom: 40px;
        margin-bottom: 35px;
    }

    .footer-content::after {
        display: none;
    }

    .footer-brand h3 {
        font-size: 15px;
        letter-spacing: 1.5px;
    }

    .footer-tagline::before,
    .footer-tagline::after {
        margin: 0 8px;
    }

    .social-link {
        width: 44px;
        height: 44px;
        font-size: 16px;
    }

    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .header-container {
        padding: 12px 16px;
    }

    .logo h1 {
        font-size: 12px;
        letter-spacing: 0.8px;
    }

    .logo h1 span {
        font-size: 8px;
        letter-spacing: 1px;
    }

    .nav {
        width: 85%;
        padding: 80px 24px;
    }

    .fv {
        min-height: 550px;
    }

    .fv-content {
        padding: 0 16px;
    }

    .fv-badge {
        font-size: 10px;
        letter-spacing: 1.5px;
        padding: 12px 20px;
        margin-bottom: 28px;
    }

    .fv-title {
        line-height: 1.7;
        letter-spacing: 1px;
    }

    .fv-subtitle {
        font-size: 9px;
        letter-spacing: 1.5px;
    }

    .fv-description {
        font-size: 11px;
        letter-spacing: 1.5px;
    }

    .fv-tagline {
        font-size: 13px;
        letter-spacing: 1px;
        margin-bottom: 30px;
    }

    .btn-primary {
        width: 100%;
        max-width: 280px;
        padding: 12px 32px;
        font-size: 11px;
        letter-spacing: 1.5px;
    }

    .section-title h2 {
        letter-spacing: 3px;
        padding: 0;
    }

    .section-subtitle {
        font-size: 11px;
        letter-spacing: 2.5px;
    }

    .social-link {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }

    /* Further optimize text for very small screens */
    .philosophy-heading {
        font-size: clamp(18px, 4.5vw, 24px);
        letter-spacing: 1px;
        margin-bottom: 18px;
        padding-left: 0;
    }

    .philosophy-subtitle {
        font-size: 11px;
        letter-spacing: 1px;
    }

    .philosophy-text {
        font-size: 15px;
        line-height: 1.95;
        letter-spacing: 0.3px;
        margin-bottom: 22px;
    }

    .philosophy-closing {
        font-size: 15px;
        line-height: 1.95;
    }

    .concept-heading {
        font-size: 19px;
        letter-spacing: 2px;
        margin-bottom: 18px;
        padding: 0;
    }

    .concept-text {
        font-size: 15px;
        line-height: 1.95;
    }

    .philosophy-title {
        font-size: 15px;
        letter-spacing: 0.5px;
        margin-bottom: 22px;
        padding: 0 10px;
    }

    .concept-philosophy .philosophy-text {
        font-size: 15px;
        line-height: 1.95;
        margin-bottom: 20px;
    }

    .concept-main {
        margin-bottom: 30px;
    }

    .profile-section p {
        font-size: 15px;
        line-height: 1.95;
        margin-bottom: 16px;
    }

    .profile-closing {
        font-size: 15px;
        line-height: 1.95;
    }

    .profile-highlight {
        font-size: 15px;
        padding: 24px 18px;
    }

    .philosophy-text-wrapper {
        padding: var(--spacing-sm) 16px;
    }

    .concept-philosophy {
        padding: var(--spacing-sm) 16px;
    }

    .profile-info {
        padding: var(--spacing-sm) 16px;
    }

    .profile-name {
        font-size: 20px;
        letter-spacing: 1px;
    }

    .profile-section:first-child .profile-certifications li {
        font-size: 14px;
        line-height: 2.0;
        padding: 5px 0 5px 10px;
    }

    .profile-name-en {
        font-size: 16px;
        letter-spacing: 2px;
    }

    .footer-tagline::before,
    .footer-tagline::after {
        margin: 0 8px;
    }
}

/* ========================================
   Utility Classes
======================================== */
.text-center {
    text-align: center;
}

.mb-large {
    margin-bottom: var(--spacing-xl);
}

.mt-large {
    margin-top: var(--spacing-xl);
}