/* Common Styles */

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Section Title */
.section-title {
    text-align: center;
    margin-bottom: 6rem;
}

.section-title__en {
    display: block;
    font-family: var(--font-family-en);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.section-title__jp {
    display: block;
    font-family: var(--font-family-heading);
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--color-text-dark);
}

@media (max-width: 640px) {
    .section-title {
        margin-bottom: 4rem;
    }
    
    .section-title__jp {
        font-size: 2.4rem;
    }
}

/* Buttons */
.btn-primary {
    display: inline-block;
    background-color: var(--color-primary);
    color: var(--color-bg-white);
    padding: 1.5rem 4rem;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
}

.btn-primary--large {
    padding: 2rem 6rem;
    font-size: 1.8rem;
}

.btn-secondary {
    display: inline-block;
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 1.5rem 4rem;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    transition: var(--transition-base);
}

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

.btn-secondary--large {
    padding: 2rem 6rem;
    font-size: 1.8rem;
}

.btn-more {
    display: inline-block;
    color: var(--color-primary);
    font-size: 1.6rem;
    font-weight: 700;
    position: relative;
    padding-right: 3rem;
    transition: var(--transition-base);
}

.btn-more::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 2px;
    background-color: currentColor;
    transition: var(--transition-base);
}

.btn-more::before {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 10px;
    height: 10px;
    border-top: 2px solid currentColor;
    border-right: 2px solid currentColor;
}

.btn-more:hover {
    padding-right: 4rem;
}

.btn-arrow {
    display: inline-block;
    color: var(--color-primary);
    font-size: 1.6rem;
    font-weight: 700;
    position: relative;
    padding-bottom: 0.5rem;
    transition: var(--transition-base);
}

.btn-arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.btn-arrow:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-base);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2rem 4rem;
}

.header__logo img {
    height: 40px;
}

.header__nav__list {
    display: flex;
    gap: 4rem;
}

.header__nav__item a {
    font-size: 1.6rem;
    font-weight: 500;
    color: var(--color-text-dark);
    transition: var(--transition-base);
    position: relative;
}

.header__nav__item a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.header__nav__item a:hover::after {
    width: 100%;
}

.header__hamburger {
    display: none;
    width: 30px;
    height: 30px;
    position: relative;
}

.header__hamburger span {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-dark);
    transition: var(--transition-base);
}

.header__hamburger span:nth-child(1) {
    top: 0;
}

.header__hamburger span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.header__hamburger span:nth-child(3) {
    bottom: 0;
}

@media (max-width: 1024px) {
    .header__nav {
        display: none;
    }
    
    .header__hamburger {
        display: block;
    }
}

/* Fixed Side CV Buttons */
.cv-side {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 900;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.cv-side__item {
    background-color: var(--color-primary);
    color: var(--color-bg-white);
    padding: 2rem 1.5rem;
    writing-mode: vertical-rl;
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    transition: var(--transition-base);
}

.cv-side__item:hover {
    background-color: var(--color-accent);
    padding-right: 2rem;
}

.cv-side__item--contact {
    background-color: var(--color-accent);
}

.cv-side__item--contact:hover {
    background-color: var(--color-secondary);
}

@media (max-width: 640px) {
    .cv-side {
        bottom: 0;
        top: auto;
        right: 0;
        left: 0;
        transform: none;
        flex-direction: row;
        gap: 0;
    }
    
    .cv-side__item {
        writing-mode: horizontal-tb;
        padding: 1.5rem;
        flex: 1;
        text-align: center;
    }
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: var(--color-bg-white);
    padding: 8rem 0 2rem;
    margin-top: 12rem;
}

.footer__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer__content {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 6rem;
    margin-bottom: 6rem;
}

.footer__logo {
    margin-bottom: 2rem;
}

.footer__logo img {
    height: 50px;
}

.footer__company__name {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer__company__address {
    font-style: normal;
    line-height: 1.8;
    opacity: 0.8;
}

.footer__nav__list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.footer__nav__list a {
    opacity: 0.8;
    transition: var(--transition-base);
}

.footer__nav__list a:hover {
    opacity: 1;
}

.footer__sns__title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.footer__sns__links {
    display: flex;
    gap: 1.5rem;
}

.footer__sns__links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transition: var(--transition-base);
}

.footer__sns__links a:hover {
    border-color: var(--color-bg-white);
    transform: translateY(-2px);
}

.footer__bottom {
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.footer__copy {
    font-size: 1.4rem;
    opacity: 0.6;
}

@media (max-width: 768px) {
    .footer {
        padding: 6rem 0 2rem;
        margin-top: 8rem;
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .footer__nav__list {
        grid-template-columns: 1fr;
    }
}