/* ========================================
   Rhythmwalker - Layout Styles
   3-Column Responsive Layout
   Figma比率: 左17.6% | 中央64.8% | 右17.6%
   ======================================== */

/* ========================================
   Container - 3 Column Grid
   ======================================== */
.container {
    display: grid;
    grid-template-columns: 1fr 440px 1fr;
    width: 100%;
    max-width: 1920px;
    min-height: 100vh;
    margin: 0 auto;
    position: relative;
}

/* ========================================
   Left Column - Navigation (Fixed)
   ======================================== */
.left-column {
    background-color: var(--color-bg-dark);
    background-image: url('../images/PC_BG.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--color-text-light);
    position: fixed;
    top: 0;
    left: calc((100vw - min(100vw, 1920px)) / 2);
    width: calc((min(100vw, 1920px) - 440px) / 2);
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-lg);
    z-index: 10;
}

/* Navigation */
.main-nav {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-end;
    padding-right: var(--spacing-md);
}

.nav-title {
    font-family: var(--font-family-english);
    font-size: clamp(40px, 3.6vw, 70px);
    font-weight: 400;
    text-align: center;
    margin-bottom: clamp(40px, 3.7vw, 71px);
    letter-spacing: var(--letter-spacing);
}

.nav-list {
    display: flex;
    flex-direction: column;
    gap: clamp(40px, 3.7vw, 71px);
}

.nav-link {
    display: block;
    color: var(--color-text-light);
    font-family: var(--font-family-english);
    font-size: clamp(24px, 2.1vw, 40px);
    font-weight: 300;
    text-align: center;
    padding: 0;
    transition: all var(--transition-speed);
    opacity: 1;
    position: relative;
    letter-spacing: var(--letter-spacing);
    line-height: var(--line-height);
}

.nav-link:hover {
    opacity: 0.8;
}

.nav-link.active {
    opacity: 1;
    font-weight: 300;
}

.nav-link.active::before {
    content: none;
}

/* Footer Logo */
.footer-logo {
    position: absolute;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
}

.logo-small {
    width: clamp(120px, 35%, 200px);
    height: auto;
    margin: 0;
    opacity: 0.8;
}

/* ========================================
   Center Column - Main Content (Scrollable)
   ======================================== */
.center-column {
    grid-column: 2;
    background-color: var(--color-bg-dark);
    background-image: url('../images/PC_BG.png');
    background-size: cover;
    background-position: center;
    overflow-y: auto;
    overflow-x: hidden;
    height: 100vh;
    position: relative;
    /* Hide scrollbar for all browsers */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

/* Hide scrollbar for Chrome, Safari and Opera */
.center-column::-webkit-scrollbar {
    display: none;
}

/* ========================================
   Right Column - Empty Space (Fixed)
   ======================================== */
.right-column {
    background-color: var(--color-bg-dark);
    background-image: url('../images/PC_BG.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: fixed;
    top: 0;
    right: calc((100vw - min(100vw, 1920px)) / 2);
    width: calc((min(100vw, 1920px) - 440px) / 2);
    height: 100vh;
    z-index: 10;
}