/* ============================================================
   ronri.day — muji clean functional
   Palette: #fafaf8 #e8e8e4 #c0c0bc #3a3a3a #5a7a6a
   Fonts: Noto Sans JP (300), Noto Sans (300/500), Zen Maru Gothic (300)
   ============================================================ */

/* ---- Reset & Base ---- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    background-color: #fafaf8;
    color: #3a3a3a;
    font-family: 'Noto Sans', 'Noto Sans JP', sans-serif;
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.9;
    min-height: 100vh;
}

/* ---- Fixed Accent Line ---- */
.accent-line {
    position: fixed;
    left: calc(50% - 280px);
    top: 10vh;
    width: 1px;
    height: 80vh;
    background: #5a7a6a;
    opacity: 0.15;
    pointer-events: none;
    z-index: 0;
}

@media (max-width: 600px) {
    .accent-line {
        display: none;
    }
}

/* ---- Main Column ---- */
.column {
    max-width: 560px;
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
    z-index: 1;
}

/* ---- Hero Section ---- */
.section-hero {
    padding: 6rem 0 0 0;
    margin-bottom: 8rem;
}

.label {
    font-family: 'Zen Maru Gothic', 'Noto Sans JP', sans-serif;
    font-weight: 300;
    font-size: 0.8rem;
    color: #c0c0bc;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.site-title {
    font-family: 'Noto Sans JP', 'Noto Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: #3a3a3a;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.tagline {
    font-family: 'Noto Sans', sans-serif;
    font-weight: 300;
    font-size: 0.9rem;
    color: #c0c0bc;
    letter-spacing: 0.1em;
}

/* ---- Horizontal Rules ---- */
.rule {
    display: block;
    height: 0.5px;
    width: 40vw;
    max-width: 224px;
    margin: 0 auto;
    border: none;
    background: #c0c0bc;
    margin-bottom: 8rem;
}

/* ---- Content Sections ---- */
.section {
    margin-bottom: 8rem;
}

.section-last {
    padding-bottom: 6rem;
    margin-bottom: 0;
}

h2 {
    font-family: 'Noto Sans JP', 'Noto Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: #3a3a3a;
    margin-bottom: 2rem;
    letter-spacing: 0.02em;
    line-height: 1.3;
}

p {
    margin-bottom: 1.5rem;
    color: #3a3a3a;
}

p:last-child {
    margin-bottom: 0;
}

em {
    font-style: italic;
    font-weight: 500;
    color: #3a3a3a;
}

a {
    color: #5a7a6a;
    text-decoration: none;
    border-bottom: 0.5px solid #5a7a6a;
    transition: opacity 300ms ease-out;
}

a:hover {
    opacity: 0.65;
}

/* ---- Principles ---- */
.principle-item {
    display: flex;
    align-items: baseline;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.principle-item:last-child {
    margin-bottom: 0;
}

.principle-num {
    font-family: 'Zen Maru Gothic', 'Noto Sans JP', sans-serif;
    font-weight: 300;
    font-size: 1.1rem;
    color: #5a7a6a;
    flex-shrink: 0;
    opacity: 0.85;
}

/* ---- Blockquote ---- */
blockquote {
    border-left: 1px solid #c0c0bc;
    padding-left: 1.5rem;
    margin: 0;
}

blockquote p {
    font-weight: 300;
    font-style: italic;
    color: #3a3a3a;
    font-size: 1rem;
    line-height: 1.9;
}

/* ---- Closing ---- */
.closing {
    font-family: 'Zen Maru Gothic', 'Noto Sans JP', sans-serif;
    font-weight: 300;
    font-size: 0.85rem;
    color: #c0c0bc;
    letter-spacing: 0.12em;
    text-align: center;
}

/* ---- Footer ---- */
.site-footer {
    text-align: center;
    padding: 3rem 1.5rem 4rem;
    position: relative;
    z-index: 1;
}

.date-display {
    font-family: 'Zen Maru Gothic', 'Noto Sans JP', sans-serif;
    font-weight: 300;
    font-size: 0.8rem;
    color: #c0c0bc;
    letter-spacing: 0.15em;
    margin-bottom: 0.5rem;
}

.footer-domain {
    font-family: 'Noto Sans', sans-serif;
    font-weight: 300;
    font-size: 0.75rem;
    color: #e8e8e4;
    letter-spacing: 0.1em;
}

/* ---- Fade-in Animations ---- */
.fade-in {
    opacity: 0;
    transition: opacity 600ms ease-out;
}

.fade-in.visible {
    opacity: 1;
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
    .fade-in {
        opacity: 1;
        transition: none;
    }
}