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

:root {
    --paper-white: #fafaf8;
    --charcoal: #2c2c2c;
    --silver-gray: #8b8b8b;
    --vermillion: #c0392b;
    --warm-gray: #e8e4de;
    --nature-green: #4a7c59;
    --ink: #1a1a1a;
    --warm-paper: #f5f0e8;
}

html {
    scroll-behavior: smooth;
}

body {
    background: #fafaf8;
    color: var(--charcoal);
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 16px;
    line-height: 1.8;
    min-height: 100vh;
}

/* ===== Month Navigation Bar ===== */
#month-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #fafaf8;
    border-bottom: 1px solid var(--warm-gray);
    padding: 0.5rem 0;
}

.month-nav-inner {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
    overflow-x: auto;
    gap: 0.25rem;
}

.month-label {
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    font-size: 0.75rem;
    color: var(--silver-gray);
    cursor: pointer;
    padding: 0.25rem 0.4rem;
    border-radius: 3px;
    transition: color 0.2s, background 0.2s;
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.month-label:hover {
    color: var(--charcoal);
    background: var(--warm-paper);
}

.month-label.active {
    color: var(--ink);
    border-bottom: 2px solid var(--ink);
}

/* ===== Hero Section ===== */
#hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    border-bottom: 1px solid var(--warm-gray);
}

.hero-inner {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.hero-reiwa-year {
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 8rem);
    color: var(--ink);
    letter-spacing: 0.05em;
    line-height: 1.1;
    margin-bottom: 0.25rem;
}

.hero-japanese-date {
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
    font-size: clamp(2rem, 5vw, 5rem);
    color: var(--ink);
    letter-spacing: 0.08em;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.hero-rule {
    width: 60px;
    height: 1px;
    background: var(--warm-gray);
    border: none;
    margin: 0.5rem auto 1rem;
}

.hero-western-date {
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    font-size: clamp(1rem, 2vw, 1.5rem);
    color: var(--silver-gray);
    letter-spacing: 0.12em;
}

.hero-day-of-week {
    margin-top: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.day-stamp {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--charcoal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--charcoal);
}

.day-stamp.sunday {
    border-color: var(--vermillion);
    color: var(--vermillion);
}

.day-stamp.saturday {
    border-color: #4070aa;
    color: #4070aa;
}

/* ===== Almanac / Timeline Section ===== */
#almanac {
    padding: 3rem 0 6rem;
}

.almanac-inner {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.timeline-container {
    position: relative;
}

.timeline-line {
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--warm-gray);
    transform: translateX(-50%);
}

.timeline-entries {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* ===== Entry Item ===== */
.entry-item {
    display: grid;
    grid-template-columns: 40px 1fr;
    gap: 0.75rem;
    margin-bottom: 1rem;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.entry-item.visible {
    opacity: 1;
}

.entry-item.today .entry-card {
    border-left: 3px solid var(--vermillion);
}

/* Timeline Marker Column */
.entry-marker-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 0.25rem;
    gap: 0.4rem;
    position: relative;
    z-index: 1;
}

.entry-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--warm-gray);
    border: 2px solid var(--charcoal);
    flex-shrink: 0;
    margin-top: 0.3rem;
}

.entry-dot.today-dot {
    background: var(--vermillion);
    border-color: var(--vermillion);
}

.entry-dot.holiday-dot {
    background: var(--vermillion);
    border-color: var(--vermillion);
}

.entry-weekday-stamp {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1.5px solid var(--charcoal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--charcoal);
    flex-shrink: 0;
}

.entry-weekday-stamp.sunday-stamp {
    border-color: var(--vermillion);
    color: var(--vermillion);
}

.entry-weekday-stamp.saturday-stamp {
    border-color: #4070aa;
    color: #4070aa;
}

/* Entry Card */
.entry-card {
    background: var(--warm-paper);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 0;
}

.entry-header {
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
    margin-bottom: 0.35rem;
    flex-wrap: wrap;
}

.entry-date-label {
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    font-size: 0.78rem;
    color: var(--silver-gray);
    letter-spacing: 0.06em;
}

.entry-title {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.season-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.season-dot.spring { background: #d4a5a5; }
.season-dot.summer { background: var(--nature-green); }
.season-dot.autumn { background: #c8922a; }
.season-dot.winter { background: #7baac7; }

.entry-body {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 400;
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--charcoal);
}

.entry-tag {
    display: inline-block;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.68rem;
    font-weight: 500;
    color: var(--silver-gray);
    border: 1px solid var(--warm-gray);
    border-radius: 3px;
    padding: 0.1rem 0.4rem;
    margin-top: 0.5rem;
    letter-spacing: 0.04em;
}

.entry-tag.holiday-tag {
    color: var(--vermillion);
    border-color: var(--vermillion);
}

.entry-tag.solar-tag {
    color: var(--nature-green);
    border-color: var(--nature-green);
}

.entry-tag.reiwa-tag {
    color: var(--charcoal);
    border-color: var(--charcoal);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}

::-webkit-scrollbar-track {
    background: var(--paper-white);
}

::-webkit-scrollbar-thumb {
    background: var(--warm-gray);
    border-radius: 2px;
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .hero-reiwa-year {
        font-size: clamp(2.5rem, 10vw, 5rem);
    }

    .hero-japanese-date {
        font-size: clamp(1.8rem, 8vw, 3.5rem);
    }

    .almanac-inner {
        padding: 0 1rem;
    }

    .entry-card {
        padding: 0.75rem 1rem;
    }
}