@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;700&family=Shippori+Mincho:wght@500;700&family=Zen+Kaku+Gothic+New:wght@400;500;700&display=swap');

:root {
    /* Colors */
    --c-bg: #f8fbff;
    /* ほんのり青味がかった白 */
    --c-text-main: #2c3e50;
    --c-text-sub: #546e7a;

    /* Blue Theme */
    --c-primary: #1e3799;
    /* Royal Blue */
    --c-primary-dark: #0c2461;
    /* Dark Indigo */
    --c-accent: #4a69bd;
    /* Lighter Blue */
    --c-cyan: #38ada9;
    /* Teal - for highlights */

    /* Education / Notebook */
    --c-note-line: #d1d8e0;
    --c-note-margin: #a5b1c2;
    /* 赤からグレー/青系へ変更 */

    --grad-main: linear-gradient(135deg, #1e3799 0%, #0c2461 100%);

    /* Spacing */
    --sp-xs: 4px;
    --sp-sm: 8px;
    --sp-md: 16px;
    --sp-lg: 24px;
    --sp-xl: 40px;
    --sp-xxl: 80px;

    /* Font */
    --f-sans: "Zen Kaku Gothic New", sans-serif;
    --f-serif: "Shippori Mincho", serif;
    --f-eng: "Outfit", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--f-sans);
    background-color: var(--c-bg);
    color: var(--c-text-main);
    line-height: 1.6;
    /* Grid Pattern Blueish */
    background-image:
        linear-gradient(rgba(30, 55, 153, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30, 55, 153, 0.03) 1px, transparent 1px);
    background-size: 20px 20px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s;
}

ul {
    list-style: none;
}

img,
video {
    max-width: 100%;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.u-hidden {
    display: none !important;
}

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

.section-py {
    padding: var(--sp-xxl) 0;
    position: relative;
}

/* Typography */
.heading-serif {
    font-family: var(--f-serif);
    font-weight: 700;
    color: var(--c-primary-dark);
}

.text-eng {
    font-family: var(--f-eng);
}

/* --- Decor --- */
.marker {
    background: linear-gradient(transparent 70%, rgba(56, 173, 169, 0.3) 70%);
    /* Teal highlight */
    display: inline;
    padding: 0 4px;
}

/* --- Components --- */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    border-radius: 100px;
    font-weight: 700;
    transition: all 0.3s;
    font-family: var(--f-eng);
    letter-spacing: 0.05em;
}

.btn-primary {
    background: var(--c-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(30, 55, 153, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: var(--c-primary-dark);
    box-shadow: 0 8px 25px rgba(30, 55, 153, 0.4);
}

.btn-outline {
    border: 2px solid var(--c-primary);
    color: var(--c-primary);
}

.btn-outline:hover {
    background: var(--c-primary);
    color: #fff;
}

/* Notebook Card Blue Theme */
.card-note {
    background: #fff;
    background-image: linear-gradient(#ecf0f1 1px, transparent 1px);
    background-size: 100% 24px;
    padding: 24px 24px 24px 40px;
    position: relative;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    border: 1px solid #dfe6e9;
    transition: transform 0.3s;
}

.card-note::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 24px;
    width: 2px;
    border-left: 2px solid var(--c-accent);
    /* Blue Margin */
}

.card-note:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.note-content {
    background: rgba(255, 255, 255, 0.85);
    padding: 10px;
    border-radius: 4px;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--f-eng);
    border: 1px solid currentColor;
    background: #fff;
}

.badge.open {
    color: #eb2f06;
    border-color: #eb2f06;
}

.badge.upcoming {
    color: var(--c-primary);
    border-color: var(--c-primary);
}

.badge.closed {
    color: #95a5a6;
    border-color: #95a5a6;
}


/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(248, 251, 255, 0.95);
    backdrop-filter: blur(5px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    height: 70px;
    display: flex;
    align-items: center;
}

.header-inner {
    display: flex;
    justify-content: space-between;
}

.nav-desk {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-link {
    font-weight: 700;
    font-family: var(--f-eng);
    color: var(--c-primary);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--c-cyan);
    transition: width 0.3s;
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* 画面全体にトリミングして表示 */
    z-index: -2;
    transform: scale(1.05);
    /* ブラー端対策 */
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(12, 36, 97, 0.7) 0%, rgba(30, 55, 153, 0.5) 100%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    z-index: 1;
}

.hero-surtitle {
    width: fit-content;
    font-family: var(--f-eng);
    letter-spacing: 0.2em;
    font-size: 1rem;
    display: block;
    margin: 0 auto 10px;
    opacity: 0.9;
}

.hero-title {
    font-family: var(--f-serif);
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 5rem;
    }
}

/* Section Header */
.sec-header {
    margin-bottom: 50px;
    text-align: center;
}

.sec-title-eng {
    font-family: var(--f-eng);
    font-size: 3rem;
    color: var(--c-primary-dark);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.sec-subtitle {
    color: var(--c-text-sub);
    margin-top: 5px;
}


/* Tournaments */
.tour-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

/* Timeline (Reset to original style) */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: #ccdceb;
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 40px;
    margin-bottom: 50px;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
}

.timeline-dot {
    position: absolute;
    top: 6px;
    width: 14px;
    height: 14px;
    background: var(--c-primary);
    border-radius: 50%;
    z-index: 2;
}

.timeline-item:nth-child(odd) .timeline-dot {
    right: -7px;
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -7px;
}

.timeline-date {
    font-family: var(--f-eng);
    color: var(--c-primary);
    font-weight: 700;
    margin-bottom: 5px;
}

@media (max-width: 768px) {
    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        left: 0 !important;
        text-align: left !important;
        padding-left: 50px;
    }

    .timeline-item:nth-child(odd) .timeline-dot,
    .timeline-item:nth-child(even) .timeline-dot {
        left: 13px;
        right: auto;
    }
}


/* Footer */
.footer {
    background: var(--c-primary-dark);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}
/* --- Mobile Menu --- */
.mob-menu {
    position: fixed;
    top: 0; right: -100%; /* 初期状態は右外 */
    width: 80%; max-width: 300px;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 2000;
    padding: 80px 30px;
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: -5px 0 20px rgba(0,0,0,0.1);
    display: flex; flex-direction: column; gap: 20px;
}
.mob-menu.active {
    right: 0;
}
.mob-menu .nav-link {
    font-size: 1.5rem;
    color: var(--c-primary);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    padding-bottom: 10px;
    display: block;
}
/* Overlay for mobile menu */
.mob-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1500;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s;
}
.mob-overlay.active {
    opacity: 1; pointer-events: auto;
}

/* Mobile Toggle Button Adjustment */
.mob-toggle {
    z-index: 2100; /* メニューより上 */
    position: relative;
    width: 40px; height: 40px;
    display: none; /* PC default */
    align-items: center; justify-content: center;
    font-size: 1.5rem; color: var(--c-primary);
}
@media (max-width: 768px) {
    .mob-toggle { display: flex; }
    .nav-desk { display: none; }
}


/* Mobile Header Button (Dashboard) */
.mob-header-btn {
    display: none; /* Hide on Desktop */
    padding: 6px 14px;
    border: 1px solid var(--c-primary);
    color: var(--c-primary);
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-right: 15px; /* Spacing next to hamburger */
    white-space: nowrap;
}
@media (max-width: 768px) {
    .mob-header-btn { display: inline-flex; }
    /* Align header items properly */
    .header-inner { justify-content: space-between; }
    /* Right side container for buttons */
    .header-right { display: flex; align-items: center; }
}


/* Mobile Header Actions Group */
.mob-header-actions {
    display: none;
}
@media (max-width: 768px) {
    .mob-header-actions {
        display: flex;
        align-items: center;
    }
}
/* Restore alignment */
.header-inner { align-items: center; }