/* =========================================
   BEGINNER HUB PAGE STYLES (Ultra-Responsive)
   ========================================= */

/* --- HERO SECTION (根本修正：レスポンシブ対応 & 余白解決) --- */
.beginner-hero {
    position: relative;
    width: 100%;
    /* ★修正：短めの高さを維持 */
    height: 45vh; 
    min-height: 350px;
    display: flex;
    align-items: center; /* 縦中央 */
    justify-content: center; /* 横中央 */
    overflow: hidden;
    background-color: #000;
}

/* 1. 背景画像層 */
.beginner-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: url('/assets/img/pages/beginner/hero-bg.jpg'); 
    background-size: cover;
    /* ★根本修正：画像をずらすのをやめ、トリミングの軸を「左側中央」に固定。
       画面が狭くなっても、かすみの顔（左側）が常に残るようにします。 */
    background-position: 20% center; /* 左から20%の位置を軸にする */
    background-repeat: no-repeat;
    opacity: 0.6;
    filter: blur(1px);
    z-index: 1;
}

/* 2. カラーオーバーレイ層：赤と青の対比 (復元スタイル) */
.beginner-hero::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(
        135deg,
        rgba(255, 0, 150, 0.4) 0%,   /* Magenta */
        rgba(0, 255, 255, 0.4) 100%    /* Cyan */
    );
    z-index: 2;
}

/* 3. サイバーグリッド層 (文字のコンテナ) */
.beginner-hero .container {
    position: relative;
    z-index: 3;
    text-align: center;
    background-image: linear-gradient(0deg, transparent 24%, rgba(255, 255, 255, 0.05) 25%, rgba(255, 255, 255, 0.05) 26%, transparent 27%, transparent 74%, rgba(255, 255, 255, 0.05) 75%, rgba(255, 255, 255, 0.05) 76%, transparent 77%, transparent), linear-gradient(90deg, transparent 24%, rgba(255, 255, 255, 0.05) 25%, rgba(255, 255, 255, 0.05) 26%, transparent 27%, transparent 74%, rgba(255, 255, 255, 0.05) 75%, rgba(255, 255, 255, 0.05) 76%, transparent 77%, transparent);
    background-size: 50px 50px;
    
    /* ★追加修正：画像をずらす代わりに、文字を「上側」に寄せるためのパディング。
       これで高さを短くした分を吸収しつつ、余白問題を解決します。 */
    padding: 0 60px;
    margin-top: -30px; /* 文字を少し上にずらす */
}

/* =========================================
   TYPOGRAPHY (復元・微調整)
   ========================================= */

.beginner-hero .hero-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
    margin-bottom: 8px;
}

.beginner-hero .hero-title {
    font-size: clamp(2.3rem, 7vw, 4.5rem); /* 高さに合わせて縮小 */
    font-weight: 900;
    font-family: 'Montserrat', sans-serif;
    letter-spacing: -0.02em;
    color: #fff;
    line-height: 1;
    margin-bottom: 15px;
    text-transform: uppercase;
    text-shadow:
        0 0 10px var(--neon-cyan),
        0 0 20px var(--neon-cyan),
        0 0 40px rgba(0, 255, 255, 0.5);
}

.beginner-hero .hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.05em;
    font-weight: 400;
}

/* スクロールダウンインジケーター (位置固定) */
.beginner-hero .scroll-down {
    position: absolute;
    bottom: 15px; /* 短い高さに合わせて調整 */
    left: 50%;
    transform: translateX(-50%);
    z-index: 4;
}

.scroll-line {
    width: 2px;
    height: 40px; /* 短く調整 */
    background: linear-gradient(to bottom, var(--neon-magenta), var(--neon-cyan));
    animation: scroll_down_anim 2s infinite;
}

@keyframes scroll_down_anim {
    0%   { height: 0; opacity: 0; }
    50%  { height: 40px; opacity: 1; }
    100% { height: 40px; opacity: 0; }
}

/* --- RESPONSIVE (根本修正：スマホ時の画像トリミング) --- */
@media (max-width: 768px) {
    .beginner-hero {
        height: 40vh; /* スマホではさらに短く */
        min-height: 300px;
    }

    /* ★根本修正：スマホ画面（狭い画面）では、
       画像の軸を「左側」に完全に寄せることで、顔が決して切れないようにします。 */
    .beginner-hero::before {
        background-position: left center; /* 左端を軸にする */
    }

    .beginner-hero .container {
        padding: 0 30px;
        margin-top: -20px;
    }

    .beginner-hero .hero-title {
        font-size: clamp(2rem, 9vw, 3rem);
    }
}

/* =========================================
   GATE SELECTOR
   ========================================= */
/* --- GATE SELECTOR (Final: Vivid Gradient & Line Animation) --- */
.gate-selector {
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
    padding: 0;
    /* ベースを少し持ち上げてグラデーションを馴染ませる */
    background: #050508;
    position: relative;
    overflow: hidden;
    z-index: 10;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.gate-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    min-height: 280px;
    gap: 0;
}

/* --- 箱本体：待機時からグラデーションを全開にする --- */
.gate-option {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    overflow: hidden;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* じっくり側：左から青い光 */
.gate-option.serious {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.2) 0%, rgba(0, 0, 0, 0) 70%);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

/* 最短側：右からピンクの光 */
.gate-option.dash {
    background: linear-gradient(225deg, rgba(255, 0, 150, 0.2) 0%, rgba(0, 0, 0, 0) 70%);
}

/* ホバー時にグラデーションを強める */
.gate-option.serious:hover {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.35) 0%, rgba(0, 255, 255, 0.05) 100%);
}
.gate-option.dash:hover {
    background: linear-gradient(225deg, rgba(255, 0, 150, 0.35) 0%, rgba(255, 0, 150, 0.05) 100%);
}

/* グリッド背景 */
.gate-option::before {
    content: '';
    position: absolute;
    width: 200%; height: 200%;
    top: -50%; left: -50%;
    background-image: 
        linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px);
    background-size: 40px 40px;
    transform: perspective(600px) rotateX(55deg);
    opacity: 0.2;
    transition: all 0.6s ease;
    z-index: 1;
}

.gate-content {
    position: relative;
    z-index: 5;
    text-align: center;
}

/* --- タイトルと白い下線アニメーション --- */
.gate-option h3 {
    font-size: clamp(1.6rem, 2.5vw, 2.2rem);
    font-weight: 900;
    color: #fff;
    margin-bottom: 5px;
    display: inline-block;
    position: relative;
    padding-bottom: 12px;
}

/* 下線本体：白くて光る */
.gate-option h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0; /* 最初は0 */
    height: 3px;
    background: #fff;
    box-shadow: 0 0 15px #fff, 0 0 5px #fff;
    transition: width 0.4s cubic-bezier(0.165, 0.84, 0.44, 1), left 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    transform: translateX(-50%);
}

/* ホバーで中央から伸びる */
.gate-option:hover h3::after {
    width: 100%;
}

/* ホバー時に文字自体の色もルートカラーへ */
.serious:hover h3 { color: var(--neon-cyan); text-shadow: 0 0 20px var(--neon-cyan); }
.dash:hover h3 { color: var(--neon-magenta); text-shadow: 0 0 20px var(--neon-magenta); }

.gate-content p {
    color: #fff;
    font-size: 0.95rem;
    margin-top: 15px;
    margin-bottom: 25px;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

/* ボタン：背景のグラデーションに負けないクッキリ感 */
.btn-gate {
    display: inline-block;
    padding: 12px 40px;
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    border: 2px solid;
    background: rgba(0, 0, 0, 0.6);
    transition: all 0.3s ease;
}

.serious .btn-gate { color: var(--neon-cyan); border-color: var(--neon-cyan); }
.dash .btn-gate { color: var(--neon-magenta); border-color: var(--neon-magenta); }

.gate-option:hover .btn-gate {
    background: #fff;
    color: #000 !important;
    border-color: #fff;
    box-shadow: 0 0 30px #fff;
}

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
    .gate-selector {
        width: 100%; margin-left: 0; margin-right: 0;
    }
    .gate-grid {
        grid-template-columns: 1fr;
        min-height: auto;
    }
    .gate-option {
        padding: 50px 20px;
        min-height: 220px;
    }
    .gate-option.serious {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        background: linear-gradient(180deg, rgba(0, 255, 255, 0.15) 0%, transparent 100%);
    }
    .gate-option.dash {
        background: linear-gradient(180deg, rgba(255, 0, 150, 0.15) 0%, transparent 100%);
    }
}

/* =========================================
   ROADMAP
   ========================================= */

.beginner-roadmap {
    position: relative;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    padding: 40px 0 80px;
}

/* 背景レイヤー：黒+グリッド、下にフェード */
.roadmap-bg-decor {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background-color: #000;
    -webkit-mask-image: linear-gradient(to bottom, black 0%, black 60%, transparent 100%);
    mask-image: linear-gradient(to bottom, black 0%, black 60%, transparent 100%);
}
.roadmap-bg-decor::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0,255,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,255,255,0.05) 1px, transparent 1px);
    background-size: 60px 60px;
}
.roadmap-bg-decor::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, #000 0%, transparent 12%, transparent 88%, #000 100%);
}
.roadmap-neon-left,
.roadmap-neon-right {
    position: absolute;
    top: 0;
    width: 1px;
    height: 85%;
    z-index: 2;
}
.roadmap-neon-left {
    left: 11%;
    background: linear-gradient(to bottom, transparent 0%, var(--neon-cyan) 10%, var(--neon-cyan) 60%, transparent 90%);
    box-shadow: 0 0 40px 12px var(--neon-cyan);
    filter: blur(1px);
}
.roadmap-neon-right {
    right: 11%;
    background: linear-gradient(to bottom, transparent 0%, var(--neon-magenta) 10%, var(--neon-magenta) 60%, transparent 90%);
    box-shadow: 0 0 40px 12px var(--neon-magenta);
    filter: blur(1px);
}

/* コンテンツ層 */
.roadmap-inner {
    position: relative;
    z-index: 10;
}

/* タイトル */
.roadmap-title-wrap {
    text-align: center;
    margin-bottom: 56px;
}
.roadmap-title {
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 900;
    color: #fff;
    letter-spacing: 0.45em;
    text-transform: uppercase;
    text-shadow: 0 0 15px var(--neon-cyan), 0 0 40px rgba(0,255,255,0.25);
    position: relative;
    display: inline-block;
    padding-bottom: 22px;
}
.roadmap-title::before {
    content: '';
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent 0%, rgba(255,255,255,0.6) 20%, #fff 50%, rgba(255,255,255,0.6) 80%, transparent 100%);
    box-shadow: 0 0 8px rgba(255,255,255,0.6);
}
.roadmap-title::after { content: ''; }

/* リスト */
.roadmap-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 60px;
}

/* 各STEP：hex + text を横並び、幅固定で中央配置 */
.roadmap-step {
    /* hex(280) + gap(50) + text(500) = 830px */
    width: 830px;
    margin: 0 auto;          /* ← これだけで中央配置 */
    display: flex;
    align-items: center;
    gap: 50px;
}

/* 偶数：text→hexの順（flex-directionで反転） */
.roadmap-step--rev {
    flex-direction: row-reverse;
}

/* 六角形 */
.step-hex {
    flex-shrink: 0;
}
.hex-container {
    width: 280px;
    height: 300px;
    position: relative;
    filter: drop-shadow(0 0 8px rgba(0,255,255,0.7)) drop-shadow(0 0 22px rgba(0,255,255,0.35));
    transition: filter 0.4s ease;
}
.hex-container::before {
    content: '';
    position: absolute;
    inset: -4px;
    background: linear-gradient(140deg, var(--neon-cyan) 0%, #fff 35%, var(--neon-cyan) 60%, var(--neon-magenta) 100%);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    z-index: 1;
    transition: background 0.4s ease;
}
.hex-container::after {
    content: '';
    position: absolute;
    inset: 0;
    background: #060a18;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    z-index: 2;
}
.hex-content {
    position: absolute;
    inset: 0;
    z-index: 3;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    overflow: hidden;
}
.hex-content img {
    width: 100%; height: 100%;
    object-fit: cover;
    opacity: 0.4;
    filter: grayscale(80%) brightness(0.5);
    transition: opacity 0.5s, filter 0.5s, transform 0.6s;
}
.hex-content::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(0,0,0,0.2) 3px, rgba(0,0,0,0.2) 4px);
    z-index: 5;
}
.hex-label {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 6;
}
.hex-label .step-num {
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.35em;
    color: rgba(255,255,255,0.55);
    margin-bottom: 8px;
}
.hex-label .step-title {
    display: block;
    font-size: 1.2rem;
    font-weight: 900;
    letter-spacing: 0.14em;
    color: rgba(255,255,255,0.9);
    text-transform: uppercase;
    text-shadow: 0 0 16px rgba(255,255,255,0.5);
    line-height: 1.35;
    transition: color 0.4s, text-shadow 0.4s;
}

/* ホバー */
.roadmap-step:not(.roadmap-step--rev):hover .step-text-inner,
.roadmap-step:not(.roadmap-step--rev):hover .hex-container {
    filter: drop-shadow(0 0 12px var(--neon-cyan)) drop-shadow(0 0 28px var(--neon-cyan)) drop-shadow(0 0 55px rgba(0,255,255,0.8));
}
.roadmap-step:not(.roadmap-step--rev):hover .hex-container::before {
    background: linear-gradient(140deg, #fff 0%, var(--neon-cyan) 30%, rgba(0,255,255,0.5) 100%);
}
.roadmap-step--rev:hover .step-text-inner,
.roadmap-step--rev:hover .hex-container {
    filter: drop-shadow(0 0 12px var(--neon-magenta)) drop-shadow(0 0 28px var(--neon-magenta)) drop-shadow(0 0 55px rgba(255,0,150,0.8));
}
.roadmap-step--rev:hover .hex-container::before {
    background: linear-gradient(140deg, #fff 0%, var(--neon-magenta) 30%, rgba(255,0,150,0.5) 100%);
}
.roadmap-step:not(.roadmap-step--rev):hover .hex-label .step-num  { color: var(--neon-cyan); text-shadow: 0 0 14px var(--neon-cyan); }
.roadmap-step:not(.roadmap-step--rev):hover .hex-label .step-title { color: var(--neon-cyan); text-shadow: 0 0 20px var(--neon-cyan), 0 0 40px rgba(0,255,255,0.4); }
.roadmap-step--rev:hover .hex-label .step-num  { color: var(--neon-magenta); text-shadow: 0 0 14px var(--neon-magenta); }
.roadmap-step--rev:hover .hex-label .step-title { color: var(--neon-magenta); text-shadow: 0 0 20px var(--neon-magenta), 0 0 40px rgba(255,0,150,0.4); }
.roadmap-step:hover .hex-content img {
    opacity: 0.95;
    filter: grayscale(0%) brightness(0.9);
    transform: scale(1.08);
}

/* テキストエリア：500px固定 */
.step-text {
    width: 500px;
    flex-shrink: 0;
}
.step-text-inner {
    height: 280px;
    padding: 0 36px;
    border: 1px solid rgba(255,255,255,0.18);
    background: rgba(255,255,255,0.06);
    position: relative;
    backdrop-filter: blur(2px);
    transition: border-color 0.4s, background 0.4s;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
}

/* 角アクセント（奇数：シアン） */
.roadmap-step:not(.roadmap-step--rev) .step-text-inner::before {
    content: ''; position: absolute;
    top: -2px; left: -2px; width: 18px; height: 18px;
    border-top: 2px solid var(--neon-cyan); border-left: 2px solid var(--neon-cyan);
}
.roadmap-step:not(.roadmap-step--rev) .step-text-inner::after {
    content: ''; position: absolute;
    bottom: -2px; right: -2px; width: 18px; height: 18px;
    border-bottom: 2px solid var(--neon-cyan); border-right: 2px solid var(--neon-cyan);
}
/* 角アクセント（偶数：マゼンタ） */
.roadmap-step--rev .step-text-inner::before {
    content: ''; position: absolute;
    top: -2px; right: -2px; width: 18px; height: 18px;
    border-top: 2px solid var(--neon-magenta); border-right: 2px solid var(--neon-magenta);
}
.roadmap-step--rev .step-text-inner::after {
    content: ''; position: absolute;
    bottom: -2px; left: -2px; width: 18px; height: 18px;
    border-bottom: 2px solid var(--neon-magenta); border-left: 2px solid var(--neon-magenta);
}

.roadmap-step:not(.roadmap-step--rev):hover .step-text-inner { border-color: rgba(0,255,255,0.35); background: rgba(0,255,255,0.06); }
.roadmap-step--rev:hover .step-text-inner { border-color: rgba(255,0,150,0.35); background: rgba(255,0,150,0.06); }

.step-text h3 {
    font-size: clamp(1.4rem, 2vw, 1.9rem);
    font-weight: 900;
    color: #fff;
    margin: 0;
    line-height: 1.15;
}
.step-text h3 small {
    display: block;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    color: rgba(255,255,255,0.3);
    margin-bottom: 2px;
}
.step-text h3 .h3-sub {
    display: block;
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    margin-top: 2px;
    color: rgba(255,255,255,0.4);
}
.step-text p {
    color: rgba(255,255,255,0.58);
    font-size: 0.9rem;
    line-height: 1.75;
    margin: 0;
}
.step-btn {
    display: inline-block;
    padding: 9px 32px;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    text-decoration: none;
    border: 1px solid;
    background: transparent;
    transition: all 0.3s ease;
    align-self: flex-start;
}
.roadmap-step:not(.roadmap-step--rev) .step-btn { color: var(--neon-cyan); border-color: rgba(0,255,255,0.5); }
.roadmap-step--rev .step-btn { color: var(--neon-magenta); border-color: rgba(255,0,150,0.5); }
.step-btn:hover {
    background: rgba(255,255,255,0.92);
    color: #000 !important;
    border-color: #fff;
    box-shadow: 0 0 22px rgba(255,255,255,0.35) !important;
}

.roadmap-bg-fade { display: none; }

/* 旧クラス無効化 */
.roadmap-bg-decor-bottom,
.roadmap-fade-bottom,
.roadmap-item,
.roadmap-set,
.roadmap-text,
.roadmap-text-inner { all: unset; }

/* --- レスポンシブ 768px以下 --- */
@media (max-width: 768px) {
    /* SP版：hex-containerのホバーエフェクト完全無効 */
    .roadmap-step:hover .hex-container,
    .roadmap-step:not(.roadmap-step--rev):hover .hex-container,
    .roadmap-step--rev:hover .hex-container {
        filter: drop-shadow(0 0 8px rgba(0,255,255,0.7)) drop-shadow(0 0 22px rgba(0,255,255,0.35)) !important;
        outline: none !important;
    }
    .roadmap-step:hover .hex-container::before,
    .roadmap-step:not(.roadmap-step--rev):hover .hex-container::before,
    .roadmap-step--rev:hover .hex-container::before {
        background: linear-gradient(140deg, var(--neon-cyan) 0%, #fff 35%, var(--neon-cyan) 60%, var(--neon-magenta) 100%) !important;
    }
    .roadmap-step:hover .hex-label .step-num,
    .roadmap-step:hover .hex-label .step-title {
        color: rgba(255,255,255,0.55) !important;
        text-shadow: none !important;
    }
    .roadmap-step--rev:hover .hex-label .step-num,
    .roadmap-step--rev:hover .hex-label .step-title {
        color: rgba(255,255,255,0.55) !important;
        text-shadow: none !important;
    }

    /* ネオンライン非表示 */
    .roadmap-neon-left,
    .roadmap-neon-right { display: none; }

    /* STEPを縦並びに */
    .roadmap-step,
    .roadmap-step--rev {
        width: 100%;
        max-width: 480px;
        flex-direction: column !important;
        gap: 0;
    }

    /* 六角形：書式維持・四角ボックスに */
    .step-hex {
        width: 100%;
    }
    .hex-container {
        width: 100%;
        height: 80px;
        /* clip-pathを四角に変更 */
        border-radius: 0;
    }
    .hex-container::before {
        inset: -2px;
        clip-path: none;     /* 四角のボーダーに */
        border-radius: 0;
    }
    .hex-container::after {
        clip-path: none;
        border-radius: 0;
    }
    .hex-content {
        clip-path: none;
        border-radius: 0;
    }

    /* テキストボックスと接続 */
    .step-text {
        width: 100%;
    }
    .step-text-inner {
        height: auto;
        padding: 20px 24px;
        /* 上の角アクセントを消して六角形と接続感を出す */
        border-top: none;
    }

    /* 角アクセントの上側を非表示 */
    .roadmap-step:not(.roadmap-step--rev) .step-text-inner::before,
    .roadmap-step--rev .step-text-inner::before {
        display: none;
    }
}
/* =========================================
   ADDITIONAL SUPPORT
   ========================================= */

.beginner-extra {
    padding: 80px 40px 100px;
    position: relative;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0,255,255,0.04) 0%, transparent 70%),
        radial-gradient(ellipse 60% 40% at 20% 100%, rgba(255,0,150,0.04) 0%, transparent 60%);
    border-top: 1px solid rgba(255,255,255,0.06);
}

/* ヘッダー */
.extra-header {
    text-align: center;
    margin-bottom: 56px;
}
.extra-label {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.4em;
    color: rgba(255,255,255,0.35);
    text-transform: uppercase;
    margin-bottom: 12px;
}
.extra-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 900;
    color: #fff;
    margin: 0 0 12px;
    letter-spacing: 0.05em;
}
.extra-subtitle {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.6);
    letter-spacing: 0.05em;
}

/* グリッド */
.extra-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

/* カード */
.extra-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 32px 28px;
    border: 1px solid rgba(255,255,255,0.18);
    background: rgba(255,255,255,0.07);
    backdrop-filter: blur(4px);
    text-decoration: none;
    position: relative;
    transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
    overflow: hidden;
}

/* 左上の角アクセント */
.extra-card::before {
    content: '';
    position: absolute;
    top: -1px; left: -1px;
    width: 20px; height: 20px;
    border-top: 2px solid rgba(0,255,255,0.5);
    border-left: 2px solid rgba(0,255,255,0.5);
    transition: border-color 0.3s ease;
}
/* 右下の角アクセント */
.extra-card::after {
    content: '';
    position: absolute;
    bottom: -1px; right: -1px;
    width: 20px; height: 20px;
    border-bottom: 2px solid rgba(0,255,255,0.5);
    border-right: 2px solid rgba(0,255,255,0.5);
    transition: border-color 0.3s ease;
}

.extra-card-tag {
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.3em;
    color: var(--neon-cyan);
    text-transform: uppercase;
}

.extra-card h3 {
    font-size: 1.25rem;
    font-weight: 900;
    color: #fff;
    margin: 0;
    line-height: 1.4;
    letter-spacing: 0.02em;
}

.extra-card p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
    margin: 0;
    flex: 1;
}

.extra-card-arrow {
    display: inline-block;
    padding: 9px 32px;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    border: 1px solid rgba(255,255,255,0.5);
    color: #fff;
    align-self: flex-start;
    transition: all 0.3s ease;
}

/* ホバー */
.extra-card:hover {
    border-color: rgba(0,255,255,0.25);
    background: rgba(0,255,255,0.06);
    transform: translateY(-3px);
}
.extra-card:hover::before,
.extra-card:hover::after {
    border-color: var(--neon-cyan);
}
.extra-card:hover .extra-card-arrow {
    background: rgba(255,255,255,0.92);
    color: #000;
    border-color: #fff;
    box-shadow: 0 0 22px rgba(255,255,255,0.35);
}

/* アクセントカード（NEXT: 中級への扉） */
.extra-card--accent {
    border-color: rgba(255,0,150,0.2);
    background: rgba(255,0,150,0.04);
}
.extra-card--accent::before,
.extra-card--accent::after {
    border-color: rgba(255,0,150,0.5);
}
.extra-card--accent .extra-card-tag {
    color: var(--neon-magenta);
}
.extra-card--accent:hover {
    border-color: rgba(255,0,150,0.35);
    background: rgba(255,0,150,0.08);
}
.extra-card--accent:hover::before,
.extra-card--accent:hover::after {
    border-color: var(--neon-magenta);
}
.extra-card--accent:hover .extra-card-arrow {
    background: rgba(255,255,255,0.92);
    color: #000;
    border-color: #fff;
    box-shadow: 0 0 22px rgba(255,255,255,0.35);
}

/* レスポンシブ */
@media (max-width: 768px) {
    .beginner-extra {
        padding: 60px 20px 80px;
    }
    .extra-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}
/* ===== 進行バー ===== */
.roadmap-progress { display: none; }
.rp-step { display: none; }
.rp-line { display: none; }

/* ===== ガイドノート（逆導線） ===== */
.guide-note {
    font-size: 0.75rem !important;
    color: rgba(255,255,255,0.35) !important;
    line-height: 1.5 !important;
    margin-top: 4px !important;
}

/* ===== ゲートノート（安心感テキスト） ===== */
.gate-note {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.4);
    margin-top: -16px;
    letter-spacing: 0.02em;
}

/* ===== STEPインジケーター ===== */
.step-indicator {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease, transform 0.4s ease;
}
.step-indicator.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.step-indicator-inner {
    display: flex;
    align-items: center;
    gap: 0;
    background: rgba(0, 0, 0, 0.75);
    border: 1px solid rgba(255,255,255,0.12);
    backdrop-filter: blur(12px);
    padding: 8px 20px;
}

.si-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    text-decoration: none;
    padding: 4px 12px;
    transition: all 0.3s ease;
    cursor: pointer;
}
.si-num {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.2);
    transition: color 0.3s ease, text-shadow 0.3s ease;
}
.si-label {
    font-size: 0.5rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: rgba(255,255,255,0.15);
    text-transform: uppercase;
    transition: color 0.3s ease;
    white-space: nowrap;
}

.si-line {
    width: 24px;
    height: 1px;
    background: rgba(255,255,255,0.1);
    flex-shrink: 0;
}

/* アクティブ（現在のSTEP） */
.si-step.is-active .si-num {
    color: var(--neon-cyan);
    text-shadow: 0 0 12px var(--neon-cyan), 0 0 24px rgba(0,255,255,0.4);
}
.si-step.is-active .si-label {
    color: rgba(0,255,255,0.8);
}

/* 完了済みSTEP */
.si-step.is-done .si-num {
    color: rgba(255,255,255,0.45);
}
.si-step.is-done .si-label {
    color: rgba(255,255,255,0.3);
}

/* 未到達STEP */
.si-step.is-future .si-num {
    color: rgba(255,255,255,0.15);
}
.si-step.is-future .si-label {
    color: rgba(255,255,255,0.1);
}

/* ホバー */
.si-step:hover .si-num {
    color: rgba(255,255,255,0.7);
}

/* スマホ */
@media (max-width: 768px) {
    .step-indicator {
        bottom: 16px;
        width: calc(100% - 32px);
        max-width: 400px;
    }
    .step-indicator-inner {
        padding: 6px 12px;
        justify-content: center;
    }
    .si-step {
        padding: 4px 8px;
    }
    .si-label {
        display: none;
    }
    .si-line {
        width: 16px;
    }
}