/* =========================================
   ベース設定 & CSS変数
   ========================================= */
:root {
    --primary: #006D77;
    --primary-light: #83C5BE;
    --primary-dark: #004d55;
    --accent: #E29578;
    --bg-dark: #1a1a2e;
    --bg-light: #f8f9fa;
    --text: #333;
    --text-light: #666;
    --white: #ffffff;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', 'Poppins', sans-serif;
    color: var(--text);
    line-height: 1.8;
    overflow-x: hidden;
    background: var(--white);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* =========================================
   ヒーローセクション（メインビジュアル）
   ========================================= */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #006D77 0%, #0a4c52 50%, #1a1a2e 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(131, 197, 190, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(226, 149, 120, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 30%);
    animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(5deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 0.1em;
}

.char {
    display: inline-block;
    opacity: 0;
    transform: translateY(50px) rotateX(-90deg);
    animation: charReveal 0.8s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

.char.space {
    width: 0.3em;
}

@keyframes charReveal {
    to {
        opacity: 1;
        transform: translateY(0) rotateX(0);
    }
}

.subtitle {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    opacity: 0;
    font-weight: 300;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
}

.hero-text {
    font-size: clamp(1rem, 2vw, 1.2rem);
    opacity: 0;
    max-width: 600px;
    margin: 0 auto;
    line-height: 2;
}

.animate-fade-up {
    animation: fadeUp 1s ease forwards;
}

.delay-1 {
    animation-delay: 0.8s;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 0.9;
        transform: translateY(0);
    }
}

/* スクロールインジケーター */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 25px;
    cursor: pointer;
}

.scroll-indicator span {
    position: absolute;
    top: 10px;
    left: 50%;
    width: 6px;
    height: 6px;
    margin-left: -3px;
    background: var(--white);
    border-radius: 50%;
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% {
        transform: translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateY(20px);
        opacity: 0.3;
    }
}

/* =========================================
   ナビゲーション
   ========================================= */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 20px 0;
    z-index: 1000;
    background: transparent;
    transition: all 0.3s ease;
}

.main-nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 50px;
}

.main-nav a {
    text-decoration: none;
    color: var(--white);
    font-weight: 500;
    font-size: 1rem;
    padding: 10px 0;
    position: relative;
    transition: all 0.3s ease;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

.main-nav a:hover {
    color: var(--accent);
}

/* =========================================
   セクション共通
   ========================================= */
.section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: 60px;
    color: var(--primary);
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 3px;
}

/* =========================================
   スクロールアニメーション
   ========================================= */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-100px);
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(100px);
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    transform: scale(0.8);
    transition-delay: calc(var(--delay) * 0.15s);
}

.scale-in.visible {
    transform: scale(1);
}

/* =========================================
   背景バリエーション
   ========================================= */
.bg-light {
    background: var(--bg-light);
}

.bg-gradient {
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--white) 100%);
}

.bg-accent {
    background: linear-gradient(135deg, rgba(0, 109, 119, 0.05) 0%, rgba(131, 197, 190, 0.1) 100%);
    text-align: center;
}

/* =========================================
   About セクション
   ========================================= */
.about-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 2;
}

.profile-photo {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 30px;
    border: 4px solid var(--primary);
    box-shadow: var(--shadow);
    transition: all 0.5s ease;
}

.profile-photo:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-hover);
}

.float-animation {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* =========================================
   タイムライン
   ========================================= */
.timeline-headers {
    display: flex;
    justify-content: space-between;
    max-width: 900px;
    margin: 0 auto 40px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
}

.th-left, .th-right {
    width: 45%;
    text-align: center;
    background: linear-gradient(135deg, rgba(0, 109, 119, 0.1) 0%, rgba(131, 197, 190, 0.2) 100%);
    padding: 15px;
    border-radius: 8px;
    backdrop-filter: blur(10px);
}

.th-center {
    width: 60px;
}

.timeline-wrapper {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    background: linear-gradient(180deg, var(--primary), var(--primary-light));
    transform: translateX(-50%);
    z-index: 0;
    border-radius: 4px;
}

.timeline-row {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    margin-bottom: 50px;
    position: relative;
    z-index: 1;
}

.tl-year {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    box-shadow: 0 0 0 5px var(--white), var(--shadow);
    flex-shrink: 0;
    margin: 0 25px;
    transition: all 0.3s ease;
}

.tl-year:hover {
    transform: scale(1.1);
}

.tl-year.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 5px var(--white), 0 0 0 10px rgba(0, 109, 119, 0.2); }
    50% { box-shadow: 0 0 0 5px var(--white), 0 0 0 20px rgba(0, 109, 119, 0); }
}

.tl-content {
    width: 45%;
}

.tl-left {
    text-align: right;
}

.tl-right {
    text-align: left;
}

.tl-card {
    background: var(--white);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    position: relative;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    border: 1px solid rgba(0, 109, 119, 0.1);
}

.tl-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 12px 12px 0 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tl-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.tl-card:hover::before {
    opacity: 1;
}

.tl-card h3 {
    margin: 0 0 10px;
    color: var(--primary);
    font-size: 1.15rem;
}

.tl-card p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-light);
}

/* =========================================
   スキルカード
   ========================================= */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.skill-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    border: 1px solid rgba(0, 109, 119, 0.1);
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s ease;
}

.skill-card:hover::before {
    left: 100%;
}

.skill-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: var(--shadow-hover);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.skill-card h3 {
    color: var(--primary);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.skill-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* =========================================
   ボタン
   ========================================= */
.btn {
    display: inline-block;
    padding: 15px 40px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border: none;
    cursor: pointer;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 109, 119, 0.4);
}

.btn-glow {
    animation: glow 2s infinite;
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 109, 119, 0.3); }
    50% { box-shadow: 0 0 40px rgba(0, 109, 119, 0.5); }
}

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

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}

/* =========================================
   フッター
   ========================================= */
footer {
    background: linear-gradient(135deg, var(--bg-dark), #0f0f1a);
    color: var(--white);
    text-align: center;
    padding: 40px 0;
    margin-top: 0;
}

footer p {
    opacity: 0.7;
    font-size: 0.9rem;
}

/* =========================================
   グリッド・動画コンテナ（他ページ用）
   ========================================= */
.grid-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    padding: 20px 0;
}

.grid-container img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.4s ease;
}

.grid-container img:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-hover);
}

.video-container {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding-bottom: 20px;
    scroll-snap-type: x mandatory;
}

.video-container iframe {
    width: 300px;
    aspect-ratio: 16 / 9;
    border: none;
    border-radius: 12px;
    scroll-snap-align: start;
}

/* =========================================
   レスポンシブ対応
   ========================================= */
@media (max-width: 768px) {
    .hero-section {
        padding: 80px 20px;
    }

    .main-nav ul {
        gap: 20px;
    }

    .main-nav a {
        font-size: 0.9rem;
    }

    .section {
        padding: 60px 0;
    }

    .timeline-headers {
        display: none;
    }

    .timeline-line {
        left: 30px;
    }

    .timeline-row {
        flex-direction: column;
        padding-left: 70px;
    }

    .tl-year {
        position: absolute;
        left: 0;
        top: 0;
        margin: 0;
        width: 60px;
        height: 60px;
    }

    .tl-content {
        width: 100%;
        text-align: left;
        margin-bottom: 20px;
    }

    .tl-left .tl-card::before,
    .tl-right .tl-card::before {
        content: none;
    }

    .tl-left .tl-card::after {
        content: 'SCHOOL';
        display: block;
        font-size: 0.7rem;
        color: var(--primary);
        font-weight: 700;
        margin-bottom: 8px;
        letter-spacing: 0.1em;
    }

    .tl-right .tl-card::after {
        content: 'WORK';
        display: block;
        font-size: 0.7rem;
        color: var(--accent);
        font-weight: 700;
        margin-bottom: 8px;
        letter-spacing: 0.1em;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }

    .scroll-indicator {
        bottom: 20px;
    }
}

/* タブレット */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }

    .timeline-wrapper {
        max-width: 100%;
    }
}

/* =========================================
   カスタムスクロールバー
   ========================================= */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--primary-light));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* =========================================
   セレクションハイライト
   ========================================= */
::selection {
    background: var(--primary);
    color: var(--white);
}