/* ========================================
   LEDテープライト リペアキット使用方法ページ
   必要最小限のスタイル
======================================== */

/* 基本リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: #ffffff;
    background: #0a0a0a;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ヘッダー */
.header {
    position: sticky;
    top: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 40px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo {
    display: block;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.8;
}

.logo img {
    height: 50px;
    width: auto;
}

/* メインセクション */
.section {
    flex: 1;
    padding: 60px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

/* 動画グリッド */
.video-grid {
    display: flex;
    justify-content: center;
    width: 100%;
}

.video-wrapper {
    width: 100%;
    max-width: 900px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(185, 237, 40, 0.2);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.video-wrapper:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(185, 237, 40, 0.15);
    border-color: rgba(185, 237, 40, 0.4);
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 */
    background: #000;
}

.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.video-title {
    padding: 25px;
    font-size: 1.3rem;
    font-weight: 600;
    color: #ffffff;
    text-align: center;
    background: rgba(255, 255, 255, 0.02);
}

/* フッター */
.footer {
    padding: 40px 20px;
    background: #c1cedb;
    text-align: center;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.company-logo {
    display: inline-block;
    transition: opacity 0.3s ease;
}

.company-logo:hover {
    opacity: 0.8;
}

.company-logo img {
    width: 125px;
    height: 75px;
    object-fit: contain;
}

.footer-text {
    color: #000000;
    font-size: 0.9rem;
}

/* ========================================
   レスポンシブ対応
======================================== */

/* タブレット（768px以下） */
@media screen and (max-width: 768px) {
    .header-content {
        padding: 15px 25px;
    }

    .logo img {
        height: 40px;
    }

    .section {
        padding: 40px 15px;
    }

    .video-wrapper {
        border-radius: 15px;
    }

    .video-title {
        padding: 20px;
        font-size: 1.1rem;
    }

    .footer {
        padding: 30px 15px;
    }

    .company-logo img {
        width: 100px;
        height: 60px;
    }

    .footer-text {
        font-size: 0.85rem;
    }
}

/* スマートフォン（480px以下） */
@media screen and (max-width: 480px) {
    .header-content {
        padding: 12px 15px;
    }

    .logo img {
        height: 35px;
    }

    .section {
        padding: 30px 12px;
    }

    .video-wrapper {
        border-radius: 12px;
    }

    .video-title {
        padding: 15px 12px;
        font-size: 1rem;
    }

    .footer {
        padding: 25px 12px;
    }

    .company-logo img {
        width: 90px;
        height: 54px;
    }

    .footer-text {
        font-size: 0.8rem;
        line-height: 1.5;
    }
}

/* 小型スマートフォン（360px以下） */
@media screen and (max-width: 360px) {
    .logo img {
        height: 30px;
    }

    .section {
        padding: 25px 10px;
    }

    .video-wrapper {
        border-radius: 10px;
    }

    .video-title {
        padding: 12px 10px;
        font-size: 0.95rem;
    }

    .company-logo img {
        width: 80px;
        height: 48px;
    }

    .footer-text {
        font-size: 0.75rem;
    }
}

/* ========================================
   タッチデバイス用最適化
======================================== */
@media (hover: none) and (pointer: coarse) {
    .video-wrapper:hover {
        transform: none;
        box-shadow: none;
    }

    .logo:hover,
    .company-logo:hover {
        opacity: 1;
    }
}

/* ========================================
   ビデオコントロールの最適化
======================================== */
video::-webkit-media-controls-panel {
    background-color: rgba(0, 0, 0, 0.8);
}

/* ========================================
   アクセシビリティ
======================================== */
a:focus-visible,
video:focus-visible {
    outline: 3px solid #b9ed28;
    outline-offset: 2px;
}

/* アニメーション軽減 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}