/* ==========================================
   共通スタイル
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Yu Gothic', 'YuGothic', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 2rem;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* ==========================================
   ヘッダーセクション
   ========================================== */
.header-section {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    text-align: center;
}

.header-section h1 {
    color: #333;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.description {
    color: #666;
    font-size: 1rem;
}

/* ==========================================
   アップロードセクション
   ========================================== */
.upload-section {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.upload-area {
    border: 3px dashed #cbd5e0;
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f7fafc;
}

.upload-area:hover {
    border-color: #667eea;
    background: #edf2f7;
}

.upload-area.dragover {
    border-color: #667eea;
    background: #e6f2ff;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.upload-area p {
    color: #4a5568;
    font-size: 1.1rem;
    margin: 0.5rem 0;
}

.upload-or {
    color: #a0aec0;
    font-size: 0.9rem;
    margin: 1rem 0;
}

.select-file-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.select-file-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.file-status {
    margin-top: 1.5rem;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: #f7fafc;
    border-radius: 8px;
    border: 2px solid #e2e8f0;
}

.file-item.valid {
    border-color: #48bb78;
    background: #f0fff4;
}

.status-ok {
    color: #48bb78;
    font-weight: 600;
}

/* ==========================================
   アクションボタン
   ========================================== */
.actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(72, 187, 120, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(72, 187, 120, 0.4);
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.btn-secondary:hover {
    background: #cbd5e0;
}

/* ==========================================
   メッセージエリア
   ========================================== */
.message-area {
    margin-bottom: 2rem;
}

.message {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.message.success {
    background: #f0fff4;
    color: #276749;
    border-left: 4px solid #48bb78;
}

.message.error {
    background: #fff5f5;
    color: #742a2a;
    border-left: 4px solid #f56565;
}

.message.info {
    background: #ebf8ff;
    color: #2c5282;
    border-left: 4px solid #4299e1;
}

/* ==========================================
   カードコンテナ（画面表示用）
   ========================================== */
.cards-container {
    margin-top: 2rem;
}

.page {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: 0.8rem;
}

/* ==========================================
   カードスタイル（A4横・16分割・プレミアムデザイン）
   ========================================== */
.card {
    position: relative;
    aspect-ratio: 1.6;
    border-radius: 8px;
    overflow: hidden;
    background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
    box-shadow:
        0 8px 24px rgba(0, 0, 0, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.1),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
}

.card.empty {
    background: transparent;
    box-shadow: none;
}

.card-inner {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 0.9rem;
    position: relative;
}

/* カードヘッダー */
.card-header {
    position: relative;
    margin-bottom: 0.6rem;
    padding-bottom: 0.5rem;
}

.card-header::before {
    content: '';
    position: absolute;
    top: -0.3rem;
    left: 0;
    width: 35%;
    height: 2px;
    background: linear-gradient(90deg, #ffd700, #ffed4e, transparent);
    box-shadow: 0 0 8px rgba(255, 215, 0, 0.4);
}

.card-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2) 20%,
        rgba(255, 255, 255, 0.2) 80%,
        transparent
    );
}

.card-title {
    color: #fff;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    line-height: 1.3;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    word-break: break-all;
}

/* カードボディ */
.card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

.keep-label {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.3rem;
}

.keep-value {
    color: #ffd700;
    font-size: 2rem;
    font-weight: 900;
    line-height: 1;
    text-shadow:
        0 0 15px rgba(255, 215, 0, 0.5),
        0 3px 6px rgba(0, 0, 0, 0.4);
    letter-spacing: 0.02em;
}

.unit {
    font-size: 1.1rem;
    font-weight: 700;
    margin-left: 0.2rem;
    color: rgba(255, 215, 0, 0.9);
}

/* カードフッター */
.card-footer {
    position: relative;
    padding-top: 0.5rem;
}

.decoration-line {
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 215, 0, 0.25) 30%,
        rgba(255, 215, 0, 0.25) 70%,
        transparent
    );
}

/* プレミアム装飾 */
.card::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.card::after {
    content: '';
    position: absolute;
    bottom: -15%;
    left: -8%;
    width: 80px;
    height: 80px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
    border-radius: 50%;
}

/* 右上の装飾アクセント */
.card-inner::before {
    content: '';
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 20px;
    height: 20px;
    border-top: 2px solid rgba(255, 215, 0, 0.3);
    border-right: 2px solid rgba(255, 215, 0, 0.3);
    border-radius: 0 4px 0 0;
}

/* 左下の装飾アクセント */
.card-inner::after {
    content: '';
    position: absolute;
    bottom: 0.5rem;
    left: 0.5rem;
    width: 16px;
    height: 16px;
    border-bottom: 2px solid rgba(255, 215, 0, 0.2);
    border-left: 2px solid rgba(255, 215, 0, 0.2);
    border-radius: 0 0 0 4px;
}

/* ==========================================
   印刷用スタイル（A4横向き・4×4グリッド）
   ========================================== */
@media print {
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        color-adjust: exact !important;
    }

    body {
        background: white;
        padding: 0;
        margin: 0;
    }

    .no-print {
        display: none !important;
    }

    .container {
        max-width: none;
        margin: 0;
        padding: 0;
    }

    .cards-container {
        margin: 0;
    }

    .page {
        width: 297mm;  /* A4横 */
        height: 210mm; /* A4横 */
        padding: 6mm;
        margin: 0;
        page-break-after: always;
        box-shadow: none;
        border-radius: 0;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        grid-template-rows: repeat(4, 1fr);
        gap: 6mm;
        background: white;
    }

    .page:last-child {
        page-break-after: auto;
    }

    .card {
        width: 100%;
        height: 100%;
        aspect-ratio: auto;
        border-radius: 6px;
        page-break-inside: avoid;
        box-shadow:
            0 4px 12px rgba(0, 0, 0, 0.2),
            inset 0 1px 0 rgba(255, 255, 255, 0.1),
            inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    }

    .card.empty {
        display: none;
    }

    .card-inner {
        padding: 0.7rem;
    }

    .card-header {
        margin-bottom: 0.5rem;
        padding-bottom: 0.4rem;
    }

    .card-header::before {
        height: 2px;
    }

    .card-title {
        font-size: 0.8rem;
    }

    .keep-label {
        font-size: 0.55rem;
    }

    .keep-value {
        font-size: 1.7rem;
    }

    .unit {
        font-size: 0.95rem;
    }

    .card-inner::before {
        width: 16px;
        height: 16px;
    }

    .card-inner::after {
        width: 14px;
        height: 14px;
    }
}

/* A4横向き設定 */
@page {
    size: A4 landscape;
    margin: 0;
}