:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --error-bg: #fef2f2;
    --error-text: #991b1b;
    --success-bg: #f0fdf4;
    --success-text: #166534;
    --info-bg: #eff6ff;
    --info-text: #1e40af;
}

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

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    padding: 24px;
    margin-bottom: 24px;
}

.card h2 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    border-left: 4px solid var(--primary-color);
    padding-left: 12px;
}

.input-group {
    display: flex;
    gap: 12px;
}

input[type="text"],
select,
textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
    font-size: 0.95rem;
    white-space: nowrap;
}

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

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-color);
}

.btn-outline:hover {
    background-color: var(--bg-color);
    border-color: var(--secondary-color);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: var(--danger-hover);
}

.hidden {
    display: none;
}

.error-msg {
    color: var(--error-text);
    background-color: var(--error-bg);
    padding: 8px 12px;
    border-radius: 6px;
    margin-top: 10px;
    font-size: 0.9rem;
}

.message-area {
    margin: 15px auto;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 1rem;
    max-width: 800px;
    animation: slideDown 0.3s ease;
}

.message-area.error {
    background: var(--error-bg);
    color: var(--error-text);
    border: 1px solid #fecaca;
}

.message-area.success {
    background: var(--success-bg);
    color: var(--success-text);
    border: 1px solid #bbf7d0;
}

.message-area.info {
    background: var(--info-bg);
    color: var(--info-text);
    border: 1px solid #bfdbfe;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.info-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

.player-editor-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 24px;
}

#player-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    /* 16:9 Aspect Ratio */
    background: #000;
    border-radius: 8px;
    overflow: hidden;
}

#player,
#player-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#player-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
    padding: 20px;
    background: #1e293b;
}

.current-time-display {
    margin-top: 16px;
    font-size: 1.25rem;
    font-weight: 700;
    text-align: center;
    background: var(--bg-color);
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

#display-time-text {
    color: var(--primary-color);
    font-family: monospace;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.button-group {
    display: flex;
    gap: 12px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.section-header h2 {
    margin-bottom: 0;
}

.csv-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 800px;
}

th,
td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-color);
    font-weight: 600;
    color: var(--text-secondary);
}

tr:hover {
    background-color: rgba(37, 99, 235, 0.02);
    cursor: pointer;
}

.col-no {
    width: 40px;
}

.col-time {
    width: 100px;
    font-family: monospace;
}

.col-cat {
    width: 120px;
}

.col-comment {
    min-width: 250px;
    white-space: pre-wrap;
    word-break: break-all;
}

.col-action {
    width: 80px;
    text-align: center;
}

.info-msg {
    padding: 40px;
    text-align: center;
    color: var(--text-secondary);
    background: #fff;
}

/* Responsive */
@media (max-width: 1024px) {
    .player-editor-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 12px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: 12px;
        margin-bottom: 12px;
    }

    .card h2 {
        font-size: 1.1rem;
        margin-bottom: 12px;
    }

    #player-section h2 {
        margin-bottom: 8px;
    }

    .form-group {
        margin-bottom: 8px;
    }

    .form-group label {
        margin-bottom: 3px;
        font-size: 0.8rem;
    }

    .form-row {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }

    .form-row label {
        font-size: 0.75rem;
    }

    .form-row select {
        padding: 6px 8px;
        font-size: 0.85rem;
    }

    .btn {
        padding: 8px 10px;
        font-size: 0.85rem;
    }

    .current-time-display {
        margin-top: 8px;
        padding: 6px;
        font-size: 1.05rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .csv-actions {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .csv-actions .btn {
        width: 100%;
        margin: 0;
    }

    #delete-all-btn {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .input-group {
        flex-direction: column;
    }

    .button-group {
        display: flex;
        flex-direction: row;
        gap: 8px;
    }

    .button-group .btn {
        flex: 1;
    }
}