/* ===========================
   グローバルスタイル
=========================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
    background-color: #0f0f1a;
    color: #e0e0f0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===========================
   ヘッダー
=========================== */
.header {
    background: linear-gradient(135deg, #1a1a3e, #2d1b69);
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid #3d3d7a;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, #7c6af7, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    margin-top: 0.5rem;
    color: #a0a0c0;
    font-size: 1rem;
}

/* ===========================
   メインコンテンツ
=========================== */
.main {
    flex: 1;
    padding: 2.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* ===========================
   アップロードエリア
=========================== */
.upload-section h2,
.status-section h2,
.download-section h2 {
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    color: #c0b8f8;
}

.upload-area {
    border: 2px dashed #4a4a8a;
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: #7c6af7;
    background: rgba(124, 106, 247, 0.05);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.upload-sub {
    color: #6060a0;
    margin: 0.5rem 0;
}

.upload-hint {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: #6060a0;
}

/* ===========================
   ファイル情報
=========================== */
.file-info {
    margin-top: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.file-info p {
    color: #a0a0c0;
    flex: 1;
    min-width: 200px;
}

/* ===========================
   プログレスバー
=========================== */
.progress-bar {
    height: 12px;
    background: #2a2a5a;
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #7c6af7, #c084fc);
    border-radius: 6px;
    transition: width 0.4s ease;
}

/* ===========================
   ボタン
=========================== */
.btn {
    display: inline-block;
    padding: 0.65rem 1.5rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: opacity 0.2s, transform 0.1s;
}

.btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, #7c6af7, #c084fc);
    color: #fff;
}

.btn-secondary {
    background: #2a2a5a;
    color: #c0b8f8;
}

/* ===========================
   フッター
=========================== */
.footer {
    background: #0a0a15;
    border-top: 1px solid #2a2a4a;
    padding: 1.25rem 0;
    text-align: center;
    color: #4a4a8a;
    font-size: 0.85rem;
}