/* ========================================
   XAPK to APK Web Converter - Styles
   现代深色主题设计
   ======================================== */

:root {
    /* 主色调 - 赛博朋克风格 */
    --color-bg-deep: #0a0a0f;
    --color-bg-main: #12121a;
    --color-bg-card: #1a1a24;
    --color-bg-elevated: #222230;
    
    /* 强调色 - 霓虹风格 */
    --color-primary: #00f5d4;
    --color-primary-dim: rgba(0, 245, 212, 0.15);
    --color-primary-glow: rgba(0, 245, 212, 0.4);
    --color-secondary: #ff6b9d;
    --color-accent: #9d4edd;
    --color-warning: #ffd166;
    --color-success: #06d6a0;
    --color-error: #ef476f;
    
    /* 文字颜色 */
    --color-text-primary: #f0f0f5;
    --color-text-secondary: #a0a0b0;
    --color-text-muted: #606070;
    
    /* 边框和阴影 */
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 245, 212, 0.3);
    --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(0, 245, 212, 0.15);
    
    /* 字体 */
    --font-display: 'JetBrains Mono', 'Menlo', monospace;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 基础重置 ========== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg-deep);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ========== 动态背景 ========== */
.bg-pattern {
    position: fixed;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(157, 78, 221, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 245, 212, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 107, 157, 0.05) 0%, transparent 40%);
    pointer-events: none;
    z-index: -2;
}

.bg-gradient {
    position: fixed;
    inset: 0;
    background: 
        linear-gradient(180deg, transparent 0%, var(--color-bg-deep) 100%);
    pointer-events: none;
    z-index: -1;
}

/* ========== 容器 ========== */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 40px 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========== 头部 ========== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--color-primary-dim), rgba(157, 78, 221, 0.15));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    border: 1px solid var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.logo-icon svg {
    width: 28px;
    height: 28px;
}

.logo-text h1 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

.logo-text h1 .accent {
    color: var(--color-primary);
    text-shadow: 0 0 20px var(--color-primary-glow);
}

.tagline {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.config-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    background: var(--color-bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.config-link:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: 0 0 20px var(--color-primary-glow);
}

.quota-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--color-bg-card);
    border: 1px solid var(--border-color);
    padding: 10px 18px;
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.quota-icon {
    font-size: 1.1rem;
}

.quota-badge strong {
    color: var(--color-primary);
    font-family: var(--font-display);
}

/* ========== 主内容区 ========== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* ========== 上传区域 ========== */
.upload-section {
    width: 100%;
}

.drop-zone {
    position: relative;
    background: var(--color-bg-card);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-xl);
    padding: 64px 32px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.drop-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary-dim), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--color-primary);
    background: var(--color-bg-elevated);
    box-shadow: var(--shadow-glow);
}

.drop-zone:hover::before,
.drop-zone.dragover::before {
    opacity: 1;
}

.drop-zone-content {
    position: relative;
    z-index: 1;
}

.upload-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    color: var(--color-text-muted);
    transition: all var(--transition-normal);
}

.drop-zone:hover .upload-icon,
.drop-zone.dragover .upload-icon {
    color: var(--color-primary);
    transform: translateY(-8px);
}

.upload-icon svg {
    width: 100%;
    height: 100%;
}

.drop-zone h2 {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.drop-zone p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.file-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* ========== 文件列表区域 ========== */
.files-section {
    background: var(--color-bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--color-bg-elevated);
}

.section-header h3 {
    font-size: 1.1rem;
    font-weight: 500;
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* 签名版本选择器 */
.signature-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.signature-selector:hover {
    border-color: var(--border-glow);
    background: var(--color-bg-elevated);
}

.signature-selector label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
    margin: 0;
}

.signature-select {
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    outline: none;
}

.signature-select:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-card);
}

.signature-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-dim);
}

.signature-select option {
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
}

/* ========== 按钮样式 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #00c4a7);
    color: var(--color-bg-deep);
    box-shadow: 0 4px 20px rgba(0, 245, 212, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(0, 245, 212, 0.4);
}

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-outline {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-text-muted);
    color: var(--color-text-primary);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

/* ========== 文件列表项 ========== */
.file-list {
    max-height: 400px;
    overflow-y: auto;
}

.file-list::-webkit-scrollbar {
    width: 6px;
}

.file-list::-webkit-scrollbar-track {
    background: var(--color-bg-card);
}

.file-list::-webkit-scrollbar-thumb {
    background: var(--color-text-muted);
    border-radius: 3px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

.file-item:last-child {
    border-bottom: none;
}

.file-item:hover {
    background: rgba(255, 255, 255, 0.02);
}

.file-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.file-details {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.file-meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.file-progress {
    width: 100%;
    height: 4px;
    background: var(--color-bg-elevated);
    border-radius: 2px;
    margin-top: 8px;
    overflow: hidden;
    display: none;
}

.file-progress.active {
    display: block;
}

.file-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 2px;
    width: 0%;
    transition: width 0.3s ease;
}

.file-status {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.status-badge {
    padding: 4px 12px;
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 500;
}

.status-pending {
    background: rgba(160, 160, 176, 0.15);
    color: var(--color-text-secondary);
}

.status-converting {
    background: rgba(0, 245, 212, 0.15);
    color: var(--color-primary);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.status-success {
    background: rgba(6, 214, 160, 0.15);
    color: var(--color-success);
}

.status-error {
    background: rgba(239, 71, 111, 0.15);
    color: var(--color-error);
}

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

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    background: var(--color-bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background: var(--color-bg-card);
    color: var(--color-text-primary);
    border-color: var(--color-text-muted);
}

.btn-icon.btn-download {
    color: var(--color-success);
}

.btn-icon.btn-download:hover {
    background: rgba(6, 214, 160, 0.15);
    border-color: var(--color-success);
}

.btn-icon.btn-remove {
    color: var(--color-error);
}

.btn-icon.btn-remove:hover {
    background: rgba(239, 71, 111, 0.15);
    border-color: var(--color-error);
}

/* ========== 功能说明卡片 ========== */
.features-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card h4 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* ========== 页脚 ========== */
.footer {
    margin-top: auto;
    padding-top: 40px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.footer a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--color-text-primary);
    text-decoration: underline;
}

.disclaimer {
    margin-top: 8px;
    font-size: 0.75rem;
    opacity: 0.7;
}

.version {
    margin-top: 12px;
    font-family: var(--font-display);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    opacity: 0.5;
}

/* ========== Toast 通知 ========== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--color-bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 280px;
    max-width: 400px;
    box-shadow: var(--shadow-soft);
    animation: toastSlide 0.3s ease;
}

@keyframes toastSlide {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.toast-exit {
    animation: toastExit 0.3s ease forwards;
}

@keyframes toastExit {
    to {
        opacity: 0;
        transform: translateX(100px);
    }
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 500;
    margin-bottom: 2px;
}

.toast-message {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.toast-success { border-left: 3px solid var(--color-success); }
.toast-error { border-left: 3px solid var(--color-error); }
.toast-warning { border-left: 3px solid var(--color-warning); }
.toast-info { border-left: 3px solid var(--color-primary); }

/* ========== 加载遮罩 ========== */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.loading-content {
    text-align: center;
}

.loading-spinner {
    width: 56px;
    height: 56px;
    border: 3px solid var(--color-bg-elevated);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-content p {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .container {
        padding: 24px 16px;
    }
    
    .header {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }
    
    .quota-badge {
        align-self: stretch;
        justify-content: center;
    }
    
    .drop-zone {
        padding: 48px 20px;
    }
    
    .section-header {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }
    
    .header-actions {
        flex-direction: column;
        justify-content: stretch;
    }
    
    .signature-selector {
        width: 100%;
        justify-content: space-between;
    }
    
    .header-actions .btn {
        flex: 1;
    }
    
    .file-item {
        flex-wrap: wrap;
    }
    
    .file-status {
        order: 3;
        width: 100%;
        justify-content: flex-end;
        margin-top: 8px;
    }
    
    .features-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .logo-text h1 {
        font-size: 1.4rem;
    }
    
    .drop-zone h2 {
        font-size: 1.2rem;
    }
    
    .file-info {
        flex-direction: column;
    }
}