/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --bg-elevated: #3a3a3c;
    --text-primary: #ffffff;
    --text-secondary: #98989d;
    --text-tertiary: #636366;
    --accent: #0a84ff;
    --accent-hover: #0070e0;
    --success: #30d158;
    --border: #38383a;
    --shadow: rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 48px;
    max-width: 600px;
    width: 100%;
    box-shadow: 0 20px 60px var(--shadow);
    border: 1px solid var(--border);
}

.header {
    text-align: center;
    margin-bottom: 48px;
}

.logo {
    font-size: 56px;
    margin-bottom: 16px;
    opacity: 0.9;
}

.header h1 {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.header p {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Upload Area */
.upload-area {
    background: var(--bg-tertiary);
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 64px 32px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.upload-area.drag-over {
    border-color: var(--accent);
    background: rgba(10, 132, 255, 0.05);
    transform: scale(1.02);
}

.upload-icon {
    color: var(--text-secondary);
    margin-bottom: 24px;
    transition: all 0.3s;
}

.upload-area:hover .upload-icon {
    color: var(--accent);
    transform: translateY(-4px);
}

.upload-icon svg {
    width: 80px;
    height: 80px;
}

.upload-area h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.or-text {
    color: var(--text-tertiary);
    font-size: 14px;
    margin: 24px 0;
    font-weight: 500;
}

.button-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.browse-btn {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 12px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.browse-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

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

.hint {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 16px;
}

/* Password Section */
.password-section {
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid var(--border);
}

.file-selected-info {
    margin-bottom: 24px;
}

.file-selected-info > div {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
}

.file-selected-info div[style*="font-weight: 600"] {
    font-size: 15px;
    color: var(--text-primary);
}

.file-selected-info div[style*="color: #666"] {
    color: var(--text-secondary) !important;
}

.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    padding: 16px;
    background: var(--bg-elevated);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.checkbox-container:hover {
    background: rgba(58, 58, 60, 0.8);
}

.checkbox-container input[type="checkbox"] {
    margin-right: 12px;
    cursor: pointer;
    width: 20px;
    height: 20px;
    accent-color: var(--accent);
}

.checkbox-container span {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 500;
}

#passwordInput {
    margin-top: 16px;
}

#passwordInput input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 15px;
    color: var(--text-primary);
    transition: all 0.2s;
}

#passwordInput input:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-secondary);
}

#passwordInput input::placeholder {
    color: var(--text-tertiary);
}

.upload-button-container {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.upload-btn {
    flex: 1;
    background: var(--accent);
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.upload-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(10, 132, 255, 0.3);
}

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

.cancel-btn {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.cancel-btn:hover {
    background: rgba(58, 58, 60, 0.8);
    transform: translateY(-2px);
}

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

/* Progress Section */
.progress-section {
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid var(--border);
}

.file-info {
    background: var(--bg-elevated);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.file-info strong {
    color: var(--text-primary);
    font-size: 15px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-elevated);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 16px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #0070e0);
    width: 0%;
    transition: width 0.3s;
    border-radius: 4px;
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Result Section */
.result-section {
    text-align: center;
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 48px 32px;
    border: 1px solid var(--border);
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.success-icon svg {
    width: 40px;
    height: 40px;
}

.result-section h2 {
    color: var(--text-primary);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.success-message {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 15px;
}

.download-link {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.download-link input {
    flex: 1;
    padding: 14px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-primary);
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
}

.download-link input:focus {
    outline: none;
    border-color: var(--accent);
}

.copy-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
}

.copy-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

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

.upload-another {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 14px 32px;
    border-radius: 10px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 15px;
}

.upload-another:hover {
    background: rgba(58, 58, 60, 0.8);
    transform: translateY(-2px);
}

.upload-another:active {
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 32px 24px;
    }
    
    .header h1 {
        font-size: 28px;
    }
    
    .upload-area {
        padding: 48px 24px;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .browse-btn {
        width: 100%;
    }
    
    .download-link {
        flex-direction: column;
    }
    
    .copy-btn {
        width: 100%;
    }
    
    .upload-button-container {
        flex-direction: column;
    }
}