:root {
    --primary-bg: #0a0e27;
    --secondary-bg: #1a1f3a;
    --accent-bg: #252b4a;
    --border-color: #2d3561;
    --primary-accent: #4a9eff;
    --success-color: #00d9a3;
    --warning-color: #ffb84d;
    --danger-color: #ff4d6a;
    --text-primary: #e8eaf0;
    --text-secondary: #a0a6c1;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-bg) 0%, #0f1429 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
}

.header-content h1 {
    font-size: 2rem;
    margin-bottom: 4px;
    color: var(--primary-accent);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.security-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-bg);
    padding: 12px 20px;
    border-radius: 8px;
    border: 1px solid var(--primary-accent);
}

.badge-icon {
    font-size: 1.5rem;
}

.badge-text {
    font-weight: 600;
    color: var(--success-color);
}

/* Status Panel */
.status-panel {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    box-shadow: var(--shadow);
}

.status-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.status-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-value {
    color: var(--primary-accent);
    font-weight: 600;
    font-size: 1.1rem;
}

/* Sections */
.upload-section,
.results-section {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

section h2 {
    margin-bottom: 20px;
    color: var(--primary-accent);
    font-size: 1.5rem;
}

/* Form Groups */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 500;
}

.file-input-wrapper {
    position: relative;
}

input[type="file"] {
    width: 100%;
    padding: 12px;
    background: var(--accent-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

input[type="file"]:hover {
    border-color: var(--primary-accent);
}

.file-info {
    margin-top: 8px;
    padding: 8px 12px;
    background: var(--accent-bg);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

input[type="password"],
input[type="text"] {
    width: 100%;
    padding: 12px 45px 12px 12px;
    background: var(--accent-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

input:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

.toggle-password {
    position: absolute;
    right: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 8px;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.toggle-password:hover {
    opacity: 1;
}

.password-strength {
    margin-top: 8px;
    height: 4px;
    background: var(--accent-bg);
    border-radius: 2px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.password-strength::after {
    content: '';
    display: block;
    height: 100%;
    width: 0%;
    transition: all 0.3s ease;
}

.password-strength.weak::after {
    width: 33%;
    background: var(--danger-color);
}

.password-strength.medium::after {
    width: 66%;
    background: var(--warning-color);
}

.password-strength.strong::after {
    width: 100%;
    background: var(--success-color);
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-reset {
    padding: 14px 28px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-accent) 0%, #3a7fd5 100%);
    color: white;
    width: 100%;
    justify-content: center;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 158, 255, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--accent-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    width: 100%;
    justify-content: center;
    margin-top: 12px;
}

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

.btn-reset {
    background: transparent;
    color: var(--danger-color);
    border: 2px solid var(--danger-color);
}

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

.btn-icon {
    font-size: 1.2rem;
}

/* Results Section */
.result-card {
    background: var(--accent-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.result-card h3 {
    margin-bottom: 16px;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.metadata-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.metadata-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

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

.metadata-value {
    color: var(--success-color);
    font-weight: 600;
}

.encrypted-output {
    width: 100%;
    min-height: 150px;
    padding: 12px;
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    resize: vertical;
}

/* Log Section */
.log-section {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.log-section h3 {
    margin-bottom: 12px;
    color: var(--primary-accent);
}

.log-container {
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    max-height: 200px;
    overflow-y: auto;
}

.log-entry {
    padding: 8px;
    margin-bottom: 4px;
    border-left: 3px solid var(--primary-accent);
    background: var(--accent-bg);
    font-size: 0.85rem;
    font-family: 'Courier New', monospace;
}

.log-entry.success {
    border-left-color: var(--success-color);
}

.log-entry.warning {
    border-left-color: var(--warning-color);
}

.log-entry.error {
    border-left-color: var(--danger-color);
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-note {
    margin-top: 8px;
    font-size: 0.8rem;
    opacity: 0.7;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--accent-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-accent);
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .status-panel {
        grid-template-columns: 1fr;
    }
    
    .metadata-grid {
        grid-template-columns: 1fr;
    }
}