:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --accent: #06b6d4;
    --accent-light: #67e8f9;
    --accent-dark: #0891b2;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border: #475569;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a202c 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

/* Lock Screen Styles */
.lock-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
    text-align: center;
}

.lock-screen .logo {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

.lock-screen .subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.lock-form {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    width: 100%;
    max-width: 400px;
}

.lock-form input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
    margin-bottom: 1rem;
}

.lock-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.1);
}

.button-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    outline: none;
    text-decoration: none;
    white-space: nowrap;
    flex: 1;
    min-width: fit-content;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.error-msg {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    text-align: center;
}

/* Main App Styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 1024px) {
    .main-grid {
        grid-template-columns: 400px 1fr;
    }
}

.card {
    background: var(--bg-card);
    border-radius: 1rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem 1.5rem 0 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.card-content {
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.input-group {
    display: flex;
    gap: 0.5rem;
    align-items: end;
}

.slider-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.slider {
    flex: 1;
    height: 6px;
    appearance: none;
    background: var(--bg-input);
    border-radius: 3px;
    outline: none;
    position: relative;
}

.slider::-webkit-slider-track {
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
}

.slider::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.slider-value {
    font-weight: 600;
    color: var(--primary);
}

.slider-input {
    width: 60px;
    text-align: center;
}

.toggle-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-input);
    transition: var(--transition);
    border-radius: 24px;
    border: 1px solid var(--border);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    top: 3px;
    background-color: var(--text-primary);
    transition: var(--transition);
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: var(--primary);
    border-color: var(--primary);
}

input:checked + .toggle-slider:before {
    transform: translateX(24px);
    background-color: white;
}

.password-output {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 0.5rem;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-size: 1rem;
    min-height: 60px;
    resize: none;
    transition: var(--transition);
}

.password-output.highlight {
    border-color: var(--success);
    box-shadow: 0 0 0 3px rgb(16 185 129 / 0.1);
}

.strength-meter {
    margin-bottom: 1.5rem;
}

.strength-value {
    font-weight: 600;
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.strength-bar {
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.strength-fill {
    height: 100%;
    width: 0;
    transition: var(--transition);
    border-radius: 3px;
}

.strength-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Gamified Strength Meter Classes */
.strength-baby { color: #ef4444; }
.strength-weak { color: #f97316; }
.strength-medium { color: #eab308; }
.strength-strong { color: #22c55e; }
.strength-fortress { color: #10b981; }
.strength-elite {
    color: #06b6d4;
    text-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.vault-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.search-input {
    flex: 1;
}

.vault-list {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--bg-input);
}

.vault-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
}

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

.vault-item:hover {
    background: rgba(99, 102, 241, 0.1);
}

.vault-site {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.vault-username {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.vault-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 0.25rem;
}

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--success);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.hidden {
    display: none;
}

/* Dropdown Styles */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: 1000;
    margin-top: 0.25rem;
    overflow: hidden;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

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

.dropdown-item:hover {
    background: var(--bg-input);
    color: var(--primary-light);
}

.dropdown-item i {
    width: 16px;
    text-align: center;
    color: var(--accent);
}

@media (max-width: 640px) {
    .container {
        padding: 1rem;
    }

    .header-actions {
        flex-direction: column;
    }

    .button-group {
        flex-direction: column;
    }

    .vault-controls {
        flex-direction: column;
    }
}