:root {
    --primary: #6366F1;
    --primary-hover: #4F46E5;
    --secondary: #94A3B8;
    --accent: #22D3EE;
    --bg-dark: #0F172A;
    --bg-panel: rgba(30, 41, 59, 0.6);
    --border-color: rgba(148, 163, 184, 0.15);
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;

    --danger: #EF4444;
    --warning: #F59E0B;
    --success: #10B981;

    --radius: 12px;
    --transition: all 0.25s ease;
}

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

body {
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(34, 211, 238, 0.05) 0%, transparent 40%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 1rem;
}

.app-container {
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary);
}

.brand h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--secondary);
    font-size: 0.875rem;
}

.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

#password-input {
    width: 100%;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem 3rem 1rem 1rem;
    color: var(--text-main);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    transition: var(--transition);
}

#password-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.icon-btn {
    position: absolute;
    right: 1rem;
    background: none;
    border: none;
    color: var(--secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.icon-btn:hover {
    color: var(--text-main);
}

.strength-meter {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.meter-bar-container {
    width: 100%;
    height: 8px;
    background: rgba(15, 23, 42, 0.8);
    border-radius: 4px;
    overflow: hidden;
}

.meter-bar {
    height: 100%;
    width: 0%;
    background: var(--danger);
    border-radius: 4px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.meter-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    font-weight: 600;
}

.strength-text {
    color: var(--danger);
}

.entropy-value {
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
}

.ttc-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: rgba(15, 23, 42, 0.5);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.ttc-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.ttc-value {
    font-weight: 700;
    color: var(--text-main);
}

.details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 600px) {
    .details-grid {
        grid-template-columns: 1fr;
    }
}

.detail-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.full-width {
    grid-column: 1 / -1;
}

.detail-panel h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.analysis-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.analysis-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.analysis-item.valid {
    color: var(--text-main);
}

.insights-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.insight-msg {
    font-size: 0.875rem;
    padding: 0.75rem;
    border-radius: 6px;
    background: rgba(15, 23, 42, 0.5);
    border-left: 3px solid transparent;
}

.insight-msg.danger {
    border-left-color: var(--danger);
    color: #fecaca;
}

.insight-msg.warning {
    border-left-color: var(--warning);
    color: #fde68a;
}

.insight-msg.success {
    border-left-color: var(--success);
    color: #a7f3d0;
}

.insight-msg.neutral {
    border-left-color: var(--secondary);
    color: var(--text-muted);
}

.gen-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.gen-output-wrapper {
    display: flex;
    gap: 0.5rem;
}

#generated-password {
    flex: 1;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
}

.gen-controls {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.gen-controls label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}