/* =============================
   Password Strength Checker
   DARTH VADER EDITION
   ============================= */

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

:root {
    --bg-primary: #050505;
    --bg-card: rgba(12, 12, 12, 0.85);
    --bg-panel: rgba(8, 8, 8, 0.95);
    --border: rgba(200, 30, 30, 0.12);
    --border-hover: rgba(200, 30, 30, 0.35);
    --text-primary: #d4d4d4;
    --text-secondary: #707070;
    --text-muted: #444444;
    --accent: #c41e1e;
    --accent-light: #e03030;
    --accent-dark: #8b1515;
    --steel: #2a2a2a;
    --green: #22c55e;
    --yellow: #eab308;
    --orange: #f97316;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 8px;
    --radius-sm: 6px;
    --transition: 0.2s ease;
}

html {
    scroll-behavior: smooth;
}

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

.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(200, 30, 30, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(200, 30, 30, 0.02) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
    z-index: 0;
}

.glow {
    position: fixed;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(180px);
    opacity: 0.06;
    pointer-events: none;
    z-index: 0;
}

.glow-1 {
    background: var(--accent);
    top: -250px;
    left: -150px;
}

.glow-2 {
    background: var(--accent-dark);
    bottom: -250px;
    right: -150px;
}

header {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 40px;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(20px);
    background: rgba(5, 5, 5, 0.9);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

nav {
    display: flex;
    gap: 24px;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: color var(--transition);
}

nav a:hover {
    color: var(--accent-light);
}

main {
    position: relative;
    z-index: 10;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

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

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 4px;
    background: rgba(200, 30, 30, 0.08);
    border: 1px solid rgba(200, 30, 30, 0.2);
    color: var(--accent-light);
    font-size: 0.7rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.accent {
    color: var(--accent-light);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 560px;
    margin: 0 auto;
}

/* Checker Card */
.checker-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    position: relative;
    overflow: hidden;
}

.checker-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), var(--accent-dark), transparent);
    opacity: 0.6;
}

/* Input */
.input-group {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.password-field {
    flex: 1;
    display: flex;
    align-items: center;
    background: var(--bg-panel);
    border: 1px solid var(--steel);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color var(--transition);
}

.password-field:focus-within {
    border-color: var(--accent);
}

.password-field input {
    flex: 1;
    padding: 14px 18px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 1rem;
    outline: none;
    letter-spacing: 0.05em;
}

.password-field input::placeholder {
    color: var(--text-muted);
    font-family: var(--font-sans);
    letter-spacing: 0;
}

.toggle-vis {
    padding: 14px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    opacity: 0.5;
    transition: opacity var(--transition);
}

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

.generate-btn {
    padding: 14px 20px;
    background: var(--accent);
    border: 1px solid var(--accent-light);
    border-radius: var(--radius);
    color: white;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
    transition: all 0.2s;
    box-shadow: 0 4px 16px rgba(200, 30, 30, 0.2);
}

.generate-btn:hover {
    background: var(--accent-light);
    box-shadow: 0 6px 24px rgba(200, 30, 30, 0.35);
}

/* Strength Meter */
.strength-meter {
    margin-bottom: 28px;
}

.meter-bar {
    height: 6px;
    background: var(--steel);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.meter-fill {
    height: 100%;
    width: 0%;
    border-radius: 3px;
    transition: width 0.4s ease, background 0.4s ease;
}

.meter-fill.very-weak {
    width: 15%;
    background: var(--accent);
}

.meter-fill.weak {
    width: 35%;
    background: var(--orange);
}

.meter-fill.fair {
    width: 55%;
    background: var(--yellow);
}

.meter-fill.strong {
    width: 80%;
    background: var(--green);
}

.meter-fill.very-strong {
    width: 100%;
    background: #10b981;
}

.meter-label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    transition: color var(--transition);
}

/* Results */
.results.hidden {
    display: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-panel);
    border: 1px solid var(--steel);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.stat-label {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.stat-unit {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Accent Percentile Card */
.stat-card-accent {
    border-color: rgba(200, 30, 30, 0.25);
    background: rgba(200, 30, 30, 0.04);
    position: relative;
}

.stat-card-accent::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-dark), var(--accent-light), var(--accent-dark));
    border-radius: 2px 2px 0 0;
}

.stat-card-accent .stat-unit {
    color: var(--text-secondary);
    font-weight: 600;
}

/* Verification Badge */
.verification-badge {
    margin-top: 24px;
    padding: 18px 22px;
    background: linear-gradient(135deg, rgba(200, 30, 30, 0.04), rgba(10, 10, 10, 0.9));
    border: 1px solid rgba(200, 30, 30, 0.2);
    border-radius: var(--radius);
    position: relative;
    overflow: hidden;
}

.verification-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.verify-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.verify-icon {
    font-size: 1rem;
}

.verify-title {
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: var(--accent-light);
}

.verify-id {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.06em;
    margin-bottom: 6px;
}

.verify-summary {
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

/* Composition */
.composition {
    margin-bottom: 20px;
}

.composition h3 {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.comp-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.comp-item {
    padding: 10px;
    background: var(--bg-panel);
    border: 1px solid var(--steel);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition);
}

.comp-item.active {
    color: var(--green);
    border-color: rgba(34, 197, 94, 0.2);
}

.comp-item.active .comp-icon {
    color: var(--green);
}

.comp-icon {
    font-size: 0.8rem;
}

/* Warnings */
.warnings {
    margin-bottom: 20px;
    padding: 16px;
    background: rgba(200, 30, 30, 0.06);
    border: 1px solid rgba(200, 30, 30, 0.15);
    border-radius: var(--radius);
}

.warnings.hidden {
    display: none;
}

.warnings h3 {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
    color: var(--accent-light);
}

.warnings ul {
    list-style: none;
}

.warnings li {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
}

.warnings li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* Tips */
.tips {
    padding: 16px;
    background: rgba(34, 197, 94, 0.04);
    border: 1px solid rgba(34, 197, 94, 0.1);
    border-radius: var(--radius);
}

.tips h3 {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
    color: var(--green);
}

.tips ul {
    list-style: none;
}

.tips li {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
}

.tips li::before {
    content: '+';
    position: absolute;
    left: 0;
    color: var(--green);
    font-weight: 700;
}

/* Features */
.features {
    margin-top: 80px;
    text-align: center;
}

.features h2 {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    margin-bottom: 40px;
    text-transform: uppercase;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--steel);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

.feature-icon {
    font-size: 1.4rem;
    margin-bottom: 14px;
}

.feature-card h3 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.feature-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* FAQ */
.faq {
    margin-top: 80px;
}

.faq h2 {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    margin-bottom: 32px;
    text-align: center;
    text-transform: uppercase;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--steel);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-item summary {
    padding: 16px 20px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.2rem;
    color: var(--accent);
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    padding: 0 20px 16px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

.faq-item code {
    background: rgba(200, 30, 30, 0.08);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-light);
}

footer {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 32px;
    border-top: 1px solid var(--steel);
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

footer strong {
    color: var(--accent-light);
}

@media (max-width: 700px) {
    header {
        padding: 16px 20px;
    }

    main {
        padding: 24px 16px 60px;
    }

    .checker-card {
        padding: 20px 16px;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .comp-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}