/* Revtect.ai - Premium Modern Theme */

:root {
    /* Black & White Theme with Purple Accents */
    --primary-color: hsl(250, 85%, 60%);
    --primary-dark: hsl(250, 80%, 52%);
    --primary-light: hsl(250, 90%, 72%);
    --accent-color: hsl(250, 85%, 60%);
    --accent-light: hsl(250, 90%, 72%);
    
    /* Text hierarchy - Black & White */
    --text-primary: hsl(0, 0%, 98%);
    --text-secondary: hsl(0, 0%, 70%);
    --text-light: hsl(0, 0%, 55%);
    --text-dark: hsl(0, 0%, 15%);
    
    /* Backgrounds - Black & White */
    --bg-dark: hsl(0, 0%, 8%);
    --bg-card: hsl(0, 0%, 12%);
    --bg-elevated: hsl(0, 0%, 16%);
    --bg-hover: hsl(0, 0%, 20%);
    --bg-surface: hsl(0, 0%, 10%);
    --bg-white: hsl(0, 0%, 100%);
    --bg-light: hsl(0, 0%, 96%);
    
    /* Borders - Subtle grays */
    --border-color: hsl(0, 0%, 25%);
    --border-subtle: hsl(0, 0%, 20%);
    --border-accent: hsla(250, 85%, 60%, 0.4);
    --border-light: hsl(0, 0%, 30%);
    
    /* Status - Using purple accent for success, keeping others */
    --success-color: hsl(250, 85%, 60%);
    --warning-color: hsl(38, 92%, 50%);
    --error-color: hsl(0, 72%, 55%);
    
    /* Gradients - Black & White with Purple Accents */
    --gradient-primary: linear-gradient(135deg, hsl(250, 85%, 60%) 0%, hsl(280, 75%, 55%) 100%);
    --gradient-accent: linear-gradient(135deg, hsl(250, 85%, 60%) 0%, hsl(250, 90%, 72%) 100%);
    --gradient-surface: linear-gradient(180deg, hsl(250, 85%, 15%) 0%, hsl(250, 85%, 10%) 20%, hsl(0, 0%, 10%) 50%, hsl(0, 0%, 8%) 100%);
    --gradient-card: linear-gradient(145deg, hsl(0, 0%, 12%) 0%, hsl(0, 0%, 10%) 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px hsla(0, 0%, 0%, 0.3);
    --shadow-md: 0 4px 16px hsla(0, 0%, 0%, 0.4);
    --shadow-lg: 0 8px 32px hsla(0, 0%, 0%, 0.5);
    --shadow-glow: 0 4px 24px hsla(250, 85%, 60%, 0.3);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: linear-gradient(180deg, 
        hsl(250, 85%, 12%) 0%, 
        hsl(250, 85%, 10%) 15%, 
        hsl(250, 60%, 8%) 30%, 
        hsl(0, 0%, 10%) 60%, 
        hsl(0, 0%, 8%) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    position: relative;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 1rem;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

h1 {
    font-size: 2.75rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--text-primary);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    background: hsla(0, 0%, 12%, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.35rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s ease;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.25s ease;
    border-radius: 1px;
}

.nav a:hover {
    color: var(--text-primary);
}

.nav a:hover::after {
    width: 100%;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1.5rem;
    border-radius: 10px;
    font-weight: 550;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: all 0.25s ease;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 28px hsla(250, 85%, 60%, 0.3);
}

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

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

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

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-light);
    background: hsla(250, 85%, 60%, 0.08);
}

/* Hero Section */
.hero {
    background: linear-gradient(180deg, 
        hsl(250, 85%, 12%) 0%, 
        hsl(250, 85%, 10%) 20%, 
        hsl(250, 60%, 8%) 50%, 
        hsl(0, 0%, 8%) 100%);
    padding: 5rem 0 6rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: radial-gradient(ellipse at top center, 
        hsla(250, 85%, 60%, 0.2) 0%, 
        hsla(250, 85%, 60%, 0.1) 30%, 
        hsla(250, 60%, 50%, 0.05) 60%, 
        transparent 100%);
    pointer-events: none;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to bottom, 
        transparent 0%, 
        hsl(0, 0%, 8%) 100%);
    pointer-events: none;
    z-index: 0;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.25rem;
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.75;
    position: relative;
    z-index: 1;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

/* Section */
.section {
    padding: 5rem 0;
    position: relative;
    background: linear-gradient(180deg, 
        hsl(0, 0%, 8%) 0%, 
        hsl(0, 0%, 10%) 100%);
}

.section-alt {
    background: linear-gradient(180deg, 
        hsl(0, 0%, 10%) 0%, 
        hsl(0, 0%, 8%) 100%);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-title h2 {
    margin-bottom: 0.75rem;
}

.section-title p {
    font-size: 1.05rem;
    color: var(--text-light);
    max-width: 500px;
    margin: 0 auto;
}

/* Grid */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 1.75rem;
    transition: all 0.3s ease;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    padding: 1px;
    background: linear-gradient(135deg, hsla(250, 85%, 60%, 0.2) 0%, transparent 50%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    background: var(--bg-elevated);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.card:hover::before {
    opacity: 1;
}

.card-icon {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.15rem;
}

/* Pricing Cards */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-top: 3rem;
}

@media (max-width: 1600px) {
    .pricing-grid {
        gap: 0.75rem;
    }
}

@media (max-width: 1200px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 1.5rem;
    position: relative;
    transition: all 0.3s ease;
    min-width: 0;
}

.pricing-card:hover {
    border-color: var(--border-color);
    box-shadow: var(--shadow-md);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    background: linear-gradient(180deg, hsla(250, 85%, 60%, 0.08) 0%, var(--bg-card) 100%);
    box-shadow: var(--shadow-glow);
}

.pricing-card.featured::before {
    content: 'Recommended';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: 0.35rem 1rem;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.pricing-header {
    text-align: center;
    margin-bottom: 1.75rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.pricing-name {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.pricing-description {
    color: var(--text-light);
    font-size: 0.9rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 1.75rem;
}

.pricing-features li {
    padding: 0.6rem 0;
    padding-left: 1.75rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.925rem;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

.pricing-features li.unavailable {
    color: var(--text-light);
    opacity: 0.6;
}

.pricing-features li.unavailable::before {
    content: '—';
    color: var(--text-light);
}

/* Forms */
.form-group {
    margin-bottom: 1.35rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 550;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.95rem;
    background: var(--bg-elevated);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px hsla(250, 85%, 60%, 0.15);
}

.form-input::placeholder {
    color: var(--text-light);
}

.form-select {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.95rem;
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.form-error {
    color: var(--error-color);
    font-size: 0.825rem;
    margin-top: 0.4rem;
}

.form-success {
    color: var(--success-color);
    font-size: 0.825rem;
    margin-top: 0.4rem;
}

/* Footer */
.footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-subtle);
    padding: 3.5rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.footer h4 {
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
    font-weight: 600;
}

.footer a {
    color: var(--text-light);
    display: block;
    margin-bottom: 0.6rem;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-light);
    font-size: 0.85rem;
}

/* Auth Pages */
.auth-container {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 2.5rem;
    max-width: 420px;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

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

.auth-header h1 {
    margin-bottom: 0.5rem;
    font-size: 1.6rem;
}

.auth-header p {
    color: var(--text-light);
    font-size: 0.95rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.9rem;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
}

.stat-number {
    font-size: 2.75rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
    letter-spacing: -0.02em;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.925rem;
}

/* Steps */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.step {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
}

.step:hover {
    border-color: var(--border-accent);
}

.step-number {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 1.25rem;
    box-shadow: var(--shadow-glow);
}

.step h3 {
    margin-bottom: 0.5rem;
}

/* Alert */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background: hsla(158, 64%, 52%, 0.12);
    border: 1px solid hsla(158, 64%, 52%, 0.25);
    color: var(--success-color);
}

.alert-error {
    background: hsla(0, 72%, 55%, 0.12);
    border: 1px solid hsla(0, 72%, 55%, 0.25);
    color: var(--error-color);
}

.alert-info {
    background: hsla(250, 85%, 60%, 0.12);
    border: 1px solid hsla(250, 85%, 60%, 0.25);
    color: var(--primary-light);
}

/* Loading */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* API Endpoint Cards */
.endpoint-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    padding: 1.25rem;
    border-radius: 10px;
    margin-top: 1rem;
    transition: all 0.25s ease;
}

.endpoint-card:hover {
    background: var(--bg-hover);
    border-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}

.endpoint-method {
    display: block;
    font-family: 'Courier New', 'Monaco', monospace;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.endpoint-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.endpoint-meta {
    font-size: 0.85rem;
    color: var(--text-light);
    margin: 0;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
}

.endpoint-meta strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Priority Level Boxes */
.priority-box {
    padding: 1.25rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    border-left: 4px solid;
    transition: all 0.25s ease;
}

.priority-box:last-child {
    margin-bottom: 0;
}

.priority-box strong {
    color: var(--text-primary);
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}

.priority-high {
    background: hsla(0, 72%, 55%, 0.15);
    border-left-color: var(--error-color);
}

.priority-high:hover {
    background: hsla(0, 72%, 55%, 0.2);
    transform: translateX(4px);
}

.priority-medium {
    background: hsla(38, 92%, 50%, 0.15);
    border-left-color: var(--warning-color);
}

.priority-medium:hover {
    background: hsla(38, 92%, 50%, 0.2);
    transform: translateX(4px);
}

.priority-low {
    background: hsla(250, 85%, 60%, 0.15);
    border-left-color: var(--primary-color);
}

.priority-low:hover {
    background: hsla(250, 85%, 60%, 0.2);
    transform: translateX(4px);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.05rem;
    }
    
    .nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .auth-card {
        padding: 1.75rem;
    }
    
    .section {
        padding: 3.5rem 0;
    }
}