:root {
    --bg-main: #090a0f;
    --bg-surface: rgba(18, 22, 34, 0.7);
    --bg-surface-hover: rgba(28, 34, 52, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(99, 102, 241, 0.35);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --primary: #6366f1;
    --primary-glow: #818cf8;
    --accent: #38bdf8;
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.12);
    
    --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Space Grotesk', monospace;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Background canvas and glow elements */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: 0;
    pointer-events: none;
    opacity: 0.45;
}

.bg-glow-1 {
    top: -10%;
    left: 15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #6366f1 0%, rgba(99, 102, 241, 0) 70%);
}

.bg-glow-2 {
    bottom: -10%;
    right: 15%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #0284c7 0%, rgba(2, 132, 199, 0) 70%);
}

/* Container */
.container {
    position: relative;
    z-index: 1;
    max-width: 880px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    justify-content: space-between;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: default;
}

.logo-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #6366f1, #38bdf8);
    border-radius: 10px;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.95rem;
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

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

.status-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.9rem;
    background: var(--success-bg);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--success);
    backdrop-filter: blur(8px);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
}

/* Hero Section */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin: 2rem 0;
}

.tag-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    padding: 0.4rem 1rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 1.2rem;
    max-width: 700px;
}

.gradient-text {
    background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 50%, #38bdf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2.5rem;
    font-weight: 400;
}

/* Diagnostic Card */
.diagnostic-card {
    width: 100%;
    max-width: 640px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(20px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    margin-bottom: 2rem;
    text-align: left;
    transition: border-color 0.3s ease;
}

.diagnostic-card:hover {
    border-color: var(--border-glow);
}

.diagnostic-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.diagnostic-title {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.live-tag {
    font-size: 0.7rem;
    font-weight: 700;
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-glow);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.diagnostic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.diag-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    padding: 0.75rem 1rem;
    border-radius: 10px;
}

.diag-icon {
    font-size: 1.25rem;
}

.diag-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.diag-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.diag-val {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.check-mark {
    color: var(--success);
    font-weight: 700;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    background: var(--success-bg);
    border-radius: 50%;
}

/* Newsletter / Notification Card */
.newsletter-card {
    width: 100%;
    max-width: 580px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 1.75rem;
    text-align: center;
}

.newsletter-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.newsletter-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.notify-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-wrapper {
    display: flex;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    padding: 0.35rem;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.input-wrapper input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    padding: 0.6rem 1rem;
    font-family: var(--font-main);
    font-size: 0.92rem;
}

.input-wrapper input::placeholder {
    color: var(--text-muted);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #6366f1, #4f46e5);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 0.6rem 1.25rem;
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #4f46e5, #4338ca);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.form-feedback {
    font-size: 0.85rem;
    min-height: 1.2rem;
    transition: all 0.3s ease;
}

.form-feedback.success {
    color: var(--success);
}

.form-feedback.error {
    color: #f87171;
}

/* Footer */
.footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-link:hover {
    color: var(--text-primary);
}

.separator {
    color: var(--border-color);
}

.footer-version {
    font-family: var(--font-mono);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 1.5rem 1rem;
    }
    
    .input-wrapper {
        flex-direction: column;
        background: transparent;
        border: none;
        padding: 0;
        gap: 0.75rem;
    }
    
    .input-wrapper input {
        background: rgba(0, 0, 0, 0.4);
        border: 1px solid var(--border-color);
        border-radius: 10px;
        padding: 0.8rem 1rem;
    }
    
    .btn-primary {
        justify-content: center;
        padding: 0.8rem;
        border-radius: 10px;
    }

    .footer {
        flex-direction: column;
        text-align: center;
    }
}