:root {
    --qd-bg-deep: #060913;
    --qd-bg-main: #0b1120;
    --qd-bg-card: #0f172a;
    --qd-bg-elevated: #1e293b;
    --qd-primary: #2563eb;
    --qd-primary-light: #3b82f6;
    --qd-accent: #06b6d4;
    --qd-emerald: #10b981;
    --qd-border: rgba(148, 163, 184, 0.15);
    --qd-border-highlight: rgba(59, 130, 246, 0.45);
    --qd-text: #f8fafc;
    --qd-text-muted: #94a3b8;
}

html {
    scroll-behavior: smooth;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--qd-bg-deep);
    color: var(--qd-text);
}

body {
    background-color: var(--qd-bg-deep);
    color: var(--qd-text);
    overflow-x: hidden;
}

.qd-hero-bg {
    background-color: var(--qd-bg-deep);
    background-image:
        radial-gradient(at 15% 15%, rgba(37, 99, 235, 0.22) 0px, transparent 50%),
        radial-gradient(at 85% 10%, rgba(6, 182, 212, 0.16) 0px, transparent 50%),
        radial-gradient(at 50% 80%, rgba(30, 64, 175, 0.14) 0px, transparent 60%),
        linear-gradient(to right, rgba(148, 163, 184, 0.04) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(148, 163, 184, 0.04) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 100% 100%, 40px 40px, 40px 40px;
}

.qd-glass {
    background: rgba(15, 23, 42, 0.78);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--qd-border);
}

.qd-card {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.92) 0%, rgba(11, 17, 32, 0.96) 100%);
    border: 1px solid var(--qd-border);
    transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.qd-card:hover {
    border-color: var(--qd-border-highlight);
    box-shadow: 0 16px 40px -12px rgba(37, 99, 235, 0.22);
}

.qd-card-featured {
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.96) 0%, rgba(15, 23, 42, 0.98) 100%);
    border: 1.5px solid rgba(59, 130, 246, 0.65);
    box-shadow: 0 20px 50px -15px rgba(37, 99, 235, 0.35);
}

.qd-gradient-text {
    background: linear-gradient(135deg, #60a5fa 0%, #38bdf8 50%, #34d399 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.qd-btn-primary {
    background: linear-gradient(135deg, #2563eb 0%, #0284c7 100%);
    color: #ffffff;
    transition: all 0.2s ease;
    box-shadow: 0 8px 24px -6px rgba(37, 99, 235, 0.55);
}

.qd-btn-primary:hover {
    background: linear-gradient(135deg, #1d4ed8 0%, #0369a1 100%);
    transform: translateY(-1px);
    box-shadow: 0 12px 28px -6px rgba(37, 99, 235, 0.7);
}

.qd-input {
    background-color: rgba(15, 23, 42, 0.85);
    border: 1px solid rgba(148, 163, 184, 0.22);
    color: #f8fafc;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.qd-input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

@keyframes qdPulseGlow {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.55; transform: scale(1.08); }
}

.qd-pulse-dot {
    animation: qdPulseGlow 2.2s infinite ease-in-out;
}