:root {
    --tdx-bg: #0b0f18;
    --tdx-bg-soft: #0f1624;
    --tdx-text: #e6edf7;
    --tdx-text-soft: #9aa4b2;
    --tdx-blue: #2f6bff;
    --tdx-purple: #7a3cff;
    --tdx-cyan: #00e0ff;
    --tdx-lime: #b8ff3b;
    --tdx-lime-glow: rgba(184, 255, 59, 0.35);
    --tdx-grad: linear-gradient(135deg, #2f6bff 0%, #7a3cff 52%, #00e0ff 100%);
    --tdx-border: rgba(230, 237, 247, 0.14);
    --tdx-glow: 0 12px 40px rgba(47, 107, 255, 0.24), 0 0 40px rgba(0, 224, 255, 0.14);
    --tdx-radius: 18px;
    --tdx-radius-sm: 12px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', 'Segoe UI', sans-serif;
    color: var(--tdx-text);
    background: radial-gradient(circle at 12% 12%, rgba(47, 107, 255, 0.12), transparent 40%), radial-gradient(circle at 85% 22%, rgba(122, 60, 255, 0.14), transparent 38%), var(--tdx-bg);
    line-height: 1.65;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

h1,
h2,
h3,
h4 {
    line-height: 1.15;
    margin: 0 0 0.7rem;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 4vw, 3.6rem);
    font-weight: 800;
}

h2 {
    font-size: clamp(1.6rem, 2.8vw, 2.7rem);
    font-weight: 700;
}

h3 {
    font-size: clamp(1.1rem, 2vw, 1.45rem);
    font-weight: 600;
}

p {
    margin: 0 0 1rem;
    color: var(--tdx-text-soft);
}

.section-kicker {
    display: inline-block;
    margin-bottom: 0.8rem;
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--tdx-cyan);
}

.lead {
    font-size: clamp(1rem, 1.7vw, 1.2rem);
}

.section-space {
    padding: clamp(4.5rem, 10vw, 8rem) 0;
}

.section-intro {
    max-width: 72ch;
}

.tdx-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    border-radius: 999px;
    border: 1px solid transparent;
    padding: 0.9rem 1.3rem;
    font-weight: 600;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.tdx-btn-primary {
    background: var(--tdx-grad);
    color: #f7fbff;
    box-shadow: var(--tdx-glow);
}

.tdx-btn-outline {
    border-color: var(--tdx-border);
    color: var(--tdx-text);
    background: rgba(255, 255, 255, 0.02);
}

.tdx-btn-large {
    font-size: 1.05rem;
    padding: 1rem 1.9rem;
}

.tdx-btn:hover,
.tdx-btn:focus-visible {
    transform: translateY(-2px);
}

.tdx-btn-outline:hover,
.tdx-btn-outline:focus-visible {
    border-color: rgba(0, 224, 255, 0.6);
    box-shadow: 0 8px 30px rgba(0, 224, 255, 0.2);
}

.reveal-up {
    opacity: 0;
    transform: translateY(28px) scale(0.985);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-up.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

#tdx-particles {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.55;
    z-index: -1;
}

.tdx-bg-orb {
    position: fixed;
    width: 36rem;
    height: 36rem;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(90px);
    opacity: 0.15;
    z-index: -1;
}

.tdx-bg-orb-1 {
    top: -12rem;
    left: -10rem;
    background: #2f6bff;
}

.tdx-bg-orb-2 {
    top: 35%;
    right: -14rem;
    background: #7a3cff;
}

@media (max-width: 768px) {
    .section-space {
        padding: 4rem 0;
    }
}