/* ============================================================
   SecureDNS — Static Website Styles
   Design Language: Dark, sleek, cybersecurity aesthetic
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-bg: #050510;
    --color-bg-alt: #0a0a1a;
    --color-bg-card: #0f0f23;
    --color-bg-card-hover: #14142e;
    --color-surface: #1a1a35;
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(0, 212, 255, 0.2);
    --color-text: #e0e0f0;
    --color-text-muted: #8888aa;
    --color-text-dim: #555577;
    --color-accent: #00d4ff;
    --color-accent-dim: rgba(0, 212, 255, 0.15);
    --color-accent-glow: rgba(0, 212, 255, 0.4);
    --color-accent-2: #6366f1;
    --color-accent-3: #a855f7;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: #fff;
}

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

::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* --- Animated Background --- */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

.bg-glow--1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    animation: floatGlow1 20s ease-in-out infinite;
}

.bg-glow--2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-accent-3) 0%, transparent 70%);
    bottom: -200px;
    left: -200px;
    animation: floatGlow2 25s ease-in-out infinite;
}

@keyframes floatGlow1 {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-80px, 60px); }
    50% { transform: translate(-40px, 120px); }
    75% { transform: translate(40px, 40px); }
}

@keyframes floatGlow2 {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(60px, -40px); }
    50% { transform: translate(100px, -80px); }
    75% { transform: translate(40px, -20px); }
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 24px;
    transition: var(--transition);
    backdrop-filter: blur(0);
    background: transparent;
}

.nav--scrolled {
    backdrop-filter: blur(20px) saturate(180%);
    background: rgba(5, 5, 16, 0.8);
    border-bottom: 1px solid var(--color-border);
}

.nav__container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.nav__logo:hover {
    color: #fff;
}

.nav__logo-icon {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

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

.nav__links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav__link {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}

.nav__link:hover {
    color: #fff;
}

.nav__link:hover::after {
    width: 100%;
}

.nav__cta {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav__cta:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--color-border-hover);
    color: #fff;
}

.nav__mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav__mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(5, 5, 16, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    z-index: 999;
    flex-direction: column;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
}

.mobile-menu--open {
    display: flex;
}

.mobile-menu__link {
    color: var(--color-text-muted);
    padding: 14px 16px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.mobile-menu__link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 100px 24px 60px;
    z-index: 1;
}

.hero__banner {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 40px;
    width: 100%;
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
}

.hero__banner-glow {
    position: absolute;
    width: 80%;
    height: 100%;
    background: radial-gradient(ellipse at center bottom, rgba(0, 212, 255, 0.18) 0%, rgba(99, 102, 241, 0.08) 40%, transparent 70%);
    filter: blur(60px);
    animation: bannerGlow 4s ease-in-out infinite;
    pointer-events: none;
}

@keyframes bannerGlow {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.03); }
}

.hero__banner-img {
    position: relative;
    width: 100%;
    max-width: 700px;
    height: auto;
    filter: drop-shadow(0 0 40px rgba(0, 212, 255, 0.12)) drop-shadow(0 30px 60px rgba(0, 0, 0, 0.5));
    animation: heroFloat 6s ease-in-out infinite;
}

@keyframes heroFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.hero__container--stacked {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero__content--centered {
    text-align: center;
}

.hero__content--centered .hero__badge {
    margin-left: auto;
    margin-right: auto;
}

.hero__content--centered .hero__subtitle {
    margin-left: auto;
    margin-right: auto;
}

.hero__content--centered .hero__actions {
    justify-content: center;
}

.hero__content--centered .hero__stats {
    justify-content: center;
}

.hero__container {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--color-accent-dim);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 24px;
    width: fit-content;
}

.hero__badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--color-accent-glow); }
    50% { opacity: 0.7; box-shadow: 0 0 0 8px transparent; }
}

.hero__title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.04em;
    color: #fff;
    margin-bottom: 24px;
}

.hero__title-accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 50%, var(--color-accent-3) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 520px;
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero__subtitle strong {
    color: var(--color-accent);
    font-weight: 600;
}

.hero__actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero__stats {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero__stat img {
    border-radius: 4px;
}

/* Hero Visual — legacy, kept for compatibility */
.hero__visual {
    display: none;
}

/* Scroll Indicator */
.hero__scroll {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: auto;
    padding-top: 40px;
    color: var(--color-text-dim);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero__scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
    color: #050510;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}

.btn--primary:hover {
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.4);
    transform: translateY(-2px);
    color: #050510;
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    border: 1px solid var(--color-border);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-border-hover);
    color: #fff;
    transform: translateY(-2px);
}

.btn--lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

/* --- Section Base --- */
.section {
    position: relative;
    padding: 120px 24px;
    z-index: 1;
}

.section--dark {
    background: rgba(0, 0, 0, 0.3);
}

.section--cta {
    padding: 100px 24px;
}

.section__container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section__header {
    text-align: center;
    margin-bottom: 72px;
}

.section__label {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-accent-dim);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}

.section__title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: #fff;
    margin-bottom: 20px;
}

.section__description {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.8;
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Protocols Grid --- */
.protocols-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.protocol-card {
    position: relative;
    padding: 32px 28px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    overflow: hidden;
}

.protocol-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.03), transparent);
    opacity: 0;
    transition: var(--transition);
}

.protocol-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

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

.protocol-card__status {
    position: absolute;
    top: 16px;
    right: 16px;
}

.protocol-card__status--done {
    color: var(--color-success);
}

.protocol-card__status--wip {
    color: var(--color-warning);
}

.protocol-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--color-accent);
}

.protocol-card__icon svg {
    width: 36px;
    height: 36px;
}

.protocol-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.protocol-card__desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.protocol-card--pending {
    opacity: 0.6;
}

.protocol-card--pending:hover {
    opacity: 0.85;
}

/* --- Features Grid --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    padding: 36px 28px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-card__icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-dim);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-sm);
    margin-bottom: 22px;
    color: var(--color-accent);
}

.feature-card__icon svg {
    width: 28px;
    height: 28px;
}

.feature-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.feature-card__desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* --- Platforms --- */
.platforms-showcase {
    max-width: 900px;
    margin: 0 auto;
}

.platforms-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 36px 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    text-align: center;
}

.platform-item:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.platform-item__icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
}

.platform-item__icon svg {
    width: 100%;
    height: 100%;
}

.platform-item__name {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
}

.platform-item__detail {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.platforms-arch {
    text-align: center;
}

.platforms-arch__title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}

.platforms-arch__grid {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.arch-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    font-family: var(--font-mono);
    transition: var(--transition);
}

.arch-chip:hover {
    border-color: var(--color-border-hover);
    background: var(--color-bg-card-hover);
}

.arch-chip__icon {
    font-size: 0.9rem;
}

/* --- Architecture Diagram --- */
.arch-diagram {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.arch-connector {
    color: var(--color-text-dim);
    padding: 8px 0;
}

.arch-layer {
    width: 100%;
    padding: 28px 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.arch-layer:hover {
    border-color: var(--color-border-hover);
}

.arch-layer--1 { border-left: 3px solid var(--color-accent); }
.arch-layer--2 { border-left: 3px solid var(--color-accent-2); }
.arch-layer--3 { border-left: 3px solid var(--color-accent-3); }
.arch-layer--4 { border-left: 3px solid var(--color-success); }

.arch-layer__label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.arch-layer__items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.arch-tag {
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    font-family: var(--font-mono);
}

/* --- Packages Grid --- */
.packages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.package-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    color: #fff;
}

.package-card:hover {
    border-color: var(--color-border-hover);
    background: var(--color-bg-card-hover);
    color: #fff;
    transform: translateY(-2px);
}

.package-card__name {
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

/* --- CTA Section --- */
.cta {
    position: relative;
    text-align: center;
    padding: 80px 48px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.cta__glow {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 300px;
    background: radial-gradient(ellipse, rgba(0, 212, 255, 0.12), transparent 70%);
    pointer-events: none;
}

.cta__title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    position: relative;
}

.cta__desc {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 500px;
    margin: 0 auto 36px;
    line-height: 1.8;
    position: relative;
}

.cta__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
}

/* --- Footer --- */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--color-border);
    padding: 64px 24px 32px;
    background: rgba(0, 0, 0, 0.2);
}

.footer__container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer__top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 48px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer__logo-icon {
    width: 24px;
    height: 24px;
    color: var(--color-accent);
}

.footer__logo-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
}

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

.footer__tagline {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    max-width: 300px;
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer__col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer__col-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

.footer__col a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer__col a:hover {
    color: var(--color-accent);
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.footer__copyright {
    font-size: 0.85rem;
    color: var(--color-text-dim);
}

.footer__sponsors {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

.footer__sponsors img {
    opacity: 0.5;
    transition: var(--transition);
}

.footer__sponsors img:hover {
    opacity: 0.8;
}

/* --- Scroll Animations --- */
.section__header,
.protocol-card,
.feature-card,
.platform-item,
.arch-layer,
.package-card,
.integration-card,
.video-card,
.cta {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.section__header.visible,
.protocol-card.visible,
.feature-card.visible,
.platform-item.visible,
.arch-layer.visible,
.package-card.visible,
.integration-card.visible,
.video-card.visible,
.cta.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animation delays */
.protocol-card:nth-child(1) { transition-delay: 0s; }
.protocol-card:nth-child(2) { transition-delay: 0.08s; }
.protocol-card:nth-child(3) { transition-delay: 0.16s; }
.protocol-card:nth-child(4) { transition-delay: 0.24s; }
.protocol-card:nth-child(5) { transition-delay: 0.32s; }
.protocol-card:nth-child(6) { transition-delay: 0.40s; }

.feature-card:nth-child(1) { transition-delay: 0s; }
.feature-card:nth-child(2) { transition-delay: 0.08s; }
.feature-card:nth-child(3) { transition-delay: 0.16s; }
.feature-card:nth-child(4) { transition-delay: 0.24s; }
.feature-card:nth-child(5) { transition-delay: 0.32s; }
.feature-card:nth-child(6) { transition-delay: 0.40s; }

.package-card:nth-child(1) { transition-delay: 0s; }
.package-card:nth-child(2) { transition-delay: 0.06s; }
.package-card:nth-child(3) { transition-delay: 0.12s; }
.package-card:nth-child(4) { transition-delay: 0.18s; }
.package-card:nth-child(5) { transition-delay: 0.24s; }
.package-card:nth-child(6) { transition-delay: 0.30s; }
.package-card:nth-child(7) { transition-delay: 0.36s; }
.package-card:nth-child(8) { transition-delay: 0.42s; }

/* --- Protocol card pending override for visibility --- */
.protocol-card--pending.visible {
    opacity: 0.6;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .protocols-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav__links {
        display: none;
    }

    .nav__mobile-toggle {
        display: flex;
    }

    .hero__container {
        text-align: center;
    }

    .hero__banner-img {
        max-width: 400px;
    }

    .hero__logo-img {
        max-width: 320px;
    }

    .video-grid {
        grid-template-columns: 1fr;
    }

    .integrations-grid {
        grid-template-columns: 1fr;
    }

    .protocols-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .platforms-row {
        grid-template-columns: 1fr;
    }

    .packages-grid {
        grid-template-columns: 1fr;
    }

    .footer__top {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer__links {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .footer__bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .cta {
        padding: 48px 24px;
    }

    .section {
        padding: 80px 24px;
    }
}

@media (max-width: 480px) {
    .footer__links {
        grid-template-columns: 1fr;
    }

    .platforms-arch__grid {
        flex-direction: column;
        align-items: center;
    }

    .arch-chip {
        width: 100%;
        justify-content: center;
    }

    .btn--lg {
        padding: 14px 28px;
        font-size: 0.95rem;
    }
}

/* --- Video Section --- */
.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.video-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.video-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.video-card__embed {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background: #000;
}

.video-card__embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-card__info {
    padding: 24px;
}

.video-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.video-card__desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 16px;
}

.video-card__desc a {
    color: var(--color-accent);
}

.btn--sm {
    padding: 8px 18px;
    font-size: 0.85rem;
}

/* --- Integrations Grid --- */
.integrations-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.integration-card {
    position: relative;
    padding: 32px 28px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.integration-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.integration-card__status {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 1rem;
}

.integration-card--done .integration-card__status {
    color: var(--color-success);
}

.integration-card--pending .integration-card__status {
    color: var(--color-warning);
}

.integration-card--pending {
    opacity: 0.6;
}

.integration-card--pending:hover {
    opacity: 0.85;
}

.integration-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--color-accent);
}

.integration-card__icon svg {
    width: 36px;
    height: 36px;
}

.integration-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.integration-card__desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 12px;
}

.integration-card__link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    transition: var(--transition);
}

.integration-card__link:hover {
    color: #fff;
}

/* Stagger integration cards */
.integration-card:nth-child(1) { transition-delay: 0s; }
.integration-card:nth-child(2) { transition-delay: 0.08s; }
.integration-card:nth-child(3) { transition-delay: 0.16s; }
.integration-card:nth-child(4) { transition-delay: 0.24s; }
.integration-card:nth-child(5) { transition-delay: 0.32s; }
.integration-card:nth-child(6) { transition-delay: 0.40s; }

.video-card:nth-child(1) { transition-delay: 0s; }
.video-card:nth-child(2) { transition-delay: 0.12s; }

@media (max-width: 1024px) {
    .integrations-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}