/* =================================================
   CYBERXDELTA — SHARED DESIGN SYSTEM & ANIMATIONS
   Applies to: index.html, article.html, first_article.html
   ================================================= */

/* ── CSS VARIABLES (Theme Engine) ── */
:root {
    --bg-body: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.95);
    --bg-card: #ffffff;
    --bg-section-alt: #f8f9fc;
    --bg-input: #f1f5f9;
    --text-main: #1a1a1a;
    --text-muted: #555555;
    --text-light: #ffffff;
    --primary: #0056D2;
    --secondary: #00C4CC;
    --accent-glow: rgba(0, 86, 210, 0.12);
    --border-color: #e5e5e5;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    --gradient-text: linear-gradient(135deg, #0056D2 0%, #00C4CC 100%);
    --logo-opacity: 0.6;
    --linkedin-color: #0077b5;
    --bg-code: #f1f5f9;
}

[data-theme="dark"] {
    --bg-body: linear-gradient(135deg, #0f172a 0%, #020617 100%);
    --bg-nav: rgba(15, 23, 42, 0.85);
    --bg-card: rgba(30, 41, 59, 0.45);
    --bg-section-alt: rgba(2, 6, 23, 0.5);
    --bg-input: rgba(15, 23, 42, 0.6);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-light: #ffffff;
    --primary: #38bdf8;
    --secondary: #818cf8;
    --accent-glow: rgba(56, 189, 248, 0.15);
    --border-color: rgba(255, 255, 255, 0.08);
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    --gradient-text: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
    --logo-opacity: 0.5;
    --linkedin-color: #0a66c2;
    --bg-code: #0b0d12;
}

/* ── Reset & Base ── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

body {
    background: var(--bg-body);
    background-attachment: fixed;
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 1.6;
    min-height: 100vh;
}

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

ul {
    list-style: none;
}

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

/* ── Particle Canvas ── */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ── Shimmer Gradient Text ── */
@keyframes shimmer {
    0% {
        background-position: -200% center;
    }

    100% {
        background-position: 200% center;
    }
}

.gradient-text {
    background: linear-gradient(90deg, #38bdf8 0%, #818cf8 25%, #00C4CC 50%, #38bdf8 75%, #818cf8 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 3.5s linear infinite;
    font-weight: 800;
}

[data-theme="light"] .gradient-text {
    background: linear-gradient(90deg, #0056D2 0%, #00C4CC 30%, #0056D2 60%, #00C4CC 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 3.5s linear infinite;
}

/* ── Navbar ── */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: nowrap;
    gap: clamp(10px, 1.5vw, 18px);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    position: relative;
    display: inline-block;
}

/* Glitch effect */
.logo::before,
.logo::after {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
}

.logo:hover::before {
    opacity: 0.85;
    color: #38bdf8;
    clip-path: polygon(0 20%, 100% 20%, 100% 45%, 0 45%);
    animation: glitchA 0.22s steps(3, end) infinite;
}

.logo:hover::after {
    opacity: 0.85;
    color: #818cf8;
    clip-path: polygon(0 55%, 100% 55%, 100% 80%, 0 80%);
    animation: glitchB 0.22s steps(3, end) infinite;
}

@keyframes glitchA {
    0% {
        transform: translate(-5px, 2px) skewX(-9deg);
    }

    33% {
        transform: translate(5px, -2px) skewX(9deg);
    }

    66% {
        transform: translate(-2px, 5px) skewX(-5deg);
    }

    100% {
        transform: translate(2px, -5px) skewX(5deg);
    }
}

@keyframes glitchB {
    0% {
        transform: translate(5px, -2px) skewX(9deg);
    }

    33% {
        transform: translate(-5px, 2px) skewX(-9deg);
    }

    66% {
        transform: translate(2px, -5px) skewX(5deg);
    }

    100% {
        transform: translate(-2px, 5px) skewX(-5deg);
    }
}

.nav-links {
    display: flex;
    gap: clamp(12px, 2vw, 25px);
    align-items: center;
    flex: 1 1 auto;
    justify-content: center;
    min-width: 0;
}

.nav-links a {
    color: var(--text-main);
    font-weight: 500;
    font-size: clamp(0.86rem, 0.8rem + 0.2vw, 0.95rem);
    position: relative;
    white-space: nowrap;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease, left 0.3s ease;
    border-radius: 2px;
}

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

.nav-links a:hover::after {
    width: 100%;
    left: 0;
}

.nav-actions {
    display: flex;
    gap: clamp(8px, 1vw, 12px);
    align-items: center;
    min-width: max-content;
}

.nav-actions > * {
    flex-shrink: 0;
}

.auth-link {
    font-weight: 600;
    color: var(--text-main);
    margin-right: 6px;
    font-size: 0.95rem;
    white-space: nowrap;
}

.nav-actions .btn {
    white-space: nowrap;
}

@media (max-width: 1400px) {
    .nav-links {
        gap: 14px;
    }

    .nav-links a {
        font-size: 0.9rem;
    }

    .auth-link {
        display: none;
    }
}

@media (max-width: 1240px) {
    .nav-links {
        gap: 10px;
    }

    .nav-links a {
        font-size: 0.86rem;
    }

    .nav-links a .icon {
        display: none;
    }

    .nav-actions .btn {
        padding: 9px 16px;
    }
}

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

.hamburger {
    display: none !important;
    font-size: 1.5rem;
    color: var(--text-main);
    cursor: pointer;
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    margin-left: 10px;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: var(--accent-glow);
    color: var(--primary);
}

/* ── Buttons ── */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-text);
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
    -webkit-text-fill-color: initial;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px var(--accent-glow), 0 8px 25px rgba(0, 0, 0, 0.2) !important;
}

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

.btn-outline:hover {
    background: var(--accent-glow);
}

.btn-lg {
    padding: 14px 34px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.9rem;
}

.btn .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0);
    animation: rippleAnim 0.7s ease-out;
    pointer-events: none;
}

@keyframes rippleAnim {
    to {
        transform: scale(5);
        opacity: 0;
    }
}

/* Magnetic button */
.btn-primary {
    transition: transform 0.15s ease, box-shadow 0.3s ease !important;
}

/* ── Card base ── */
.card,
.article-card,
.featured-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow);
    position: relative;
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
        border-color 0.3s, box-shadow 0.35s;
    transform-style: preserve-3d;
    will-change: transform;
    overflow: hidden;
}

.card::before,
.article-card::before,
.featured-card::before {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary) 40%, var(--secondary) 60%, transparent);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.card:hover,
.article-card:hover,
.featured-card:hover {
    border-color: var(--primary);
}

.card:hover::before,
.article-card:hover::before,
.featured-card:hover::before {
    opacity: 1;
    animation: scanLine 0.9s cubic-bezier(0.4, 0, 0.6, 1) forwards;
}

@keyframes scanLine {
    0% {
        top: -2px;
    }

    100% {
        top: 102%;
    }
}

/* ── Scroll Reveal ── */
.reveal {
    opacity: 0;
    transform: translateY(35px);
    transition: opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── Neon Pulse (step icons) ── */
.step-icon {
    animation: neonPulse 3s ease-in-out infinite;
}

.roadmap-step:nth-child(1) .step-icon {
    animation-delay: 0s;
}

.roadmap-step:nth-child(3) .step-icon {
    animation-delay: 0.75s;
}

.roadmap-step:nth-child(5) .step-icon {
    animation-delay: 1.5s;
}

.roadmap-step:nth-child(7) .step-icon {
    animation-delay: 2.25s;
}

@keyframes neonPulse {

    0%,
    100% {
        box-shadow: 0 0 8px var(--accent-glow), 0 0 16px var(--accent-glow);
        border-color: var(--primary);
    }

    50% {
        box-shadow: 0 0 20px var(--accent-glow), 0 0 45px var(--accent-glow), 0 0 90px var(--accent-glow);
        border-color: var(--secondary);
    }
}

/* ── Typewriter cursor ── */
.typewriter-cursor {
    display: inline-block;
    width: 3px;
    height: 1em;
    background: var(--primary);
    margin-left: 4px;
    vertical-align: middle;
    border-radius: 2px;
    animation: cursorBlink 0.75s step-end infinite;
}

@keyframes cursorBlink {

    0%,
    100% {
        opacity: 1
    }

    50% {
        opacity: 0
    }
}

/* ── Stat counter ── */
.stat-item h3 {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

@keyframes badgePop {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }

    70% {
        transform: scale(1.15);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.stat-item.visible h3 {
    animation: badgePop 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ── Trust badges ── */
.trust-badges {
    overflow: hidden;
}

.trust-item {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.5s, transform 0.5s;
}

.trust-badges.visible .trust-item {
    opacity: 1;
    transform: translateX(0);
}

.trust-badges.visible .trust-item:nth-child(2) {
    transition-delay: 0.15s;
}

/* ── Aurora Orbs ── */
.aurora-wrap {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
    mix-blend-mode: screen;
}

.aurora-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0;
    animation: auroraFloat 13s ease-in-out infinite alternate;
}

[data-theme="dark"] .aurora-orb {
    opacity: 0.20;
}

[data-theme="light"] .aurora-orb {
    opacity: 0.18;
}

/* ── Dark Mode Aurora Colors ── */
[data-theme="dark"] .aurora-orb:nth-child(1) {
    background: radial-gradient(circle, #38bdf8, #3b82f6);
}

[data-theme="dark"] .aurora-orb:nth-child(2) {
    background: radial-gradient(circle, #818cf8, #a78bfa);
}

[data-theme="dark"] .aurora-orb:nth-child(3) {
    background: radial-gradient(circle, #00C4CC, #38bdf8);
}

/* ── Light Mode Aurora Colors ── */
[data-theme="light"] .aurora-orb:nth-child(1) {
    background: radial-gradient(circle, #0056D2, #1e40af);
}

[data-theme="light"] .aurora-orb:nth-child(2) {
    background: radial-gradient(circle, #0284c7, #0369a1);
}

[data-theme="light"] .aurora-orb:nth-child(3) {
    background: radial-gradient(circle, #00C4CC, #0891b2);
}

.aurora-orb:nth-child(1) {
    width: 540px;
    height: 540px;
    top: -130px;
    right: -110px;
    animation-duration: 14s;
}

.aurora-orb:nth-child(2) {
    width: 390px;
    height: 390px;
    bottom: -90px;
    left: 8%;
    animation-duration: 11s;
    animation-delay: -5s;
}

.aurora-orb:nth-child(3) {
    width: 270px;
    height: 270px;
    top: 38%;
    left: 44%;
    animation-duration: 18s;
    animation-delay: -9s;
}

@keyframes auroraFloat {
    0% {
        transform: translate(0px, 0px) scale(1.00);
    }

    33% {
        transform: translate(45px, -35px) scale(1.08);
    }

    66% {
        transform: translate(-25px, 22px) scale(0.94);
    }

    100% {
        transform: translate(30px, 12px) scale(1.06);
    }
}

/* ── Cyber grid (hero/page-hero) ── */
.has-grid {
    position: relative;
    overflow: hidden;
}

.has-grid>.container,
.has-grid>* {
    position: relative;
    z-index: 1;
}

.has-grid::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    animation: gridDrift 25s linear infinite;
}

[data-theme="dark"] .has-grid::after {
    background-image:
        linear-gradient(rgba(56, 189, 248, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(56, 189, 248, 0.06) 1px, transparent 1px);
    background-size: 50px 50px;
}

[data-theme="light"] .has-grid::after {
    background-image:
        linear-gradient(rgba(0, 86, 210, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 86, 210, 0.08) 1px, transparent 1px);
    background-size: 50px 50px;
}

@keyframes gridDrift {
    from {
        background-position: 0 0;
    }

    to {
        background-position: 50px 50px;
    }
}

/* ── Footer ── */
footer {
    background: #020617;
    color: #a0a0a0;
    padding: 60px 0 20px;
    margin-top: 60px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3,
.footer-col h4 {
    color: #fff;
    margin-bottom: 20px;
}

.footer-col a {
    display: block;
    color: #888;
    margin-bottom: 10px;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 20px;
    font-size: 0.9rem;
}

/* ── Section helpers ── */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-main);
    margin-bottom: 15px;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

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

.bg-alt {
    background: var(--bg-section-alt);
}

/* ── Dark callout / code ── */
.callout {
    background: rgba(56, 189, 248, 0.08);
    border-left: 4px solid var(--primary);
    padding: 20px;
    border-radius: 0 12px 12px 0;
    margin: 30px 0;
    transition: border-color 0.3s;
}

[data-theme="light"] .callout {
    background: rgba(0, 86, 210, 0.06);
}

.callout h4 {
    margin-top: 0;
    color: var(--primary);
    margin-bottom: 8px;
}

.code-block {
    background: var(--bg-code);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin: 30px 0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    line-height: 1.7;
}

.code-keyword {
    color: var(--secondary);
    font-weight: 600;
}

.code-string {
    color: var(--primary);
}

/* ── Mobile ── */
.mobile-only {
    display: none;
}

@media (max-width: 1024px) {

    .nav-links,
    .nav-actions .auth-link,
    .nav-actions .btn {
        display: none;
    }

    .hamburger {
        display: block !important;
    }

    .mobile-only {
        display: block;
        margin-top: 10px;
        width: 100%;
    }

    .mobile-only .btn {
        width: 100%;
        text-align: center;
        margin-top: 10px;
    }

    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg-nav);
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        align-items: flex-start;
    }
}



/*  Hero Glow Effect  */
[data-theme="dark"] .has-grid::before,
[data-theme="dark"] .hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: var(--primary);
    filter: blur(150px);
    opacity: 0.1;
    z-index: 0;
    pointer-events: none;
}

[data-theme="light"] .has-grid::before,
[data-theme="light"] .hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: var(--primary);
    filter: blur(150px);
    opacity: 0.08;
    z-index: 0;
    pointer-events: none;
}