/* ============================================
   CYBER4KIDS MODERN THEME - MAIN STYLESHEET
   Cyber-Neon Design System
   ============================================ */

/* --- CSS Variables --- */
:root {
    --bg-dark: #060a14;
    --bg-section: #0b1020;
    --bg-card: rgba(15, 23, 50, 0.7);
    --bg-glass: rgba(15, 23, 50, 0.45);
    --neon-cyan: #00e5ff;
    --neon-green: #00ff88;
    --neon-purple: #7b61ff;
    --neon-pink: #ff3d8b;
    --text-primary: #e8eaf6;
    --text-secondary: #8892b0;
    --text-muted: #5a6380;
    --border-glass: rgba(0, 229, 255, 0.12);
    --glow-cyan: 0 0 20px rgba(0, 229, 255, 0.3);
    --glow-green: 0 0 20px rgba(0, 255, 136, 0.3);
    --glow-purple: 0 0 20px rgba(123, 97, 255, 0.3);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --font-heading: 'Sora', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --transition-smooth: cubic-bezier(0.22, 1, 0.36, 1);
}

/* --- Light Theme --- */
[data-theme="light"] {
    --bg-dark: #f0f2f7;
    --bg-section: #e8ebf2;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.6);
    --neon-cyan: #0097a7;
    --neon-green: #00897b;
    --neon-purple: #5c4dbf;
    --neon-pink: #d81b60;
    --text-primary: #1a2038;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-glass: rgba(0, 151, 167, 0.15);
    --glow-cyan: 0 4px 20px rgba(0, 151, 167, 0.15);
    --glow-green: 0 4px 20px rgba(0, 137, 123, 0.15);
    --glow-purple: 0 4px 20px rgba(92, 77, 191, 0.15);
}
[data-theme="light"] .c4k-hero__grid {
    background-image:
        linear-gradient(rgba(0, 151, 167, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 151, 167, 0.06) 1px, transparent 1px);
}
[data-theme="light"] .c4k-hero__overlay {
    background:
        radial-gradient(ellipse at 30% 20%, rgba(0, 151, 167, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(92, 77, 191, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, transparent 0%, var(--bg-dark) 100%);
}
[data-theme="light"] .c4k-nav.is-scrolled {
    background: rgba(240, 242, 247, 0.9);
    border-bottom-color: rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .c4k-nav__toggle span { background: var(--text-primary); }
[data-theme="light"] .c4k-topic__image {
    background: linear-gradient(135deg, rgba(0, 151, 167, 0.08), rgba(92, 77, 191, 0.06));
}
[data-theme="light"] .c4k-topic__image svg {
    filter: brightness(1.5) contrast(1.1) saturate(0.85);
}
[data-theme="light"] .c4k-stat__number {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
[data-theme="light"] .c4k-hero__title .c4k-gradient-text {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green), var(--neon-purple));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
[data-theme="light"] .c4k-partner img {
    filter: brightness(1) grayscale(0.1);
}
[data-theme="light"] .c4k-partner:hover img {
    filter: brightness(1) grayscale(0);
}
[data-theme="light"] .c4k-section-badge {
    background: rgba(0, 151, 167, 0.08);
    border-color: rgba(0, 151, 167, 0.25);
}
[data-theme="light"] .c4k-back-to-top {
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}
[data-theme="light"] .c4k-form-wrap {
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.06);
}
[data-theme="light"] .c4k-form-wrap input,
[data-theme="light"] .c4k-form-wrap textarea,
[data-theme="light"] .c4k-form-wrap select {
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.1);
    color: var(--text-primary);
}
[data-theme="light"] .c4k-form-wrap input:focus,
[data-theme="light"] .c4k-form-wrap textarea:focus,
[data-theme="light"] .c4k-form-wrap select:focus {
    background: rgba(0, 0, 0, 0.02);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 0 3px rgba(0, 151, 167, 0.1);
}
[data-theme="light"] .c4k-contact {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
}
[data-theme="light"] .c4k-stat {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
}
[data-theme="light"] .c4k-topic {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
}
[data-theme="light"] .c4k-footer {
    border-top-color: rgba(0, 0, 0, 0.08);
}

/* Theme toggle button */
.c4k-theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    padding: 0;
    flex-shrink: 0;
}
.c4k-theme-toggle:hover {
    color: var(--neon-cyan);
    border-color: var(--neon-cyan);
    background: rgba(0, 229, 255, 0.08);
}
.c4k-theme-toggle svg { transition: transform 0.4s ease; }
.c4k-theme-toggle:hover svg { transform: rotate(30deg); }
.c4k-theme-toggle__sun { display: none; }
.c4k-theme-toggle__moon { display: block; }
[data-theme="light"] .c4k-theme-toggle__sun { display: block; }
[data-theme="light"] .c4k-theme-toggle__moon { display: none; }
[data-theme="light"] .c4k-theme-toggle {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
    font-family: var(--font-body);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
ul { list-style: none; }

/* --- Grid System --- */
.c4k-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.c4k-container--wide { max-width: 1400px; }

/* --- Typography --- */
.c4k-heading {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
}
.c4k-heading--xl { font-size: clamp(2.5rem, 6vw, 4.5rem); }
.c4k-heading--lg { font-size: clamp(2rem, 4vw, 3rem); }
.c4k-heading--md { font-size: clamp(1.5rem, 3vw, 2rem); }
.c4k-heading--sm { font-size: clamp(1.1rem, 2vw, 1.35rem); }

.c4k-label {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--neon-cyan);
}

/* --- Section Label Badge --- */
.c4k-section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(0, 229, 255, 0.08);
    border: 1px solid rgba(0, 229, 255, 0.2);
    border-radius: 100px;
    margin-bottom: 20px;
}
.c4k-section-badge::before {
    content: '';
    width: 6px; height: 6px;
    background: var(--neon-cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--neon-cyan);
}

/* --- Reveal Animations --- */
.c4k-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}
.c4k-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.c4k-reveal--left {
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}
.c4k-reveal--left.is-visible { opacity: 1; transform: translateX(0); }
.c4k-reveal--right {
    opacity: 0;
    transform: translateX(60px);
    transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}
.c4k-reveal--right.is-visible { opacity: 1; transform: translateX(0); }
.c4k-reveal--scale {
    opacity: 0;
    transform: scale(0.85);
    transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}
.c4k-reveal--scale.is-visible { opacity: 1; transform: scale(1); }

/* Stagger delays */
[data-delay="1"] { transition-delay: 0.1s !important; }
[data-delay="2"] { transition-delay: 0.2s !important; }
[data-delay="3"] { transition-delay: 0.3s !important; }
[data-delay="4"] { transition-delay: 0.4s !important; }
[data-delay="5"] { transition-delay: 0.5s !important; }
[data-delay="6"] { transition-delay: 0.6s !important; }
[data-delay="7"] { transition-delay: 0.7s !important; }
[data-delay="8"] { transition-delay: 0.8s !important; }
[data-delay="9"] { transition-delay: 0.9s !important; }

/* =============================================
   NAVIGATION
   ============================================= */
.c4k-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.4s ease;
}
.c4k-nav.is-scrolled {
    padding: 10px 0;
    background: rgba(6, 10, 20, 0.85);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border-bottom: 1px solid var(--border-glass);
}
.c4k-nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.c4k-nav__logo img {
    height: 42px;
    width: auto;
    filter: brightness(1.1);
    transition: transform 0.3s ease;
}
.c4k-nav__logo:hover img { transform: scale(1.05); }
.c4k-nav__links {
    display: flex;
    align-items: center;
    gap: 8px;
}
.c4k-nav__link {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 8px 18px;
    border-radius: 100px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    position: relative;
}
.c4k-nav__link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}
.c4k-nav__link--cta {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green));
    color: var(--bg-dark) !important;
    font-weight: 600;
    padding: 8px 24px;
}
.c4k-nav__link--cta:hover {
    box-shadow: var(--glow-cyan), var(--glow-green);
    transform: translateY(-1px);
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green));
}

/* Mobile hamburger */
.c4k-nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}
.c4k-nav__toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}
.c4k-nav__toggle.is-active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.c4k-nav__toggle.is-active span:nth-child(2) { opacity: 0; }
.c4k-nav__toggle.is-active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* =============================================
   HERO SECTION
   ============================================= */
.c4k-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: 120px 24px 80px;
}
.c4k-hero__canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.c4k-hero__overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(0, 229, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(123, 97, 255, 0.06) 0%, transparent 50%),
        linear-gradient(180deg, transparent 0%, var(--bg-dark) 100%);
    z-index: 1;
}
/* Animated grid */
.c4k-hero__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    z-index: 1;
    animation: gridPulse 8s ease-in-out infinite;
}
@keyframes gridPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

.c4k-hero__content {
    position: relative;
    z-index: 2;
    max-width: 860px;
}
.c4k-hero__title {
    margin-bottom: 24px;
}
.c4k-hero__title .c4k-gradient-text {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green), var(--neon-purple));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 6s ease infinite;
}
@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}
.c4k-hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.8;
}
.c4k-hero__cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    padding: 16px 36px;
    border-radius: 100px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green));
    color: var(--bg-dark);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}
.c4k-hero__cta::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 100px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green));
    z-index: -1;
    opacity: 0;
    filter: blur(15px);
    transition: opacity 0.4s ease;
}
.c4k-hero__cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 229, 255, 0.3);
}
.c4k-hero__cta:hover::before { opacity: 1; }

.c4k-hero__scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: scrollBounce 2s ease-in-out infinite;
}
.c4k-hero__scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--neon-cyan), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollBounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }
@keyframes scrollLine { 0%, 100% { opacity: 0.3; height: 40px; } 50% { opacity: 1; height: 50px; } }

/* =============================================
   ABOUT SECTION
   ============================================= */
.c4k-section {
    padding: 100px 0;
    position: relative;
}
.c4k-section--alt { background: var(--bg-section); }
.c4k-section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}
.c4k-section__header .c4k-heading {
    margin-bottom: 16px;
}

.c4k-about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}
.c4k-about__text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.05rem;
}
.c4k-about__highlight {
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}
.c4k-about__highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-green));
}
.c4k-about__highlight h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}
.c4k-about__highlight p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* =============================================
   STATS SECTION
   ============================================= */
.c4k-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.c4k-stat {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transition: all 0.4s var(--transition-smooth);
}
.c4k-stat:hover {
    border-color: var(--neon-cyan);
    transform: translateY(-4px);
    box-shadow: var(--glow-cyan);
}
.c4k-stat__icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 229, 255, 0.1);
    border-radius: 12px;
    color: var(--neon-cyan);
}
.c4k-stat__number {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: 8px;
}
.c4k-stat__label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* =============================================
   PARTNERS SECTION
   ============================================= */
.c4k-partners {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    align-items: stretch;
}
.c4k-partner {
    padding: 28px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    transition: all 0.4s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
}
.c4k-partner img {
    max-height: 60px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    filter: brightness(0.8) grayscale(0.3);
    transition: filter 0.4s ease;
}
.c4k-partner:hover {
    border-color: rgba(0, 229, 255, 0.3);
    box-shadow: var(--glow-cyan);
}
.c4k-partner:hover img { filter: brightness(1) grayscale(0); }

/* =============================================
   TOPICS SECTION
   ============================================= */
.c4k-topics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.c4k-topic {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.5s var(--transition-smooth);
    position: relative;
    cursor: default;
}
.c4k-topic:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 229, 255, 0.3);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), var(--glow-cyan);
}
.c4k-topic__image {
    position: relative;
    height: 200px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.05), rgba(123, 97, 255, 0.05));
}
.c4k-topic__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--transition-smooth);
}
/* Inline SVG topic illustrations */
.c4k-topic__image svg {
    width: 100%;
    height: 100%;
}
.c4k-topic:hover .c4k-topic__image img { transform: scale(1.08); }
.c4k-topic:hover .c4k-topic__image svg { transform: scale(1.05); transition: transform 0.6s var(--transition-smooth); }
.c4k-topic__image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to top, var(--bg-card), transparent);
}
.c4k-topic__body {
    padding: 24px 28px 28px;
}
.c4k-topic__title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--text-primary);
    display: none;
}
.c4k-topic__list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.c4k-topic__item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}
.c4k-topic__item::before {
    content: '';
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    margin-top: 8px;
    background: var(--neon-cyan);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--neon-cyan);
}
.c4k-topic:nth-child(2) .c4k-topic__item::before { background: var(--neon-green); box-shadow: 0 0 6px var(--neon-green); }
.c4k-topic:nth-child(3) .c4k-topic__item::before { background: var(--neon-purple); box-shadow: 0 0 6px var(--neon-purple); }
.c4k-topic:nth-child(4) .c4k-topic__item::before { background: var(--neon-pink); box-shadow: 0 0 6px var(--neon-pink); }
.c4k-topic:nth-child(5) .c4k-topic__item::before { background: var(--neon-cyan); box-shadow: 0 0 6px var(--neon-cyan); }
.c4k-topic:nth-child(6) .c4k-topic__item::before { background: var(--neon-green); box-shadow: 0 0 6px var(--neon-green); }
.c4k-topic:nth-child(7) .c4k-topic__item::before { background: var(--neon-purple); box-shadow: 0 0 6px var(--neon-purple); }
.c4k-topic:nth-child(8) .c4k-topic__item::before { background: var(--neon-pink); box-shadow: 0 0 6px var(--neon-pink); }
.c4k-topic:nth-child(9) .c4k-topic__item::before { background: var(--neon-cyan); box-shadow: 0 0 6px var(--neon-cyan); }

/* Glow border animation on hover */
.c4k-topic::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-lg);
    padding: 1px;
    background: linear-gradient(135deg, transparent, var(--neon-cyan), transparent, var(--neon-green), transparent);
    background-size: 400% 400%;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.5s ease;
    animation: borderGlow 4s linear infinite;
    z-index: 1;
    pointer-events: none;
}
.c4k-topic:hover::before { opacity: 1; }
@keyframes borderGlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* =============================================
   FORM SECTION
   ============================================= */
.c4k-form-section {
    padding: 100px 0;
    background: var(--bg-section);
    position: relative;
}
.c4k-form-section::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.06), transparent 70%);
    pointer-events: none;
}
.c4k-form-wrap {
    max-width: 720px;
    margin: 0 auto;
    padding: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(15px);
    position: relative;
    overflow: hidden;
}
.c4k-form-wrap::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-green), var(--neon-purple));
}

/* Contact Form 7 overrides */
.c4k-form-wrap .wpcf7 { width: 100%; }
.c4k-form-wrap .wpcf7-form { display: flex; flex-direction: column; gap: 20px; }
.c4k-form-wrap label,
.c4k-form-wrap .c4k-form__label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.c4k-form-wrap input[type="text"],
.c4k-form-wrap input[type="email"],
.c4k-form-wrap input[type="tel"],
.c4k-form-wrap input[type="date"],
.c4k-form-wrap input[type="url"],
.c4k-form-wrap input[type="number"],
.c4k-form-wrap textarea,
.c4k-form-wrap select,
.c4k-form-wrap .wpcf7-text,
.c4k-form-wrap .wpcf7-email,
.c4k-form-wrap .wpcf7-tel,
.c4k-form-wrap .wpcf7-textarea,
.c4k-form-wrap .wpcf7-select,
.c4k-form-wrap .wpcf7-date {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    outline: none;
}
.c4k-form-wrap input:focus,
.c4k-form-wrap textarea:focus,
.c4k-form-wrap select:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.1);
    background: rgba(255, 255, 255, 0.06);
}
.c4k-form-wrap textarea { min-height: 120px; resize: vertical; }
.c4k-form-wrap select { cursor: pointer; appearance: auto; }

.c4k-form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.c4k-form-wrap .wpcf7-checkbox label,
.c4k-form-wrap .c4k-checkbox label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}
.c4k-form-wrap input[type="checkbox"] {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    accent-color: var(--neon-cyan);
    margin-top: 2px;
}
.c4k-form-wrap .wpcf7-acceptance .wpcf7-list-item { margin: 0; }

.c4k-form-wrap input[type="submit"],
.c4k-form-wrap .wpcf7-submit,
.c4k-form__submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 16px 32px;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--bg-dark);
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-green));
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.4s ease;
}
.c4k-form-wrap input[type="submit"]:hover,
.c4k-form__submit:hover {
    box-shadow: 0 8px 30px rgba(0, 229, 255, 0.3);
    transform: translateY(-2px);
}

.c4k-form__consent {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.6;
}
.c4k-form__consent a {
    color: var(--neon-cyan);
    text-decoration: underline;
}

/* =============================================
   NEWSLETTER SECTION
   ============================================= */
.c4k-newsletter {
    text-align: center;
    padding: 80px 0;
    position: relative;
}
.c4k-newsletter__cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    padding: 16px 36px;
    color: var(--neon-cyan);
    border: 2px solid var(--neon-cyan);
    border-radius: 100px;
    transition: all 0.4s ease;
    margin-top: 20px;
}
.c4k-newsletter__cta:hover {
    background: var(--neon-cyan);
    color: var(--bg-dark);
    box-shadow: var(--glow-cyan);
    transform: translateY(-2px);
}

/* =============================================
   CONTACTS SECTION
   ============================================= */
.c4k-contacts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 60px;
}
.c4k-contact {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 36px 28px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    transition: all 0.4s ease;
}
.c4k-contact:hover {
    border-color: rgba(0, 229, 255, 0.25);
    transform: translateY(-4px);
}
.c4k-contact__card {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-bottom: 20px;
    overflow: hidden;
    border: 2px solid var(--border-glass);
    transition: border-color 0.4s ease;
    flex-shrink: 0;
}
.c4k-contact:hover .c4k-contact__card { border-color: var(--neon-cyan); box-shadow: var(--glow-cyan); }
.c4k-contact__card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}
.c4k-contact__info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}
.c4k-contact__name {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}
.c4k-contact__role {
    font-size: 0.85rem;
    color: var(--neon-cyan);
    font-weight: 500;
    margin-bottom: 12px;
}
.c4k-contact__details {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.c4k-contact__details a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}
.c4k-contact__details a:hover { color: var(--neon-cyan); }
.c4k-contact__details svg { flex-shrink: 0; color: var(--neon-cyan); opacity: 0.6; }

.c4k-contact-info {
    text-align: center;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
}
.c4k-contact-info p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
}
.c4k-contact-info a {
    color: var(--neon-cyan);
    transition: color 0.3s ease;
}
.c4k-contact-info a:hover { color: var(--neon-green); }

/* =============================================
   FOOTER
   ============================================= */
.c4k-footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-glass);
    text-align: center;
}
.c4k-footer__text {
    font-size: 0.85rem;
    color: var(--text-muted);
}
.c4k-footer__text a { color: var(--neon-cyan); }

.c4k-back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    color: var(--neon-cyan);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    z-index: 999;
    backdrop-filter: blur(10px);
}
.c4k-back-to-top.is-visible { opacity: 1; visibility: visible; }
.c4k-back-to-top:hover {
    background: var(--neon-cyan);
    color: var(--bg-dark);
    box-shadow: var(--glow-cyan);
}

/* =============================================
   DIVIDER / DECORATION
   ============================================= */
.c4k-divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-glass), transparent);
    margin: 0 auto;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
    .c4k-topics { grid-template-columns: repeat(2, 1fr); }
    .c4k-stats { grid-template-columns: repeat(2, 1fr); }
    .c4k-about__grid { grid-template-columns: 1fr; gap: 40px; }
    .c4k-partners { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .c4k-nav__links { 
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 280px;
        flex-direction: column;
        background: rgba(6, 10, 20, 0.97);
        backdrop-filter: blur(20px);
        padding: 100px 32px 32px;
        gap: 8px;
        transition: right 0.4s var(--transition-smooth);
        border-left: 1px solid var(--border-glass);
    }
    .c4k-nav__links.is-open { right: 0; }
    .c4k-nav__toggle { display: flex; }
    .c4k-nav__link { font-size: 1rem; padding: 12px 20px; }

    .c4k-topics { grid-template-columns: 1fr; }
    .c4k-contacts { grid-template-columns: 1fr; }
    .c4k-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .c4k-form__row { grid-template-columns: 1fr; }
    .c4k-form-wrap { padding: 32px 24px; }
    .c4k-hero { min-height: 90vh; padding: 100px 20px 60px; }
    .c4k-section { padding: 70px 0; }
}

@media (max-width: 480px) {
    .c4k-stats { grid-template-columns: 1fr 1fr; }
    .c4k-stat { padding: 28px 16px; }
    .c4k-partners { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .c4k-partner { padding: 20px 16px; min-height: 80px; }
    .c4k-partner img { max-height: 45px; }
}

/* =============================================
   PRINT STYLES
   ============================================= */
@media print {
    .c4k-nav, .c4k-hero__canvas, .c4k-hero__grid, .c4k-hero__overlay, .c4k-back-to-top { display: none !important; }
    body { background: white; color: black; }
}