/* ==================== KAT – Modern Redesign ==================== */

@import url('https://fonts.googleapis.com/css2?family=Heebo:wght@300;400;500;600;700;800;900&family=Great+Vibes&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Refined Neon Palette */
    --neon-red: #FF2D55;
    --neon-cyan: #00E5FF;
    --neon-green: #00E676;
    --neon-yellow: #FFEA00;
    --neon-pink: #FF2D95;
    --neon-violet: #D500F9;
    
    /* Backgrounds */
    --bg-deep: #050508;
    --bg-primary: #0B0B12;
    --surface: #12121A;
    --surface-elevated: #1A1A24;
    --surface-card: rgba(26, 26, 36, 0.7);
    
    /* Borders & Glows */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(0, 229, 255, 0.25);
    --glow-pink: rgba(255, 45, 149, 0.35);
    --glow-cyan: rgba(0, 229, 255, 0.3);
    
    /* Text */
    --text-primary: #F5F5F7;
    --text-secondary: #A0A0B0;
    --text-muted: #6B6B7B;
    
    /* Spacing & Radius */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Heebo', system-ui, -apple-system, sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Subtle ambient background */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 20% -10%, rgba(255, 45, 149, 0.12), transparent),
        radial-gradient(ellipse 60% 40% at 80% 10%, rgba(0, 229, 255, 0.08), transparent),
        radial-gradient(ellipse 50% 30% at 50% 100%, rgba(213, 0, 249, 0.06), transparent);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==================== NAVIGATION ==================== */

.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    background: rgba(11, 11, 18, 0.75);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.875rem 0;
    z-index: 1000;
    transition: background 0.3s var(--ease);
}

.nav-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--neon-pink) 0%, var(--neon-violet) 50%, var(--neon-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.25rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    transition: all 0.25s var(--ease);
}

.nav-links a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-links a.active {
    color: var(--neon-cyan);
    background: rgba(0, 229, 255, 0.1);
}

/* Mobile menu toggle (hidden on desktop) */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
}

/* ==================== HERO ==================== */

.hero {
    padding: 6rem 0 5rem;
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    position: relative;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.hero-title {
    font-size: clamp(3rem, 7vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, #fff 0%, var(--neon-pink) 40%, var(--neon-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--neon-cyan);
    margin-bottom: 1.5rem;
    letter-spacing: 0.04em;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 480px;
    line-height: 1.75;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.875rem;
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hero-stats span {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.hero-visual::before {
    content: '';
    position: absolute;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, var(--glow-pink) 0%, transparent 70%);
    filter: blur(40px);
    z-index: -1;
    animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.08); }
}

.product-svg {
    width: min(300px, 80vw);
    filter: drop-shadow(0 0 40px var(--glow-pink)) drop-shadow(0 0 80px var(--glow-cyan));
    animation: float 5s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-18px) rotate(2deg); }
}

/* ==================== BUTTONS ==================== */

.btn {
    padding: 0.875rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    cursor: pointer;
    border-radius: 999px;
    transition: all 0.3s var(--ease);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: linear-gradient(135deg, var(--neon-pink), var(--neon-red));
    color: white;
    box-shadow: 0 4px 24px var(--glow-pink);
}

.btn-primary:hover {
    box-shadow: 0 8px 32px var(--glow-pink);
    transform: translateY(-2px);
    filter: brightness(1.08);
}

.btn-secondary {
    background: transparent;
    border: 1.5px solid var(--border-accent);
    color: var(--neon-cyan);
}

.btn-secondary:hover {
    background: rgba(0, 229, 255, 0.08);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 24px var(--glow-cyan);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2.25rem !important;
    font-size: 1rem !important;
}

/* ==================== SECTIONS ==================== */

.page-header {
    padding: 5rem 0 3rem;
    text-align: center;
    position: relative;
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-pink), var(--neon-cyan));
    border-radius: 2px;
}

.page-header h1 {
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, #fff, var(--neon-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 2.5rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.features,
.colors-section,
.certifications,
.cta,
.faq-section,
.chat-section,
.contact-section,
.order-section,
.policies-section,
.disclaimers-section {
    padding: 4.5rem 0;
}

/* ==================== CARDS ==================== */

.features-grid,
.certs-grid,
.colors-showcase,
.faq-grid,
.color-options,
.contact-container {
    display: grid;
    gap: 1.5rem;
}

.features-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.certs-grid {
    grid-template-columns: repeat(4, 1fr);
}

.colors-showcase {
    grid-template-columns: repeat(4, 1fr);
}

.faq-grid {
    grid-template-columns: repeat(2, 1fr);
}

.color-options {
    grid-template-columns: repeat(2, 1fr);
}

.contact-container {
    grid-template-columns: 1.4fr 1fr;
    gap: 2rem;
}

.feature-card,
.cert-card,
.faq-item,
.contact-item,
.policy-card,
.disclaimer-card {
    background: var(--surface-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    transition: all 0.35s var(--ease);
}

.feature-card:hover,
.cert-card:hover {
    border-color: var(--border-accent);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(0, 229, 255, 0.1);
    transform: translateY(-6px);
    background: var(--surface-elevated);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    display: inline-flex;
    width: 52px;
    height: 52px;
    align-items: center;
    justify-content: center;
    background: rgba(0, 229, 255, 0.08);
    border-radius: 14px;
}

.feature-card h3,
.cert-card h3,
.faq-item h3 {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.feature-card p,
.cert-card p,
.faq-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.65;
}

.cert-icon {
    font-size: 1.75rem;
    color: var(--neon-green);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-inline: auto;
    background: rgba(0, 230, 118, 0.1);
    border-radius: 12px;
}

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

/* ==================== COLOR SHOWCASE ==================== */

.color-box {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.35s var(--ease);
    border: 2px solid transparent;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 1rem;
    font-weight: 600;
    font-size: 0.85rem;
    color: white;
    position: relative;
    overflow: hidden;
}

.color-box::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.5), transparent 50%);
    pointer-events: none;
}

.color-box:hover {
    transform: scale(1.04) translateY(-4px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.4);
    border-color: rgba(255,255,255,0.2);
}

.color-box.red { background: var(--neon-red); }
.color-box.cyan { background: var(--neon-cyan); color: #0a0a0a; }
.color-box.green { background: var(--neon-green); color: #0a0a0a; }
.color-box.yellow { background: var(--neon-yellow); color: #0a0a0a; }
.color-box.pink { background: var(--neon-pink); }
.color-box.violet { background: var(--neon-violet); }
.color-box.black { background: #1a1a1a; border-color: var(--border-accent); }
.color-box.white { background: #f0f0f0; color: #0a0a0a; border-color: var(--border-accent); }

/* ==================== FORMS ==================== */

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.form-input,
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--surface);
    border: 1.5px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.25s var(--ease);
}

.form-input:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--neon-cyan);
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
    background: var(--surface-elevated);
}

input[type="checkbox"],
input[type="radio"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--neon-cyan);
}

.checkbox-group,
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--surface);
    border: 1.5px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.25s var(--ease);
}

.radio-option:hover {
    border-color: var(--border-accent);
    background: var(--surface-elevated);
}

.radio-option input[type="radio"] {
    cursor: pointer;
}

.radio-option div {
    flex: 1;
}

.radio-option strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 0.15rem;
    font-weight: 600;
}

.radio-option p {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin: 0;
}

/* ==================== ORDER SECTION ==================== */

.order-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

.order-viewer {
    background: var(--surface-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 520px;
    position: relative;
    overflow: hidden;
}

.order-viewer::before {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--glow-pink), transparent 70%);
    filter: blur(50px);
    opacity: 0.5;
}

.order-viewer h3 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
    position: relative;
}

.product-preview {
    width: 260px;
    filter: drop-shadow(0 0 40px var(--glow-pink)) drop-shadow(0 0 60px var(--glow-cyan));
    position: relative;
    animation: float 5s ease-in-out infinite;
}

.viewer-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 1.5rem;
    text-align: center;
    position: relative;
}

.order-config {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.config-tabs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.tab-btn {
    padding: 0.75rem 0.5rem;
    background: var(--surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.8rem;
    font-family: inherit;
    transition: all 0.25s var(--ease);
}

.tab-btn:hover {
    border-color: var(--border-accent);
    color: var(--text-primary);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--neon-pink), var(--neon-red));
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 16px var(--glow-pink);
}

.tab-content {
    display: none;
    background: var(--surface-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.75rem;
}

.tab-content.active {
    display: block;
}

.tab-content h3 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
}

.color-opt {
    padding: 1rem;
    background: var(--surface);
    border: 1.5px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-align: center;
    transition: all 0.25s var(--ease);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.85rem;
}

.color-opt:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px var(--glow-cyan);
    transform: translateY(-2px);
}

.color-preview {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.15);
}

.upload-area {
    border: 2px dashed var(--border-accent);
    border-radius: var(--radius-sm);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s var(--ease);
    margin-bottom: 1rem;
    background: rgba(0, 229, 255, 0.02);
}

.upload-area:hover {
    border-color: var(--neon-cyan);
    background: rgba(0, 229, 255, 0.06);
}

.upload-area p {
    margin: 0.4rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.price-box {
    background: linear-gradient(135deg, rgba(255, 45, 149, 0.08), rgba(0, 229, 255, 0.08));
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.price-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.price-row.total {
    border-top: 1px solid var(--border-subtle);
    padding-top: 0.875rem;
    margin-top: 0.5rem;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--neon-cyan);
}

.info-box {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-top: 1rem;
}

.info-box.warning {
    background: rgba(255, 45, 85, 0.08);
    border: 1px solid rgba(255, 45, 85, 0.3);
    color: var(--text-secondary);
}

/* ==================== CONTACT ==================== */

.contact-form-box {
    background: var(--surface-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.contact-form-box h2 {
    color: var(--text-primary);
    font-weight: 700;
    margin-bottom: 1.5rem;
    font-size: 1.35rem;
}

.contact-info-box {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.contact-info-box h2 {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.35rem;
}

.contact-item {
    background: var(--surface-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    transition: all 0.3s var(--ease);
}

.contact-item:hover {
    border-color: var(--border-accent);
    transform: translateX(-4px);
}

.contact-icon {
    font-size: 1.5rem;
    min-width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 229, 255, 0.08);
    border-radius: 12px;
}

.contact-detail h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.contact-detail p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.contact-detail a {
    color: var(--neon-cyan);
    text-decoration: none;
    transition: opacity 0.2s;
}

.contact-detail a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* ==================== POLICIES & DISCLAIMER ==================== */

.policy-card,
.disclaimer-card {
    margin-bottom: 1.5rem;
    border-right: 3px solid var(--neon-pink);
    border-left: none;
}

.policy-card h2,
.disclaimer-card h2 {
    color: var(--text-primary);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.875rem;
}

.policy-card p,
.policy-card ul,
.policy-card li,
.disclaimer-card p,
.disclaimer-card ul,
.disclaimer-card li {
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.8;
    margin-bottom: 0.4rem;
}

.policy-card ul,
.disclaimer-card ul {
    margin-right: 1.25rem;
    list-style-position: outside;
}

.warning-card {
    background: rgba(255, 45, 85, 0.06);
    border: 1px solid rgba(255, 45, 85, 0.25);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    margin-bottom: 1.5rem;
}

.warning-card.critical h2 {
    color: var(--neon-red);
}

.acceptance-section {
    padding: 3rem 0;
}

.acceptance-box {
    background: linear-gradient(135deg, rgba(255, 45, 149, 0.06), rgba(0, 229, 255, 0.06));
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
}

.acceptance-box h3 {
    color: var(--text-primary);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.acceptance-box p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.update-section {
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ==================== CTA ==================== */

.cta {
    background: linear-gradient(135deg, rgba(255, 45, 149, 0.06), rgba(0, 229, 255, 0.06));
    padding: 5rem 0;
    text-align: center;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    position: relative;
}

.cta h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.cta p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==================== FOOTER ==================== */

.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-subtle);
    padding: 3.5rem 0 0;
    margin-top: 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.footer-section h4 {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.4rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s var(--ease);
}

.footer-section a:hover {
    color: var(--neon-cyan);
}

.footer-bottom {
    text-align: center;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ==================== RESPONSIVE ==================== */

@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-description {
        max-width: 100%;
        margin-inline: auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .order-container,
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .certs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .colors-showcase {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(11, 11, 18, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border-subtle);
        gap: 0.25rem;
    }
    
    .nav-links.open {
        display: flex;
    }
    
    .nav-links a {
        padding: 0.75rem 1rem;
        border-radius: var(--radius-sm);
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero {
        padding: 3rem 0 4rem;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .config-tabs {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid,
    .faq-grid,
    .certs-grid,
    .colors-showcase {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .cta-buttons,
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        justify-content: center;
    }
    
    .page-header {
        padding: 3.5rem 0 2.5rem;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-container {
        padding: 0 1rem;
    }
}

/* Logo image */
.logo-img, .logo img {
    height: 42px;
    width: auto;
    display: block;
}

.product-img {
    max-width: 320px;
    width: 100%;
    height: auto;
    animation: float 5s ease-in-out infinite;
}

/* Ensure links in logo don't break layout */
.navbar .logo {
    display: flex;
    align-items: center;
}

/* Harlow Solid Italic — local if installed; Great Vibes as web fallback */
@font-face {
    font-family: 'Harlow Solid';
    src: local('Harlow Solid Italic'), local('Harlow Solid'), local('HarlowSolid-Italic');
    font-style: italic;
    font-weight: 400;
    font-display: swap;
}

/* ===== Kat brand text (logo style) ===== */
.kat-brand {
    font-family: 'Harlow Solid', 'Great Vibes', cursive;
    font-style: italic;
    font-weight: 400;
    color: #FF2D95;
    letter-spacing: 0.02em;
    text-shadow: 0 0 20px rgba(255, 45, 149, 0.55), 0 0 40px rgba(255, 45, 149, 0.25);
}

.hero-title.kat-brand {
    font-size: clamp(3.5rem, 8vw, 5.5rem);
    line-height: 1.15;
    -webkit-text-fill-color: #FF2D95;
    background: none;
}

/* Partners logos strip */
.partners-section {
    padding: 4rem 0;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
    align-items: center;
    justify-items: center;
}

.partner-slot {
    width: 100%;
    max-width: 160px;
    aspect-ratio: 3/2;
    background: var(--surface-card);
    border: 1.5px dashed var(--border-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    transition: all 0.3s var(--ease);
    color: var(--text-muted);
    font-size: 0.8rem;
    text-align: center;
}

.partner-slot:hover {
    border-color: var(--border-accent);
    background: var(--surface-elevated);
}

.partner-slot img {
    max-width: 100%;
    max-height: 70px;
    object-fit: contain;
    filter: grayscale(0.3);
    opacity: 0.9;
    transition: all 0.3s var(--ease);
}

.partner-slot:hover img {
    filter: grayscale(0);
    opacity: 1;
}

/* ===== Trust bar under hero ===== */
.trust-bar {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

/* ===== Problem → Solution ===== */
.problem-section {
    padding: 4rem 0;
}

.problem-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1.25rem;
    align-items: stretch;
    max-width: 960px;
    margin: 0 auto;
}

.problem-card {
    background: var(--surface-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.75rem 1.5rem;
    transition: all 0.3s var(--ease);
}

.problem-card.problem {
    border-color: rgba(255, 45, 85, 0.25);
}

.problem-card.solution {
    border-color: rgba(0, 229, 255, 0.3);
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.25);
}

.problem-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 0.875rem;
}

.problem-card.problem .problem-label {
    background: rgba(255, 45, 85, 0.12);
    color: var(--neon-red);
}

.problem-card.solution .problem-label {
    background: rgba(0, 229, 255, 0.12);
    color: var(--neon-cyan);
}

.problem-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.problem-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.75;
}

.problem-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--neon-pink);
    opacity: 0.7;
}

.problem-result {
    text-align: center;
    max-width: 640px;
    margin: 2rem auto 0;
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, rgba(255,45,149,0.06), rgba(0,229,255,0.06));
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
}

.problem-result strong {
    color: var(--neon-cyan);
}

@media (max-width: 768px) {
    .problem-grid {
        grid-template-columns: 1fr;
    }
    .problem-arrow {
        transform: rotate(-90deg);
        padding: 0.25rem 0;
    }
}

/* ===== Product icons / symbols ===== */
.icons-section {
    padding: 4rem 0;
}

.icons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.25rem;
}

.icon-item {
    background: var(--surface-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.5rem 1rem;
    text-align: center;
    transition: all 0.3s var(--ease);
}

.icon-item:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 28px rgba(0,0,0,0.25);
}

.icon-symbol {
    width: 56px;
    height: 56px;
    margin: 0 auto 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    background: rgba(0, 229, 255, 0.08);
    border-radius: 14px;
    border: 1px solid rgba(0, 229, 255, 0.15);
}

.icon-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.icon-item p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0;
}

.icon-symbol.icon-svg {
    color: var(--neon-cyan);
    padding: 0.5rem;
}

.icon-symbol.icon-svg svg {
    width: 100%;
    height: 100%;
    display: block;
}

.icon-item:hover .icon-symbol.icon-svg {
    color: var(--neon-pink);
    background: rgba(255, 45, 149, 0.1);
    border-color: rgba(255, 45, 149, 0.25);
}


.icon-item {
    --icon-c: var(--neon-cyan);
}
.icon-symbol.icon-svg {
    color: var(--icon-c);
    background: color-mix(in srgb, var(--icon-c) 12%, transparent);
    border-color: color-mix(in srgb, var(--icon-c) 28%, transparent);
}
.icon-item:hover .icon-symbol.icon-svg {
    color: var(--icon-c);
    background: color-mix(in srgb, var(--icon-c) 18%, transparent);
    border-color: color-mix(in srgb, var(--icon-c) 45%, transparent);
    box-shadow: 0 0 20px color-mix(in srgb, var(--icon-c) 25%, transparent);
}
.icon-item h4 {
    margin-bottom: 0;
    font-size: 0.9rem;
}
.icons-grid {
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
}


/* === Requirements: clearer icons === */
.icon-symbol {
    width: 64px !important;
    height: 64px !important;
    font-size: 1.85rem !important;
}
.icon-symbol.icon-svg {
    padding: 0.65rem !important;
}
.icon-item h4 {
    font-size: 1rem !important;
    font-weight: 700 !important;
    margin-top: 0.35rem;
}
.icon-item {
    padding: 1.35rem 1rem 1.25rem !important;
}

/* Form groups polish */
.form-group {
    margin-bottom: 1.15rem;
}
.form-input, .form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--border-subtle);
    background: rgba(0,0,0,0.35);
    color: var(--text-primary);
}
.form-label, .form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.details-section-title {
    font-size: 1.05rem;
    color: var(--neon-cyan);
    margin: 1.5rem 0 0.75rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid rgba(0,229,255,0.25);
}
.tm-footer {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}