/* ===========================================
   Kill Everything Digital - Design System
   BadMarketing-inspired dark theme
   =========================================== */

/* ========== CSS RESET ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ========== CSS VARIABLES ========== */
:root {
    /* Colors - Dark aggressive theme */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1a1a1a;
    --color-bg-card: #151515;

    /* Accent Colors */
    --color-accent: #c8ff00;
    --color-accent-hover: #a8d600;
    --color-accent-glow: rgba(200, 255, 0, 0.3);
    --color-danger: #ff3366;
    --color-warning: #ff9500;

    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #666666;

    /* Typography */
    --font-heading: 'Inter', 'Helvetica Neue', sans-serif;
    --font-body: 'Inter', 'Helvetica Neue', sans-serif;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;
    --text-6xl: 4.5rem;
    --text-hero: clamp(3rem, 10vw, 8rem);

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Shadows */
    --shadow-glow: 0 0 40px var(--color-accent-glow);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
}

/* ========== BASE STYLES ========== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
}

/* ========== TYPOGRAPHY ========== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--text-hero);
}

h2 {
    font-size: var(--text-5xl);
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

p {
    color: var(--color-text-secondary);
    max-width: 65ch;
}

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

.strikethrough {
    text-decoration: line-through;
    color: var(--color-text-muted);
}

/* ========== LAYOUT ========== */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

section {
    padding: var(--space-24) 0;
}

/* ========== NAVIGATION ========== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--space-4) 0;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-weight: 800;
    font-size: var(--text-xl);
    color: var(--color-text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-logo .kill {
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    gap: var(--space-8);
    list-style: none;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 700;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 60px var(--color-accent-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid var(--color-text-primary);
}

.btn-secondary:hover {
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
}

.btn-large {
    padding: var(--space-6) var(--space-12);
    font-size: var(--text-lg);
}

/* ========== HERO SECTION ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--space-20);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, var(--color-accent-glow) 0%, transparent 40%);
    animation: pulse 8s ease-in-out infinite;
    pointer-events: none;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.1);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    margin-bottom: var(--space-6);
}

.hero-tagline {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-10);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========== STATS SECTION ========== */
.stats {
    background: var(--color-bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
    text-align: center;
}

.stat-item {
    padding: var(--space-8);
}

.stat-number {
    font-size: var(--text-5xl);
    font-weight: 900;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ========== PROBLEM SECTION ========== */
.problem {
    background: var(--color-bg-primary);
}

.problem-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.problem-header h2 {
    margin-bottom: var(--space-4);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.problem-card {
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    transition: all var(--transition-base);
}

.problem-card:hover {
    border-color: var(--color-danger);
    transform: translateY(-4px);
}

.problem-icon {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-4);
}

.problem-card h4 {
    color: var(--color-danger);
    margin-bottom: var(--space-3);
}

/* ========== SOLUTION SECTION ========== */
.solution {
    background: var(--color-bg-secondary);
}

.solution-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.solution-card {
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.solution-card:hover::before {
    transform: scaleX(1);
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.solution-icon {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-4);
}

.solution-card h4 {
    color: var(--color-accent);
    margin-bottom: var(--space-3);
}

/* ========== SERVICES SECTION ========== */
.services {
    background: var(--color-bg-primary);
}

.services-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-8);
}

.service-card {
    background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-tertiary) 100%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
    border-color: var(--color-accent);
}

.service-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    background: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-6);
    font-size: var(--text-3xl);
}

.service-card h4 {
    margin-bottom: var(--space-4);
}

.service-card ul {
    list-style: none;
    text-align: left;
    margin-top: var(--space-6);
}

.service-card li {
    padding: var(--space-2) 0;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.service-card li::before {
    content: '✓';
    color: var(--color-accent);
    font-weight: bold;
}

/* ========== TESTIMONIALS ========== */
.testimonials {
    background: var(--color-bg-secondary);
}

.testimonials-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

.testimonial-card {
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
}

.testimonial-quote {
    font-size: var(--text-lg);
    font-style: italic;
    margin-bottom: var(--space-6);
    line-height: 1.7;
    color: var(--color-text-primary);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.testimonial-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: var(--color-bg-primary);
}

.testimonial-name {
    font-weight: 700;
}

.testimonial-role {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ========== CTA SECTION ========== */
.cta {
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-primary) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 60%);
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta h2 {
    margin-bottom: var(--space-6);
}

.cta p {
    margin: 0 auto var(--space-10);
    font-size: var(--text-xl);
}

.guarantee {
    display: inline-block;
    background: rgba(200, 255, 0, 0.1);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-full);
    padding: var(--space-3) var(--space-6);
    margin-top: var(--space-8);
    font-weight: 600;
    color: var(--color-accent);
}

/* ========== FOOTER ========== */
.footer {
    background: var(--color-bg-primary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--space-12) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-6);
}

.footer-logo {
    font-weight: 800;
    font-size: var(--text-lg);
    color: var(--color-text-primary);
}

.footer-logo .kill {
    color: var(--color-accent);
}

.footer-links {
    display: flex;
    gap: var(--space-6);
    list-style: none;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-copy {
    width: 100%;
    text-align: center;
    margin-top: var(--space-8);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    :root {
        --text-hero: clamp(2.5rem, 12vw, 4rem);
        --text-5xl: 2.5rem;
        --text-4xl: 2rem;
    }

    .nav-links {
        display: none;
    }

    section {
        padding: var(--space-16) 0;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

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

    .problem-grid,
    .solution-grid,
    .services-grid,
    .testimonial-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

.delay-3 {
    animation-delay: 0.3s;
}

.delay-4 {
    animation-delay: 0.4s;
}

/* ========== POC DEMO STYLES (INJECTED) ========== */

/* Live Demo Container */
.live-demo-container {
    background: rgba(20, 20, 20, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin: var(--space-8) auto;
    max-width: 900px;
    text-align: left;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.demo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: var(--space-4);
}

.demo-title {
    font-weight: 800;
    font-size: var(--text-lg);
    letter-spacing: 0.05em;
}

.demo-badge {
    background: rgba(255, 51, 102, 0.1);
    color: var(--color-danger);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 700;
    border: 1px solid rgba(255, 51, 102, 0.3);
    animation: blink 2s infinite;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.demo-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-6);
}

@media(max-width: 768px) {
    .demo-grid {
        grid-template-columns: 1fr;
    }
}

/* Activity Feed */
.demo-feed {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    height: 300px;
    display: flex;
    flex-direction: column;
}

.feed-header {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.feed-items {
    flex: 1;
    overflow-y: hidden;
    /* Auto-scroll handled by JS */
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.feed-item {
    display: flex;
    gap: var(--space-3);
    align-items: start;
    padding: var(--space-2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.f-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.f-content div:first-child {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

.f-content div:last-child {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.f-time {
    margin-left: auto;
    font-size: 10px;
    color: var(--color-text-muted);
}

/* Stats */
.demo-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.d-stat {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    text-align: center;
}

.highlight-stat {
    background: linear-gradient(135deg, rgba(200, 255, 0, 0.05) 0%, rgba(200, 255, 0, 0.01) 100%);
    border: 1px solid rgba(200, 255, 0, 0.1);
}

.d-label {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    margin-bottom: var(--space-1);
}

.d-value {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--color-text-primary);
}

.highlight-stat .d-value {
    color: var(--color-accent);
}

/* Calculator Styles */
.calculator {
    background: var(--color-bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: var(--space-16);
}

.calc-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.calc-wrapper {
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
}

@media(max-width: 768px) {
    .calc-wrapper {
        grid-template-columns: 1fr;
    }
}

.input-group {
    margin-bottom: var(--space-8);
}

.input-group label {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    font-weight: 600;
}

.input-hint {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-2);
}

input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 24px;
    width: 24px;
    border-radius: 50%;
    background: var(--color-accent);
    cursor: pointer;
    margin-top: -10px;
    box-shadow: 0 0 10px rgba(200, 255, 0, 0.5);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
}

.calc-results {
    display: grid;
    gap: var(--space-4);
}

.result-card {
    background: rgba(0, 0, 0, 0.2);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    display: grid;
    grid-template-columns: 40px 1fr auto;
    align-items: center;
    gap: var(--space-3);
}

.result-card.danger {
    border-left: 3px solid var(--color-danger);
    background: rgba(255, 51, 102, 0.05);
}

.result-card.success {
    border-left: 3px solid var(--color-accent);
    background: rgba(200, 255, 0, 0.05);
}

.result-icon {
    font-size: 1.5rem;
}

.result-label {
    font-weight: 600;
    color: var(--color-text-secondary);
}

.result-value {
    font-size: var(--text-xl);
    font-weight: 800;
}

.result-sub {
    grid-column: 2 / -1;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.danger .result-value {
    color: var(--color-danger);
}

.success .result-value {
    color: var(--color-accent);
}

/* ========== MOBILE OPTIMIZATION (Phase 9) ========== */
@media (max-width: 768px) {

    /* Global Spacing */
    section {
        padding: var(--space-12) 0;
    }

    .container {
        padding: 0 var(--space-6);
    }

    /* Hero Section */
    .hero h1 {
        font-size: clamp(2.5rem, 10vw, 4rem);
        line-height: 1.1;
    }

    .hero-tagline {
        font-size: var(--text-base);
        margin-bottom: var(--space-8);
    }

    /* Stack Grids */
    .services-grid,
    .solution-grid,
    .testimonial-grid,
    .demo-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    /* Live Demo Layout */
    .demo-grid {
        display: flex;
        flex-direction: column-reverse;
        /* Stats below, Feed on top (or vice versa based on pref, but standard is feed visible) */
        /* Actually, let's keep Feed FIRST if it's the visual hook, or Stats first if numbers matter more. 
           Standard 1-col grid behaves top-to-bottom. 
           Let's stick to standard grid flow: Feed (Left/Top) -> Stats (Right/Bottom) 
        */
        display: grid;
    }

    /* Calculator Mobile */
    .calc-wrapper {
        grid-template-columns: 1fr;
    }

    .calc-inputs {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        padding-right: 0;
        padding-bottom: var(--space-8);
    }

    /* Typography Adjustments */
    :root {
        --text-hero: 3rem;
        --text-3xl: 1.75rem;
        --text-2xl: 1.5rem;
    }

    .section-header h2 {
        font-size: var(--text-3xl);
    }
}