/* ============================================
   BetonBro - Landing Page Styles
   Design: Industrial meets Bio-tech
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Industrial concrete meets organic green */
    --color-primary: #22c55e;
    --color-primary-dark: #16a34a;
    --color-primary-light: #4ade80;
    --color-primary-glow: rgba(34, 197, 94, 0.4);
    
    --color-dark: #0a0f0d;
    --color-dark-light: #121a16;
    --color-dark-lighter: #1a251f;
    
    --color-text: #e2e8e4;
    --color-text-muted: #9ca3a0;
    --color-text-dim: #6b7370;
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-light: rgba(255, 255, 255, 0.12);
    
    --color-surface: #141c18;
    --color-surface-elevated: #1a251f;
    
    /* Typography */
    --font-display: 'Unbounded', sans-serif;
    --font-body: 'Onest', sans-serif;
    
    /* Spacing */
    --section-padding: 120px;
    --container-width: 1280px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--color-dark);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

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

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

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 15px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn--primary {
    background: var(--color-primary);
    color: var(--color-dark);
    box-shadow: 0 0 30px var(--color-primary-glow);
}

.btn--primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 40px var(--color-primary-glow);
}

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

.btn--outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn--sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn--lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn--full {
    width: 100%;
}

/* Section Styles */
.section-label {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    padding: 6px 12px;
    background: rgba(34, 197, 94, 0.1);
    border-radius: 100px;
    margin-bottom: 16px;
}

.section-header {
    margin-bottom: 64px;
}

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

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    color: var(--color-text);
    margin-bottom: 16px;
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    font-size: 12px;
    font-weight: 500;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    color: var(--color-text-muted);
}

.badge--glow {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.3);
    color: var(--color-primary);
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 15, 13, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo__icon {
    font-size: 28px;
}

.logo__text {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
}

.nav {
    display: flex;
    gap: 32px;
}

.nav__link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-text);
}

.header__right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header__phone {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.burger span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero__grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(34, 197, 94, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34, 197, 94, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero__glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
}

.hero__glow--1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.hero__glow--2 {
    width: 400px;
    height: 400px;
    background: #0ea5e9;
    bottom: -100px;
    left: -100px;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, 20px); }
}

.hero__container {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.hero__title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero__title .highlight {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0ea5e9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 18px;
    color: var(--color-text-muted);
    max-width: 520px;
    margin-bottom: 40px;
    line-height: 1.7;
}

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

/* Hero Animation */
.hero__visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.crack-demo {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.crack-demo__surface {
    position: relative;
    aspect-ratio: 1;
    background: linear-gradient(145deg, #2a3631 0%, #1a251f 100%);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.4),
        inset 0 1px 1px rgba(255, 255, 255, 0.05);
}

.crack-demo__surface::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(255,255,255,0.02) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.05'/%3E%3C/svg%3E");
}

.crack-demo__crack {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 0;
    background: linear-gradient(to bottom, transparent, #0a0f0d, transparent);
    animation: crack-appear 4s ease-in-out infinite;
    box-shadow: 
        0 0 10px rgba(0,0,0,0.8),
        inset 0 0 2px rgba(0,0,0,0.5);
}

.crack-demo__crack::before,
.crack-demo__crack::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 40%;
    background: inherit;
}

.crack-demo__crack::before {
    top: 20%;
    left: -15px;
    transform: rotate(-25deg);
}

.crack-demo__crack::after {
    bottom: 20%;
    right: -15px;
    transform: rotate(25deg);
}

.crack-demo__particles {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
}

.crack-demo__particles span {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0;
    animation: particle 4s ease-in-out infinite;
    box-shadow: 0 0 10px var(--color-primary);
}

.crack-demo__particles span:nth-child(1) { animation-delay: 1.5s; }
.crack-demo__particles span:nth-child(2) { animation-delay: 1.6s; top: 20px; left: 30px; }
.crack-demo__particles span:nth-child(3) { animation-delay: 1.7s; top: -20px; left: 40px; }
.crack-demo__particles span:nth-child(4) { animation-delay: 1.8s; top: 30px; left: -20px; }
.crack-demo__particles span:nth-child(5) { animation-delay: 1.9s; top: -30px; left: -30px; }
.crack-demo__particles span:nth-child(6) { animation-delay: 2.0s; top: 10px; left: 50px; }

.crack-demo__heal {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 0;
    background: linear-gradient(to bottom, transparent, var(--color-primary), transparent);
    animation: heal 4s ease-in-out infinite;
    border-radius: 4px;
    box-shadow: 0 0 20px var(--color-primary-glow);
}

@keyframes crack-appear {
    0%, 25% { height: 0; opacity: 0; }
    30%, 50% { height: 60%; opacity: 1; }
    75%, 100% { height: 60%; opacity: 0; }
}

@keyframes particle {
    0%, 35% { opacity: 0; transform: scale(0); }
    45% { opacity: 1; transform: scale(1); }
    55% { opacity: 1; transform: scale(1); }
    65%, 100% { opacity: 0; transform: scale(0); }
}

@keyframes heal {
    0%, 50% { height: 0; opacity: 0; }
    60% { height: 0; opacity: 1; }
    80% { height: 60%; opacity: 1; }
    90%, 100% { height: 60%; opacity: 0; }
}

.crack-demo__label {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 24px;
    padding: 16px;
    background: var(--color-surface);
    border-radius: var(--radius-md);
}

.crack-demo__step {
    font-size: 13px;
    color: var(--color-text-dim);
    transition: color var(--transition-fast);
}

.crack-demo__step.active {
    color: var(--color-primary);
}

.crack-demo__arrow {
    color: var(--color-text-dim);
    font-size: 12px;
}

/* Hero Scroll Indicator */
.hero__scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--color-text-dim);
    font-size: 12px;
}

.hero__scroll-icon {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-border-light);
    border-radius: 12px;
    position: relative;
}

.hero__scroll-dot {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 4px;
    animation: scroll-hint 1.5s ease-in-out infinite;
}

@keyframes scroll-hint {
    0%, 100% { top: 8px; opacity: 1; }
    50% { top: 20px; opacity: 0.5; }
}

/* ============================================
   Problems Section
   ============================================ */
.problems {
    padding: var(--section-padding) 0;
    background: var(--color-dark);
}

.problems__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.problem-card {
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

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

.problem-card__icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.problem-card__title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.problem-card__text {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.problems__stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    padding: 48px;
    background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-dark-lighter) 100%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

.stat {
    text-align: center;
}

.stat__number {
    display: block;
    font-family: var(--font-display);
    font-size: 56px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 12px;
}

.stat__text {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* ============================================
   Solution Section
   ============================================ */
.solution {
    padding: var(--section-padding) 0;
    background: var(--color-dark-light);
}

.solution__wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.solution__text {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    line-height: 1.7;
}

.solution__analogy {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: rgba(34, 197, 94, 0.05);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: var(--radius-lg);
    margin-top: 32px;
}

.solution__analogy-icon {
    font-size: 32px;
    flex-shrink: 0;
}

.solution__analogy-content h4 {
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.solution__analogy-content p {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* Product Card */
.product-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.product-card__visual {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 48px;
    background: linear-gradient(145deg, var(--color-dark-lighter) 0%, var(--color-surface) 100%);
}

.product-card__bag {
    position: relative;
    width: 180px;
    height: 220px;
    background: linear-gradient(145deg, #3a4741 0%, #2a3631 100%);
    border-radius: var(--radius-lg) var(--radius-lg) 4px 4px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

.product-card__bag::before {
    content: '';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 15px;
    background: linear-gradient(to bottom, #4a5a51, #3a4741);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.product-card__bag-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    text-shadow: 0 2px 10px var(--color-primary-glow);
}

.product-card__bag-weight {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 14px;
    color: var(--color-text-muted);
}

.product-card__specs {
    padding: 24px;
}

.spec {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.spec:last-child {
    border-bottom: none;
}

.spec__label {
    font-size: 14px;
    color: var(--color-text-dim);
}

.spec__value {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
}

/* ============================================
   How it Works Section
   ============================================ */
.how-it-works {
    padding: var(--section-padding) 0;
    background: var(--color-dark);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.step {
    flex: 1;
    text-align: center;
    padding: 32px 24px;
}

.step__number {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.step__icon {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 88px;
    height: 88px;
    margin: 0 auto 24px;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: 50%;
    color: var(--color-primary);
}

.step__title {
    font-size: 18px;
    margin-bottom: 12px;
}

.step__text {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.step__connector {
    flex: 0 0 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-border) 0%, var(--color-primary) 50%, var(--color-border) 100%);
    margin-top: 90px;
}

/* ============================================
   Benefits Section
   ============================================ */
.benefits {
    padding: var(--section-padding) 0;
    background: var(--color-dark-light);
}

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

.benefit-card {
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

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

.benefit-card--featured {
    background: linear-gradient(145deg, rgba(34, 197, 94, 0.1) 0%, var(--color-surface) 100%);
    border-color: rgba(34, 197, 94, 0.3);
}

.benefit-card__icon {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 56px;
    height: 56px;
    background: rgba(34, 197, 94, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.benefit-card__title {
    font-size: 18px;
    margin-bottom: 12px;
}

.benefit-card__text {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ============================================
   Applications Section
   ============================================ */
.applications {
    padding: var(--section-padding) 0;
    background: var(--color-dark);
}

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

.app-card {
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: default;
}

.app-card:hover {
    border-color: var(--color-primary);
    background: linear-gradient(145deg, rgba(34, 197, 94, 0.05) 0%, var(--color-surface) 100%);
}

.app-card__icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.app-card__title {
    font-size: 18px;
    margin-bottom: 12px;
}

.app-card__text {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ============================================
   Audience Section
   ============================================ */
.audience {
    padding: var(--section-padding) 0;
    background: var(--color-dark-light);
}

.audience__tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.audience__tab {
    padding: 12px 24px;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.audience__tab:hover {
    border-color: var(--color-border-light);
    color: var(--color-text);
}

.audience__tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-dark);
}

.audience__panel {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 48px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.audience__panel.active {
    display: grid;
}

.audience__panel-content h3 {
    font-size: 24px;
    margin-bottom: 24px;
}

.audience__list {
    list-style: none;
    margin-bottom: 32px;
}

.audience__list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 16px;
    font-size: 16px;
    color: var(--color-text-muted);
}

.audience__list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 600;
}

.audience__panel-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.audience__icon {
    font-size: 120px;
    opacity: 0.8;
}

/* ============================================
   Calculator Section
   ============================================ */
.calculator {
    padding: var(--section-padding) 0;
    background: var(--color-dark);
}

.calculator__wrapper {
    background: linear-gradient(145deg, var(--color-surface) 0%, var(--color-dark-lighter) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.calculator__header {
    padding: 48px 48px 32px;
}

.calculator__body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    padding: 0 48px 48px;
}

.calculator__form {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
}

.range-wrapper {
    display: flex;
    align-items: center;
    gap: 20px;
}

.range-input {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 8px;
    background: var(--color-dark);
    border-radius: 4px;
    outline: none;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 20px var(--color-primary-glow);
}

.range-input::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 20px var(--color-primary-glow);
}

.range-value {
    min-width: 80px;
    font-size: 18px;
    font-weight: 600;
    color: var(--color-primary);
    text-align: right;
}

.select-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.select-btn {
    padding: 10px 16px;
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.select-btn:hover {
    border-color: var(--color-border-light);
    color: var(--color-text);
}

.select-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-dark);
}

.calculator__result {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.result-card {
    padding: 24px;
    background: var(--color-dark);
    border-radius: var(--radius-lg);
}

.result-card h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text-muted);
}

.result-card--without {
    opacity: 0.7;
}

.result-card--with {
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 14px;
    color: var(--color-text-muted);
}

.result-item--total {
    padding-top: 12px;
    margin-top: 8px;
    border-top: 1px solid var(--color-border);
    font-weight: 600;
    font-size: 16px;
    color: var(--color-text);
}

.savings-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.2) 0%, rgba(34, 197, 94, 0.05) 100%);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: var(--radius-lg);
}

.savings-card__label {
    display: block;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.savings-card__value {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
}

.savings-card__percent {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    color: var(--color-primary);
}

/* ============================================
   Social Proof Section
   ============================================ */
.social-proof {
    padding: var(--section-padding) 0;
    background: var(--color-dark-light);
}

.social-proof__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-bottom: 64px;
}

.proof-stat {
    text-align: center;
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.proof-stat__number {
    display: block;
    font-family: var(--font-display);
    font-size: 40px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.proof-stat__text {
    font-size: 14px;
    color: var(--color-text-muted);
}

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

.testimonial {
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.testimonial__content {
    margin-bottom: 24px;
}

.testimonial__content p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text);
    font-style: italic;
}

.testimonial__author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.testimonial__avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(34, 197, 94, 0.1);
    border-radius: 50%;
    font-weight: 600;
    color: var(--color-primary);
}

.testimonial__name {
    display: block;
    font-weight: 600;
    font-size: 14px;
    color: var(--color-text);
}

.testimonial__role {
    font-size: 13px;
    color: var(--color-text-dim);
}

/* ============================================
   FAQ Section
   ============================================ */
.faq {
    padding: var(--section-padding) 0;
    background: var(--color-dark);
}

.faq__list {
    max-width: 800px;
    margin: 0 auto;
}

.faq__item {
    border-bottom: 1px solid var(--color-border);
}

.faq__question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 24px 0;
    font-family: var(--font-body);
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: color var(--transition-fast);
}

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

.faq__icon {
    flex-shrink: 0;
    color: var(--color-text-dim);
    transition: transform var(--transition-fast);
}

.faq__item.active .faq__icon {
    transform: rotate(180deg);
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq__item.active .faq__answer {
    max-height: 300px;
}

.faq__answer p {
    padding-bottom: 24px;
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ============================================
   Pricing Section
   ============================================ */
.pricing {
    padding: var(--section-padding) 0;
    background: var(--color-dark-light);
}

.pricing__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.price-card {
    position: relative;
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.price-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-border-light);
}

.price-card--featured {
    background: linear-gradient(145deg, rgba(34, 197, 94, 0.1) 0%, var(--color-surface) 100%);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.price-card--featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.price-card__tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: var(--color-primary);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-dark);
}

.price-card__header {
    margin-bottom: 24px;
}

.price-card__title {
    font-size: 20px;
    margin-bottom: 4px;
}

.price-card__weight {
    font-size: 14px;
    color: var(--color-text-dim);
}

.price-card__badge {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 8px;
    background: rgba(34, 197, 94, 0.1);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
}

.price-card__price {
    margin-bottom: 24px;
}

.price-card__amount {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text);
}

.price-card__currency {
    font-size: 20px;
    color: var(--color-text-muted);
}

.price-card__features {
    list-style: none;
    margin-bottom: 32px;
}

.price-card__features li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    font-size: 14px;
    color: var(--color-text-muted);
}

.price-card__features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.pricing__includes {
    text-align: center;
    padding: 32px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
}

.pricing__includes h4 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--color-text);
}

.pricing__includes-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
    font-size: 14px;
    color: var(--color-text-muted);
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
    padding: var(--section-padding) 0;
    background: var(--color-dark);
}

.cta__wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.cta__title {
    font-size: clamp(28px, 4vw, 40px);
    margin-bottom: 20px;
}

.cta__text {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    line-height: 1.7;
}

.cta__contacts {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cta__contact {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.cta__contact:hover {
    border-color: var(--color-primary);
    background: rgba(34, 197, 94, 0.05);
}

.cta__contact svg {
    flex-shrink: 0;
    color: var(--color-primary);
}

.cta__contact span {
    font-weight: 600;
    font-size: 15px;
}

.cta__contact small {
    display: block;
    font-size: 13px;
    color: var(--color-text-dim);
    margin-left: auto;
}

.cta__form-wrapper {
    padding: 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.cta__form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-input {
    width: 100%;
    padding: 16px;
    font-family: var(--font-body);
    font-size: 15px;
    color: var(--color-text);
    background: var(--color-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color var(--transition-fast);
}

.form-input::placeholder {
    color: var(--color-text-dim);
}

.form-input:focus {
    border-color: var(--color-primary);
}

textarea.form-input {
    resize: vertical;
    min-height: 100px;
}

.form-note {
    font-size: 12px;
    color: var(--color-text-dim);
    text-align: center;
}

.form-note a {
    color: var(--color-primary);
    text-decoration: underline;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 60px 0 40px;
    background: var(--color-dark-light);
    border-top: 1px solid var(--color-border);
}

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

.footer__desc {
    margin-top: 16px;
    font-size: 14px;
    color: var(--color-text-muted);
    max-width: 280px;
}

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

.footer__nav-col h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text);
}

.footer__nav-col a,
.footer__nav-col p {
    display: block;
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 12px;
    transition: color var(--transition-fast);
}

.footer__nav-col a:hover {
    color: var(--color-primary);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    font-size: 13px;
    color: var(--color-text-dim);
}

.footer__links {
    display: flex;
    gap: 24px;
}

.footer__links a:hover {
    color: var(--color-text);
}

/* ============================================
   WhatsApp Button
   ============================================ */
.whatsapp-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 900;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #25D366;
    border-radius: 50%;
    color: white;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    transition: all var(--transition-fast);
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

/* ============================================
   Modal
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.modal__content {
    position: relative;
    width: 100%;
    max-width: 440px;
    margin: 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transform: translateY(20px);
    transition: transform var(--transition-base);
}

.modal.active .modal__content {
    transform: translateY(0);
}

.modal__close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-dark);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal__close:hover {
    border-color: var(--color-text);
    color: var(--color-text);
}

.modal__body {
    padding: 48px 40px;
}

.modal__title {
    font-size: 24px;
    margin-bottom: 8px;
    text-align: center;
}

.modal__text {
    font-size: 14px;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: 32px;
}

.modal__form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .pricing__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .price-card--featured {
        transform: scale(1);
    }
    
    .price-card--featured:hover {
        transform: translateY(-8px);
    }
}

@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }
    
    .hero__container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    
    .hero__badges {
        justify-content: center;
    }
    
    .hero__subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero__actions {
        justify-content: center;
    }
    
    .hero__scroll {
        display: none;
    }
    
    .problems__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solution__wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .steps {
        flex-direction: column;
        align-items: center;
    }
    
    .step__connector {
        width: 2px;
        height: 40px;
        margin: 0;
        background: linear-gradient(180deg, var(--color-border) 0%, var(--color-primary) 50%, var(--color-border) 100%);
    }
    
    .benefits__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .applications__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .audience__panel {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .audience__panel-visual {
        order: -1;
    }
    
    .audience__icon {
        font-size: 80px;
    }
    
    .calculator__body {
        grid-template-columns: 1fr;
    }
    
    .social-proof__stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cta__wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer__top {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .header__phone {
        display: none;
    }
    
    .header__right .btn {
        display: none;
    }
    
    .burger {
        display: flex;
    }
    
    .hero__title {
        font-size: 32px;
    }
    
    .problems__grid {
        grid-template-columns: 1fr;
    }
    
    .problems__stats {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 32px;
    }
    
    .stat__number {
        font-size: 40px;
    }
    
    .benefits__grid {
        grid-template-columns: 1fr;
    }
    
    .applications__grid {
        grid-template-columns: 1fr;
    }
    
    .audience__tabs {
        flex-direction: column;
        align-items: stretch;
    }
    
    .pricing__grid {
        grid-template-columns: 1fr;
    }
    
    .social-proof__stats {
        grid-template-columns: 1fr;
    }
    
    .testimonials {
        grid-template-columns: 1fr;
    }
    
    .footer__nav {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .calculator__header,
    .calculator__body {
        padding: 24px;
    }
    
    .cta__form-wrapper {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero__badges {
        gap: 6px;
    }
    
    .badge {
        font-size: 11px;
        padding: 5px 10px;
    }
    
    .hero__actions {
        flex-direction: column;
        width: 100%;
    }
    
    .hero__actions .btn {
        width: 100%;
    }
    
    .crack-demo__surface {
        max-width: 280px;
        margin: 0 auto;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .audience__panel {
        padding: 24px;
    }
    
    .savings-card {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .savings-card__percent {
        font-size: 36px;
    }
    
    .pricing__includes-list {
        flex-direction: column;
        gap: 12px;
    }
}

/* ============================================
   Animations on scroll
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }