/* ========================================
   KVANT — Premium Design System
   ======================================== */

:root {
    /* Colors */
    --color-primary: #45a7b9;
    --color-primary-dark: #2d8a9a;
    --color-primary-light: #6bc4d4;
    
    --color-bg: #09090b;
    --color-bg-elevated: #18181b;
    --color-bg-subtle: #27272a;
    
    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-tertiary: #71717a;
    
    --color-border: #27272a;
    --color-border-subtle: #3f3f46;
    
    /* Typography */
    --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --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;
    
    /* Effects */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 60px rgba(69, 167, 185, 0.15);
}

/* ========================================
   Reset & Base
   ======================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* ========================================
   Layout
   ======================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ========================================
   Cursor Glow Effect
   ======================================== */

.cursor-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(69, 167, 185, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    opacity: 0;
}

.cursor-glow.active {
    opacity: 1;
}

/* ========================================
   Typography
   ======================================== */

.section-label {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

.btn--primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
}

.btn--secondary {
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn--secondary:hover {
    background: var(--color-bg-subtle);
    border-color: var(--color-border-subtle);
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

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

.btn--white {
    background: var(--color-text);
    color: var(--color-bg);
}

.btn--white:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
}

.btn--large {
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-base);
}

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

/* ========================================
   Header
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-4) 0;
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(9, 9, 11, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-xl);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.header__logo-icon {
    width: 32px;
    height: 32px;
}

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.header__nav a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

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

.header__mobile-trigger {
    display: none;
    flex-direction: column;
    gap: 6px;
    width: 24px;
    padding: 4px 0;
}

.header__mobile-trigger span {
    display: block;
    width: 100%;
    height: 1.5px;
    background: var(--color-text);
    transition: all var(--transition-base);
}

/* ========================================
   Mobile Menu
   ======================================== */

.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 320px;
    background: var(--color-bg-elevated);
    z-index: 200;
    padding: var(--space-20) var(--space-6) var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu__nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    margin-bottom: var(--space-8);
}

.mobile-menu__nav a {
    display: block;
    padding: var(--space-4) 0;
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    transition: color var(--transition-fast);
}

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

.mobile-menu__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 199;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.mobile-menu__overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Hero
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-32) 0 var(--space-20);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero__gradient {
    position: absolute;
    top: -20%;
    right: -10%;
    width: 60%;
    height: 80%;
    background: radial-gradient(ellipse, rgba(69, 167, 185, 0.12) 0%, transparent 60%);
    filter: blur(60px);
}

.hero__grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(69, 167, 185, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(69, 167, 185, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.hero__content {
    max-width: 560px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(69, 167, 185, 0.1);
    border: 1px solid rgba(69, 167, 185, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    margin-bottom: var(--space-6);
}

.hero__badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero__title {
    font-size: clamp(var(--font-size-4xl), 6vw, var(--font-size-6xl));
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-6);
}

.hero__title-highlight {
    color: var(--color-primary);
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-8);
}

.hero__cta {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.hero__metrics {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.hero__metric {
    text-align: left;
}

.hero__metric-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.hero__metric-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.hero__metric-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

/* Hero Phone */
.hero__visual {
    display: flex;
    justify-content: center;
}

.hero__phone {
    position: relative;
    width: 280px;
    height: 580px;
    background: var(--color-bg-elevated);
    border-radius: 40px;
    border: 1px solid var(--color-border);
    padding: var(--space-2);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.hero__phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 24px;
    background: var(--color-bg);
    border-radius: var(--radius-full);
    z-index: 10;
}

.hero__phone-screen {
    width: 100%;
    height: 100%;
    background: var(--color-bg);
    border-radius: 36px;
    overflow: hidden;
}

.hero__chat {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.hero__chat-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-12) var(--space-4) var(--space-4);
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
}

.hero__chat-avatar {
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-bg);
}

.hero__chat-info {
    display: flex;
    flex-direction: column;
}

.hero__chat-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.hero__chat-status {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
}

.hero__chat-messages {
    flex: 1;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    overflow-y: auto;
}

.hero__chat-message {
    max-width: 85%;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    animation: message-in 0.4s ease-out both;
}

.hero__chat-message:nth-child(1) { animation-delay: 0.2s; }
.hero__chat-message:nth-child(2) { animation-delay: 0.6s; }
.hero__chat-message:nth-child(3) { animation-delay: 1s; }
.hero__chat-message:nth-child(4) { animation-delay: 1.4s; }

@keyframes message-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero__chat-message--received {
    background: var(--color-bg-elevated);
    align-self: flex-start;
    border-bottom-left-radius: var(--radius-sm);
}

.hero__chat-message--sent {
    background: var(--color-primary);
    color: var(--color-bg);
    align-self: flex-end;
    border-bottom-right-radius: var(--radius-sm);
}

.hero__chat-message p {
    margin-bottom: var(--space-1);
}

.hero__chat-time {
    font-size: 10px;
    opacity: 0.6;
}

.hero__chat-typing {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    animation: message-in 0.4s ease-out 1.8s both;
}

.hero__chat-typing span {
    width: 4px;
    height: 4px;
    background: var(--color-text-tertiary);
    border-radius: 50%;
    animation: typing-dot 1.4s ease-in-out infinite;
}

.hero__chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.hero__chat-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-dot {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-4px); }
}

/* ========================================
   Solution Section
   ======================================== */

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

.solution__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-16);
}

.solution__problems {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-20);
}

.solution__problem {
    padding: var(--space-6);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.solution__problem:hover {
    border-color: var(--color-border-subtle);
    transform: translateY(-2px);
}

.solution__problem-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.solution__problem h3 {
    font-size: var(--font-size-base);
    font-weight: 500;
    margin-bottom: var(--space-2);
}

.solution__problem p {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.solution__answer {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    padding: var(--space-12);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.solution__answer-content h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-4);
}

.solution__answer-content > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.solution__features {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.solution__features li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

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

/* Solution Diagram */
.solution__diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
}

.solution__diagram-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-6);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.solution__diagram-node svg {
    color: var(--color-text-secondary);
}

.solution__diagram-node--ai {
    border-color: var(--color-primary);
    box-shadow: 0 0 20px rgba(69, 167, 185, 0.1);
}

.solution__diagram-node--ai svg {
    color: var(--color-primary);
}

.solution__diagram-node span {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.solution__diagram-line {
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, var(--color-border), var(--color-primary), var(--color-border));
}

/* ========================================
   Process Section
   ======================================== */

.process {
    padding: var(--space-24) 0;
    background: var(--color-bg-elevated);
}

.process__header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-16);
}

.process__steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    max-width: 700px;
    margin: 0 auto;
}

.process__step {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--space-6);
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.process__step-number {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.process__step-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin-bottom: var(--space-2);
}

.process__step-content p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

/* ========================================
   Features Section
   ======================================== */

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

.features__header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-16);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.features__card {
    padding: var(--space-8);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.features__card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.features__card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(69, 167, 185, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
}

.features__card h3 {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin-bottom: var(--space-2);
}

.features__card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ========================================
   Pricing Section
   ======================================== */

.pricing {
    padding: var(--space-24) 0;
    background: var(--color-bg-elevated);
}

.pricing__header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-16);
}

.pricing__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    align-items: start;
}

.pricing__card {
    position: relative;
    padding: var(--space-8);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.pricing__card:hover {
    border-color: var(--color-border-subtle);
}

.pricing__card--featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.pricing__card-badge {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: var(--color-bg);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
}

.pricing__card-header {
    margin-bottom: var(--space-6);
}

.pricing__plan-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.pricing__plan-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.pricing__card-price {
    display: flex;
    align-items: baseline;
    gap: var(--space-1);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-border);
}

.pricing__currency {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.pricing__amount {
    font-size: var(--font-size-4xl);
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--color-text);
}

.pricing__period {
    font-size: var(--font-size-base);
    color: var(--color-text-tertiary);
}

.pricing__features {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.pricing__features li {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.pricing__feature-value {
    font-weight: 500;
    color: var(--color-text);
}

/* ========================================
   Guarantee Section
   ======================================== */

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

.guarantee__content {
    display: flex;
    align-items: center;
    gap: var(--space-10);
    padding: var(--space-10);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    max-width: 800px;
    margin: 0 auto;
}

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

.guarantee__text h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.guarantee__text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3);
}

.guarantee__note {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

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

.cta {
    padding: var(--space-24) 0;
    background: var(--color-primary);
}

.cta__content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta__content h2 {
    font-size: var(--font-size-3xl);
    font-weight: 600;
    color: var(--color-bg);
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.cta__content p {
    font-size: var(--font-size-lg);
    color: rgba(9, 9, 11, 0.7);
    margin-bottom: var(--space-8);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.footer__main {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.footer__logo-icon {
    width: 28px;
    height: 28px;
}

.footer__brand p {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

.footer__column h4 {
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--space-4);
}

.footer__column a {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-2);
    transition: color var(--transition-fast);
}

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

.footer__social {
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
}

.footer__social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.footer__social a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.footer__bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer__bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* ========================================
   Animations
   ======================================== */

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero__content {
        max-width: 100%;
    }
    
    .hero__cta {
        justify-content: center;
    }
    
    .hero__metrics {
        justify-content: center;
    }
    
    .hero__visual {
        display: none;
    }
    
    .solution__problems {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solution__answer {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .solution__features {
        align-items: center;
    }
    
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing__grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .footer__main {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .footer__links {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer__social {
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .header__nav,
    .header__actions {
        display: none;
    }
    
    .header__mobile-trigger {
        display: flex;
    }
    
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .hero__cta {
        flex-direction: column;
    }
    
    .hero__metrics {
        flex-direction: column;
        gap: var(--space-4);
    }
    
    .hero__metric-divider {
        display: none;
    }
    
    .solution__problems {
        grid-template-columns: 1fr;
    }
    
    .solution__diagram {
        flex-direction: column;
    }
    
    .solution__diagram-line {
        width: 1px;
        height: 30px;
    }
    
    .process__step {
        grid-template-columns: 60px 1fr;
    }
    
    .features__grid {
        grid-template-columns: 1fr;
    }
    
    .guarantee__content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer__links {
        grid-template-columns: 1fr;
        text-align: center;
    }
}