/* ==========================================================================
   Caveltech Landing Page - Styles
   Design: Modern Green + White, glassmorphism touches
   Approach: Mobile-first, acessível, performático
   ========================================================================== */

/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */
:root {
    /* Colors - Green + White palette */
    --primary: #16a34a;
    --primary-light: #22c55e;
    --primary-dark: #15803d;
    --primary-darker: #166534;
    --accent: #059669;
    --primary-glow: rgba(22, 163, 74, 0.15);

    /* Neutrals */
    --neutral-900: #0f172a;
    --neutral-800: #1e293b;
    --neutral-700: #334155;
    --neutral-600: #475569;
    --neutral-500: #64748b;
    --neutral-400: #94a3b8;
    --neutral-300: #cbd5e1;
    --neutral-200: #e2e8f0;
    --neutral-100: #f1f5f9;
    --neutral-50: #f8fafc;
    --white: #ffffff;

    /* Semantic */
    --text-primary: var(--neutral-900);
    --text-secondary: var(--neutral-600);
    --text-tertiary: var(--neutral-500);
    --bg-primary: var(--white);
    --bg-secondary: var(--neutral-50);
    --bg-tertiary: var(--neutral-100);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    /* 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;

    /* Layout */
    --container-max: 1280px;
    --container-padding: var(--space-4);
    --section-padding: var(--space-16);

    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows - Modern layered shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.06), 0 4px 10px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.08), 0 8px 16px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 40px rgba(22, 163, 74, 0.15);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-index */
    --z-header: 100;
    --z-modal: 200;
    --z-toast: 300;
    --z-float: 150;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
svg {
    display: block;
    max-width: 100%;
}

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

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

ul,
ol {
    list-style: none;
}

/* Focus Styles - Accessibility */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-4);
    padding: var(--space-2) var(--space-4);
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-md);
    z-index: var(--z-modal);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-4);
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-4);
    font-weight: 800;
    position: relative;
    display: inline-block;
}

.section-header .section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-full);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: var(--space-6) auto 0;
    line-height: 1.7;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-spring);
    white-space: nowrap;
    font-size: var(--font-size-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(22, 163, 74, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn-primary:hover {
    box-shadow: 0 8px 25px rgba(22, 163, 74, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary span,
.btn-primary svg {
    position: relative;
    z-index: 1;
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(22, 163, 74, 0.3);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.08), rgba(22, 163, 74, 0.04));
    border-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(22, 163, 74, 0.15);
}

.btn-secondary:active {
    background-color: rgba(22, 163, 74, 0.12);
    transform: translateY(-1px);
}

.btn-lg {
    padding: var(--space-5) var(--space-10);
    font-size: var(--font-size-lg);
}

.btn-full {
    width: 100%;
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: var(--z-header);
    transition: all var(--transition-base);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--neutral-200);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 88px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 180px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--text-primary);
}

/* Navigation */
.nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: var(--space-4);
    box-shadow: var(--shadow-lg);
}

.nav.active {
    display: block;
}

.nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.nav-link {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background-color: var(--neutral-50);
}

.nav-cta {
    margin-top: var(--space-4);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    padding: calc(88px + var(--space-20)) 0 var(--space-24);
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 100% 80% at 50% -30%, rgba(22, 163, 74, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 100% 0%, rgba(22, 163, 74, 0.08) 0%, transparent 50%),
        linear-gradient(180deg, var(--neutral-50) 0%, var(--white) 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 20%;
    right: -5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(22, 163, 74, 0.06) 0%, transparent 60%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: 10%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(22, 163, 74, 0.04) 0%, transparent 60%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {

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

    50% {
        transform: translateY(-30px) scale(1.05);
    }
}

.hero .container {
    width: 100%;
}

.hero-content {
    max-width: 760px;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.hero-title span {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-10);
    line-height: 1.7;
    max-width: 620px;
}

.hero-ctas {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    padding: var(--space-6) var(--space-8);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(22, 163, 74, 0.1);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.hero-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

.hero-features .icon {
    flex-shrink: 0;
    color: var(--primary);
    margin-top: 3px;
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
    position: relative;
}

.services-grid {
    display: grid;
    gap: var(--space-6);
}

.service-card {
    position: relative;
    padding: var(--space-8);
    background: var(--white);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-spring);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.service-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.02) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.service-card:hover {
    border-color: rgba(22, 163, 74, 0.2);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    transform: translateY(-8px);
}

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

.service-card:hover::after {
    opacity: 1;
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.08), rgba(22, 163, 74, 0.03));
    border: 1px solid rgba(22, 163, 74, 0.15);
    border-radius: var(--radius-xl);
    color: var(--primary);
    margin-bottom: var(--space-6);
    transition: all var(--transition-spring);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-color: var(--primary);
    color: var(--white);
    transform: scale(1.1) rotate(-3deg);
    box-shadow: 0 8px 20px rgba(22, 163, 74, 0.3);
}

.service-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-3);
    font-weight: 700;
}

.service-description {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: var(--font-size-base);
}

/* ==========================================================================
   Cases Section
   ========================================================================== */
.cases {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, var(--neutral-50) 0%, var(--white) 50%, var(--neutral-50) 100%);
    position: relative;
}

.cases::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--neutral-200), transparent);
}

.cases-grid {
    display: grid;
    gap: var(--space-6);
}

.case-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    border: 1px solid var(--neutral-200);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-spring);
    position: relative;
    overflow: hidden;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.03) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.case-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
    border-color: rgba(22, 163, 74, 0.15);
}

.case-card:hover::before {
    opacity: 1;
}

.case-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.12), rgba(22, 163, 74, 0.06));
    color: var(--primary-dark);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-5);
    border: 1px solid rgba(22, 163, 74, 0.2);
    position: relative;
    z-index: 1;
}

.case-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-6);
    font-weight: 700;
    line-height: 1.3;
    position: relative;
    z-index: 1;
}

.case-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    position: relative;
    z-index: 1;
}

.case-section {
    padding-left: var(--space-5);
    border-left: 3px solid var(--neutral-200);
    transition: all var(--transition-base);
}

.case-section:hover {
    border-left-color: var(--primary);
    padding-left: var(--space-6);
}

.case-label {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--primary);
    margin-bottom: var(--space-2);
}

.case-section p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ==========================================================================
   Process Section
   ========================================================================== */
.process {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
    position: relative;
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    left: 27px;
    top: 56px;
    bottom: 56px;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary) 50%, var(--primary-light) 100%);
    opacity: 0.2;
    border-radius: var(--radius-full);
}

.process-step {
    display: flex;
    gap: var(--space-6);
    position: relative;
}

.step-number {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    font-size: var(--font-size-lg);
    font-weight: 800;
    border-radius: var(--radius-full);
    box-shadow: 0 4px 15px rgba(22, 163, 74, 0.3), 0 0 0 4px rgba(22, 163, 74, 0.1);
    position: relative;
    z-index: 1;
    transition: all var(--transition-spring);
}

.process-step:hover .step-number {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(22, 163, 74, 0.4), 0 0 0 6px rgba(22, 163, 74, 0.15);
}

.step-content {
    flex: 1;
    padding: var(--space-5) var(--space-6);
    background: var(--white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--neutral-200);
    transition: all var(--transition-base);
}

.process-step:hover .step-content {
    border-color: rgba(22, 163, 74, 0.2);
    box-shadow: var(--shadow-md);
}

.step-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-2);
    font-weight: 700;
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: var(--font-size-sm);
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--neutral-50) 100%);
    position: relative;
}

.about-content {
    max-width: 800px;
    padding: var(--space-12);
    background: var(--white);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--neutral-200);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.about-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--accent));
}

.about-text .section-title {
    text-align: left;
    margin-bottom: var(--space-6);
}

.about-intro {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-6);
    line-height: 1.6;
}

.about-intro strong {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-5);
    line-height: 1.8;
}

.about-text p strong {
    color: var(--primary-dark);
    font-weight: 600;
}

.about-cta {
    margin-top: var(--space-10);
    padding-top: var(--space-8);
    border-top: 1px solid var(--neutral-200);
}

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

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.faq-item {
    background: var(--white);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-spring);
}

.faq-item:hover {
    border-color: var(--neutral-300);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.faq-item.active {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg), 0 0 0 3px rgba(22, 163, 74, 0.1);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-6);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--neutral-50);
}

.faq-item.active .faq-question {
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.05), transparent);
}

.faq-question span {
    flex: 1;
    font-size: var(--font-size-base);
}

.faq-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--neutral-100);
    border-radius: var(--radius-full);
    color: var(--text-tertiary);
    transition: all var(--transition-spring);
}

.faq-item:hover .faq-icon {
    background: rgba(22, 163, 74, 0.1);
    color: var(--primary);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
    background: var(--primary);
    color: var(--white);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--space-6) var(--space-6);
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: var(--font-size-base);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, var(--neutral-50) 0%, var(--white) 50%, var(--neutral-50) 100%);
    position: relative;
}

.contact-content {
    max-width: 640px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    padding: var(--space-10);
    background: var(--white);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--neutral-200);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--accent));
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.form-input {
    padding: var(--space-4) var(--space-5);
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--white);
    transition: all var(--transition-spring);
}

.form-input:hover {
    border-color: var(--neutral-300);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.1);
}

.form-input::placeholder {
    color: var(--neutral-400);
}

.form-textarea {
    resize: vertical;
    min-height: 140px;
}

.form-input.error {
    border-color: #dc2626;
    background: #fef2f2;
}

.form-error {
    font-size: var(--font-size-sm);
    color: #dc2626;
    min-height: 20px;
}

.contact-info {
    margin-top: var(--space-8);
    text-align: center;
}

.contact-alt {
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
    font-weight: 500;
}

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

.contact-channel {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    color: var(--primary);
    font-weight: 600;
    border-radius: var(--radius-xl);
    transition: all var(--transition-spring);
    border: 1px solid var(--neutral-200);
    background: var(--white);
}

.contact-channel:hover {
    background: linear-gradient(135deg, rgba(22, 163, 74, 0.08), rgba(22, 163, 74, 0.04));
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--neutral-900);
    color: var(--neutral-300);
}

.footer-content {
    display: grid;
    gap: var(--space-10);
    margin-bottom: var(--space-10);
}

.footer-brand .logo-text {
    color: var(--white);
    margin-bottom: var(--space-3);
    display: block;
}

.footer-logo {
    height: 64px;
    width: auto;
    object-fit: contain;
    margin-bottom: var(--space-4);
    filter: brightness(0) invert(1);
}

.footer-tagline {
    color: var(--neutral-400);
    font-size: var(--font-size-sm);
}

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

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-links a {
    color: var(--neutral-400);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--neutral-800);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--neutral-500);
}

/* ==========================================================================
   WhatsApp Float Button
   ========================================================================== */
.whatsapp-float {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #25d366, #128c7e);
    color: var(--white);
    border-radius: var(--radius-full);
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4), 0 0 0 0 rgba(37, 211, 102, 0.4);
    z-index: var(--z-float);
    transition: all var(--transition-spring);
    animation: whatsapp-pulse 2s infinite;
}

@keyframes whatsapp-pulse {

    0%,
    100% {
        box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4), 0 0 0 0 rgba(37, 211, 102, 0.4);
    }

    50% {
        box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4), 0 0 0 12px rgba(37, 211, 102, 0);
    }
}

.whatsapp-float:hover {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.5);
    animation: none;
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast {
    position: fixed;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: var(--space-4) var(--space-6);
    background: var(--neutral-900);
    color: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-toast);
    opacity: 0;
    transition: transform var(--transition-slow), opacity var(--transition-slow);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    background: var(--primary);
}

.toast.error {
    background: #dc2626;
}

/* ==========================================================================
   Responsive - Tablet (768px+)
   ========================================================================== */
@media (min-width: 768px) {
    :root {
        --container-padding: var(--space-8);
        --section-padding: var(--space-20);
    }

    .section-title {
        font-size: var(--font-size-4xl);
    }

    /* Hero */
    .hero {
        min-height: 80vh;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-ctas {
        flex-direction: row;
    }

    .hero-features {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .hero-features li {
        flex: 0 0 auto;
    }

    /* Services */
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Cases */
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cases-grid .case-card:last-child {
        grid-column: span 2;
    }

    /* Contact */
    .contact-channels {
        flex-direction: row;
        justify-content: center;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

/* ==========================================================================
   Responsive - Desktop (1024px+)
   ========================================================================== */
@media (min-width: 1024px) {
    :root {
        --section-padding: var(--space-24);
    }

    /* Header */
    .mobile-menu-btn {
        display: none;
    }

    .nav {
        display: flex;
        position: static;
        background: transparent;
        padding: 0;
        box-shadow: none;
        align-items: center;
        gap: var(--space-8);
    }

    .nav-list {
        flex-direction: row;
        gap: var(--space-1);
    }

    .nav-link {
        padding: var(--space-2) var(--space-3);
    }

    .nav-cta {
        margin-top: 0;
    }

    /* Hero */
    .hero {
        min-height: 85vh;
    }

    .hero-title {
        font-size: var(--font-size-5xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-xl);
    }

    .hero-features {
        display: inline-flex;
        flex-direction: column;
        gap: var(--space-4);
    }

    /* Services */
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .services-grid .service-card:nth-child(4),
    .services-grid .service-card:nth-child(5) {
        grid-column: span 1;
    }

    /* Cases */
    .cases-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .cases-grid .case-card:last-child {
        grid-column: span 1;
    }

    /* Process */
    .process-steps {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: var(--space-6);
    }

    .process-steps::before {
        display: none;
    }

    .process-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: var(--space-4);
    }

    .step-content {
        padding: var(--space-4);
        text-align: center;
    }

    .step-title {
        font-size: var(--font-size-base);
    }

    .step-description {
        font-size: var(--font-size-sm);
    }

    /* About */
    .about-content {
        margin: 0 auto;
    }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {

    .header,
    .whatsapp-float,
    .toast {
        display: none;
    }

    .hero {
        padding-top: var(--space-8);
    }

    body {
        font-size: 12pt;
    }
}