/* ========================================
   Nova Latitude — Professional Website
   Modern, responsive, SEO-optimized
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-900: #1e3a8a;

    --color-accent: #06b6d4;
    --color-accent-dark: #0891b2;

    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    --color-gray-950: #020617;

    --color-white: #ffffff;
    --color-success: #10b981;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-padding: 6rem 0;
    --container-max: 1200px;
    --container-padding: 1.5rem;

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

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

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

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

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

ul {
    list-style: none;
}

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

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

/* --- Section Styling --- */
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 3.5rem;
}

.section-tag {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--color-gray-900);
    line-height: 1.2;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-500);
    line-height: 1.6;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8125rem 1.75rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    gap: 0.5rem;
    line-height: 1;
}

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

.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn--outline {
    background: transparent;
    color: var(--color-gray-700);
    border-color: var(--color-gray-300);
}

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

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

/* ========================================
   HEADER / NAVIGATION
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: all var(--transition-base);
}

.header--scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.nav__logo {
    font-size: 1.375rem;
    font-weight: 800;
    text-decoration: none;
    display: flex;
    gap: 0;
}

.logo-nova {
    color: var(--color-gray-900);
}

.logo-latitude {
    color: var(--color-primary);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav__link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-600);
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav__link:hover {
    color: var(--color-gray-900);
    background: var(--color-gray-50);
}

.nav__link--cta {
    background: var(--color-primary);
    color: var(--color-white) !important;
    margin-left: 0.5rem;
}

.nav__link--cta:hover {
    background: var(--color-primary-dark) !important;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   HERO
   ======================================== */
.hero {
    position: relative;
    padding: 8rem 0 5rem;
    overflow: hidden;
    background: linear-gradient(180deg, var(--color-primary-50) 0%, var(--color-white) 100%);
}

.hero__bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.04) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero__container {
    position: relative;
}

.hero__content {
    max-width: 720px;
}

.hero__tag {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-primary);
    background: var(--color-primary-100);
    padding: 0.375rem 1rem;
    border-radius: 100px;
    margin-bottom: 1.5rem;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-gray-900);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero__description {
    font-size: 1.1875rem;
    color: var(--color-gray-500);
    line-height: 1.7;
    margin-bottom: 2rem;
    max-width: 580px;
}

.hero__actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
}

.hero__stats {
    display: flex;
    gap: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-gray-200);
}

.hero__stat {
    display: flex;
    flex-direction: column;
}

.hero__stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-gray-900);
}

.hero__stat-label {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    margin-top: 0.125rem;
}

/* ========================================
   MISSION
   ======================================== */
.mission {
    padding: var(--section-padding);
    background: var(--color-white);
}

.mission__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.mission__card {
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.mission__card:hover {
    border-color: var(--color-primary-100);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.mission__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: var(--color-primary-50);
    color: var(--color-primary);
    margin-bottom: 1.25rem;
}

.mission__card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 0.75rem;
}

.mission__card p {
    color: var(--color-gray-500);
    line-height: 1.6;
}

.values__list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.values__list li {
    color: var(--color-gray-600);
    padding-left: 1.25rem;
    position: relative;
    font-size: 0.9375rem;
}

.values__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
}

/* ========================================
   SERVICES
   ======================================== */
.services {
    padding: var(--section-padding);
    background: var(--color-gray-50);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.service-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-card:hover {
    border-color: var(--color-primary-100);
    box-shadow: var(--shadow-xl);
    transform: translateY(-3px);
}

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

.service-card--highlight {
    border-color: var(--color-primary-100);
    background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-white) 100%);
}

.service-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: var(--color-primary-50);
    color: var(--color-primary);
    margin-bottom: 1.25rem;
}

.service-card__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 0.625rem;
}

.service-card__desc {
    font-size: 0.9375rem;
    color: var(--color-gray-500);
    line-height: 1.6;
    margin-bottom: 1.25rem;
}

.service-card__list {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.service-card__list li {
    font-size: 0.8125rem;
    color: var(--color-gray-600);
    padding-left: 1rem;
    position: relative;
}

.service-card__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-primary-light);
}

/* ========================================
   WHY US
   ======================================== */
.why-us {
    padding: var(--section-padding);
    background: var(--color-white);
}

.why-us__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.why-us__card {
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.why-us__card:hover {
    border-color: var(--color-primary-100);
    box-shadow: var(--shadow-lg);
}

.why-us__number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary-100);
    font-family: var(--font-mono);
    margin-bottom: 0.75rem;
    line-height: 1;
}

.why-us__card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 0.5rem;
}

.why-us__card p {
    font-size: 0.9375rem;
    color: var(--color-gray-500);
    line-height: 1.6;
}

/* ========================================
   ENGAGEMENT MODELS
   ======================================== */
.engagement {
    padding: var(--section-padding);
    background: var(--color-gray-50);
}

.engagement__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.engagement__card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    text-align: center;
    transition: all var(--transition-base);
}

.engagement__card:hover {
    border-color: var(--color-primary-100);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.engagement__icon-wrap {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-primary-50);
    color: var(--color-primary);
    margin: 0 auto 1.25rem;
}

.engagement__card h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 0.5rem;
}

.engagement__card p {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    line-height: 1.6;
}

/* ========================================
   METHODOLOGY
   ======================================== */
.methodology {
    padding: var(--section-padding);
    background: var(--color-gray-900);
    color: var(--color-white);
}

.methodology .section-tag {
    color: var(--color-accent);
}

.methodology .section-title {
    color: var(--color-white);
}

.methodology .section-subtitle {
    color: var(--color-gray-400);
}

.methodology__timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.methodology__step {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all var(--transition-base);
}

.methodology__step:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.12);
}

.methodology__step-number {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 0.875rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.methodology__step-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 0.25rem;
}

.methodology__step-content p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    line-height: 1.5;
}

/* ========================================
   CASE STUDIES
   ======================================== */
.case-studies {
    padding: var(--section-padding);
    background: var(--color-white);
}

.cases__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.case-card {
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.case-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.case-card__header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--color-gray-900), var(--color-gray-800));
    color: var(--color-white);
}

.case-card__tag {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.case-card__header h3 {
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.3;
}

.case-card__body {
    padding: 1.5rem 2rem 2rem;
}

.case-card__section {
    margin-bottom: 1.25rem;
}

.case-card__section:last-of-type {
    margin-bottom: 1rem;
}

.case-card__section h4 {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-gray-400);
    margin-bottom: 0.375rem;
}

.case-card__section p {
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    line-height: 1.6;
}

.case-card__section ul {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.case-card__section ul li {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    padding-left: 1.125rem;
    position: relative;
}

.case-card__section ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-success);
}

.case-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-gray-100);
}

.case-card__tech span {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-50);
    padding: 0.25rem 0.625rem;
    border-radius: 100px;
    letter-spacing: 0.02em;
}

/* ========================================
   TESTIMONIALS
   ======================================== */
.testimonials {
    padding: var(--section-padding);
    background: var(--color-gray-50);
}

.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.testimonial-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    position: relative;
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
}

.testimonial-card__quote {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.testimonial-card p {
    font-size: 1.0625rem;
    color: var(--color-gray-600);
    line-height: 1.7;
    font-style: italic;
    margin-bottom: 1.5rem;
}

.testimonial-card__author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.testimonial-card__author strong {
    display: block;
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-gray-900);
    font-style: normal;
}

.testimonial-card__author span {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    font-style: normal;
}

/* ========================================
   TECH STACK
   ======================================== */
.tech-stack {
    padding: var(--section-padding);
    background: var(--color-white);
}

.tech__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.tech__category h3 {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-gray-400);
    margin-bottom: 0.75rem;
}

.tech__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech__tags span {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-gray-700);
    background: var(--color-gray-100);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-fast);
}

.tech__tags span:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-50);
}

/* ========================================
   TEAM
   ======================================== */
.team {
    padding: var(--section-padding);
    background: var(--color-gray-50);
}

.team__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
}

.team__role {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem 1.5rem;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    text-align: center;
    color: var(--color-primary);
    transition: all var(--transition-base);
}

.team__role:hover {
    border-color: var(--color-primary-100);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.team__role span {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-gray-700);
}

/* ========================================
   CONTACT
   ======================================== */
.contact {
    padding: var(--section-padding);
    background: var(--color-white);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact__info .section-tag {
    text-align: left;
}

.contact__info .section-title {
    text-align: left;
    margin-bottom: 1rem;
}

.contact__info > p {
    font-size: 1.0625rem;
    color: var(--color-gray-500);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact__detail {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-gray-600);
    font-size: 0.9375rem;
}

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

.contact__detail a {
    color: var(--color-gray-600);
}

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

.contact__next-steps {
    padding: 1.5rem;
    background: var(--color-primary-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-primary-100);
}

.contact__next-steps h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 0.625rem;
}

.contact__next-steps ul {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.contact__next-steps li {
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    padding-left: 1.25rem;
    position: relative;
}

.contact__next-steps li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
}

/* --- Contact Form --- */
.contact__form {
    background: var(--color-gray-50);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
}

.form__group {
    margin-bottom: 1.25rem;
}

.form__group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: 0.375rem;
}

.form__group input,
.form__group select,
.form__group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--color-gray-700);
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
}

.form__group input::placeholder,
.form__group textarea::placeholder {
    color: var(--color-gray-400);
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-100);
}

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

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-gray-950);
    color: var(--color-gray-400);
    padding: 4rem 0 2rem;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer__brand .nav__logo {
    display: inline-flex;
    margin-bottom: 1rem;
}

.footer__brand .logo-nova {
    color: var(--color-white);
}

.footer__brand p {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-gray-500);
}

.footer__links h4 {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-gray-300);
    margin-bottom: 1rem;
}

.footer__links ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer__links a {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
}

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

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 0.8125rem;
    color: var(--color-gray-600);
}

/* ========================================
   ANIMATIONS (scroll reveal)
   ======================================== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

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

/* Tablets */
@media (max-width: 1024px) {
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

    .hero__title {
        font-size: 2.75rem;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 4rem 0;
    }

    /* Navigation mobile */
    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        align-items: stretch;
        padding: 5rem 2rem 2rem;
        gap: 0.25rem;
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-slow);
        z-index: 1000;
    }

    .nav__menu.active {
        right: 0;
    }

    .nav__link {
        font-size: 1rem;
        padding: 0.75rem 1rem;
    }

    .nav__link--cta {
        margin-left: 0;
        margin-top: 0.5rem;
        text-align: center;
    }

    /* Overlay */
    .nav-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-base);
        z-index: 999;
    }

    .nav-overlay.active {
        opacity: 1;
        pointer-events: all;
    }

    /* Hero */
    .hero {
        padding: 7rem 0 3rem;
    }

    .hero__title {
        font-size: 2.25rem;
    }

    .hero__description {
        font-size: 1.0625rem;
    }

    .hero__stats {
        gap: 2rem;
    }

    .hero__stat-value {
        font-size: 1.5rem;
    }

    /* Sections */
    .section-title {
        font-size: 1.75rem;
    }

    .mission__grid {
        grid-template-columns: 1fr;
    }

    .services__grid {
        grid-template-columns: 1fr;
    }

    .why-us__grid {
        grid-template-columns: 1fr;
    }

    .engagement__grid {
        grid-template-columns: 1fr;
    }

    .cases__grid {
        grid-template-columns: 1fr;
    }

    .testimonials__grid {
        grid-template-columns: 1fr;
    }

    .contact__grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .methodology__timeline {
        grid-template-columns: 1fr;
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer__bottom {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 1.875rem;
    }

    .hero__actions {
        flex-direction: column;
    }

    .hero__stats {
        flex-direction: column;
        gap: 1rem;
    }

    .contact__form {
        padding: 1.5rem;
    }

    .case-card__body {
        padding: 1.25rem 1.5rem 1.5rem;
    }

    .case-card__header {
        padding: 1.25rem 1.5rem;
    }

    .tech__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

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