/* ============================================
   1. CSS CUSTOM PROPERTIES
   ============================================ */
:root {
    /* Colors */
    --color-primary-dark: #03254C;
    --color-primary: #1167B1;
    --color-primary-light: #187BCD;
    --color-primary-lighter: #D0EFFF;
    --color-primary-pale: #F0F8FF;
    --color-accent: #0EA5E9;
    --color-text-primary: #1E293B;
    --color-text-secondary: #475569;
    --color-bg-white: #FFFFFF;
    --color-bg-light: #F8FAFC;
    --color-border: #E2E8F0;
    --color-success: #16A34A;
    --color-error: #DC2626;

    /* Typography */
    --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
    --font-body: 'Source Sans 3', system-ui, -apple-system, sans-serif;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4rem;
    --space-9: 6rem;
    --space-10: 8rem;

    /* Layout */
    --container-max: 1200px;
    --container-padding: var(--space-5);
    --navbar-height: 72px;
    --navbar-height-scrolled: 60px;

    /* Borders */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(3, 37, 76, 0.08);
    --shadow-md: 0 4px 12px rgba(3, 37, 76, 0.10);
    --shadow-lg: 0 8px 30px rgba(3, 37, 76, 0.12);
    --shadow-xl: 0 16px 48px rgba(3, 37, 76, 0.15);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   2. CSS RESET
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
}

body {
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text-primary);
    background: var(--color-bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body.no-scroll {
    overflow: hidden;
}

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

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

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

ul {
    list-style: none;
}

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

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

address {
    font-style: normal;
}

/* ============================================
   3. SKIP LINK
   ============================================ */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-4);
    background: var(--color-primary);
    color: #fff;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    z-index: 10000;
    font-weight: 600;
    font-family: var(--font-heading);
}

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

/* ============================================
   4. FOCUS STYLES
   ============================================ */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
}

/* ============================================
   5. LAYOUT / CONTAINER
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
}

.section {
    padding-block: var(--space-9);
}

.section--alt {
    background-color: var(--color-bg-light);
}

/* ============================================
   6. TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--color-primary-dark);
    line-height: 1.2;
}

h1 { font-size: 3.5rem; font-weight: 800; line-height: 1.1; }
h2 { font-size: 2.5rem; font-weight: 700; }
h3 { font-size: 1.5rem; font-weight: 600; line-height: 1.3; }
h4 { font-size: 1.25rem; font-weight: 600; line-height: 1.4; }

p + p {
    margin-top: var(--space-4);
}

/* ============================================
   7. BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.75rem 2rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
}

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

.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--outline {
    background: transparent;
    color: #FFFFFF;
    border-color: #FFFFFF;
}

.btn--outline:hover {
    background: #FFFFFF;
    color: var(--color-primary-dark);
}

.btn--lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

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

.btn__loader {
    display: inline-flex;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   8. SECTION COMMON
   ============================================ */
.section__header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.section__label {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.section__title {
    margin-bottom: var(--space-4);
}

.section__divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    margin: 0 auto var(--space-5);
    border-radius: var(--radius-full);
}

.section__subtitle {
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-inline: auto;
    font-size: 1.125rem;
}

/* ============================================
   9. ANIMATIONS
   ============================================ */
.animate {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate.fade-in-up {
    transform: translateY(40px);
}

.animate.fade-in-left {
    transform: translateX(-40px);
}

.animate.fade-in-right {
    transform: translateX(40px);
}

.animate.is-visible {
    opacity: 1;
    transform: translate(0, 0);
}

/* Hero elements animate on load via CSS keyframes */
.hero .animate {
    animation-fill-mode: both;
}

.hero .animate.fade-in-up {
    opacity: 0;
    transform: none;
    animation: heroFadeInUp 0.8s ease forwards;
}

@keyframes heroFadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .animate {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
        animation: none !important;
    }
}

/* ============================================
   10. NAVBAR
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    height: var(--navbar-height);
    transition: all var(--transition-base);
    border-bottom: 1px solid transparent;
}

.navbar--scrolled {
    height: var(--navbar-height-scrolled);
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--color-border);
}

.navbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.navbar__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-primary-dark);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    z-index: 1001;
}

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

.navbar__logo-icon {
    flex-shrink: 0;
}

.navbar__list {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.navbar__link {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
    position: relative;
    padding: var(--space-1) 0;
}

.navbar__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.navbar__link:hover,
.navbar__link--active {
    color: var(--color-primary);
}

.navbar__link:hover::after,
.navbar__link--active::after {
    width: 100%;
}

.navbar__link--cta {
    background: var(--color-primary);
    color: #FFFFFF !important;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.navbar__link--cta::after {
    display: none;
}

.navbar__link--cta:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

/* Hamburger Toggle */
.navbar__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    z-index: 1001;
}

.navbar__toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary-dark);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* ============================================
   11. HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, #0A1628 100%);
    color: #FFFFFF;
    overflow: hidden;
}

.hero__particles {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 0%, rgba(3, 37, 76, 0.4) 100%);
}

.hero__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin-inline: auto;
    padding-block: var(--space-10);
}

.hero__tagline {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-primary-lighter);
    margin-bottom: var(--space-5);
}

.hero__heading {
    color: #FFFFFF;
    margin-bottom: var(--space-5);
}

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

.hero__subheading {
    font-size: 1.25rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin-inline: auto;
    margin-bottom: var(--space-7);
}

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

/* ============================================
   12. ABOUT
   ============================================ */
.about__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    align-items: start;
}

.about__text {
    color: var(--color-text-secondary);
    font-size: 1.0625rem;
    line-height: 1.8;
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
}

.stat-card {
    text-align: center;
    padding: var(--space-5);
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.stat-card:hover {
    border-color: var(--color-primary-lighter);
    box-shadow: var(--shadow-md);
}

.stat-card__number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-card__label {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   13. SERVICES
   ============================================ */
.services__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.service-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: var(--space-7);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

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

.service-card__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-pale);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    margin-bottom: var(--space-5);
    transition: all var(--transition-base);
}

.service-card:hover .service-card__icon {
    background: var(--color-primary);
    color: #FFFFFF;
}

.service-card__title {
    margin-bottom: var(--space-3);
}

.service-card__desc {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-5);
    font-size: 1rem;
    line-height: 1.7;
}

.service-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.service-card__tags li {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 500;
    padding: var(--space-1) var(--space-3);
    background: var(--color-primary-lighter);
    color: var(--color-primary-dark);
    border-radius: var(--radius-full);
}

/* ============================================
   14. WHY US
   ============================================ */
.why-us__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.why-us__card {
    position: relative;
    padding: var(--space-7) var(--space-6);
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

.why-us__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
    transition: height var(--transition-base);
}

.why-us__card:hover::before {
    height: 100%;
}

.why-us__card:hover {
    box-shadow: var(--shadow-md);
}

.why-us__card-number {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-primary-lighter);
    line-height: 1;
    margin-bottom: var(--space-4);
}

.why-us__card-title {
    margin-bottom: var(--space-3);
}

.why-us__card-desc {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* ============================================
   15. CASE STUDIES
   ============================================ */
.case-studies__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.case-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

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

.case-card__image {
    height: 200px;
    display: flex;
    align-items: flex-end;
    padding: var(--space-5);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #03254C, #1167B1);
}

.case-card__image img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.case-card__image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(3, 37, 76, 0.7), rgba(17, 103, 177, 0.5));
    z-index: 1;
}

.case-card__image--2 .case-card__image-overlay {
    background: linear-gradient(135deg, rgba(17, 103, 177, 0.7), rgba(24, 123, 205, 0.5));
}

.case-card__image--3 .case-card__image-overlay {
    background: linear-gradient(135deg, rgba(24, 123, 205, 0.7), rgba(14, 165, 233, 0.5));
}

.case-card__image-label {
    position: relative;
    z-index: 2;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.15);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    backdrop-filter: blur(4px);
}

.case-card__body {
    padding: var(--space-6);
}

.case-card__title {
    margin-bottom: var(--space-3);
}

.case-card__desc {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: var(--space-5);
}

.case-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.case-card__tags span {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 500;
    padding: var(--space-1) var(--space-3);
    background: var(--color-primary-pale);
    color: var(--color-primary);
    border-radius: var(--radius-full);
}

/* ============================================
   16. TEAM
   ============================================ */
.team__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.team-card {
    text-align: center;
    padding: var(--space-7) var(--space-5);
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.team-card__avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    transition: transform var(--transition-base);
}

.team-card:hover .team-card__avatar {
    transform: scale(1.08);
}

.team-card__avatar span {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: #FFFFFF;
}

.team-card__name {
    margin-bottom: var(--space-1);
}

.team-card__role {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.team-card__bio {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: var(--space-5);
}

.team-card__social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary-pale);
    color: var(--color-primary);
    transition: all var(--transition-fast);
}

.team-card__social a:hover {
    background: var(--color-primary);
    color: #FFFFFF;
}

.team-card__social a svg {
    width: 18px;
    height: 18px;
}

/* ============================================
   17. TESTIMONIALS
   ============================================ */
.testimonials__carousel {
    max-width: 800px;
    margin-inline: auto;
    position: relative;
    overflow: hidden;
}

.testimonials__track {
    display: flex;
    transition: transform var(--transition-slow);
}

.testimonial-card {
    min-width: 100%;
    flex-shrink: 0;
    padding: var(--space-8) var(--space-6);
    text-align: center;
}

.testimonial-card__quote-icon {
    margin-bottom: var(--space-4);
}

.testimonial-card__quote-icon svg {
    margin-inline: auto;
    color: var(--color-primary);
}

.testimonial-card__text {
    font-size: 1.1875rem;
    line-height: 1.8;
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
    font-style: italic;
}

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

.testimonial-card__avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.testimonial-card__avatar span {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 700;
    color: #FFFFFF;
}

.testimonial-card__name {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-primary-dark);
    font-style: normal;
    display: block;
}

.testimonial-card__company {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.testimonials__controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-5);
    margin-top: var(--space-4);
}

.testimonials__btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    transition: all var(--transition-fast);
}

.testimonials__btn:hover {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: #FFFFFF;
}

.testimonials__dots {
    display: flex;
    gap: var(--space-2);
}

.testimonials__dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-border);
    transition: all var(--transition-fast);
    border: none;
}

.testimonials__dot--active {
    background: var(--color-primary);
    transform: scale(1.2);
}

/* ============================================
   18. CONTACT
   ============================================ */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

.contact__info-title {
    margin-bottom: var(--space-4);
}

.contact__info-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    line-height: 1.7;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

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

.contact__detail-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    margin-top: 2px;
}

.contact__detail-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-1);
}

.contact__detail-value {
    font-size: 1rem;
    color: var(--color-text-primary);
}

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

/* Form */
.contact__form {
    background: var(--color-bg-light);
    padding: var(--space-7);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.form-required {
    color: var(--color-error);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--color-text-primary);
    background: var(--color-bg-white);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder {
    color: #94A3B8;
}

.form-input:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(17, 103, 177, 0.15);
}

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

.form-input--error:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-error {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-error);
    margin-top: var(--space-1);
    min-height: 1.2em;
}

.form-success {
    margin-top: var(--space-5);
    padding: var(--space-4);
    background: #F0FDF4;
    color: var(--color-success);
    border: 1px solid #BBF7D0;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-align: center;
}

.form-error-msg {
    margin-top: var(--space-5);
    padding: var(--space-4);
    background: #FEF2F2;
    color: var(--color-error);
    border: 1px solid #FECACA;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-align: center;
}

/* ============================================
   19. FOOTER
   ============================================ */
.footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.7);
    padding-block: var(--space-9) var(--space-6);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-7);
    margin-bottom: var(--space-7);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.footer__logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: #FFFFFF;
}

.footer__logo:hover .footer__logo-text {
    color: var(--color-primary-lighter);
}

.footer__tagline {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer__heading {
    font-size: 1rem;
    font-weight: 600;
    color: #FFFFFF;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer__list li {
    margin-bottom: var(--space-2);
    font-size: 0.9375rem;
}

.footer__list a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer__list a:hover {
    color: #FFFFFF;
}

.footer__social-links {
    display: flex;
    gap: var(--space-3);
}

.footer__social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-fast);
}

.footer__social-links a:hover {
    background: var(--color-primary);
    color: #FFFFFF;
}

.footer__social-links a svg {
    width: 20px;
    height: 20px;
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-6);
    text-align: center;
    font-size: 0.875rem;
}

/* ============================================
   20. BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: all var(--transition-base);
    opacity: 0;
    visibility: hidden;
}

.back-to-top:not([hidden]) {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* ============================================
   21. MEDIA QUERIES
   ============================================ */

/* ---- Tablet: 768px+ ---- */
@media (min-width: 768px) {
    .about__grid {
        grid-template-columns: 3fr 2fr;
    }

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

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

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

    .team__grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

/* ---- Desktop: 1024px+ ---- */
@media (min-width: 1024px) {
    .why-us__grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .case-studies__grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

/* ---- Large: 1280px+ ---- */
@media (min-width: 1280px) {
    :root {
        --container-padding: var(--space-8);
    }
}

/* ---- Mobile: < 768px ---- */
@media (max-width: 767px) {
    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .section {
        padding-block: var(--space-7);
    }

    /* Navbar mobile */
    .navbar__toggle {
        display: flex;
    }

    .navbar__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-bg-white);
        box-shadow: var(--shadow-xl);
        padding: calc(var(--navbar-height) + var(--space-6)) var(--space-6) var(--space-6);
        transition: right var(--transition-base);
        z-index: 1000;
    }

    .navbar__menu--open {
        right: 0;
    }

    .navbar__list {
        flex-direction: column;
        gap: var(--space-4);
        align-items: stretch;
    }

    .navbar__link {
        display: block;
        padding: var(--space-2) 0;
        font-size: 1.0625rem;
    }

    .navbar__link--cta {
        text-align: center;
        margin-top: var(--space-2);
    }

    /* Hamburger animation when open */
    .navbar__toggle[aria-expanded="true"] .navbar__toggle-bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .navbar__toggle[aria-expanded="true"] .navbar__toggle-bar:nth-child(2) {
        opacity: 0;
    }

    .navbar__toggle[aria-expanded="true"] .navbar__toggle-bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* Hero mobile */
    .hero__content {
        padding-block: var(--space-8);
    }

    .hero__subheading {
        font-size: 1.0625rem;
    }

    .hero__cta-group {
        flex-direction: column;
        align-items: center;
    }

    .hero__cta-group .btn {
        width: 100%;
        max-width: 280px;
    }

    /* Stats mobile */
    .stat-card__number {
        font-size: 2rem;
    }

    /* Contact form mobile */
    .contact__form {
        padding: var(--space-5);
    }

    /* Why Us cards */
    .why-us__card-number {
        font-size: 2.5rem;
    }

    /* Testimonials */
    .testimonial-card {
        padding: var(--space-6) var(--space-4);
    }

    .testimonial-card__text {
        font-size: 1rem;
    }
}