/* ========================================
   Corun Power - Electric Motorcycle Company
   Stylesheet
   ======================================== */

/* CSS Variables */
:root {
    --color-primary: #037D70;
    --color-primary-dark: #025d54;
    --color-primary-light: #04a08f;
    --color-secondary: #FFFFFF;
    --color-accent: #1A1A2E;
    --color-accent-light: #2d2d44;
    --color-gray-100: #F8F9FA;
    --color-gray-200: #E9ECEF;
    --color-gray-300: #DEE2E6;
    --color-gray-400: #CED4DA;
    --color-gray-500: #ADB5BD;
    --color-gray-600: #6C757D;
    --color-gray-700: #495057;
    --color-gray-800: #343A40;
    --color-gray-900: #212529;
    
    --font-primary: 'Prompt', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.25rem;
    --fs-xl: 1.5rem;
    --fs-2xl: 2rem;
    --fs-3xl: 2.5rem;
    --fs-4xl: 3rem;
    --fs-5xl: 3.5rem;
    
    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    
    --lh-tight: 1.2;
    --lh-normal: 1.5;
    --lh-relaxed: 1.75;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    --header-height: 80px;
    --container-max: 1200px;
}

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

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

body {
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    font-weight: var(--fw-regular);
    line-height: var(--lh-normal);
    color: var(--color-gray-800);
    background-color: var(--color-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

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

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

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

/* Section */
.section {
    padding: var(--spacing-4xl) 0;
}

.section--alt {
    background-color: var(--color-gray-100);
}

.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section__subtitle {
    display: inline-block;
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.section__title {
    font-size: var(--fs-3xl);
    font-weight: var(--fw-bold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    line-height: var(--lh-tight);
}

.section__description {
    font-size: var(--fs-md);
    color: var(--color-gray-600);
    line-height: var(--lh-relaxed);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--fs-base);
    font-weight: var(--fw-medium);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-secondary);
    box-shadow: 0 4px 14px 0 rgba(3, 125, 112, 0.4);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(3, 125, 112, 0.5);
}

.btn--outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn--outline:hover {
    background: var(--color-primary);
    color: var(--color-secondary);
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all var(--transition-base);
}

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

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

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: var(--fw-bold);
    font-size: var(--fs-lg);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-text {
    color: var(--color-accent);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav__link {
    position: relative;
    font-weight: var(--fw-medium);
    color: var(--color-gray-700);
    padding: var(--spacing-sm) 0;
}

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

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

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

.nav__toggle,
.nav__close {
    display: none;
    color: var(--color-accent);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    overflow: hidden;
}

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

.hero__bg-image {
    position: absolute;
    inset: 0;
    background-image: url('https://images.unsplash.com/photo-1558618666-fcd25c85cd64?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero__bg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(26, 26, 46, 0.85) 0%,
        rgba(26, 26, 46, 0.7) 40%,
        rgba(3, 125, 112, 0.6) 100%
    );
}

.hero__pattern {
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(135deg, rgba(3, 125, 112, 0.1) 0%, transparent 50%),
        linear-gradient(225deg, rgba(26, 26, 46, 0.05) 0%, transparent 50%);
}

.hero__pattern::before {
    content: '';
    position: absolute;
    top: 10%;
    right: 5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(3, 125, 112, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero__pattern::after {
    content: '';
    position: absolute;
    bottom: 20%;
    left: 10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero__content {
    max-width: 600px;
}

.hero__subtitle {
    display: inline-block;
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-primary-light);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(4px);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero__title {
    font-size: var(--fs-5xl);
    font-weight: var(--fw-bold);
    color: var(--color-secondary);
    line-height: var(--lh-tight);
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, #4fd1c5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__description {
    font-size: var(--fs-lg);
    color: rgba(255, 255, 255, 0.85);
    line-height: var(--lh-relaxed);
    margin-bottom: var(--spacing-xl);
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.2);
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero__buttons .btn--outline {
    color: var(--color-secondary);
    border-color: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(4px);
}

.hero__buttons .btn--outline:hover {
    background: var(--color-secondary);
    color: var(--color-primary);
    border-color: var(--color-secondary);
}

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

.hero__image-wrapper {
    position: relative;
    width: 100%;
    max-width: 450px;
}

.hero__illustration {
    width: 100%;
    height: auto;
    color: rgba(255, 255, 255, 0.8);
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

.hero__scroll {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--fs-sm);
    animation: bounce 2s infinite;
    transition: color var(--transition-fast);
}

.scroll-indicator:hover {
    color: var(--color-secondary);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* About Section */
.about__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.about__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.about__card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.about__card-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(3, 125, 112, 0.1) 0%, rgba(3, 125, 112, 0.05) 100%);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
}

.about__card-content h3 {
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.about__card-content p {
    font-size: var(--fs-base);
    color: var(--color-gray-800);
    font-weight: var(--fw-medium);
}

.about__card-value {
    font-size: var(--fs-lg) !important;
    font-weight: var(--fw-semibold) !important;
    color: var(--color-primary) !important;
    font-family: 'Inter', monospace;
    letter-spacing: 0.05em;
}

.about__vision {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.about__vision-card {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-xl);
    color: var(--color-secondary);
}

.about__vision-card h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--fs-lg);
    font-weight: var(--fw-semibold);
    margin-bottom: var(--spacing-md);
}

.about__vision-card p {
    font-size: var(--fs-base);
    line-height: var(--lh-relaxed);
    opacity: 0.95;
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    padding: var(--spacing-2xl);
    background: var(--color-accent);
    border-radius: var(--radius-2xl);
}

.stat {
    text-align: center;
    color: var(--color-secondary);
}

.stat__number {
    display: block;
    font-size: var(--fs-4xl);
    font-weight: var(--fw-bold);
    color: var(--color-primary-light);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat__suffix {
    font-size: var(--fs-2xl);
    font-weight: var(--fw-bold);
    color: var(--color-primary-light);
}

.stat__label {
    display: block;
    font-size: var(--fs-sm);
    color: var(--color-gray-400);
}

/* Services Section */
.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.service-card {
    position: relative;
    padding: var(--spacing-2xl);
    background: var(--color-secondary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

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

.service-card--featured {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    color: var(--color-secondary);
}

.service-card--featured::before {
    background: linear-gradient(90deg, var(--color-primary-light) 0%, #fff 100%);
}

.service-card__badge {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-primary);
    color: var(--color-secondary);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    border-radius: var(--radius-full);
}

.service-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: rgba(3, 125, 112, 0.1);
    border-radius: var(--radius-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.service-card--featured .service-card__icon {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-primary-light);
}

.service-card__title {
    font-size: var(--fs-xl);
    font-weight: var(--fw-semibold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.service-card--featured .service-card__title {
    color: var(--color-secondary);
}

.service-card__description {
    font-size: var(--fs-base);
    color: var(--color-gray-600);
    line-height: var(--lh-relaxed);
    margin-bottom: var(--spacing-lg);
}

.service-card--featured .service-card__description {
    color: var(--color-gray-300);
}

.service-card__features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.service-card__features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--fs-sm);
    color: var(--color-gray-700);
}

.service-card--featured .service-card__features li {
    color: var(--color-gray-300);
}

.service-card__features li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

.service-card--featured .service-card__features li::before {
    background: var(--color-primary-light);
}

/* Contact Section */
.contact__content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-3xl);
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact__card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-gray-100);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.contact__card:hover {
    background: var(--color-secondary);
    box-shadow: var(--shadow-md);
}

.contact__card-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    color: var(--color-secondary);
}

.contact__card-content h3 {
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.contact__card-content p {
    font-size: var(--fs-base);
    color: var(--color-gray-800);
    line-height: var(--lh-relaxed);
}

.contact__card-content a {
    color: var(--color-primary);
    font-weight: var(--fw-medium);
}

.contact__card-content a:hover {
    text-decoration: underline;
}

.contact__map {
    margin-top: var(--spacing-md);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.contact__form-wrapper {
    background: var(--color-secondary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}

.contact__form-title {
    font-size: var(--fs-xl);
    font-weight: var(--fw-semibold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-xl);
}

.form__group {
    margin-bottom: var(--spacing-lg);
}

.form__label {
    display: block;
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-sm);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--fs-base);
    color: var(--color-gray-800);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    background: var(--color-secondary);
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(3, 125, 112, 0.1);
}

.form__input::placeholder,
.form__textarea::placeholder {
    color: var(--color-gray-400);
}

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

.form__error {
    display: block;
    font-size: var(--fs-sm);
    color: #dc3545;
    margin-top: var(--spacing-xs);
    min-height: 1.25rem;
}

.form__input.error,
.form__textarea.error {
    border-color: #dc3545;
}

/* Footer */
.footer {
    background: var(--color-accent);
    color: var(--color-secondary);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer__content {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary-light);
    font-weight: var(--fw-bold);
    font-size: var(--fs-lg);
    margin-bottom: var(--spacing-md);
}

.footer__logo .logo-text {
    color: var(--color-secondary);
}

.footer__tagline {
    font-size: var(--fs-sm);
    color: var(--color-gray-400);
    line-height: var(--lh-relaxed);
}

.footer__links h4,
.footer__contact h4,
.footer__social h4 {
    font-size: var(--fs-base);
    font-weight: var(--fw-semibold);
    margin-bottom: var(--spacing-lg);
    color: var(--color-secondary);
}

.footer__links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__links a {
    font-size: var(--fs-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

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

.footer__contact ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer__contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: var(--fs-sm);
    color: var(--color-gray-400);
}

.footer__contact svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--color-primary-light);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-gray-400);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--color-secondary);
    transform: translateY(-2px);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    font-size: var(--fs-sm);
    color: var(--color-gray-500);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-secondary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* Animations */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

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

.animate-fade-left {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.6s ease-out;
}

.animate-fade-left.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Animation delays */
.animate-fade-up:nth-child(1) { transition-delay: 0.1s; }
.animate-fade-up:nth-child(2) { transition-delay: 0.2s; }
.animate-fade-up:nth-child(3) { transition-delay: 0.3s; }
.animate-fade-up:nth-child(4) { transition-delay: 0.4s; }

/* Responsive Design */
@media screen and (max-width: 1024px) {
    :root {
        --fs-5xl: 2.75rem;
        --fs-4xl: 2.25rem;
        --fs-3xl: 2rem;
    }
    
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero__content {
        max-width: 100%;
    }
    
    .hero__buttons {
        justify-content: center;
    }
    
    .hero__image {
        display: none;
    }
    
    .about__content {
        grid-template-columns: 1fr;
    }
    
    .about__stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services__grid {
        grid-template-columns: 1fr;
    }
    
    .contact__content {
        grid-template-columns: 1fr;
    }
    
    .footer__content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {
    :root {
        --fs-5xl: 2.25rem;
        --fs-4xl: 1.875rem;
        --fs-3xl: 1.5rem;
        --header-height: 70px;
    }
    
    .section {
        padding: var(--spacing-3xl) 0;
    }
    
    /* Mobile Navigation */
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-secondary);
        padding: var(--spacing-4xl) var(--spacing-xl);
        box-shadow: var(--shadow-2xl);
        transition: right var(--transition-base);
        z-index: 1001;
    }
    
    .nav__menu.show {
        right: 0;
    }
    
    .nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-lg);
    }
    
    .nav__link {
        font-size: var(--fs-lg);
    }
    
    .nav__toggle,
    .nav__close {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
    }
    
    .nav__close {
        position: absolute;
        top: var(--spacing-lg);
        right: var(--spacing-lg);
    }
    
    .hero__scroll {
        display: none;
    }
    
    .about__stats {
        padding: var(--spacing-xl);
    }
    
    .stat__number {
        font-size: var(--fs-2xl);
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media screen and (max-width: 480px) {
    :root {
        --fs-5xl: 1.875rem;
        --fs-4xl: 1.5rem;
        --fs-3xl: 1.25rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--fs-sm);
    }
    
    .hero__buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero__buttons .btn {
        width: 100%;
    }
    
    .about__stats {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: var(--spacing-xl);
    }
    
    .contact__form-wrapper {
        padding: var(--spacing-lg);
    }
}

/* Focus States for Accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Print Styles */
@media print {
    .header,
    .hero__scroll,
    .back-to-top,
    .contact__form-wrapper {
        display: none;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
}