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

:root {
    --primary: #00B8D4;
    --primary-dark: #0097A7;
    --primary-gradient: #007680;
    --secondary: #7E57C2;
    --secondary-dark: #6A3FB5;
    --secondary-gradient: #5E35B1;
    --text-dark: #1A1A1A;
    --text-muted: #555555;
    --bg-white: #FFFFFF;
    --bg-light: #F5F5F5;
    --bg-dark: #1A1A1A;
    --border: #E0E0E0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.3;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: var(--bg-white);
    text-decoration: none;
    font-weight: 600;
    border-radius: 0 0 var(--radius) var(--radius);
    z-index: 10000;
    transition: top var(--transition);
}

.skip-link:focus {
    top: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow var(--transition);
}

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

nav {
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo img {
    height: 48px;
    width: auto;
    object-fit: contain;
    border-radius: 6px;
}

.logo-text {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 5px;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-dark);
    transition: transform var(--transition), opacity var(--transition);
}

.menu-open .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-open .hamburger-line:nth-child(2) {
    opacity: 0;
}

.menu-open .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 4px;
    border-radius: 2px;
}

.hero {
    background: linear-gradient(135deg, var(--primary-gradient) 0%, var(--secondary-gradient) 100%);
    color: var(--bg-white);
    padding: 6rem 0;
    text-align: center;
}

.hero h1 {
    font-size: clamp(1.65rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1.25rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.hero-ctas {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.25rem;
    background-color: var(--bg-white);
    color: var(--primary-dark);
    text-decoration: none;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 50px;
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
    box-shadow: var(--shadow-sm);
    min-height: 44px;
    min-width: 44px;
    text-align: center;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.cta-button:focus-visible {
    outline: 3px solid var(--bg-white);
    outline-offset: 3px;
}

.cta-button:active {
    transform: translateY(0);
}

.cta-secondary {
    background-color: transparent;
    color: var(--bg-white);
    border: 2px solid var(--bg-white);
}

.cta-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.services {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.services h2 {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.service-card {
    background-color: var(--bg-white);
    padding: 2rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
    text-align: center;
}

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

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--primary-dark);
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

.about {
    padding: 5rem 0;
    background-color: var(--bg-white);
}

.about h2 {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.about p {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-muted);
    text-align: center;
}

.portfolio {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.portfolio h2 {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 1.75rem;
}

.portfolio-item {
    display: block;
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
    text-decoration: none;
    color: inherit;
}

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

.portfolio-item:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

.portfolio-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition);
}

.portfolio-item:hover img {
    transform: scale(1.03);
}

.portfolio-content {
    padding: 1.25rem;
}

.portfolio-content h3 {
    font-size: 1.2rem;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.portfolio-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

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

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
    color: var(--bg-white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50px;
    letter-spacing: 0.02em;
}

.contact {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--secondary-gradient) 0%, var(--primary-gradient) 100%);
    color: var(--bg-white);
    text-align: center;
}

.contact h2 {
    font-size: 2.25rem;
    margin-bottom: 1.25rem;
    color: var(--bg-white);
}

.contact > .container > p {
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-ctas {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.contact .cta-button {
    background-color: var(--bg-white);
    color: var(--secondary-dark);
}

.contact .cta-secondary {
    background-color: transparent;
    color: var(--bg-white);
    border: 2px solid var(--bg-white);
}

.contact .cta-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
    margin-top: 2.5rem;
}

.contact-info {
    text-align: left;
}

.contact-info p {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 2rem;
}

.contact-info .contact-ctas {
    justify-content: flex-start;
}

.contact-form-wrapper {
    position: relative;
}

.contact-form {
    background: rgba(255, 255, 255, 0.08);
    padding: 2rem;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    color: var(--bg-white);
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.optional-label {
    font-weight: 400;
    opacity: 0.7;
    font-size: 0.85rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(255, 255, 255, 0.95);
    border: 2px solid transparent;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-dark);
    transition: border-color var(--transition), box-shadow var(--transition);
    min-height: 44px;
}

.form-group textarea {
    resize: vertical;
    min-height: 110px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 184, 212, 0.25);
}

.form-group .field-error {
    display: block;
    color: #FFB3B3;
    font-size: 0.85rem;
    margin-top: 0.375rem;
    min-height: 1.2rem;
}

.form-submit-btn {
    width: 100%;
    padding: 1rem 2rem;
    background-color: var(--bg-white);
    color: var(--secondary-dark);
    border: none;
    border-radius: 50px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
    box-shadow: var(--shadow-sm);
    min-height: 48px;
}

.form-submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.form-submit-btn:focus-visible {
    outline: 3px solid var(--bg-white);
    outline-offset: 3px;
}

.form-submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

.form-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-status {
    margin-top: 1.5rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    text-align: center;
}

.form-status.success {
    background: rgba(76, 175, 80, 0.2);
    border: 1px solid rgba(76, 175, 80, 0.4);
    color: #C8E6C9;
}

.form-status.error {
    background: rgba(244, 67, 54, 0.2);
    border: 1px solid rgba(244, 67, 54, 0.4);
    color: #FFCDD2;
}