/* --- Variables --- */
:root {
    /* New Palette: Deep Tech Blue & Vibrant Emerald */
    --primary-color: #0F172A;
    /* Dark Blue */
    --accent-color: #10B981;
    /* Emerald Green */
    --secondary-color: #3B82F6;
    /* Bright Blue */
    --bg-color: #F8FAFC;
    /* Light Gray */
    --text-color: #334155;
    /* Slate Gray */
    --white: #FFFFFF;
    --error: #EF4444;

    --font-main: 'Outfit', sans-serif;

    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;

    --transition: all 0.3s ease;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 60px 0;
}

.section__title {
    text-align: center;
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 40px;
}

.mt-20 {
    margin-top: 20px;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    text-align: center;
    transition: var(--transition);
}

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

.btn--primary:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}

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

.btn--outline:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

.btn--small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn--full {
    width: 100%;
    margin-top: 10px;
}

/* --- Header --- */
.header {
    background-color: var(--white);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.logo:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
}

.logo svg {
    transition: var(--transition);
}

.logo:hover svg {
    transform: scale(1.1);
}

.nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background-color: var(--white);
    padding: 80px 20px;
    transition: var(--transition);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
}

.nav.active {
    right: 0;
}

.nav__list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.nav__link {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-color);
}

.nav__link:hover {
    color: var(--accent-color);
}

.nav__close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.nav__close:hover {
    color: var(--accent-color);
    transform: rotate(90deg) scale(1.1);
}

.burger {
    background: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.burger:hover {
    color: var(--accent-color);
    transform: scale(1.1);
}

@media (min-width: 1024px) {

    .burger,
    .nav__close {
        display: none;
    }

    .nav {
        position: static;
        width: auto;
        height: auto;
        padding: 0;
        background: none;
        box-shadow: none;
    }

    .nav__list {
        flex-direction: row;
        gap: 30px;
    }
}

/* --- Hero --- */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    background: url('images/hero-bg.jpg') center/cover no-repeat;
    color: var(--white);
    padding-top: 60px;
    /* Header spacing */
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(59, 130, 246, 0.4));
}

.hero__content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
}

.badge:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.hero__title {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero__subtitle {
    font-size: 1.1rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero__actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

@media (min-width: 768px) {
    .hero__title {
        font-size: 3.5rem;
    }
}

/* --- Features --- */
.features__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.15), 0 4px 8px -2px rgba(0, 0, 0, 0.1);
}

.feature-card__icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

@media (min-width: 768px) {
    .features__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --- Services Masonry --- */
.masonry-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: 1fr;
}

.masonry-item {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.masonry-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.15), 0 4px 8px -2px rgba(0, 0, 0, 0.1);
}

.masonry-item img {
    transition: var(--transition);
}

.masonry-item:hover img {
    transform: scale(1.05);
}

.masonry-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.masonry-content {
    padding: 20px;
}

.masonry-content.text-only {
    background-color: var(--primary-color);
    color: var(--white);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.link-arrow {
    margin-top: 15px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-color);
    font-weight: 600;
    transition: var(--transition);
}

.link-arrow:hover {
    color: #059669;
    transform: translateX(5px);
}

.link-arrow i {
    transition: var(--transition);
}

.link-arrow:hover i {
    transform: translateX(3px);
}

@media (min-width: 768px) {
    .masonry-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .masonry-item:nth-child(1) {
        grid-row: span 2;
    }

    .masonry-item:nth-child(1) img {
        height: 400px;
    }
}

/* --- Testimonials --- */
.testimonials {
    background-color: var(--primary-color);
    color: var(--white);
}

.testimonials .section__title {
    color: var(--white);
}

.testimonials__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.review-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.review-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-3px);
}

.review-text {
    font-style: italic;
    margin-bottom: 20px;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.avatar {
    width: 40px;
    height: 40px;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.avatar--photo {
    object-fit: cover;
    background: none;
}

@media (min-width: 768px) {
    .testimonials__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --- Contacts & Form --- */
.contacts__wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.contacts__list li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.1rem;
}

.contacts__list i {
    color: var(--accent-color);
}

.contact-form {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-group {
    position: relative;
    margin-bottom: 20px;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: var(--radius);
    outline: none;
    transition: var(--transition);
}

.form-group input:hover {
    border-color: var(--accent-color);
}

.form-group input:focus {
    border-color: var(--accent-color);
}

.form-group label {
    position: absolute;
    left: 15px;
    top: 12px;
    color: #999;
    pointer-events: none;
    transition: var(--transition);
    background: var(--white);
    padding: 0 5px;
}

.form-group input:focus~label,
.form-group input:not(:placeholder-shown)~label {
    top: -10px;
    font-size: 0.8rem;
    color: var(--accent-color);
}

.error-msg {
    color: var(--error);
    font-size: 0.8rem;
    display: none;
    margin-top: 5px;
}

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

.form-group.error .error-msg {
    display: block;
}

.captcha-group {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

#captcha-question {
    font-weight: bold;
    font-size: 1.2rem;
}

#captcha-input {
    width: 80px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--radius);
    transition: var(--transition);
}

#captcha-input:hover {
    border-color: var(--accent-color);
}

#captcha-input:focus {
    border-color: var(--accent-color);
    outline: none;
}

.form-status {
    margin-top: 15px;
    text-align: center;
    display: none;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

.success-message {
    color: var(--accent-color);
    font-weight: bold;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@media (min-width: 768px) {
    .contacts__wrapper {
        grid-template-columns: 1fr 1fr;
    }
}

/* --- Footer --- */
.footer {
    background: var(--primary-color);
    color: #94a3b8;
    padding: 60px 0 20px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer h4 {
    color: var(--white);
    margin-bottom: 20px;
}

.footer__logo {
    display: block;
    color: var(--white);
    font-weight: bold;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.footer ul li {
    margin-bottom: 10px;
}

.footer a,
.footer button {
    color: inherit;
    transition: var(--transition);
    background: none;
    font-size: 1rem;
    padding: 0;
    text-align: left;
}

.footer a:hover,
.footer button:hover {
    color: var(--accent-color);
}

.footer__bottom {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
}

@media (min-width: 768px) {
    .footer__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* --- Modals --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--white);
    padding: 40px;
    width: 90%;
    max-width: 600px;
    border-radius: var(--radius);
    position: relative;
    max-height: 80vh;
    overflow-y: auto;
    display: none;
    /* Hidden by default within flex container */
    animation: modalSlide 0.3s ease;
}

.modal.active {
    display: block;
}

@keyframes modalSlide {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 1.5rem;
    background: none;
    color: #999;
    transition: var(--transition);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
    transform: rotate(90deg) scale(1.1);
}

.modal-content h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.modal-content h4 {
    margin-top: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.modal-content p {
    margin-bottom: 15px;
    line-height: 1.6;
}

.modal-content ul {
    list-style: disc;
    padding-left: 20px;
    margin: 10px 0 15px 0;
}

.modal-content ol {
    list-style: decimal;
    padding-left: 20px;
    margin: 10px 0 15px 0;
}

.modal-content li {
    margin-bottom: 8px;
    line-height: 1.5;
}

.modal-content a {
    color: var(--accent-color);
    text-decoration: underline;
}

.modal-content a:hover {
    color: #059669;
}