/* --- Google Font --- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

/* --- CSS Variables --- */
:root {
    --primary-color: #ff6600;
    --primary-color-hover: #e65c00;
    --secondary-color: #333;
    --background-color: #ffffff;
    --card-background-color: #f9f9f9;
    --text-color: #333;
    --text-color-light: #777;
    --border-color: #eaeaea;
    --header-height: 80px;
    --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    --transition-speed: 0.3s;
}

:root[data-theme="dark"] {
    --primary-color: #ff771a;
    --primary-color-hover: #ff8533;
    --secondary-color: #f1f1f1;
    --background-color: #121212;
    --card-background-color: #1e1e1e;
    --text-color: #e0e0e0;
    --text-color-light: #a0a0a0;
    --border-color: #2e2e2e;
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

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

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

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

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

ul {
    list-style: none;
}

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

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    font-weight: 700;
}

/* --- Header --- */
header {
    background-color: var(--background-color);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    display: flex;
    align-items: center;
    box-shadow: var(--box-shadow);
    z-index: 1000;
    transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

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

.logo img {
    height: 50px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-speed) ease;
}

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

#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-color);
    position: relative;
    width: 30px;
    height: 30px;
    transition: color var(--transition-speed) ease;
}

#theme-toggle .fa-sun,
#theme-toggle .fa-moon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

:root[data-theme="light"] #theme-toggle .fa-sun {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
}
:root[data-theme="light"] #theme-toggle .fa-moon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(90deg);
}

:root[data-theme="dark"] #theme-toggle .fa-sun {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-90deg);
}
:root[data-theme="dark"] #theme-toggle .fa-moon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

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

.btn-primary:hover {
    background-color: var(--primary-color-hover);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

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

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

/* --- Hero Section --- */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-image: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('hero-bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    text-align: center;
    color: #fff;
}

.hero-content {
    max-width: 800px;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 40px;
}

/* --- Parts Section --- */
.parts-section {
    padding: 100px 20px;
}

.parts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.part-card {
    background-color: var(--card-background-color);
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    padding: 30px;
    text-align: center;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, background-color var(--transition-speed) ease;
}

.part-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.12);
}
:root[data-theme="dark"] .part-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

.part-card img {
    height: 200px;
    object-fit: contain;
    margin: 0 auto 20px;
}

.part-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--text-color);
    transition: color var(--transition-speed) ease;
}

.part-card .price {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: color var(--transition-speed) ease;
}

/* --- About Section --- */
.about-section {
    padding: 100px 20px;
    background-color: var(--card-background-color);
    transition: background-color var(--transition-speed) ease;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    text-align: center;
}

.feature-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: color var(--transition-speed) ease;
}

.feature-item h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.feature-item p {
    color: var(--text-color-light);
    line-height: 1.6;
    transition: color var(--transition-speed) ease;
}

/* --- Contact Section --- */
.contact-section {
    padding: 100px 20px;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: flex-start;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3, .contact-form h3 {
    font-size: 1.8rem;
    margin-bottom: 25px;
    font-weight: 600;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 1rem;
    color: var(--text-color-light);
}

.contact-info i {
    color: var(--primary-color);
    font-size: 1.5rem;
    width: 25px;
    text-align: center;
}

.contact-info .social-links {
    margin-top: 30px;
    display: flex;
    gap: 20px;
}

.contact-info .social-links a {
    font-size: 1.8rem;
    color: var(--text-color);
    transition: color var(--transition-speed) ease, transform var(--transition-speed) ease;
}

.contact-info .social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

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

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--card-background-color);
    color: var(--text-color);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: all var(--transition-speed) ease;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-color-light);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.2);
}
:root[data-theme="dark"] .contact-form input:focus,
:root[data-theme="dark"] .contact-form textarea:focus {
    box-shadow: 0 0 0 3px rgba(255, 119, 26, 0.25);
}

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

.contact-form .btn-primary {
    width: 100%;
}

/* --- Footer --- */
footer {
    background-color: var(--secondary-color);
    color: var(--text-color-light);
    padding: 40px 20px;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

footer .container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    text-align: center;
}

:root[data-theme="dark"] footer {
    color: var(--text-color-light);
}

.social-links {
    display: flex;
    gap: 20px;
}

.social-links a {
    font-size: 1.5rem;
    color: var(--text-color-light);
    transition: color var(--transition-speed) ease;
}

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

/* --- Responsive --- */
@media (max-width: 992px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* Simple solution for mobile, could be improved with a hamburger menu */
    }

    .hero-content h1 {
        font-size: 3rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    footer .container {
        flex-direction: column;
        text-align: center;
    }
}