/* --- General & Body Styles --- */

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #121212;
    color: #F0F4F8;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

/* --- Nav Bar Styles --- */

.nav-section {
    width: 100%;
    height: 60px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10;
    display: flex;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    justify-content: space-between;
    align-items: center;
    padding: 0 25px;
    box-sizing: border-box;
    border-bottom: 1px solid transparent;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-container img {
    overflow: hidden;
    width: 40px;
    height: 40px;
}

.logo-placeholder {
    width: 40px;
    height: 40px;
    background-color: #ffffff;
    border-radius: 5px;
    overflow: hidden;
    object-fit: fill;
    transition: background-color 0.3s ease;
}

.site-name {
    color: white;
    font-size: 22px;
    font-weight: bold;
    transition: color 0.3s ease;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    font-weight: 500;
    position: relative;
    padding-bottom: 5px;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: #ffffff;
    transform-origin: bottom right;
    transition: transform 0.25s ease-out;
}

.nav-links a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

.login-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.login-btn {
    display: inline-block;
    padding: 10px 24px;
    color: red;
    background-color: white;
    text-decoration: none;
    font-weight: bold;
    border-radius: 5px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.login-btn:hover {
    background-color: #e0e0e0;
    color: red;
}

/* --- Hero Image Section --- */

.hero-image-block {
    position: relative;
    width: 100%;
    height: 90svh;
    transform: translateY(65px);
}

.hero-image-block img.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
}

.hero-image-block::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    pointer-events: none;
    z-index: -1;
    transition: background-color 0.3s ease;
}

.hero-overlay-text {
    z-index: 3;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    padding: 20px;
    max-width: 90%;
    color: #ffffff;
}

.hero-overlay-text h1 {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.4;
    color: #f1f1f1;
}

.hero-overlay-text .highlight {
    color: #00ffff;
}

.hero-overlay-text .tagline {
    font-size: 20px;
    margin-top: 10px;
    color: #e0e0e0;
}

.hero-overlay-text .glow {
    color: #39ff14;
    text-shadow: 0 0 10px rgba(57, 255, 20, 0.6);
    font-weight: bold;
}

/* --- About Us Section --- */

.about-us {
    background: #121212;
    padding: 80px 30px;
    border-top: 1px solid #2a2a2a;
    text-align: center;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.about-us h2,
.about-us p,
.about-card,
.about-card h3,
.about-card ul li {
    transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}

.about-us h2 {
    font-size: 36px;
    color: #d60000;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.about-us p {
    font-size: 18px;
    color: #ccc;
    line-height: 1.7;
    margin: 25px auto;
    max-width: 90%;
}

.about-columns {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-top: 30px;
}

.about-card {
    background-color: #242424;
    border-left: 6px solid #d60000;
    border-radius: 16px;
    padding: 30px 25px;
    max-width: 420px;
    width: 100%;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: left;
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.about-card h3 {
    font-size: 22px;
    color: #d60000;
    margin-bottom: 20px;
}

.about-card ul {
    padding-left: 20px;
    list-style: none;
}

.about-card ul li {
    margin-bottom: 12px;
    font-size: 16px;
    color: #ccc;
}

/* --- Alternating Feature Sections --- */

.feature-section {
    display: flex;
    align-items: center;
    background-color: #121212;
    overflow: hidden;
    transition: background-color 0.3s ease;
}

.feature-section:nth-of-type(odd) {
    flex-direction: row-reverse;
    background-color: #1F1F1F;
}

.feature-image {
    width: 35%;
    box-sizing: border-box;
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
}

.feature-content {
    width: 65%;
    padding: 3rem;
    box-sizing: border-box;
    transition: color 0.3s ease;
}

.feature-content h2,
.feature-content p {
    transition: color 0.3s ease;
}

.feature-content h2 {
    font-size: 2.5rem;
    margin-top: 0;
    margin-bottom: 1rem;
    color: #f1f1f1;
}

.feature-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #ccc;
}

/* --- Shared Button Style --- */

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: #d60000;
    color: white;
    text-decoration: none;
    font-weight: bold;
    border-radius: 8px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
    background-color: #a00000;
    transform: translateY(-2px);
}

/* --- Footer --- */

.site-footer {
    background-color: #1A1A1A;
    color: white;
    padding: 30px 20px;
    text-align: center;
    font-size: 14px;
    border-top: 1px solid #2a2a2a;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.site-footer a {
    color: #d60000;
    text-decoration: none;
    margin: 0 5px;
}

.site-footer a:hover {
    text-decoration: underline;
}

/* --- THEME TOGGLE BUTTON STYLES --- */

.theme-toggle-btn {
    background: none;
    border: 1px solid #555;
    border-radius: 20px;
    cursor: pointer;
    padding: 3px;
    display: flex;
    align-items: center;
    position: relative;
    width: 30px;
    height: 26px;
    transition: border-color 0.3s ease;
}

.theme-toggle-btn .icon-sun,
.theme-toggle-btn .icon-moon {
    font-size: 16px;
    transition: opacity 0.3s ease;
}

.theme-toggle-btn .icon-moon {
    opacity: 1;
}

.theme-toggle-btn .icon-sun {
    opacity: 0;
    position: absolute;
}

/* --- LIGHT MODE STYLES --- */

body.light-mode {
    background-color: #f0f4f8;
    color: #121212;
}

.light-mode .nav-section {
    background: rgba(255, 255, 255, 0.7);
    border-bottom: 1px solid #ddd;
}

.light-mode .logo-placeholder {
    background-color: #121212;
}

.light-mode .site-name,
.light-mode .nav-links a {
    color: #121212;
}

.light-mode .nav-links a::after {
    background-color: #121212;
}

.light-mode .login-btn {
    color: white;
    background-color: #d60000;
}

.light-mode .login-btn:hover {
    background-color: #a00000;
}

.light-mode .theme-toggle-btn {
    border-color: #ccc;
}

.light-mode .theme-toggle-btn .icon-moon {
    opacity: 0;
}

.light-mode .theme-toggle-btn .icon-sun {
    opacity: 1;
}

.light-mode .about-us {
    background: #ffffff;
    border-top-color: #eee;
}

.light-mode .about-us p {
    color: #555;
}

.light-mode .about-card {
    background-color: #f9f9f9;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.light-mode .about-card ul li {
    color: #555;
}

.light-mode .feature-section {
    background-color: #ffffff;
}

.light-mode .feature-section:nth-of-type(even) {
    background-color: #f0f4f8;
}

.light-mode .feature-content h2 {
    color: #121212;
}

.light-mode .feature-content p {
    color: #555;
}

.light-mode .site-footer {
    background-color: #e9ecef;
    color: #121212;
    border-top-color: #ddd;
}

/* --- Responsive & Animation Styles --- */

.feature-image,
.feature-content,
.about-us h2,
.about-us p,
.about-us .btn {
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.about-card {
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.3s ease, opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.js-init-left {
    opacity: 0;
    transform: translateX(-100px);
}

.js-init-right {
    opacity: 0;
    transform: translateX(100px);
}

.js-init-down {
    opacity: 0;
    transform: translateY(-50px);
}

.js-init-up {
    opacity: 0;
    transform: translateY(50px);
}

.animated-arrow-left {
    display: inline-flex;
    align-items: center;
    font-size: 2rem;
    margin-right: 8px;
    color: #FF5722;
    animation: arrowWiggleRight 1s infinite alternate;
    font-weight: bold;
}

@keyframes arrowWiggleRight {
    0% {
        transform: translateX(0);
        opacity: 0.5;
    }
    80% {
        transform: translateX(8px);
        opacity: 1;
    }
    100% {
        transform: translateX(5px);
        opacity: 0.8;
    }
}

/* ### Media Queries for All Screen Sizes ###
    This section ensures the layout is responsive from extra-large desktops to small mobile devices.
*/

/* Extra-large screens (desktops and laptops, 1200px and up) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
        margin: 0 auto;
    }
    .feature-content h2 {
        font-size: 3rem;
    }
}

/* Large screens (tablets and some desktops, 992px to 1199px) */
@media (max-width: 1199px) {
    .nav-links {
        gap: 25px;
    }
    .hero-overlay-text h1 {
        font-size: 36px;
    }
}

/* Medium screens (tablets, 768px to 991px) */
@media (max-width: 991px) {
    .nav-links {
        gap: 20px;
    }
    .nav-section {
        padding: 0 15px;
    }
    .hero-overlay-text h1 {
        font-size: 32px;
    }
    .feature-content h2 {
        font-size: 2.25rem;
    }
    .feature-content p {
        font-size: 1rem;
    }
}

/* Small screens (landscape phones and tablets, 576px to 767px) */
@media (max-width: 767px) {
    .nav-links {
        display: none;
    }
    .login-container {
        gap: 10px;
    }
    .login-btn {
        padding: 8px 16px;
        font-size: 14px;
    }
    .hero-overlay-text h1 {
        font-size: 28px;
    }
    .hero-overlay-text .tagline {
        font-size: 16px;
    }
    .about-us {
        padding: 60px 15px;
    }
    .about-us h2 {
        font-size: 28px;
    }
    .about-columns {
        flex-direction: column;
    }
    .feature-section,
    .feature-section:nth-of-type(odd) {
        flex-direction: column;
    }
    .feature-image,
    .feature-content {
        width: 100%;
    }
    .feature-content {
        padding: 2rem 1rem;
        text-align: center;
    }
    .feature-content h2 {
        font-size: 2rem;
    }
    .site-footer {
        padding: 20px 10px;
    }
}

/* Extra-small screens (portrait phones, less than 576px) */
@media (max-width: 575px) {
    .nav-section {
        height: 50px;
        padding: 0 10px;
    }
    .logo-container {
        gap: 10px;
    }
    .logo-placeholder, .logo-container img {
        width: 35px;
        height: 35px;
    }
    .site-name {
        font-size: 18px;
    }
    .login-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    .hero-image-block {
        transform: translateY(50px);
    }
    .hero-overlay-text h1 {
        font-size: 24px;
    }
    .hero-overlay-text .tagline {
        font-size: 14px;
    }
    .about-card {
        padding: 20px 15px;
    }
    .feature-content h2 {
        font-size: 1.5rem;
    }
    .btn {
        font-size: 14px;
        padding: 10px 20px;
    }
}