/* css/style.css */

/* Global Styles & Variables */
:root {
    --primary-color: #007aff; /* Màu xanh của Apple */
    --secondary-color: #5ac8fa; /* Màu xanh nhạt */
    --text-color-dark: #333;
    --text-color-light: #f4f4f4;
    --bg-light: #f0f2f5; /* Nền xám nhạt */
    --bg-dark: #1c1c1e; /* Nền đen xám kiểu iOS */
    --card-bg: #fff;
    --border-radius: 15px;
    --padding-section: 80px 0;
    --container-width: 1200px;
    --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-dark: 0 4px 30px rgba(0, 0, 0, 0.4);
    --transition-speed: 0.3s ease-in-out;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color-dark);
    background-color: var(--bg-light);
    overflow-x: hidden; /* Prevent horizontal scroll */
}

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

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

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 { font-size: 3.2rem; line-height: 1.2; }
h2 { font-size: 2.5rem; line-height: 1.3; }
h3 { font-size: 1.8rem; }
p { margin-bottom: 1rem; }

.text-center { text-align: center; }

/* Layout & Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: var(--padding-section);
}

.light-bg {
    background-color: var(--bg-light);
    color: var(--text-color-dark);
}

.dark-bg {
    background-color: var(--bg-dark);
    color: var(--text-color-light);
}

.dark-bg h1, .dark-bg h2, .dark-bg h3, .dark-bg p {
    color: var(--text-color-light);
}

.grid-2-cols {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    align-items: center;
}

.grid-3-cols {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    transition: transform 0.2s ease, background-color var(--transition-speed), box-shadow var(--transition-speed);
    white-space: nowrap; /* Prevent text wrapping */
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    background-color: #0056b3; /* Darker shade of primary */
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 122, 255, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: inset 0 0 0 0 var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: var(--shadow-light);
}


/* Header */
.main-header {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 15px 0;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px); /* Glassmorphism effect */
}

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

.main-header .logo img {
    height: 100px; /* Adjust logo size */
    filter: drop-shadow(0px 0px 5px rgba(0, 0, 0, 0.4)) drop-shadow(0px 0px 10px rgba(0, 0, 0, 0.1)); /* Hai lớp bóng đổ */
}

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

.main-nav .nav-links a {
    color: var(--text-color-dark);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
    transition: color var(--transition-speed);
}

.main-nav .nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    left: 0;
    bottom: -3px;
    transition: width var(--transition-speed);
}

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

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: rgba(255, 255, 255, 0.95);
    min-width: 200px;
    box-shadow: var(--shadow-light);
    border-radius: var(--border-radius);
    padding: 10px 0;
    z-index: 1;
    top: calc(100% + 15px); /* Khoảng cách từ menu chính */
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-speed), visibility var(--transition-speed), top var(--transition-speed);
    backdrop-filter: blur(10px);
}

.dropdown:hover .dropdown-content {
    display: block;
    opacity: 1;
    visibility: visible;
    top: 100%;
}

.dropdown-content a {
    color: var(--text-color-dark);
    padding: 10px 20px;
    display: block;
    white-space: nowrap;
    text-align: left;
}

.dropdown-content a:hover {
    background-color: var(--bg-light);
}

/* Language Switcher */
.lang-switcher button {
    background-color: var(--bg-light);
    border: 1px solid #ddd;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    margin-left: 10px;
    transition: all var(--transition-speed);
    color: var(--text-color-dark);
}

.lang-switcher button:hover {
    background-color: #e0e0e0;
}

.lang-switcher button.active {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none; /* Hidden on desktop */
    font-size: 1.8rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color-dark);
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh; /* Full viewport height */
    background: url('../images/hero-bg.jpg') no-repeat center center/cover; /* Make sure to put your own image here */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    overflow: hidden;
    padding-top: 80px; /* Account for fixed header */
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)); /* Dark overlay */
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-content h1 {
    font-size: 4.5rem;
    margin-bottom: 20px;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* About Us Section */
.about-us-section .image-placeholder img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

/* Service Blocks (For Services Page) */
.service-block {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
    align-items: center;
    padding: 50px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1); /* Subtle separator */
}

.service-block:last-child {
    border-bottom: none;
}

.service-block.reverse {
    direction: rtl; /* For image-text-image layout */
}

.service-block.reverse > *:first-child {
    direction: ltr; /* Reset text direction for content */
}

.service-block .service-image img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-speed);
}

.service-block .service-image img:hover {
    transform: scale(1.02);
}

.service-block .service-content h3 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.service-block .service-content p {
    font-size: 1.1rem;
    margin-bottom: 25px;
}

/* Feedback Carousel within Services */
.feedback-carousel {
    margin-top: 30px;
    overflow: hidden;
    position: relative;
    border-radius: var(--border-radius);
    background-color: rgba(255, 255, 255, 0.1); /* Light background for dark sections */
    padding: 20px;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.1);
    min-height: 120px; /* Ensure space even with short feedback */
}

.dark-bg .feedback-carousel {
    background-color: rgba(255, 255, 255, 0.05); /* Even lighter for dark background */
    box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.1);
}

.feedback-carousel h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: inherit; /* Inherit color from parent section */
}

.feedback-carousel .feedback-item {
    display: none;
    font-style: italic;
    font-size: 1.05rem;
    animation: fadeIn 0.8s ease-out;
}

.feedback-carousel .feedback-item.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Team Section */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.team-member {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    padding: 25px;
    text-align: center;
    transition: transform var(--transition-speed);
}

.dark-bg .team-member {
    background-color: #2c2c2e; /* Darker card for dark background */
    box-shadow: var(--shadow-dark);
}

.team-member:hover {
    transform: translateY(-5px);
}

.team-member img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 20px;
    border: 4px solid var(--primary-color);
    box-shadow: 0 0 0 5px rgba(0, 122, 255, 0.2);
}

.team-member h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    color: var(--text-color-dark);
}

.dark-bg .team-member h3 {
    color: var(--text-color-light);
}

.team-member p {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 10px;
}

.dark-bg .team-member p {
    color: #bbb;
}


/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr; /* Info on left, form on right */
    gap: 50px;
    margin-top: 50px;
}

.contact-info p {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-color-light);
}

.contact-info strong {
    color: var(--primary-color);
}

.contact-info iframe {
    border-radius: var(--border-radius);
}

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

.social-links img {
    width: 40px;
    height: 40px;
    transition: transform var(--transition-speed);
}

.social-links img:hover {
    transform: scale(1.1);
}

.contact-form-wrapper {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    padding: 40px;
}

.dark-bg .contact-form-wrapper {
    background-color: #2c2c2e;
    box-shadow: var(--shadow-dark);
}


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

.contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color-dark);
}

.dark-bg .contact-form label {
    color: var(--text-color-light);
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form input[type="tel"],
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    background-color: #fcfcfc;
    color: var(--text-color-dark);
}

.dark-bg .contact-form input,
.dark-bg .contact-form select,
.dark-bg .contact-form textarea {
    background-color: #3a3a3c;
    border-color: #555;
    color: var(--text-color-light);
}
.dark-bg .contact-form input::placeholder,
.dark-bg .contact-form textarea::placeholder {
    color: #aaa;
}


.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
    outline: none;
}

.contact-form textarea {
    resize: vertical; /* Allow vertical resizing only */
    min-height: 100px;
}

/* Footer */
.main-footer {
    background-color: #1a1a1c;
    color: #bbb;
    padding: 40px 0;
    text-align: center;
    font-size: 0.9rem;
}

.main-footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.main-footer .footer-links {
    display: flex;
    gap: 25px;
}

.main-footer .footer-links a {
    color: #bbb;
    transition: color var(--transition-speed);
}

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

/* Scroll Animations */
.scroll-animation {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.scroll-animation.visible {
    opacity: 1;
    transform: translateY(0);
}


/* Responsive Design */
@media (max-width: 992px) {
    h1 { font-size: 2.8rem; }
    h2 { font-size: 2.2rem; }
    h3 { font-size: 1.6rem; }
    .hero-content h1 { font-size: 3.5rem; }
    .hero-content p { font-size: 1.3rem; }

    .main-nav .nav-links {
        gap: 20px;
    }

    .service-block {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .service-block.reverse {
        direction: ltr; /* Reset for small screens */
    }
    .service-block.reverse .service-image {
        order: -1; /* Image first always on mobile */
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }
    .contact-info {
        text-align: center;
    }
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .main-header {
        padding: 10px 0;
    }
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.98);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        flex-direction: column;
        align-items: flex-start;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.4s ease-out, opacity 0.4s ease-out;
        padding: 20px;
        border-bottom-left-radius: var(--border-radius);
        border-bottom-right-radius: var(--border-radius);
        backdrop-filter: blur(10px);
    }
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    .main-nav .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 15px;
        margin-bottom: 20px;
    }
    .main-nav .nav-links li {
        width: 100%;
    }
    .main-nav .nav-links a {
        padding: 10px 0;
        display: block;
    }
    .main-nav .lang-switcher {
        width: 100%;
        display: flex;
        justify-content: center;
        gap: 10px;
    }
    .menu-toggle {
        display: block; /* Show mobile menu toggle */
    }

    .dropdown-content {
        position: static; /* Remove absolute positioning for mobile */
        width: 100%;
        box-shadow: none;
        border-radius: 0;
        padding-left: 20px; /* Indent dropdown items */
        opacity: 1;
        visibility: visible;
        transform: none;
        top: auto;
        background-color: transparent;
    }

    .dropdown:hover .dropdown-content {
        display: block; /* Force display on hover (desktop behavior) */
        opacity: 1;
        visibility: visible;
        transform: none;
        top: auto;
    }

    .dropdown-content a {
        padding: 8px 10px;
    }

    .hero-content h1 { font-size: 2.8rem; }
    .hero-content p { font-size: 1.1rem; }
    .btn { padding: 12px 24px; font-size: 0.9rem; }

    .section-padding {
        padding: 50px 0;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    .hero-content h1 { font-size: 2.5rem; }
    .hero-content p { font-size: 1rem; }
}