/* --- Global Styles & Variables --- */
:root {
    --primary-blue: #0d47a1;
    /* สีน้ำเงินเข้มหลัก */
    --dark-blue: #002171;
    --light-blue: #5472d3;
    --text-dark: #212121;
    /* สีดำสำหรับเนื้อหา */
    --text-light: #f5f5f5;
    --background-gray: #f4f7f9;
    --white: #ffffff;
    --accent-gold: #ffab40;
    --border-color: #e0e0e0;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Sarabun', sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: auto;
    padding: 4rem 2rem;
}

h1,
h2,
h3 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--dark-blue);
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

.hidden {
    display: none !important;
}

/* --- Header & Navigation --- */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    border-bottom: 1px solid var(--border-color);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: auto;
    padding: 0 2rem;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary-blue);
    font-weight: 700;
    flex-shrink: 0;
}

.logo-img {
    height: 45px;
    width: auto;
}

.logo span {
    font-size: 1.6rem;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links li {
    position: relative;
}

.nav-links a {
    color: var(--text-dark);
    padding: 0.5rem 0.8rem;
    display: block;
    font-weight: 500;
    font-size: 1rem;
    white-space: nowrap;
    transition: color 0.3s ease, background-color 0.3s ease;
    border-radius: 8px;
}

.nav-links>li>a {
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-links a:hover {
    color: var(--primary-blue);
    background-color: var(--background-gray);
}

/* Dropdown Menu */
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    list-style: none;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-width: 280px;
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}

.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    padding: 0.75rem 1rem;
    white-space: normal;
    font-weight: 400;
    font-size: 0.9rem;
}

.dropdown>a i {
    font-size: 0.7em;
    transition: transform 0.3s ease;
}

.dropdown:hover>a i {
    transform: rotate(180deg);
}

/* Nav Actions (Right side) */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.burger {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    padding: 0.5rem;
    z-index: 1001;
    /* ให้อยู่เหนือ nav-links */
}


/* Language Switcher Styles */
.lang-switcher {
    display: flex;
    align-items: center;
    margin-left: 1rem;
}

.lang-switcher span {
    color: #ccc;
    margin: 0 0.25rem;
}

.lang-switcher .lang-btn {
    padding: 0.2rem 0.5rem;
    font-weight: 700;
    color: #aaa;
    border: 2px solid transparent;
}

.lang-switcher .lang-btn.active {
    color: var(--primary-blue);
}

/* PEAK Sign in Button */
.cta-button-nav {
    background-color: var(--primary-blue);
    color: var(--white) !important;
    border-radius: 8px;
    padding: 0.6rem 1.2rem !important;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background-color 0.3s ease, transform 0.2s ease;
    text-align: center;
    margin-left: 1rem;
}

.cta-button-nav:hover {
    background-color: var(--dark-blue) !important;
    transform: translateY(-2px);
}

/* --- Hero Section --- */
#hero {
    background: linear-gradient(rgba(13, 71, 161, 0.8), rgba(0, 33, 113, 0.85)), url('https://images.unsplash.com/photo-1554224155-1696413565d3?q=80&w=2070&auto=format&fit=crop') no-repeat center center/cover;
    min-height: 85vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white);
    padding: 4rem 2rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.hero-content p {
    font-size: 1.3rem;
    max-width: 700px;
    margin: 0 auto 2.5rem;
    opacity: 0.9;
}

.cta-button {
    background-color: var(--accent-gold);
    color: var(--text-dark);
    padding: 1rem 3rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(255, 171, 64, 0.5);
}

/* --- Sections Styling --- */
#services,
#location-info {
    background-color: var(--white);
}

#about,
#external-links,
#announcements,
#contact {
    background-color: var(--background-gray);
    border-top: 1px solid var(--border-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--white);
    padding: 2.5rem;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-blue);
}

.service-card i {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

/* External Links Section */
#external-links .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: flex-start;
}

.links-column h3 {
    margin-bottom: 1.5rem;
}

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

.link-card {
    background-color: var(--white);
    padding: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
    color: var(--primary-blue);
    border-radius: 8px;
    font-weight: 500;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

.link-card:hover {
    background-color: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

/* Announcements Section */
.announcement-box {
    display: flex;
    align-items: center;
    gap: 2rem;
    background-color: var(--white);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.announcement-box i {
    font-size: 3rem;
    color: var(--accent-gold);
}

.announcement-box h2 {
    text-align: left;
    margin-bottom: 0.5rem;
}

.announcement-text {
    font-style: italic;
    color: #555;
}

/* About Section */
.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
    align-items: center;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-content h2 {
    text-align: left;
}

.about-text {
    line-height: 1.8;
    color: #333;
}

/* --- Contact Section & Form --- */
.contact-form-container {
    max-width: 800px;
    margin: auto;
    background-color: var(--white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.form-choice-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.choice-btn {
    flex: 1;
    padding: 0.8rem 1rem;
    font-size: 1rem;
    font-family: 'Sarabun', sans-serif;
    font-weight: 600;
    border: 1px solid var(--border-color);
    background-color: var(--white);
    color: var(--primary-blue);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.choice-btn.active {
    background-color: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

.choice-btn.secondary-choice {
    font-size: 0.9rem;
}

#contact-form fieldset {
    border: none;
    padding: 0;
    margin: 0;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group.checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: 10px;
}

.form-group.checkbox-group label {
    margin-bottom: 0;
    font-weight: 400;
}

.disclaimer {
    font-size: 0.8rem;
    color: #777;
    font-style: italic;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Sarabun', sans-serif;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input[type="checkbox"] {
    width: auto;
    height: 1.2em;
    width: 1.2em;
}

.meeting-time-input {
    margin-bottom: 0.5rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.1);
}

#contact-form button[type="submit"] {
    grid-column: 1 / -1;
    justify-self: start;
    margin-top: 1rem;
}

/* --- Location Info Section --- */
#location-info {
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
}

.location-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    align-items: center;
}

.location-details h3 {
    margin-bottom: 1.5rem;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-info-item i {
    font-size: 1.2rem;
    color: var(--primary-blue);
    margin-top: 5px;
}

.contact-info-item div {
    display: flex;
    flex-direction: column;
}

.contact-info-item span {
    color: #555;
}

.map-container {
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.map-container iframe {
    width: 100%;
    height: 100%;
}

/* --- Footer --- */
footer {
    background-color: var(--dark-blue);
    color: var(--text-light);
    text-align: center;
    padding: 3rem 2rem;
}

/* --- Responsive Media Queries --- */
@media (max-width: 1100px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background-color: var(--white);
        flex-direction: column;
        align-items: flex-start;
        transition: right 0.5s ease-in-out;
        padding: 6rem 2rem 2rem;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        gap: 0;
        overflow-y: auto;
    }

    .nav-links.nav-active {
        right: 0;
    }

    .nav-links li {
        width: 100%;
        text-align: left;
    }

    .nav-links li a {
        padding: 1rem;
        width: 100%;
        font-size: 1rem;
    }

    .nav-links .cta-button-nav {
        display: block;
        margin: 1rem 0 0 1rem;
    }

    .lang-switcher {
        margin: 1rem 0 0 1rem;
    }

    .dropdown:hover .dropdown-menu {
        display: none;
    }

    .dropdown-menu {
        position: static;
        display: none;
        background-color: #f0f0f0;
        box-shadow: none;
        width: 100%;
        padding-left: 1rem;
        border-radius: 0;
        border-bottom: 1px solid #ddd;
        min-width: unset;
        transform: none;
        opacity: 1;
        visibility: visible;
        transition: none;
    }

    .dropdown.open .dropdown-menu {
        display: block;
    }

    .dropdown.open>a i {
        transform: rotate(180deg);
    }

    .nav-actions {
        margin-left: 0;
    }

    .burger {
        display: block;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .about-wrapper,
    .location-wrapper {
        grid-template-columns: 1fr;
    }
}

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

    .form-group.full-width {
        grid-column: auto;
    }

    #contact-form button[type="submit"] {
        width: 100%;
    }

    .announcement-box {
        flex-direction: column;
        text-align: center;
    }

    .announcement-box h2 {
        text-align: center;
    }
}

@media (max-width: 480px) {
    h2 {
        font-size: 2rem;
    }

    .container {
        padding: 3rem 1rem;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-content p {
        font-size: 1.1rem;
    }

    .contact-form-container {
        padding: 2rem 1.5rem;
    }
}

/* Helper class to prevent body scroll when mobile menu is open */
body.no-scroll {
    overflow: hidden;
}

/* --- Floating Contact Buttons --- */
.floating-contact {
    position: fixed;
    bottom: 25px;
    right: 25px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 1010; /* ให้อยู่เหนือทุกอย่าง */
}

.fab {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--white);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.fab i {
    font-size: 2.2rem; /* ขนาดไอคอน */
}

.fab:hover {
    transform: scale(1.1); /* ขยายเมื่อเมาส์ชี้ */
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.fab.line {
    background-color: #00B900; /* สีเขียวของ LINE */
}

.fab.whatsapp {
    background-color: #25D366; /* สีเขียวของ WhatsApp */
}

.fab.messenger {
    background-color: #1692e6;
}

/* ทำให้ปุ่มเล็กลงในหน้าจอมือถือ */
@media (max-width: 768px) {
    .floating-contact {
        bottom: 20px;
        right: 20px;
    }

    .fab {
        width: 50px;
        height: 50px;
    }
    
    .fab i {
        font-size: 1.8rem;
    }
}