/* กำหนดฟอนต์หลักและเปิดใช้งาน Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Kanit', sans-serif;
}


/* --- สไตล์สำหรับ Header ที่เลื่อนตาม --- */
#mainHeader.header-scrolled {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* Light mode scrolled header */
html:not(.dark) #mainHeader.header-scrolled {
    background-color: rgba(255, 255, 255, 0.8);
}

/* Dark mode scrolled header */
.dark #mainHeader.header-scrolled {
    background-color: rgba(17, 24, 39, 0.8);
}


/* --- สไตล์สำหรับ Navbar Underline Animation --- */
nav.desktop-nav a {
    position: relative;
    padding-bottom: 6px;
}

nav.desktop-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    transition: width 0.3s ease-in-out;
    border-radius: 2px;
}

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

/* --- สไตล์สำหรับ Slider --- */
.slider-container {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.slider-wrapper {
    display: flex;
    transition: transform 0.7s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.slider-wrapper img {
    width: 100%;
    height: auto;
    flex-shrink: 0;
    object-fit: cover;
    max-height: 500px;
}

.slider-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.4);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 40px;
    height: 40px;
    cursor: pointer;
    z-index: 10;
    border-radius: 9999px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-button:hover {
    background-color: rgba(0, 0, 0, 0.7);
    transform: translateY(-50%) scale(1.1);
}

.slider-button.left {
    left: 1rem;
}

.slider-button.right {
    right: 1rem;
}

.slider-dots {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.75rem;
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    background-color: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.4s ease;
    border: 2px solid transparent;
}

.dot.active {
    background-color: #3b82f6;
    transform: scale(1.2);
}

/* --- สไตล์สำหรับ FAQ Accordion --- */
.faq-item .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-in-out, padding 0.5s ease;
    padding-top: 0;
    padding-bottom: 0;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-icon {
    transition: transform 0.3s ease;
}

/* --- Gradient Text --- */
.gradient-text {
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

/* Custom styles for form transitions */
.form-container-wrapper {
    perspective: 1000px;
}

.form-card {
    transition: transform 0.6s, height 0.4s ease-in-out;
    transform-style: preserve-3d;
}

.form-card.is-flipped {
    transform: rotateY(180deg);
}

.form-front,
.form-back {
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.form-back {
    transform: rotateY(180deg);
}