/* ========================================
   NAVIGATION BAR
   Fixed top navigation with logo and menu
   ======================================== */

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid rgba(30, 64, 175, 0.1);
}

nav.scrolled {
    box-shadow: 0 6px 30px rgba(30, 64, 175, 0.15);
    background: rgba(255, 255, 255, 1);
    border-bottom: 2px solid rgba(30, 64, 175, 0.2);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 50px;
    height: 85px;
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 20px;
        height: 70px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 15px;
        height: 65px;
    }
}

.logo {
    padding-top: 5px;
    display: flex;
    align-items: center;
    gap: 18px;
    flex-shrink: 0;
    justify-content: flex-start;
}

.logo-icon {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.logo-icon:hover {
    transform: scale(1.05) rotate(5deg);
}

.circle-logo {
    height: 55px;
    width: 55px;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid var(--primary);
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.2);
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .circle-logo {
        height: 45px;
        width: 45px;
        border: 2px solid var(--primary);
    }
}

@media (max-width: 480px) {
    .circle-logo {
        height: 40px;
        width: 40px;
    }
}

.circle-logo:hover {
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.35);
    border-color: var(--accent);
}

.logo-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.3;
    letter-spacing: -0.3px;
    max-width: none;
    white-space: normal;
    text-align: left;
}

body.th .logo-text {
    font-size: 20px;
    line-height: 1.4;
    font-weight: 600;
}

@media (max-width: 768px) {
    .logo-text {
        font-size: 13px;
        max-width: none;
    }

    body.th .logo-text {
        font-size: 12px;
    }
}

@media (max-width: 600px) {
    .logo-text {
        font-size: 11px;
        max-width: none;
    }

    body.th .logo-text {
        font-size: 10.5px;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 13px;
        max-width: none;
    }

    body.th .logo-text {
        font-size: 12px;
    }
}

@media (max-width: 375px) {
    .logo-text {
        display: block !important;
        font-size: 11px !important;
        max-width: none !important;
        white-space: normal !important;
        line-height: 1.3 !important;
    }

    body.th .logo-text {
        font-size: 10px !important;
    }
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 10px;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    display: flex;
    align-items: center;
    text-align: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    font-size: 12px;
    transition: all 0.3s ease;
    position: relative;
    padding: 10px 5px;
    letter-spacing: 0.3px;
    display: inline-block;
}

body.th .nav-menu a {
    font-size: 14px;
    font-weight: 600;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    background: #5f94ff;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-menu a:hover::before,
.nav-menu a.active::before {
    width: 100%;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    opacity: 1;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    margin-left: 20px;
    background: none;
    border: none;
    padding: 10px;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: background 0.3s ease;
}

.mobile-menu:hover {
    background: var(--gray-100);
}

.mobile-menu:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

.mobile-menu span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    transition: 0.3s;
    display: block;
}

/* ========================================
   MOBILE RESPONSIVE - 2 ROWS LAYOUT
   Row 1: Logo + Company name
   Row 2: nav-right (hamburger + lang switcher)
   ======================================== */

@media (max-width: 968px) {
    /* Nav container - 2 rows */
    .nav-container {
        flex-wrap: wrap;
        height: auto;
        padding: 10px 20px;
        gap: 8px;
    }

    /* Row 1: Logo takes full width */
    .logo {
        width: 100%;
        justify-content: space-evenly;
        padding-top: 0;
    }

    /* Row 2: nav-right - hamburger left, lang right */
    .nav-right {
        width: 100%;
        justify-content: space-around;
        gap: 15px;
    }

    /* Nav menu - slide from left */
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 110px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s ease;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        padding: 20px 0;
        gap: 0;
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid var(--gray-200);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .nav-menu a {
        display: block;
        padding: 15px 20px;
        font-size: 15px;
        text-align: center;
    }

    body.th .nav-menu a {
        font-size: 16px;
    }

    .nav-menu a::before {
        display: none;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
        background: var(--gray-100);
        color: var(--primary);
    }

    /* Show hamburger button */
    .mobile-menu {
        display: flex;
        margin-left: 0;
    }

    /* Hamburger animation when active */
    .mobile-menu.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .lang-switcher {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 8px 15px;
    }

    .nav-menu {
        top: 100px;
    }

    .nav-menu a {
        padding: 14px 18px;
        font-size: 14px;
    }

    body.th .nav-menu a {
        font-size: 15px;
    }
}

/* Large Phones - 480px */
@media (max-width: 480px) {
    .nav-container {
        padding: 8px 12px;
        gap: 6px;
    }

    .nav-menu {
        top: 112px;
        padding: 15px 0;
    }

    .nav-menu a {
        padding: 12px 15px;
        font-size: 13px;
    }

    body.th .nav-menu a {
        font-size: 14px;
    }
}

/* Small Phones - iPhone 6/7/8/SE - 375px */
@media (max-width: 375px) {
    .nav-container {
        padding: 6px 10px;
        gap: 5px;
    }

    .logo {
        gap: 10px;
    }

    .circle-logo {
        height: 38px;
        width: 38px;
    }

    .logo-text {
        font-size: 10px;
    }

    body.th .logo-text {
        font-size: 9.5px;
    }

    .nav-menu {
        top: 105px;
        padding: 12px 0;
    }

    .nav-menu a {
        padding: 11px 12px;
        font-size: 12px;
    }

    body.th .nav-menu a {
        font-size: 13px;
    }

    .mobile-menu span {
        width: 22px;
        height: 2.5px;
    }
}

/* Extra Small Phones - iPhone 5/SE - 320px */
@media (max-width: 320px) {
    .nav-container {
        padding: 5px 8px;
        gap: 4px;
    }

    .logo {
        gap: 8px;
    }

    .circle-logo {
        height: 35px;
        width: 35px;
        border-width: 2px;
    }

    .logo-text {
        font-size: 9px;
    }

    body.th .logo-text {
        font-size: 8.5px;
    }

    .nav-menu {
        top: 98px;
        padding: 10px 0;
    }

    .nav-menu a {
        padding: 10px 10px;
        font-size: 11px;
    }

    body.th .nav-menu a {
        font-size: 12px;
    }

    .mobile-menu {
        padding: 8px;
        min-width: 40px;
        min-height: 40px;
    }

    .mobile-menu span {
        width: 20px;
        height: 2px;
    }
}