/* ==========================================================================
   Nesshin Japanese Language Institute (熱心日本語学院) - Design System & Styles
   Primary Theme: Crimson Red (#C8102E), Obsidian Black (#111111), Sakura Off-White (#FDFBFB)
   ========================================================================== */

:root {
    --color-crimson: #C8102E;
    --color-crimson-hover: #A50D24;
    --color-crimson-subtle: rgba(200, 16, 46, 0.12);
    --color-obsidian: #111111;
    --color-dark-card: #1A1A1A;
    --color-dark-obsidian: #0D0D0D;
    --color-sakura-light: #FDFBFB;
    --color-sakura-muted: #CCCCCC;
    --color-gold: #D4AF37;
    
    --font-primary: 'Outfit', sans-serif;
    --font-jp: 'Noto Sans JP', sans-serif;
    
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 45px rgba(200, 16, 46, 0.12);
    --transition-smooth: all 0.35s cubic-bezier(0.165, 0.84, 0.44, 1);
}

html, body {
    font-family: var(--font-primary);
    color: #2D2D2D;
    background-color: #FFFFFF;
    overflow-x: hidden !important;
    max-width: 100% !important;
    width: 100%;
    position: relative;
    line-height: 1.6;
}

main, section, header, footer, .hero-section, .about-section, .courses-section, .news-section, .visa-section, .why-section, .testimonials-section, .contact-section, .footer-section {
    max-width: 100% !important;
    overflow-x: hidden !important;
    position: relative;
}

img, iframe, video, object, embed, table {
    max-width: 100% !important;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    color: var(--color-obsidian);
}

.text-crimson {
    color: var(--color-crimson) !important;
}

.bg-crimson {
    background-color: var(--color-crimson) !important;
}

.bg-crimson-subtle {
    background-color: var(--color-crimson-subtle) !important;
}

.bg-obsidian {
    background-color: var(--color-obsidian) !important;
}

.bg-dark-obsidian {
    background-color: var(--color-dark-obsidian) !important;
}

.bg-dark-card {
    background-color: var(--color-dark-card) !important;
}

.bg-sakura-light {
    background-color: var(--color-sakura-light) !important;
}

.text-sakura-light {
    color: var(--color-sakura-light) !important;
}

.text-sakura-muted {
    color: var(--color-sakura-muted) !important;
}

.tracking-wide {
    letter-spacing: 0.08em;
}

/* ==========================================================================
   DYNAMIC PRELOADER
   ========================================================================== */
.preloader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100% !important;
    height: 100vh;
    background: #FFFFFF;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.preloader-wrapper.preloader-fadeout {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-img {
    width: 110px;
    height: auto;
    animation: pulseSun 1.8s infinite ease-in-out;
}

.preloader-kanji {
    font-family: var(--font-jp);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-obsidian);
    letter-spacing: 4px;
}

.preloader-subtitle {
    font-size: 0.85rem;
    color: #666;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.preloader-progress-box {
    width: 180px;
    height: 4px;
    background: #EAEAEA;
    border-radius: 4px;
    margin: 0 auto;
    overflow: hidden;
}

.preloader-progress-bar {
    width: 30%;
    height: 100%;
    background: var(--color-crimson);
    border-radius: 4px;
    animation: progressLoad 1.5s infinite ease-in-out;
}

.preloader-status {
    font-size: 0.78rem;
    color: #888;
}

@keyframes pulseSun {
    0%, 100% { transform: scale(1); filter: drop-shadow(0 0 0 rgba(200, 16, 46, 0)); }
    50% { transform: scale(1.08); filter: drop-shadow(0 8px 20px rgba(200, 16, 46, 0.3)); }
}

@keyframes progressLoad {
    0% { transform: translateX(-100%); width: 30%; }
    50% { width: 70%; }
    100% { transform: translateX(350%); width: 30%; }
}

/* ==========================================================================
   TOP STRIP & NAVIGATION
   ========================================================================== */
.top-strip {
    background-color: #F8F9FA;
    border-bottom: 1px solid #EDEDED;
    font-size: 0.78rem;
}

.top-link {
    color: var(--color-obsidian);
    transition: color 0.2s ease;
}
.top-link:hover {
    color: var(--color-crimson);
}

.btn-whatsapp {
    background-color: #25D366;
    color: #FFFFFF;
    font-weight: 600;
    transition: all 0.25s ease;
}
.btn-whatsapp:hover {
    background-color: #1EBE5B;
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(37, 211, 102, 0.3);
}

.navbar-wrapper {
    z-index: 1030;
}

.brand-logo {
    height: 44px;
    width: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}
.navbar-brand:hover .brand-logo {
    transform: scale(1.05);
}

.brand-name-jp {
    font-family: var(--font-jp);
    font-size: 0.95rem;
    font-weight: 700;
    color: #FFFFFF;
    line-height: 1.2;
}

.brand-name-en {
    font-size: 0.65rem;
    color: var(--color-sakura-muted);
    letter-spacing: 0.8px;
    text-transform: uppercase;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-size: 0.84rem !important;
    font-weight: 500;
    padding: 0.35rem 0.6rem !important;
    position: relative;
    transition: color 0.25s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #FFFFFF !important;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--color-crimson);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    transform: scaleX(1);
}

.btn-crimson {
    background-color: var(--color-crimson);
    color: #FFFFFF;
    border: 2px solid var(--color-crimson);
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-crimson:hover {
    background-color: var(--color-crimson-hover);
    border-color: var(--color-crimson-hover);
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(200, 16, 46, 0.35);
}

.btn-outline-crimson {
    color: var(--color-crimson);
    border: 2px solid var(--color-crimson);
    background: transparent;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-outline-crimson:hover {
    background: var(--color-crimson);
    color: #FFFFFF;
    box-shadow: 0 6px 15px rgba(200, 16, 46, 0.25);
}

/* ==========================================================================
   HERO SLIDER SECTION
   ========================================================================== */
.hero-section {
    height: 720px;
    max-height: 85vh;
    background-color: var(--color-obsidian);
}

.kanji-watermark {
    position: absolute;
    right: -2%;
    bottom: -10%;
    font-family: var(--font-jp);
    font-size: 28rem;
    font-weight: 900;
    color: #FFFFFF;
    opacity: 0.035;
    pointer-events: none;
    z-index: 1;
    line-height: 1;
    user-select: none;
}

.hero-slide {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

h1.hero-title,
.hero-title {
    color: #FFFFFF !important;
    font-weight: 900 !important;
    text-shadow: 0 4px 24px rgba(0, 0, 0, 0.95), 0 2px 8px rgba(0, 0, 0, 0.9) !important;
    line-height: 1.18;
    letter-spacing: -0.01em;
}

.hero-subtitle {
    color: #FDFBFB !important;
    font-weight: 500 !important;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.9), 0 1px 4px rgba(0, 0, 0, 0.8) !important;
}

.hero-badge {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    font-size: 0.9rem;
}

.btn-hero-primary {
    background-color: var(--color-crimson);
    color: #FFFFFF;
    border: none;
    transition: var(--transition-smooth);
}
.btn-hero-primary:hover {
    background-color: var(--color-crimson-hover);
    color: #FFFFFF;
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(200, 16, 46, 0.45) !important;
}

.btn-hero-outline {
    background: rgba(255, 255, 255, 0.12);
    color: #FFFFFF;
    border: 2px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(6px);
    transition: var(--transition-smooth);
}
.btn-hero-outline:hover {
    background: #FFFFFF;
    color: var(--color-obsidian);
    border-color: #FFFFFF;
    transform: translateY(-3px);
}

/* Swiper Navigation Customization */
.swiper-button-next,
.swiper-button-prev {
    width: 50px !important;
    height: 50px !important;
    background: rgba(17, 17, 17, 0.6);
    backdrop-filter: blur(6px);
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-smooth);
}

.swiper-button-next:hover,
.swiper-button-prev:hover {
    background: var(--color-crimson);
    border-color: var(--color-crimson);
}

.swiper-button-next::after,
.swiper-button-prev::after {
    font-size: 1.2rem !important;
    font-weight: 700;
}

.swiper-pagination-bullet {
    width: 10px;
    height: 10px;
    background: #FFFFFF !important;
    opacity: 0.4;
    transition: all 0.3s ease;
}

.swiper-pagination-bullet-active {
    width: 28px;
    border-radius: 6px;
    background: var(--color-crimson) !important;
    opacity: 1;
}

/* ==========================================================================
   ABOUT & WHY CHOOSE US CARDS
   ========================================================================== */
.about-badge-floating {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: #FFFFFF;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    z-index: 5;
    border-top: 4px solid var(--color-crimson);
}

.section-badge {
    font-size: 0.85rem;
    font-weight: 700;
}

.course-card,
.why-card,
.testimonial-card,
.cultural-card {
    transition: var(--transition-smooth);
}

.course-card:hover,
.why-card:hover,
.testimonial-card:hover,
.cultural-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg) !important;
    border-color: rgba(200, 16, 46, 0.3) !important;
}

.cultural-card:hover img {
    transform: scale(1.05);
}

.transition-smooth {
    transition: var(--transition-smooth) !important;
}

.shadow-md {
    box-shadow: var(--shadow-md) !important;
}

.object-fit-cover {
    object-fit: cover !important;
}


.course-icon-box {
    width: 54px;
    height: 54px;
    transition: var(--transition-smooth);
}

.course-card:hover .course-icon-box {
    background: var(--color-crimson) !important;
}
.course-card:hover .course-icon-box i {
    color: #FFFFFF !important;
}

/* ==========================================================================
   VISA SECTION
   ========================================================================== */
.visa-step {
    transition: var(--transition-smooth);
}
.visa-step:hover {
    transform: translateX(6px);
    background: rgba(255, 255, 255, 0.08) !important;
}

/* ==========================================================================
   FOOTER & BACK TO TOP
   ========================================================================== */
.footer-logo {
    height: 50px;
    width: auto;
}

.footer-links li a {
    color: var(--color-sakura-muted);
    text-decoration: none;
    transition: color 0.25s ease, transform 0.25s ease;
    display: inline-block;
}

.footer-links li a:hover {
    color: #FFFFFF;
    transform: translateX(4px);
}

.social-icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.social-icon-btn:hover {
    background: var(--color-crimson);
    color: #FFFFFF;
    transform: translateY(-3px);
}

.back-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-crimson);
    color: #FFFFFF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    text-decoration: none;
    z-index: 1020;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
}

.back-to-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top-btn:hover {
    background: var(--color-obsidian);
    color: #FFFFFF;
    transform: translateY(-4px);
}

/* Responsive Adjustments */
@media (max-width: 991.98px) {
    .hero-section {
        height: 600px;
    }
    .hero-title {
        font-size: 2.5rem !important;
    }
    .kanji-watermark {
        font-size: 14rem;
        right: 0;
        bottom: 0;
    }
    .about-badge-floating {
        right: 10px;
        bottom: 10px;
    }
}
@media (max-width: 767.98px) {
    .row {
        max-width: 100% !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
    }
    .row > * {
        padding-left: calc(var(--bs-gutter-x) * 0.5);
        padding-right: calc(var(--bs-gutter-x) * 0.5);
    }
}
@media (max-width: 575.98px) {
    .hero-section {
        height: 540px;
    }
    .hero-title {
        font-size: 1.85rem !important;
        line-height: 1.25 !important;
    }
    .hero-subtitle {
        font-size: 1.05rem !important;
    }
    .kanji-watermark {
        font-size: 8rem;
        right: 0;
        bottom: 0;
    }
    .about-badge-floating {
        position: relative;
        bottom: auto;
        right: auto;
        margin-top: -20px;
        margin-bottom: 20px;
        display: inline-block;
    }
    .hero-buttons .btn,
    .btn-hero-primary,
    .btn-hero-outline {
        width: 100% !important;
        justify-content: center !important;
    }
    .swiper-button-next,
    .swiper-button-prev {
        display: none !important;
    }
    .contact-info-card,
    .form-card {
        padding: 1.5rem !important;
    }
}

/* ==========================================================================
   LATEST NEWS & CULTURAL EVENTS ANIMATIONS (`熱心`)
   ========================================================================== */
.news-card {
    transition: all 0.35s cubic-bezier(0.165, 0.84, 0.44, 1);
    border: 1px solid rgba(0, 0, 0, 0.05) !important;
}

.news-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.12) !important;
    border-color: rgba(200, 16, 46, 0.25) !important;
}

.news-img-container {
    height: 280px;
    background-color: #111111;
}

.news-flyer-img {
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.news-card:hover .news-flyer-img {
    transform: scale(1.08);
}

.news-hover-overlay {
    background: rgba(17, 17, 17, 0.55);
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.news-card:hover .news-hover-overlay {
    opacity: 1;
}

.cursor-pointer {
    cursor: pointer;
}

.transition-zoom {
    transition: transform 0.5s ease;
}

.btn-outline-crimson {
    color: var(--color-crimson);
    border: 1.5px solid var(--color-crimson);
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-outline-crimson:hover {
    background: var(--color-crimson);
    color: #FFFFFF;
    transform: translateY(-2px);
}

/* ==========================================================================
   GALLERY SECTION
   ========================================================================== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.50rem;
}

.gallery-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    height: 250px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    cursor: pointer;
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(200, 16, 46, 0.15);
    border-color: rgba(200, 16, 46, 0.3);
}

.gallery-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.gallery-item:hover .gallery-img {
    transform: scale(1.08);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(17, 17, 17, 0.9) 0%, rgba(17, 17, 17, 0.2) 60%, rgba(17, 17, 17, 0.4) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    opacity: 0;
    transition: opacity 0.35s ease;
    z-index: 2;
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-zoom-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    width: 54px;
    height: 54px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: 1.5rem;
    transition: all 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
}

.gallery-item:hover .gallery-zoom-icon {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.gallery-caption {
    transform: translateY(10px);
    transition: transform 0.35s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.gallery-item:hover .gallery-caption {
    transform: translateY(0);
}

/* Lightbox Modal Customization */
.lightbox-modal .modal-content {
    background: transparent;
    border: none;
}

.lightbox-modal .modal-backdrop {
    background-color: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(12px);
}

.lightbox-modal-dialog {
    max-width: 900px;
    margin: 1.75rem auto;
}

.lightbox-img-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background-color: #000;
}

.lightbox-img {
    max-height: 75vh;
    width: 100%;
    object-fit: contain;
}

.lightbox-control-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-smooth);
    z-index: 10;
    border: none;
}

.lightbox-control-btn:hover {
    background: var(--color-crimson);
    border-color: var(--color-crimson);
    color: #FFFFFF;
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    z-index: 10;
    border: none;
}

.lightbox-close:hover {
    background: var(--color-crimson);
    border-color: var(--color-crimson);
}