/**
 * ==============================================================================
 * Japan Shotokan Karate-Do Federation India (JSKFI)
 * Official Master Stylesheet
 * 
 * Architecture: Clean Corporate Standard
 * Description: International standard dynamic styles, glassmorphism,
 *              diploma certificate rendering, and micro-interactions.
 * Performance: Optimized for GTMetrix A+ Grade (0% CLS, Instant LCP)
 * ==============================================================================
 */

/* Smooth Page Scrolling & Base Typography */
html {
    scroll-behavior: smooth;
    overflow-x: clip;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: clip;
    position: relative;
}

/* Scroll Progress Bar at Top */
#scrollProgressBar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, #C8102E 0%, #D4AF37 50%, #99001A 100%);
    z-index: 100;
    width: 0%;
    transition: width 0.1s linear;
}

/* Traditional Kanji Background Watermark */
.kanji-watermark {
    user-select: none;
    pointer-events: none;
    font-family: 'Noto Serif JP', serif;
}

/* Modern Accessible Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #F8FAFC;
}

::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* Glassmorphism Classes */
.glass-header {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.glass-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(226, 232, 240, 0.8);
}

/* Card Transitions and Hover States */
.hover-lift {
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
}

/* Japanese Dan Certificate Stamp & Diploma Seal */
.certificate-diploma-border {
    background: #FCFBF7;
    border: 3px double #D4AF37;
    position: relative;
    box-shadow: 0 10px 30px -10px rgba(0,0,0,0.1), inset 0 0 40px rgba(212, 175, 55, 0.05);
}

.certificate-seal {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: radial-gradient(circle, #FEF9C3 0%, #FDE047 60%, #CA8A04 100%);
    border: 2px dashed #854D0E;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(202, 138, 4, 0.3);
}

/* Floating Action Pills (Ergonomic Cross-Device Spacing) */
.floating-actions {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 45;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

@media (max-width: 640px) {
    .floating-actions {
        bottom: 16px;
        right: 16px;
        gap: 10px;
    }
}

/* Nav Dropdown Transitions */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-menu {
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity 0.2s ease, transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.2s;
    pointer-events: none;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

/* Lightbox Modal Animation */
#imageLightbox {
    animation: lightboxFadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes lightboxFadeIn {
    from {
        opacity: 0;
        transform: scale(0.97);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ==============================================================================
 * Cross-Platform Responsiveness & Anti-Overflow Rules
 * Ensures perfect rendering across 320px mobile, iPads/tablets, 1366px laptops,
 * and high-DPI displays.
 * ============================================================================== */

*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    max-width: 100vw;
    overflow-x: clip;
}

/* Prevent image and iframe blowouts */
img, svg, video, canvas, audio, iframe, embed, object {
    display: block;
    max-width: 100%;
}

/* Prevent nav link wrapping on desktop */
#desktopNavLinks a {
    white-space: nowrap;
    flex-shrink: 0;
}

/* Responsive typography safeguards */
h1, h2, h3, h4 {
    overflow-wrap: break-word;
    word-break: normal;
}

/* ==============================================================================
 * Dan Certificate International Diploma A4 Landscape Print System
 * Strictly engineered to fit 1 single sheet in A4 Landscape format
 * ============================================================================== */
@page {
    size: A4 landscape;
    margin: 6mm 8mm;
}

@media print {
    /* Hide everything on the page except the diploma verification result or student ID card */
    html, body {
        width: 100% !important;
        height: auto !important;
        margin: 0 !important;
        padding: 0 !important;
        background: #ffffff !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    body * {
        visibility: hidden !important;
    }

    /* Verification Diploma on index.html */
    #verifyResult,
    #verifyResult * {
        visibility: visible !important;
    }

    /* Official Student ID Card on student-portal.html */
    #printableIdCardArea,
    #printableIdCardArea *,
    .student-id-print-sheet,
    .student-id-print-sheet * {
        visibility: visible !important;
    }

    #verifyResult {
        display: block !important;
        position: absolute !important;
        left: 0 !important;
        top: 0 !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        border: none !important;
        box-shadow: none !important;
    }

    #printableIdCardArea {
        display: block !important;
        position: absolute !important;
        left: 0 !important;
        top: 0 !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        background: #ffffff !important;
    }

    .no-print,
    .no-print * {
        display: none !important;
        visibility: hidden !important;
    }

    /* Outer Diploma Container: Strictly sized to 1 single A4 Landscape sheet without spilling */
    .certificate-diploma-border.diploma-print-sheet {
        position: relative !important;
        width: 281mm !important;
        max-width: 281mm !important;
        height: 194mm !important;
        max-height: 194mm !important;
        margin: 0 auto !important;
        padding: 4mm 7mm !important;
        border: 4px double #D4AF37 !important;
        border-radius: 10px !important;
        box-shadow: none !important;
        box-sizing: border-box !important;
        background: #FCFBF7 !important;
        page-break-inside: avoid !important;
        page-break-before: avoid !important;
        page-break-after: avoid !important;
        break-inside: avoid !important;
        overflow: hidden !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: space-between !important;
    }

    /* Traditional Seal stamp positioned neatly in print */
    .certificate-diploma-border.diploma-print-sheet .diploma-seal-container {
        top: 4mm !important;
        right: 6mm !important;
    }
    .certificate-diploma-border.diploma-print-sheet .certificate-seal {
        width: 48px !important;
        height: 48px !important;
        box-shadow: none !important;
    }

    /* Header styling for print */
    .certificate-diploma-border.diploma-print-sheet .diploma-header {
        padding-bottom: 2mm !important;
        margin-bottom: 1mm !important;
        border-bottom: 1px solid rgba(212, 175, 55, 0.4) !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-header img {
        width: 42px !important;
        height: 42px !important;
        margin: 0 auto 1px auto !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-header h3 {
        font-size: 18px !important;
        line-height: 1.15 !important;
        margin-top: 1px !important;
        margin-bottom: 1px !important;
        color: #00186B !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-header .diploma-kanji {
        font-size: 10px !important;
        letter-spacing: 0.25em !important;
        margin-bottom: 1px !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-header .diploma-auth-badge {
        font-size: 8.5px !important;
        padding: 1px 8px !important;
        margin-top: 2px !important;
        border-width: 1px !important;
    }

    /* Candidate and Rank Details in print: horizontal side-by-side grid */
    .certificate-diploma-border.diploma-print-sheet .diploma-body {
        padding: 2mm 0 !important;
        margin: 0 !important;
        display: grid !important;
        grid-template-columns: 88px 1fr !important;
        gap: 5mm !important;
        align-items: center !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-avatar-wrap {
        width: 84px !important;
        height: 98px !important;
        margin-bottom: 2px !important;
        padding: 2px !important;
        border-radius: 8px !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-avatar-wrap img {
        border-radius: 6px !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-cert-no {
        font-size: 8.5px !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-certify-text {
        font-size: 9.5px !important;
        line-height: 1.35 !important;
        margin-bottom: 2px !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-candidate-name {
        font-size: 21px !important;
        line-height: 1.15 !important;
        margin-bottom: 2px !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-rank-card {
        padding: 2mm 3.5mm !important;
        margin: 2mm 0 !important;
        border-radius: 6px !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-rank-text {
        font-size: 16px !important;
        line-height: 1.15 !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-meta-grid {
        font-size: 9px !important;
        line-height: 1.25 !important;
        gap: 2mm !important;
        padding-top: 1mm !important;
    }

    /* Signatures bar in print: 3 columns anchored at bottom */
    .certificate-diploma-border.diploma-print-sheet .diploma-signatures {
        padding-top: 2mm !important;
        border-top: 1px solid rgba(212, 175, 55, 0.4) !important;
        display: grid !important;
        grid-template-columns: 1fr 130px 1fr !important;
        gap: 3mm !important;
        align-items: end !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-signatures .sig-name {
        font-size: 12px !important;
        line-height: 1.1 !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-signatures .sig-title {
        font-size: 8px !important;
        line-height: 1.2 !important;
        margin-top: 1px !important;
        padding-top: 1px !important;
    }
    .certificate-diploma-border.diploma-print-sheet .diploma-signatures .sig-badge {
        font-size: 8px !important;
        padding: 1px 6px !important;
    }
}

/* ==============================================================================
 * Global Modal Dialogs Z-Index Hierarchy
 * All overlay modals, backdrops and lightboxes MUST render strictly above the
 * permanently frozen header (.frozen-header-root has z-index: 1000).
 * ============================================================================== */
.fixed.inset-0,
[id$="Modal"],
#imageLightbox,
#createNewsModal,
#newsAuthRequiredModal,
#eventRegistrationModal,
#idCardPrintModal,
#registrationPendingModal,
#forgotPasswordModal,
#danModal,
#promoteBeltModal,
#viewStudentModal,
#customTabModal,
#dojoModal,
#galleryAddModal,
#eventModal,
#instructorModal,
#danCsvModal {
    z-index: 99999 !important;
}

/* ==============================================================================
 * Permanently Frozen Header System (Logo, Name & Modules)
 * ============================================================================== */
.frozen-header-root {
    position: -webkit-sticky !important;
    position: sticky !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: 1000 !important;
    background: #ffffff;
    box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
    transition: box-shadow 0.25s ease, background-color 0.25s ease;
}

.frozen-header-root.is-scrolled {
    box-shadow: 0 10px 30px -4px rgba(0, 24, 107, 0.15), 0 4px 12px -2px rgba(0, 0, 0, 0.06);
}

.locked-header {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.9);
    transition: all 0.25s ease;
}

.nav-link {
    position: relative;
    padding: 6px 10px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 13px;
    color: #334155;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.nav-link:hover {
    color: #BA0C2F;
    background: rgba(186, 12, 47, 0.06);
}

.nav-link.active, .nav-link-active {
    color: #BA0C2F !important;
    font-weight: 700 !important;
    background: rgba(186, 12, 47, 0.08);
}

.nav-link.active::after, .nav-link-active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 20%;
    right: 20%;
    height: 2.5px;
    background: linear-gradient(90deg, #BA0C2F 0%, #D4AF37 100%);
    border-radius: 9999px;
}

/* ==============================================================================
 * Vibrant Martial Arts Animated Backgrounds (60 FPS Performance Optimized)
 * ============================================================================== */

/* Ambient Shifting Mesh Gradient Backdrop */
.animated-mesh-bg {
    background: linear-gradient(135deg, #0f172a 0%, #001A72 45%, #1e1b4b 75%, #0f172a 100%);
    background-size: 300% 300%;
    animation: gradientShift 18s ease infinite alternate;
    position: relative;
    overflow: hidden;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Light Mode Animated Aura Backdrop */
.animated-light-aura {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 50%, #F1F5F9 100%);
}

.animated-light-aura::before {
    content: '';
    position: absolute;
    top: -150px;
    right: -100px;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(186, 12, 47, 0.12) 0%, rgba(212, 175, 55, 0.06) 50%, transparent 70%);
    filter: blur(60px);
    pointer-events: none;
    animation: floatAura1 12s ease-in-out infinite alternate;
    z-index: 0;
}

.animated-light-aura::after {
    content: '';
    position: absolute;
    bottom: -120px;
    left: -100px;
    width: 450px;
    height: 450px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 26, 114, 0.1) 0%, rgba(186, 12, 47, 0.05) 50%, transparent 70%);
    filter: blur(50px);
    pointer-events: none;
    animation: floatAura2 15s ease-in-out infinite alternate;
    z-index: 0;
}

@keyframes floatAura1 {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-40px, 60px) scale(1.12); }
    100% { transform: translate(30px, 40px) scale(0.95); }
}

@keyframes floatAura2 {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(50px, -40px) scale(1.08); }
    100% { transform: translate(-20px, -60px) scale(0.92); }
}

/* Floating Radiant Aura Orbs (Absolute positioning within parent relative container) */
.orb-glow-crimson {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(186, 12, 47, 0.35) 0%, rgba(186, 12, 47, 0.08) 55%, transparent 75%);
    filter: blur(45px);
    pointer-events: none;
    animation: orbFloat 14s ease-in-out infinite alternate;
}

.orb-glow-navy {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 26, 114, 0.4) 0%, rgba(0, 26, 114, 0.08) 55%, transparent 75%);
    filter: blur(45px);
    pointer-events: none;
    animation: orbFloatRev 16s ease-in-out infinite alternate;
}

.orb-glow-gold {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.35) 0%, rgba(212, 175, 55, 0.08) 55%, transparent 75%);
    filter: blur(40px);
    pointer-events: none;
    animation: orbPulse 8s ease-in-out infinite alternate;
}

@keyframes orbFloat {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(60px, -40px) scale(1.2); }
}

@keyframes orbFloatRev {
    0% { transform: translate(0, 0) scale(1.15); }
    100% { transform: translate(-50px, 45px) scale(0.9); }
}

@keyframes orbPulse {
    0% { transform: scale(0.95); opacity: 0.6; }
    50% { transform: scale(1.15); opacity: 0.9; }
    100% { transform: scale(1); opacity: 0.7; }
}

/* Subtle Animated Tatami Geometric Grid Pattern */
.bg-tatami-grid {
    background-image: 
        radial-gradient(rgba(186, 12, 47, 0.08) 1px, transparent 1px),
        radial-gradient(rgba(0, 26, 114, 0.06) 1px, transparent 1px);
    background-size: 32px 32px;
    background-position: 0 0, 16px 16px;
}

/* Traditional Japanese Kanji Ambient Floating Watermark */
.kanji-float {
    position: absolute;
    font-family: 'Noto Serif JP', serif;
    font-weight: 900;
    line-height: 1;
    user-select: none;
    pointer-events: none;
    opacity: 0.04;
    transition: opacity 0.5s ease;
    animation: kanjiDrift 20s ease-in-out infinite alternate;
}

@keyframes kanjiDrift {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(1.5deg); }
    100% { transform: translateY(10px) rotate(-1deg); }
}

/* Hero Shimmering Energy Line */
.energy-beam {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, #BA0C2F 25%, #D4AF37 50%, #001A72 75%, transparent 100%);
    background-size: 200% 100%;
    animation: beamGlide 6s linear infinite;
}

@keyframes beamGlide {
    0% { background-position: -100% 0; }
    100% { background-position: 100% 0; }
}

/* Vibrant Pulsing Indicator */
.pulse-indicator {
    display: inline-flex;
    position: relative;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #BA0C2F;
}

.pulse-indicator::before {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background-color: #BA0C2F;
    opacity: 0.75;
    animation: pulseRing 1.8s cubic-bezier(0.24, 0, 0.38, 1) infinite;
}

@keyframes pulseRing {
    0% { transform: scale(0.9); opacity: 0.8; }
    70% { transform: scale(2.4); opacity: 0; }
    100% { transform: scale(2.6); opacity: 0; }
}

/* Interactive Card Elevate & Subtle Border Glow */
.card-vibrant {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 1.5rem;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.card-vibrant:hover {
    transform: translateY(-4px);
    border-color: rgba(186, 12, 47, 0.4);
    box-shadow: 0 16px 36px -8px rgba(186, 12, 47, 0.1), 0 4px 12px rgba(0, 0, 0, 0.04);
}