:root {
    --primary-blue: #4285f4;
    --navy-dark: #0a192f;
    --light-blue-bg: #f0f7ff;
    --card-bg: #ffffff;
    --text-dark: #2c3e50;
    --text-grey: #5d6d7e;
    --white: #ffffff;
    --accent-blue: #3b71ca;
}

/* Premium S1000D Title Section */
.s1000d-title-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin: 80px 0;
    position: relative;
    padding: 20px 0;
}

.s1000d-title-wrapper::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 100px;
    background: radial-gradient(circle, rgba(66, 133, 244, 0.15) 0%, transparent 70%);
    z-index: -1;
    filter: blur(20px);
}

.s1000d-title {
    background: linear-gradient(90deg, #1a237e, #4285f4, #00c2ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 2.8rem;
    font-weight: 900;
    white-space: nowrap;
    letter-spacing: -0.5px;
    padding: 0 40px;
    position: relative;
    animation: floatingTitle 3s ease-in-out infinite;
}

@keyframes floatingTitle {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

.s1000d-title-wrapper .line-arrow-left,
.s1000d-title-wrapper .line-arrow-right {
    height: 2px;
    flex-grow: 1;
    position: relative;
    max-width: 300px;
    background: linear-gradient(90deg, rgba(66, 133, 244, 0), rgba(66, 133, 244, 1));
}

.s1000d-title-wrapper .line-arrow-right {
    background: linear-gradient(90deg, rgba(66, 133, 244, 1), rgba(66, 133, 244, 0));
}

/* Shimmer animation for headers */
.s1000d-title-wrapper .line-arrow-left::after,
.s1000d-title-wrapper .line-arrow-right::before {
    content: '';
    position: absolute;
    top: 0;
    width: 60px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
    animation: lineShimmer 2s infinite linear;
}

@keyframes lineShimmer {
    0% {
        left: -100px;
    }

    100% {
        left: 100%;
    }
}

.s1000d-title-wrapper .line-arrow-left::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 0;
    width: 12px;
    height: 12px;
    border-top: 2px solid #4285f4;
    border-right: 2px solid #4285f4;
    transform: rotate(-135deg);
    box-shadow: -2px -2px 5px rgba(66, 133, 244, 0.3);
}

.s1000d-title-wrapper .line-arrow-right::after {
    content: '';
    position: absolute;
    top: -5px;
    right: 0;
    width: 12px;
    height: 12px;
    border-top: 2px solid #4285f4;
    border-right: 2px solid #4285f4;
    transform: rotate(45deg);
    box-shadow: 2px -2px 5px rgba(66, 133, 244, 0.3);
}

.s1000d-title-wrapper .line-arrow-left::after {
    left: auto !important;
    right: 0 !important;
    width: 6px;
    height: 6px;
    background: #4285f4;
    border-radius: 50%;
    top: -2px;
    animation: none !important;
}

.s1000d-title-wrapper .line-arrow-right::before {
    left: 0 !important;
    width: 6px;
    height: 6px;
    background: #4285f4;
    border-radius: 50%;
    top: -2px;
    animation: none !important;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--light-blue-bg);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    padding-top: 80px;
    /* Space for fixed header */
}

/* Header & Navigation (Unified) */
header.site-header {
    width: 100%;
    padding: 15px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    position: fixed;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-text h1 {
    font-size: 1.15rem;
    font-weight: 800;
    color: #1a202c;
    letter-spacing: -0.2px;
    line-height: 1;
    margin-bottom: 2px;
}

.logo-text span {
    font-size: 0.75rem;
    color: #718096;
    font-weight: 500;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
    align-items: center;
}

.main-nav ul li a {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.main-nav ul li a:hover {
    color: #00c2ff;
}

.nav-item-dropdown {
    position: relative;
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-item-dropdown i {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.nav-item-dropdown:hover i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 220px;
    box-shadow: 0 16px 40px rgba(2, 6, 23, 0.12);
    border-radius: 14px;
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px) scale(0.98);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
    list-style: none;
    z-index: 1000;
    border: 1px solid rgba(15, 23, 42, 0.08);
}

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

.dropdown-menu li a {
    display: block;
    padding: 8px 12px;
    color: #4a5568 !important;
    text-decoration: none;
    font-size: 0.85rem;
    transition: all 0.2s ease;
    border-radius: 10px;
}

.dropdown-menu li a:hover {
    background: rgba(0, 194, 255, 0.12);
    color: #00c2ff !important;
}

/* Understanding S1000D Section */
.understanding-s1000d {
    background-color: #e0faff;
    border-radius: 20px;
    padding: 60px;
    margin-bottom: 40px;
}

.under-container h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 25px;
    font-weight: 800;
    text-transform: uppercase;
}

.blue-text {
    color: #4285f4;
}

.orange-text {
    color: #ff6b35;
}

.sub-info {
    margin-top: 35px;
}

.sub-info h4 {
    font-size: 1.25rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 700;
}

.blue-dots {
    list-style: none;
    padding-left: 20px;
    margin: 15px 0;
}

.blue-dots li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    font-size: 0.95rem;
    color: #5d6d7e;
}

.blue-dots li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #4285f4;
    font-weight: bold;
    font-size: 1.2rem;
}

/* Tech Visualization Section */
.tech-vis-section {
    margin-bottom: 40px;
}

.tech-vis-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.tech-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.tech-card img {
    width: 100%;
    display: block;
    height: 350px;
    object-fit: cover;
}

/* Authoring Section */
.authoring-section {
    background-color: #e0faff;
    border-radius: 20px;
    padding: 60px;
    margin-bottom: 60px;
}

.footer-note {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.footer-note p {
    font-size: 1rem;
    color: #2c3e50;
    line-height: 1.6;
}

/* Information Sets Section */
.info-sets-section {
    background-color: #d1e3ff;
    border-radius: 25px;
    padding: 60px;
    margin-bottom: 60px;
}

.info-sets-container h3 {
    font-size: 1.5rem;
    color: #4a5568;
    margin-bottom: 40px;
    font-weight: 800;
    text-transform: uppercase;
    text-align: center;
}

.info-sets-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.info-column {
    flex: 1;
}

.info-column ul {
    list-style: none;
    padding: 0;
}

.info-column ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    font-size: 0.95rem;
    color: #2c3e50;
    font-weight: 600;
}

.info-column ul li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #4285f4;
    font-weight: bold;
    font-size: 1.2rem;
}

.info-image {
    flex: 1.2;
    background: #e0e0e0;
    border-radius: 15px;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.info-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

@media (max-width: 992px) {
    .info-sets-content {
        flex-direction: column;
        gap: 30px;
    }

    .info-image {
        order: -1;
    }
}

@media (max-width: 768px) {

    .understanding-s1000d,
    .authoring-section {
        padding: 30px 20px;
    }

    .tech-vis-grid {
        grid-template-columns: 1fr;
    }

    .experience-section {
        padding: 40px 20px;
    }
}

.characteristics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.char-block {
    background: linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);
    border: 1px solid rgba(66, 133, 244, 0.1);
    border-radius: 12px;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
}

.char-block:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(66, 133, 244, 0.1);
    border-color: rgba(66, 133, 244, 0.3);
    background: linear-gradient(135deg, #ffffff 0%, #e3f2fd 100%);
}

.char-block i {
    color: #4285f4;
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.char-block span {
    font-size: 0.9rem;
    color: #5d6d7e;
    font-weight: 500;
    line-height: 1.4;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(rgba(10, 25, 47, 0.8), rgba(10, 25, 47, 0.8)), url('Assests/s1000d.png');
    background-size: cover;
    background-position: center;
    height: 450px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white);
    padding: 0 20px;
    border-bottom-left-radius: 40px;
    border-bottom-right-radius: 40px;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero-section p {
    font-size: 1.25rem;
    max-width: 800px;
    opacity: 0.9;
}

/* Container */
.container {
    max-width: 1200px;
    margin: -80px auto 80px;
    padding: 0 20px;
}

/* Info Card */
.info-card {
    background: var(--white);
    border-radius: 20px;
    padding: 60px;
    box-shadow: 0 20px 40px rgba(0, 50, 150, 0.08);
    margin-bottom: 40px;
}

.info-card h2 {
    font-size: 2.2rem;
    color: var(--text-dark);
    margin-bottom: 30px;
    font-weight: 800;
}

.info-card p {
    font-size: 1.1rem;
    color: var(--text-grey);
    margin-bottom: 25px;
    line-height: 1.8;
}

/* Experience Section */
.experience-section {
    background-color: #d1e3ff;
    border-radius: 25px;
    padding: 60px;
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 60px;
}

.experience-content {
    flex: 1;
}

.experience-content h2 {
    font-size: 3.5rem;
    font-weight: 900;
    color: #4a5568;
    line-height: 1.1;
    margin-bottom: 30px;
    text-transform: uppercase;
}

.experience-content p {
    font-size: 1.1rem;
    color: #5d6d7e;
}

.experience-video-box {
    flex: 1.2;
    position: relative;
    border-radius: 12px;
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: 12px;
}

.youtube-embed-container {
    position: relative;
    width: 100%;
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.experience-video-box .youtube-embed-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.youtube-embed-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 12px;
}

@media (max-width: 768px) {
    .youtube-embed-container {
        height: 250px;
    }
}

@media (max-width: 480px) {
    .youtube-embed-container {
        height: 200px;
    }
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.play-button:hover {
    scale: 1.1;
}

.play-button svg {
    width: 35px;
    height: 35px;
    fill: white;
}

/* Certification Section Styles */
/* Revamped Certification Title Section */
.cert-title-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 25px;
    margin: 60px 0 40px;
    position: relative;
    width: 100%;
}

.cert-line-decor {
    height: 2px;
    width: 60px;
    background: linear-gradient(90deg, transparent, #4285f4);
    border-radius: 2px;
    opacity: 0.6;
}

.cert-title-wrapper .cert-line-decor:last-child {
    background: linear-gradient(90deg, #4285f4, transparent);
}

.cert-content-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 35px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(66, 133, 244, 0.3);
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(66, 133, 244, 0.15);
    backdrop-filter: blur(5px);
    transition: all 0.3s ease;
    animation: certPulse 3s infinite ease-in-out;
}

.cert-content-box:hover {
    box-shadow: 0 6px 20px rgba(66, 133, 244, 0.25);
    transform: translateY(-2px);
    border-color: #4285f4;
}

.cert-icon {
    width: 24px;
    height: 24px;
    color: #4285f4;
}

.cert-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2c3e50;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0;
    white-space: nowrap;
    background: linear-gradient(90deg, #1a237e, #4285f4);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

@keyframes certPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(66, 133, 244, 0.4);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(66, 133, 244, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(66, 133, 244, 0);
    }
}

/* Fallback for removed arrows to ensure they are gone */
.line-arrow-left,
.line-arrow-right {
    display: none;
}

.certification-section {
    background: linear-gradient(180deg, #e0faff 0%, #ffffff 100%);
    padding: 80px 40px;
    border-radius: 40px;
    margin-top: 40px;
    width: 100%;
}

.cert-logos-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 50px;
}

.cert-card {
    background: white;
    border: 1.5px solid #a0d8ef;
    border-radius: 15px;
    padding: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 140px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
    transition: transform 0.3s ease;
}

.cert-card:hover {
    transform: translateY(-5px);
    border-color: #4285f4;
}

.cert-card img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.company-intro-card {
    background: white;
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.company-intro-card p {
    color: #5d6d7e;
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 25px;
    text-align: justify;
}

.company-intro-card p:last-child {
    margin-bottom: 0;
}

@media (max-width: 992px) {

    .line-arrow-left,
    .line-arrow-right {
        display: none;
    }

    .cert-logos-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .cert-logos-grid {
        grid-template-columns: 1fr;
    }
}

/* Footer & Other Styles copied for completion */
.site-footer {
    background: linear-gradient(rgba(11, 18, 34, 0.9), rgba(11, 18, 34, 0.9)), url('Assests/ietm-footer.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: 100px 0 0;
}

.footer-card {
    background: #4a86f7;
    border-radius: 4px;
    padding: 60px 40px;
    max-width: 1200px;
    margin: 0 auto;
    color: white;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 992px) {
    .experience-section {
        flex-direction: column;
        padding: 40px 20px;
        text-align: center;
    }
}