/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #000000;
    color: #FFFFFF;
    overflow-x: hidden;
}

/* ========================================
   PROFESSIONAL ANIMATIONS
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(220, 20, 60, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(220, 20, 60, 0.8), 0 0 30px rgba(220, 20, 60, 0.6);
    }
}

/* ========================================
   LANDING PAGE - EXACT MATCH
   ======================================== */

.landing-page {
    position: relative;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    background-color: #0a0a0a;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bg-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    opacity: 0.4;
    z-index: 1;
}

/* Radial gradient overlay - creates the light burst effect */
.bg-radial-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(139, 115, 85, 0.15) 0%, rgba(0, 0, 0, 0.95) 70%);
    z-index: 2;
}

.landing-content {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* Logo */
.landing-logo {
    margin-bottom: 20px;
    animation: fadeIn 1s ease-in;
}

.landing-logo img {
    height: 100px;
    width: 100px;
    object-fit: contain;
}

/* Subtitle - INTELLIGENCE RESEARCH INSTITUTE */
.landing-subtitle {
    font-size: 11px;
    letter-spacing: 0.4em;
    color: rgba(139, 115, 85, 0.8);
    text-transform: uppercase;
    font-weight: 400;
    margin-bottom: 25px;
    animation: fadeIn 1.2s ease-in 0.2s both;
}

/* Main Title */
.landing-title {
    text-align: center;
    line-height: 0.85;
    font-family: 'Oswald', 'Bebas Neue', sans-serif;
    margin-bottom: 20px;
    animation: fadeIn 1.4s ease-in 0.4s both;
}

.title-main {
    display: block;
    font-size: clamp(60px, 15vw, 180px);
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: #FFFFFF;
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
    margin-bottom: 0;
    line-height: 0.9;
}

.title-accent {
    display: block;
    font-size: clamp(60px, 15vw, 180px);
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: #DC3545;
    text-shadow: 0 0 40px rgba(220, 53, 69, 0.5);
    line-height: 0.9;
}

/* Tagline - Business in the Era of Artificial Intelligence */
.landing-tagline {
    text-align: center;
    font-size: clamp(14px, 2.5vw, 20px);
    font-style: italic;
    color: #FFFFFF;
    font-weight: 400;
    margin-bottom: 30px;
    animation: fadeIn 1.6s ease-in 0.6s both;
    max-width: 600px;
}

/* Decorative Line */
.decorative-line {
    width: 80px;
    height: 1px;
    background-color: rgba(255, 255, 255, 0.3);
    margin: 0 auto 30px;
    animation: expandWidth 1.8s ease-in 0.8s both;
}

@keyframes expandWidth {
    from {
        width: 0;
    }
    to {
        width: 80px;
    }
}

/* Quote */
.landing-quote {
    text-align: center;
    font-size: clamp(13px, 2vw, 16px);
    font-weight: 400;
    color: #FFFFFF;
    letter-spacing: 0.05em;
    margin-bottom: 40px;
    animation: fadeIn 2s ease-in 1s both;
    max-width: 700px;
    line-height: 1.6;
}

/* Enter Button */
.btn-enter {
    background-color: #DC3545;
    color: #FFFFFF;
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-weight: 600;
    padding: 14px 40px;
    border: none;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    animation: fadeIn 2.2s ease-in 1.2s both;
}

.btn-enter::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-enter:hover::before {
    width: 300px;
    height: 300px;
}

.btn-enter:hover {
    background-color: #B8303E;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(220, 53, 69, 0.5);
}

.btn-enter:active {
    transform: translateY(-1px);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   MAIN EXPERIENCE (SPLIT SCREEN) - EXACT MATCH
   ======================================== */

.main-experience {
    display: flex;
    height: 100vh;
    width: 100%;
}

.split-section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 50%;
    padding: 60px 40px;
    opacity: 0;
    animation: fadeIn 0.8s ease-out forwards;
}

.conference-section {
    background-color: #0d1b2a;
    animation-delay: 0.2s;
}

.journal-section {
    background-color: #e8e4d9;
    animation-delay: 0.4s;
}

.split-content {
    max-width: 500px;
    text-align: center;
}

/* Logo */
.split-logo {
    margin-bottom: 40px;
}

.split-logo img {
    height: 90px;
    width: 90px;
    object-fit: contain;
}

/* Meta Info */
.split-info {
    margin-bottom: 50px;
}

.split-meta {
    font-size: 10px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    font-weight: 400;
    margin-bottom: 8px;
    line-height: 1.6;
}

.conference-section .split-meta {
    color: rgba(255, 255, 255, 0.5);
}

.journal-section .split-meta {
    color: rgba(0, 0, 0, 0.5);
}

/* Title */
.split-title {
    font-family: 'Oswald', 'Bebas Neue', sans-serif;
    margin-bottom: 40px;
    line-height: 0.9;
}

.split-title-word {
    display: block;
    font-size: clamp(50px, 8vw, 90px);
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    line-height: 0.95;
}

.conference-section .split-title-word {
    color: #FFFFFF;
}

.journal-section .split-title-word {
    color: #1a1a1a;
}

/* Description */
.split-description {
    font-size: clamp(12px, 1.5vw, 15px);
    font-style: italic;
    line-height: 1.7;
    margin-bottom: 50px;
}

.conference-section .split-description {
    color: rgba(255, 255, 255, 0.7);
}

.journal-section .split-description {
    color: rgba(0, 0, 0, 0.6);
}

/* Buttons */
.btn-split-conference,
.btn-split-journal {
    font-size: 10px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    font-weight: 600;
    padding: 12px 28px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background-color: transparent;
    position: relative;
    overflow: hidden;
}

.btn-split-conference::before,
.btn-split-journal::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(220, 53, 69, 0.1);
    transition: left 0.5s ease;
}

.btn-split-conference:hover::before,
.btn-split-journal:hover::before {
    left: 0;
}

.btn-split-conference {
    border: 1.5px solid #DC3545;
    color: #DC3545;
}

.btn-split-conference:hover {
    background-color: #DC3545;
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(220, 53, 69, 0.3);
}

.btn-split-journal {
    border: 1.5px solid #DC3545;
    color: #DC3545;
}

.btn-split-journal:hover {
    background-color: #DC3545;
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(220, 53, 69, 0.3);
}

.btn-split-conference:active,
.btn-split-journal:active {
    transform: translateY(0) scale(0.98);
}

/* ========================================
   HEADER (for registration page)
   ======================================== */

.header {
    background-color: #0A0A0A;
    border-bottom: 1px solid #1e1e1e;
    padding: 20px 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-mit {
    height: 23px;
    width: auto;
}

.logo-beacon {
    height: 28px;
    width: 28px;
}

.logo-text {
    font-size: 14px;
    letter-spacing: 0.2em;
    color: #FFFFFF;
    text-transform: uppercase;
    font-weight: 700;
    font-family: 'Bebas Neue', sans-serif;
}

.btn-register {
    background-color: #DC3545;
    color: #FFFFFF;
    font-size: 10px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    font-weight: 700;
    padding: 12px 24px;
    border: none;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-register:hover {
    background-color: #B82A37;
}

/* ========================================
   HERO SECTION (for registration page)
   ======================================== */

.hero-label {
    font-size: 12px;
    letter-spacing: 0.35em;
    color: #B8956A;
    text-transform: uppercase;
    display: block;
    margin-bottom: 20px;
}

.hero-title {
    font-family: 'Bebas Neue', sans-serif;
    line-height: 0.88;
    margin-bottom: 24px;
}

.hero-title-main {
    display: block;
    font-size: clamp(42px, 6vw, 110px);
    font-weight: 700;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: #FFFFFF;
}

.hero-title-accent {
    display: block;
    font-size: clamp(42px, 6vw, 110px);
    font-weight: 700;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: #D4AF37;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
    .landing-logo img {
        height: 70px;
        width: 70px;
    }

    .landing-subtitle {
        font-size: 9px;
        letter-spacing: 0.3em;
    }

    .title-main,
    .title-accent {
        font-size: clamp(40px, 12vw, 100px);
    }

    .landing-tagline {
        font-size: 13px;
        padding: 0 20px;
    }

    .landing-quote {
        font-size: 12px;
        padding: 0 20px;
    }

    .btn-enter {
        font-size: 10px;
        padding: 12px 30px;
    }

    /* Split Screen Mobile */
    .main-experience {
        flex-direction: column;
    }

    .split-section {
        width: 100% !important;
        height: 50vh;
        padding: 40px 24px;
    }

    .split-logo img {
        height: 60px;
        width: 60px;
    }

    .split-info {
        margin-bottom: 30px;
    }

    .split-meta {
        font-size: 9px;
    }

    .split-title {
        margin-bottom: 30px;
    }

    .split-title-word {
        font-size: clamp(40px, 10vw, 70px);
    }

    .split-description {
        font-size: 13px;
        margin-bottom: 35px;
    }

    .btn-split-conference,
    .btn-split-journal {
        font-size: 9px;
        padding: 10px 24px;
    }
}

@media (max-width: 480px) {
    .landing-logo img {
        height: 60px;
        width: 60px;
    }

    .landing-subtitle {
        font-size: 8px;
        letter-spacing: 0.25em;
    }

    .title-main,
    .title-accent {
        font-size: clamp(35px, 10vw, 80px);
    }

    .landing-tagline {
        font-size: 12px;
    }

    .landing-quote {
        font-size: 11px;
    }

    .decorative-line {
        width: 60px;
    }

    /* Split Screen Small Mobile */
    .split-logo img {
        height: 50px;
        width: 50px;
    }

    .split-meta {
        font-size: 8px;
    }

    .split-title-word {
        font-size: clamp(35px, 9vw, 60px);
    }

    .split-description {
        font-size: 12px;
    }
}