/* SeminarHub - Futuristic Nexus Style CSS */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;600;700;800;900&family=Outfit:wght@300;400;500;600;700&display=swap');

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

:root {
    --bg-dark: #05070f;
    --bg-space: #0b0e1a;
    --primary-color: #00f2fe; /* Neon Cyan */
    --primary-dark: #00b8d4;
    --secondary-color: #9d4edd; /* Electric Purple */
    --secondary-dark: #7b2cbf;
    --accent-glow: rgba(0, 242, 254, 0.4);
    --accent-glow-purple: rgba(157, 78, 221, 0.4);
    
    --success-color: #00ff88; /* Neon Green */
    --danger-color: #ff3366; /* Vibrant Pink/Red */
    --warning-color: #ffb703; /* Bright Yellow */
    
    --text-primary: #f0f3ff; /* Crisp White */
    --text-secondary: #9aa8e8; /* Soft Indigo */
    --text-muted: #626e9e; /* Slate Blue */
    
    --border-color: rgba(0, 242, 254, 0.15);
    --border-hover: rgba(0, 242, 254, 0.4);
    --glass-bg: rgba(11, 15, 34, 0.7);
    --glass-blur: 15px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(0, 242, 254, 0.25);
    --shadow-glow-purple: 0 0 20px rgba(157, 78, 221, 0.25);
}

html, body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: radial-gradient(circle at 50% 0%, #101530 0%, var(--bg-dark) 70%);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    scroll-behavior: smooth;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: rgba(0, 242, 254, 0.2);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

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

/* Grid Tech Accents */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        linear-gradient(rgba(0, 242, 254, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 242, 254, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

/* Navigation */
.navbar {
    background: rgba(5, 7, 15, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4), 0 1px 0 var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Orbitron', sans-serif;
    font-weight: 800;
    font-size: 22px;
    letter-spacing: 1px;
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.brand-icon {
    font-size: 26px;
    filter: drop-shadow(0 0 8px var(--primary-color));
}

.brand-text {
    background: linear-gradient(90deg, #ffffff, var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-subtitle {
    font-size: 11px;
    font-weight: 500;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-left: 6px;
    border-left: 1px solid rgba(255, 255, 255, 0.2);
    padding-left: 10px;
    text-shadow: 0 0 8px rgba(157, 78, 221, 0.4);
}

.navbar-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color);
    text-shadow: 0 0 8px var(--accent-glow);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-user {
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.1), rgba(157, 78, 221, 0.1));
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-color);
    box-shadow: inset 0 0 8px rgba(0, 242, 254, 0.1);
    letter-spacing: 0.5px;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 140px 24px 100px;
    text-align: center;
    overflow: hidden;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 58px;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #ffffff 30%, var(--primary-color) 70%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5));
}

.hero-subtitle {
    font-size: 26px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.hero-description {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-background {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    z-index: 1;
    pointer-events: none;
}

.hero-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.25;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: -100px;
    left: 20%;
    animation: pulseGlow 10s ease-in-out infinite alternate;
}

.shape-2 {
    width: 350px;
    height: 350px;
    background: var(--secondary-color);
    bottom: -50px;
    right: 20%;
    animation: pulseGlow 12s ease-in-out infinite alternate-reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: #00ff88;
    top: 40%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.1;
    animation: pulseGlow 8s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
    0% { transform: scale(1) translateY(0); opacity: 0.2; }
    50% { transform: scale(1.15) translateY(-20px); opacity: 0.3; }
    100% { transform: scale(1) translateY(0); opacity: 0.2; }
}

/* Buttons */
.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #05070f;
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 242, 254, 0.4), 0 0 15px var(--accent-glow);
    color: #000;
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    box-shadow: none;
    cursor: not-allowed;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.03);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    box-shadow: inset 0 0 10px rgba(0, 242, 254, 0.05);
}

.btn-secondary:hover {
    background: rgba(0, 242, 254, 0.1);
    color: #fff;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.btn-danger {
    background: rgba(255, 51, 102, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(255, 51, 102, 0.25);
}

.btn-danger:hover {
    background: var(--danger-color);
    color: #05070f;
    box-shadow: 0 4px 15px rgba(255, 51, 102, 0.4);
}

.btn-success {
    background: rgba(0, 255, 136, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(0, 255, 136, 0.25);
}

.btn-success:hover {
    background: var(--success-color);
    color: #05070f;
    box-shadow: 0 4px 15px rgba(0, 255, 136, 0.4);
}

.btn-lg {
    padding: 18px 44px;
    font-size: 15px;
    border-radius: 14px;
}

.btn-block {
    width: 100%;
}

/* Sections */
.seminars-section,
.about-section {
    padding: 100px 24px;
    position: relative;
    z-index: 2;
}

.section-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 38px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
    background: linear-gradient(90deg, #ffffff, var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 60px;
}

/* Seminars Grid & Cards */
.seminars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 32px;
}

.seminar-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    position: relative;
}

.seminar-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
    padding: 1.5px;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.seminar-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: transparent;
}

.seminar-card:hover::before {
    opacity: 1;
}

.card-image {
    width: 100%;
    height: 210px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-dark), var(--bg-space));
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.seminar-card:hover .card-image img {
    transform: scale(1.08);
}

.card-image-placeholder {
    width: 100%;
    height: 210px;
    background: linear-gradient(135deg, rgba(16, 21, 48, 0.8), rgba(5, 7, 15, 0.9));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 54px;
    border-bottom: 1px solid var(--border-color);
}

.card-content {
    padding: 24px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-badge {
    margin-bottom: 16px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 30px;
    font-size: 11px;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.badge-available {
    background: rgba(0, 255, 136, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(0, 255, 136, 0.2);
}

.badge-limited {
    background: rgba(255, 183, 3, 0.1);
    color: var(--warning-color);
    border: 1px solid rgba(255, 183, 3, 0.2);
}

.badge-full {
    background: rgba(255, 51, 102, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(255, 51, 102, 0.2);
}

.card-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.3;
}

.card-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex-grow: 1;
    line-height: 1.5;
}

.card-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.detail-icon {
    font-size: 16px;
    filter: drop-shadow(0 0 4px var(--accent-glow));
}

.detail-text {
    flex-grow: 1;
    font-weight: 500;
}

.price {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 16px;
    color: var(--primary-color);
    text-shadow: 0 0 8px rgba(0, 242, 254, 0.3);
}

.reserve-btn {
    margin-top: auto;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 24px;
    background: rgba(11, 15, 34, 0.4);
    border-radius: 20px;
    border: 1px dashed var(--border-color);
    max-width: 600px;
    margin: 0 auto;
}

.empty-icon {
    font-size: 72px;
    display: block;
    margin-bottom: 24px;
    filter: drop-shadow(0 0 10px var(--accent-glow-purple));
}

.empty-message {
    font-family: 'Orbitron', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.empty-submessage {
    color: var(--text-muted);
    font-size: 14px;
}

/* About Section */
.about-section {
    background: radial-gradient(circle at 50% 100%, #161230 0%, var(--bg-dark) 80%);
}

.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.about-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
    padding: 36px 24px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.about-card:hover {
    transform: translateY(-6px);
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-glow-purple);
}

.about-icon {
    font-size: 44px;
    margin-bottom: 20px;
    display: inline-block;
    filter: drop-shadow(0 0 8px rgba(157, 78, 221, 0.4));
}

.about-card h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.about-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

/* Footer */
.footer {
    background: #03040a;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 50px 24px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.footer-links {
    margin-top: 20px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin: 0 12px;
    font-size: 13px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
    text-shadow: 0 0 5px var(--accent-glow);
}

/* Modal styling */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(3, 4, 10, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: radial-gradient(circle at top left, #121633, var(--bg-dark));
    border: 1px solid var(--border-color);
    border-radius: 24px;
    max-width: 620px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.7), var(--shadow-glow);
    position: relative;
    animation: slideUp 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    right: 24px;
    top: 24px;
    font-size: 26px;
    font-weight: bold;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.modal-close:hover {
    color: var(--primary-color);
    background: rgba(0, 242, 254, 0.1);
    border-color: var(--primary-color);
}

/* Registration Form UI inside modal */
.registration-container {
    padding: 48px;
}

.form-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(90deg, #ffffff, var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.form-subtitle {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 14px;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 13px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    border-radius: 12px;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(0, 242, 254, 0.03);
    box-shadow: 0 0 0 3px rgba(0, 242, 254, 0.15), inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.form-control:disabled {
    background: rgba(255, 255, 255, 0.02);
    border-color: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    cursor: not-allowed;
    box-shadow: none;
}

textarea.form-control {
    resize: vertical;
    min-height: 110px;
}

select.form-control {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%239aa8e8' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-position: right 14px center;
    background-repeat: no-repeat;
    background-size: 20px;
}

select.form-control option {
    background-color: var(--bg-dark);
    color: #fff;
}

/* Radio & Checkboxes */
.radio-group,
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.radio-label,
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    user-select: none;
    transition: color 0.3s ease;
}

.radio-label:hover,
.checkbox-label:hover {
    color: #fff;
}

.radio-label input[type="radio"],
.checkbox-label input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border: 1.5px solid var(--border-color);
    border-radius: 50%;
    outline: none;
    background: rgba(255, 255, 255, 0.02);
    display: inline-grid;
    place-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkbox-label input[type="checkbox"] {
    border-radius: 6px;
}

.radio-label input[type="radio"]::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 50%;
    transform: scale(0);
    transition: 0.2s transform ease-in-out;
    background-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.checkbox-label input[type="checkbox"]::before {
    content: "✓";
    font-size: 12px;
    font-weight: bold;
    color: #05070f;
    transform: scale(0);
    transition: 0.15s transform ease-in-out;
}

.radio-label input[type="radio"]:checked,
.checkbox-label input[type="checkbox"]:checked {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.checkbox-label input[type="checkbox"]:checked {
    background-color: var(--primary-color);
}

.radio-label input[type="radio"]:checked::before,
.checkbox-label input[type="checkbox"]:checked::before {
    transform: scale(1);
}

/* Steps Pipeline Indicators */
.steps-container {
    margin-bottom: 36px;
}

.steps {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.step {
    flex: 1;
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.step.active::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    animation: flowProgress 0.8s ease;
}

@keyframes flowProgress {
    from { width: 0; }
    to { width: 100%; }
}

.step-indicator {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 13px;
    transition: all 0.4s ease;
}

.step-number.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #05070f;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.step-number.completed {
    background: var(--success-color);
    color: #05070f;
    border-color: var(--success-color);
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.3);
}

/* Errors & System Messages */
.form-error {
    border-color: var(--danger-color) !important;
    box-shadow: 0 0 0 3px rgba(255, 51, 102, 0.15) !important;
}

.error-message {
    color: var(--danger-color);
    font-size: 12px;
    margin-top: 6px;
    display: block;
    font-weight: 500;
}

.success-message {
    background: rgba(0, 255, 136, 0.08);
    border: 1px solid rgba(0, 255, 136, 0.25);
    color: var(--success-color);
    padding: 14px 18px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 14px;
    box-shadow: 0 4px 12px rgba(0, 255, 136, 0.05);
}

.info-message {
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: var(--text-secondary);
    padding: 14px 18px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 14px;
    line-height: 1.5;
}

.danger-message {
    background: rgba(255, 51, 102, 0.08);
    border: 1px solid rgba(255, 51, 102, 0.25);
    color: var(--danger-color);
    padding: 14px 18px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 14px;
    line-height: 1.5;
}

/* Form Actions Layout */
.form-actions {
    display: flex;
    gap: 16px;
    margin-top: 36px;
}

.form-actions .btn {
    flex: 1;
}

/* Payment Methods Grid */
.payment-methods {
    display: grid;
    gap: 16px;
}

.payment-option {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.02);
    border-radius: 16px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    gap: 16px;
}

.payment-option:hover {
    border-color: var(--primary-color);
    background: rgba(0, 242, 254, 0.03);
}

.payment-option.selected {
    border-color: var(--primary-color);
    background: rgba(0, 242, 254, 0.06);
    box-shadow: var(--shadow-glow);
}

.payment-option input[type="radio"] {
    margin: 0;
}

.payment-option-info {
    flex: 1;
}

.payment-method-title {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.payment-method-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* File Upload drag-and-drop zone */
.file-upload-area {
    border: 2px dashed rgba(0, 242, 254, 0.25);
    background: rgba(0, 242, 254, 0.02);
    border-radius: 16px;
    padding: 36px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(0, 242, 254, 0.05);
    box-shadow: inset 0 0 15px rgba(0, 242, 254, 0.05);
}

.file-upload-area.dragover {
    border-color: var(--secondary-color);
    background: rgba(157, 78, 221, 0.05);
    box-shadow: inset 0 0 15px rgba(157, 78, 221, 0.05);
}

.file-upload-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: inline-block;
    filter: drop-shadow(0 0 6px var(--accent-glow));
}

.file-upload-text {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

.file-upload-text strong {
    color: var(--primary-color);
}

#fileInput {
    display: none;
}

.file-preview {
    margin-top: 16px;
    padding: 16px 20px;
    background: rgba(0, 255, 136, 0.04);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: scaleIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.file-preview-name {
    flex: 1;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    word-break: break-all;
}

.file-preview-remove {
    color: var(--danger-color);
    cursor: pointer;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: all 0.2s ease;
}

.file-preview-remove:hover {
    text-shadow: 0 0 8px var(--danger-color);
}

/* Success Details/Containers */
.success-container {
    text-align: center;
    padding: 40px 0 20px;
}

.success-icon {
    font-size: 72px;
    margin-bottom: 24px;
    display: inline-block;
    filter: drop-shadow(0 0 12px var(--success-color));
    animation: scaleIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

.success-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--success-color);
}

.success-message {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 15px;
}

.success-details {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 24px;
    border-radius: 16px;
    margin: 28px 0;
    text-align: left;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
}

.detail-value {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 14px;
}

/* Responsive queries */
@media (max-width: 768px) {
    .hero {
        padding: 100px 24px 70px;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .section-title {
        font-size: 30px;
    }

    .seminars-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .navbar-menu {
        gap: 20px;
    }

    .modal-content {
        width: 95%;
        max-height: 95vh;
    }

    .registration-container {
        padding: 32px 24px;
    }

    .form-actions {
        flex-direction: column-reverse;
        gap: 12px;
    }

    .form-actions .btn {
        width: 100%;
    }

    .hero-background {
        display: none;
    }

    .payment-option {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .payment-option input[type="radio"] {
        align-self: flex-start;
    }

    .detail-row {
        flex-direction: column;
        gap: 4px;
    }

    .detail-value {
        align-self: flex-start;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 16px 50px;
    }

    .hero-title {
        font-size: 30px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-description {
        font-size: 14px;
    }

    .section-title {
        font-size: 26px;
    }

    .section-subtitle {
        font-size: 14px;
        margin-bottom: 40px;
    }

    .card-content {
        padding: 20px;
    }

    .registration-container {
        padding: 24px 16px;
    }

    .form-label {
        font-size: 12px;
    }

    .form-control {
        padding: 12px 14px;
        font-size: 13px;
    }

    .navbar .container {
        flex-direction: column;
        gap: 12px;
        padding: 12px 16px;
    }

    .navbar-menu {
        width: 100%;
        justify-content: space-between;
        gap: 8px;
    }

    .nav-link {
        font-size: 12px;
    }
}