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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Floating geometric shapes */
.geometric-shape {
    position: absolute;
    opacity: 0.1;
    animation: float 8s ease-in-out infinite;
    z-index: 1;
}

.shape-1 {
    width: 120px;
    height: 120px;
    background: white;
    border-radius: 20px;
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.shape-2 {
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 50%;
    top: 20%;
    right: 10%;
    animation-delay: 2s;
}

.shape-3 {
    width: 100px;
    height: 100px;
    background: white;
    transform: rotate(45deg);
    top: 60%;
    left: 8%;
    animation-delay: 4s;
}

.shape-4 {
    width: 60px;
    height: 60px;
    background: white;
    border-radius: 15px;
    top: 70%;
    right: 15%;
    animation-delay: 6s;
}

.shape-calculator {
    position: absolute;
    top: 15%;
    right: 5%;
    font-size: 80px;
    opacity: 0.08;
    color: white;
    animation: float 10s ease-in-out infinite;
    animation-delay: 1s;
}

.shape-book {
    position: absolute;
    bottom: 20%;
    left: 3%;
    font-size: 60px;
    opacity: 0.08;
    color: white;
    animation: float 12s ease-in-out infinite;
    animation-delay: 3s;
}

.shape-atom {
    position: absolute;
    top: 40%;
    right: 3%;
    font-size: 70px;
    opacity: 0.08;
    color: white;
    animation: float 9s ease-in-out infinite;
    animation-delay: 5s;
}

.shape-computer {
    position: absolute;
    bottom: 30%;
    right: 8%;
    font-size: 65px;
    opacity: 0.08;
    color: white;
    animation: float 11s ease-in-out infinite;
    animation-delay: 2s;
}

.shape-pen {
    position: absolute;
    top: 50%;
    left: 2%;
    font-size: 55px;
    opacity: 0.08;
    color: white;
    animation: float 13s ease-in-out infinite;
    animation-delay: 4s;
}

.shape-graph {
    position: absolute;
    bottom: 10%;
    right: 20%;
    font-size: 75px;
    opacity: 0.08;
    color: white;
    animation: float 14s ease-in-out infinite;
    animation-delay: 1.5s;
}

@keyframes float {
    0%, 100% { 
        transform: translateY(0) rotate(0deg) scale(1); 
    }
    33% { 
        transform: translateY(-30px) rotate(5deg) scale(1.05); 
    }
    66% { 
        transform: translateY(20px) rotate(-3deg) scale(0.95); 
    }
}

/* Main container */
.main-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 10;
    padding: 20px;
}

/* Content card */
.content-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 32px;
    padding: 60px;
    max-width: 600px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #ff6b6b, #ffa500, #667eea, #764ba2);
    background-size: 300% 100%;
    animation: gradientShift 3s ease-in-out infinite;
}

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

/* Logo */
.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.logo-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    animation: pulse 2s ease-in-out infinite;
}

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

.logo-text {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Main heading */
.main-heading {
    font-size: 48px;
    font-weight: 800;
    color: #1a1a1a;
    margin-bottom: 16px;
    line-height: 1.2;
}

.main-heading .highlight {
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Subtitle */
.subtitle {
    font-size: 18px;
    color: #6b7280;
    margin-bottom: 48px;
    line-height: 1.6;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

/* Subject tags */
.subject-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}

.subject-tag {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 20px;
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 600;
    color: #667eea;
    transition: all 0.3s ease;
}

.subject-tag:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
    transform: translateY(-2px);
}

/* Exam type selector */
.exam-selector {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 20px;
    padding: 8px;
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

.exam-option {
    flex: 1;
    padding: 12px 24px;
    border-radius: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #667eea;
}

.exam-option.active {
    background: white;
    color: #1a1a1a;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Action buttons */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.btn-primary {
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
    color: white;
    border: none;
    border-radius: 16px;
    padding: 16px 32px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 8px 30px rgba(255, 107, 107, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(255, 107, 107, 0.6);
}

.btn-secondary {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 16px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.4);
    transform: translateY(-2px);
}

/* Stats section */
.stats-section {
    display: flex;
    justify-content: space-around;
    padding-top: 32px;
    border-top: 1px solid #e5e7eb;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 28px;
    font-weight: 800;
    color: #1a1a1a;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 12px;
    color: #9ca3af;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .content-card {
        padding: 40px 30px;
        margin: 20px;
    }

    .main-heading {
        font-size: 36px;
    }

    .logo-text {
        font-size: 24px;
    }

    .subject-tags {
        gap: 8px;
    }

    .subject-tag {
        font-size: 12px;
        padding: 6px 16px;
    }

    .stats-section {
        flex-direction: column;
        gap: 20px;
    }

    .geometric-shape,
    .shape-calculator,
    .shape-book,
    .shape-atom,
    .shape-computer,
    .shape-pen,
    .shape-graph {
        display: none;
    }
}

/* Loading animation */
.loading {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

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