body {
    box-sizing: border-box;
}

.logo {
    width: 3rem;
}

.key-term {
    font-weight: bold;
    color: #2563eb; /* Indigo-600 */
}

.example-box {
    border-left: 4px solid #facc15; /* yellow */
    background-color: #fef9c3;
    padding: 8px 12px;
    margin: 6px 0;
}

.gradient-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.profile-card {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
    transition: all 0.3s ease;
}

.profile-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.shape {
    position: absolute;
    opacity: 0.1;
    animation: float 8s ease-in-out infinite;
}

.shape:nth-child(1) {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape:nth-child(2) {
    top: 70%;
    right: 15%;
    animation-delay: 3s;
}

.shape:nth-child(3) {
    bottom: 15%;
    left: 30%;
    animation-delay: 6s;
}

.shape:nth-child(4) {
    top: 30%;
    right: 30%;
    animation-delay: 1.5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeInUp 0.5s ease-out;
}

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

.input-field {
    transition: all 0.3s ease;
}

.input-field:focus {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.avatar-upload {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
}

.avatar-upload:hover {
    transform: scale(1.05);
}

.avatar-upload input {
    position: absolute;
    left: -9999px;
}

.avatar-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.avatar-upload:hover .avatar-overlay {
    opacity: 1;
}

.stat-card {
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.activity-item {
    transition: all 0.3s ease;
}

.activity-item:hover {
    background-color: #f8fafc;
    transform: translateX(5px);
}

.notification-toggle {
    transition: all 0.3s ease;
}

.notification-toggle.active {
    background: linear-gradient(135deg, #10b981, #059669);
}

.security-item {
    transition: all 0.3s ease;
}

.security-item:hover {
    background-color: #f9fafb;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring-circle {
    transition: stroke-dashoffset 0.5s ease-in-out;
}

.badge {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.save-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: all 0.3s ease;
}

.save-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.danger-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    transition: all 0.3s ease;
}

.danger-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(239, 68, 68, 0.3);
}

.achievement-badge {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 5px rgba(251, 191, 36, 0.5); }
    to { box-shadow: 0 0 20px rgba(251, 191, 36, 0.8); }
}

.skill-bar {
    transition: width 1s ease-in-out;
}

.loading-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}