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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
}

.startup-screen,
.welcome-screen,
.admin-screen {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 20px;
}

.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #f5576c 75%, #4facfe 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    z-index: -2;
}

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

.floating-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.3;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 200px;
    height: 200px;
    background: #ff6b6b;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    background: #4ecdc4;
    top: 60%;
    right: 10%;
    animation-delay: -5s;
}

.shape-3 {
    width: 100px;
    height: 100px;
    background: #ffe66d;
    bottom: 20%;
    left: 20%;
    animation-delay: -10s;
}

.shape-4 {
    width: 180px;
    height: 180px;
    background: #95e1d3;
    top: 30%;
    right: 30%;
    animation-delay: -15s;
}

.shape-5 {
    width: 120px;
    height: 120px;
    background: #f38181;
    bottom: 30%;
    right: 20%;
    animation-delay: -7s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(30px, -30px) rotate(90deg); }
    50% { transform: translate(0, -50px) rotate(180deg); }
    75% { transform: translate(-30px, -30px) rotate(270deg); }
}

.content {
    text-align: center;
    z-index: 1;
    max-width: 500px;
    width: 100%;
}

.title {
    font-size: 3rem;
    color: white;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
    margin-bottom: 10px;
    animation: slideDown 1s ease;
}

.subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
    animation: slideDown 1s ease 0.2s both;
}

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

.code-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    animation: slideDown 1s ease 0.4s both;
}

#codeInput {
    padding: 20px;
    font-size: 2rem;
    text-align: center;
    border: 3px solid white;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    letter-spacing: 10px;
    outline: none;
    transition: all 0.3s ease;
}

#codeInput:focus {
    background: white;
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

#codeInput::placeholder {
    color: #999;
    letter-spacing: 10px;
}

.btn-see {
    padding: 15px 50px;
    font-size: 1.2rem;
    background: white;
    color: #667eea;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.btn-see:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.btn-see:active {
    transform: translateY(0);
}

.message {
    margin-top: 20px;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 1rem;
    animation: fadeIn 0.3s ease;
}

.message.error {
    background: rgba(255, 107, 107, 0.9);
    color: white;
}

.message.success {
    background: rgba(78, 205, 196, 0.9);
    color: white;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.admin-btn {
    position: fixed;
    bottom: 15px;
    right: 15px;
    padding: 8px 15px;
    font-size: 0.7rem;
    background: rgba(0, 0, 0, 0.3);
    color: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 100;
}

.admin-btn:hover {
    background: rgba(0, 0, 0, 0.5);
    color: white;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    animation: slideDown 0.3s ease;
    position: relative;
}

.modal-content h2 {
    color: #667eea;
    margin-bottom: 20px;
}

.modal-content input {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
    text-align: center;
}

.modal-content input:focus {
    border-color: #667eea;
    outline: none;
}

.modal-content button {
    width: 100%;
    padding: 15px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.modal-content button:hover {
    background: #764ba2;
}

.modal-content #adminMessage {
    margin-top: 15px;
    font-size: 0.9rem;
}

.close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 1.5rem;
    color: #999;
    cursor: pointer;
    transition: color 0.3s ease;
    z-index: 10;
}

.close:hover {
    color: #333;
}

.success-icon {
    width: 100px;
    height: 100px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #4ecdc4;
    margin: 0 auto 20px;
    animation: bounce 1s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

@keyframes bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.welcome-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.admin-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.btn-admin {
    padding: 15px 30px;
    font-size: 1rem;
    background: white;
    color: #667eea;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.btn-admin:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.btn-logout {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.btn-logout:hover {
    background: rgba(255, 255, 255, 0.3);
}

.codes-section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.codes-section h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.codes-list {
    max-height: 300px;
    overflow-y: auto;
}

.generate-code-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.generate-code-group select {
    padding: 12px 16px;
    border: 2px solid rgba(255,255,255,0.5);
    border-radius: 50px;
    background: rgba(255,255,255,0.2);
    color: white;
    font-size: 1rem;
    cursor: pointer;
    outline: none;
}

.generate-code-group select option {
    color: #333;
    background: white;
}

.code-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: #f8f9fa;
    border-radius: 10px;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.code-item:hover {
    background: #e9ecef;
}

.code-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
    letter-spacing: 5px;
}

.code-date {
    font-size: 0.8rem;
    color: #666;
}

.code-delete {
    padding: 8px 15px;
    background: #ff6b6b;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: background 0.3s ease;
}

.code-delete:hover {
    background: #ee5a5a;
}

.new-code-display {
    padding: 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 15px;
    margin-bottom: 20px;
    animation: pulse 2s infinite;
}

.new-code-display .code-value {
    color: white;
    font-size: 2rem;
}

.new-code-display p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

@media (max-width: 600px) {
    .title {
        font-size: 2.2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    #codeInput {
        font-size: 1.5rem;
        padding: 15px;
    }

    .btn-see {
        padding: 12px 40px;
        font-size: 1rem;
    }

    .admin-btn {
        font-size: 0.6rem;
        padding: 6px 10px;
    }

    .modal-content {
        padding: 25px;
    }

    .admin-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn-admin {
        width: 100%;
    }

    .contact-row {
        padding: 10px 12px;
    }
}

.level-badge {
    display: inline-block;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    margin-bottom: 15px;
    color: white;
}

.contact-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 30px;
    margin: 20px 0;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    text-align: left;
    animation: slideDown 0.8s ease 0.3s both;
}

.contact-card-header {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.contact-avatar {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin: 0 auto 10px;
    font-weight: bold;
}

.contact-card-header h2 {
    color: #333;
    font-size: 1.5rem;
    margin: 0;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.contact-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    background: #f8f9fa;
    border-radius: 12px;
    transition: background 0.3s ease;
}

.contact-row:hover {
    background: #e9ecef;
}

.contact-icon {
    font-size: 1.3rem;
    width: 30px;
    text-align: center;
    flex-shrink: 0;
}

.contact-row a,
.contact-row span {
    color: #333;
    font-size: 1rem;
    word-break: break-word;
}

.contact-row a {
    color: #667eea;
    text-decoration: none;
}

.contact-row a:hover {
    text-decoration: underline;
}

.admin-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    overflow: hidden;
    animation: slideDown 1s ease 0.1s both;
}

.tab-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: rgba(255, 255, 255, 0.95);
    color: #667eea;
    border-radius: 15px;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.contacts-section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.contacts-section h2 {
    color: #667eea;
    margin-bottom: 5px;
    font-size: 1.3rem;
}

.hint {
    color: #888;
    font-size: 0.85rem;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    color: #555;
    font-size: 0.9rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: #f8f9fa;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: #667eea;
    outline: none;
    background: white;
}

.form-group textarea {
    resize: vertical;
    font-family: inherit;
}

.btn-save {
    width: 100%;
    margin-top: 10px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.btn-save:hover {
    background: linear-gradient(135deg, #764ba2, #667eea);
}

.forgot-link {
    display: block;
    margin-top: 15px;
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.forgot-link:hover {
    color: #764ba2;
    text-decoration: underline;
}

.reset-form {
    text-align: center;
}

.reset-form input {
    box-sizing: border-box;
}