/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    --dark: #1f2937;
    --darker: #111827;
    --light: #f8fafc;
    --gray: #6b7280;
    --gray-light: #e5e7eb;
    --success: #10b981;
    
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-dark: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Poppins', sans-serif;
    background: var(--gradient-dark);
    color: var(--light);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background */
.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary), transparent);
    opacity: 0.1;
    animation: float 20s infinite linear;
}

.shape:nth-child(1) {
    width: 300px;
    height: 300px;
    top: -150px;
    left: -150px;
    animation-delay: 0s;
}

.shape:nth-child(2) {
    width: 200px;
    height: 200px;
    top: 20%;
    right: -100px;
    animation-delay: -5s;
    background: linear-gradient(45deg, var(--secondary), transparent);
}

.shape:nth-child(3) {
    width: 250px;
    height: 250px;
    bottom: -125px;
    left: 10%;
    animation-delay: -10s;
    background: linear-gradient(45deg, var(--info), transparent);
}

.shape:nth-child(4) {
    width: 180px;
    height: 180px;
    bottom: 20%;
    right: 10%;
    animation-delay: -15s;
    background: linear-gradient(45deg, var(--warning), transparent);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    33% {
        transform: translateY(-30px) rotate(120deg);
    }
    66% {
        transform: translateY(30px) rotate(240deg);
    }
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo i {
    font-size: 32px;
}

.firebase-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.firebase-status i {
    color: var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 30px;
    flex: 1;
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Cards */
.card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-xl);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl), 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.card-header {
    margin-bottom: 25px;
}

.card-header h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-header h2 i {
    color: var(--primary);
}

.card-header p {
    color: var(--gray-light);
    font-size: 14px;
    opacity: 0.8;
}

/* Form Styles */
.form-group {
    position: relative;
    margin-bottom: 25px;
}

.input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
    transition: var(--transition);
    z-index: 2;
}

.form-group textarea + .input-icon {
    top: 25px;
    transform: none;
}

input, textarea {
    width: 100%;
    padding: 15px 15px 15px 50px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--light);
    font-size: 16px;
    transition: var(--transition);
    font-family: inherit;
}

textarea {
    min-height: 120px;
    resize: vertical;
    padding-top: 20px;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input:focus + .input-icon,
textarea:focus + .input-icon {
    color: var(--primary);
}

.focus-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
    border-radius: 2px;
}

input:focus ~ .focus-line,
textarea:focus ~ .focus-line {
    width: 100%;
}

/* Submit Button */
.submit-btn {
    position: relative;
    width: 100%;
    padding: 16px 24px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
}

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

.btn-text {
    display: inline-block;
    transition: var(--transition);
}

.btn-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: none;
}

.btn-icon {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    transition: var(--transition);
}

.submit-btn:hover .btn-icon {
    transform: translateY(-50%) translateX(5px);
}

.submit-btn.loading .btn-text {
    opacity: 0;
}

.submit-btn.loading .btn-loader {
    display: block;
}

/* Status Message */
.status-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    display: none;
    animation: slideDown 0.3s ease;
}

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

.status-message.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.status-message.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

/* Preview Card */
.preview-content {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--border-radius);
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.preview-content pre {
    color: var(--light);
    font-family: 'Courier New', monospace;
    font-size: 14px;
    white-space: pre-wrap;
    margin: 0;
    line-height: 1.5;
}

/* Data Section */
.data-stats {
    display: flex;
    gap: 20px;
    margin-top: 15px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-light);
}

.stat-item i {
    color: var(--primary);
}

.data-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.search-box {
    position: relative;
    flex: 1;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

.search-box input {
    padding-left: 45px;
}

.refresh-btn {
    padding: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--light);
    cursor: pointer;
    transition: var(--transition);
}

.refresh-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: rotate(180deg);
}

/* Loader */
.loader {
    text-align: center;
    padding: 40px 20px;
    display: none;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-left: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

.loader-spinner.large {
    width: 60px;
    height: 60px;
    border-width: 4px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Stored Data */
.stored-data {
    max-height: 500px;
    overflow-y: auto;
}

.stored-data::-webkit-scrollbar {
    width: 6px;
}

.stored-data::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}

.stored-data::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
}

.data-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 15px;
    transition: var(--transition);
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.data-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(5px);
}

.data-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.uid {
    font-weight: 600;
    font-size: 18px;
    color: var(--primary);
}

.expiry {
    font-size: 14px;
    color: var(--gray-light);
    background: rgba(245, 158, 11, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.expiry.expired {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.comment {
    color: var(--gray-light);
    font-style: italic;
    margin-bottom: 15px;
    padding-left: 5px;
}

.actions {
    display: flex;
    gap: 10px;
}

.btn-edit, .btn-delete {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-edit {
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.3);
    color: var(--info);
}

.btn-edit:hover {
    background: rgba(6, 182, 212, 0.2);
    transform: translateY(-2px);
}

.btn-delete {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.btn-delete:hover {
    background: rgba(239, 68, 68, 0.2);
    transform: translateY(-2px);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-light);
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 20px;
    margin-bottom: 10px;
    font-weight: 500;
}

.empty-state p {
    font-size: 14px;
    opacity: 0.7;
}

/* Footer */
.footer {
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.tech-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 152, 0, 0.1);
    border: 1px solid rgba(255, 152, 0, 0.3);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.tech-badge i {
    color: #FFA000;
}

.app-info {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 14px;
    color: var(--gray-light);
}

.divider {
    opacity: 0.3;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .main-content {
        gap: 20px;
    }
    
    .card {
        padding: 20px;
    }
    
    .data-stats {
        flex-direction: column;
        gap: 10px;
    }
    
    .data-controls {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 20px;
    }
    
    .logo i {
        font-size: 24px;
    }
    
    .card-header h2 {
        font-size: 18px;
    }
    
    input, textarea {
        padding: 12px 12px 12px 45px;
    }
    
    .data-header {
        flex-direction: column;
        gap: 10px;
    }
    
    .actions {
        flex-direction: column;
    }
}