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

:root {
    --primary: #25D366;
    --primary-dark: #128C7E;
    --accent: #34B7F1;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --surface: #1e293b;
    --surface-light: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
    --border: #334155;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--surface);
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-dark);
    border-radius: 0.5rem;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-secondary);
    animation: pulse 2s infinite;
}

.status.ready .status-indicator {
    background: var(--success);
}

.status.error .status-indicator {
    background: var(--error);
}

.status-text {
    font-size: 0.875rem;
    font-weight: 500;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* Card */
.card {
    background: var(--surface);
    border-radius: 1rem;
    padding: 2rem;
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Form */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.75rem;
}

.label-text {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.label-hint {
    display: block;
    font-size: 0.825rem;
    color: var(--text-secondary);
}

textarea {
    width: 100%;
    padding: 1rem;
    background: var(--bg-dark);
    border: 2px solid var(--border);
    border-radius: 0.75rem;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    resize: vertical;
    transition: all 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.1);
}

textarea::placeholder {
    color: var(--text-secondary);
}

.input-footer {
    margin-top: 0.5rem;
    font-size: 0.825rem;
    color: var(--text-secondary);
    text-align: right;
}

/* Upload Section */
.upload-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-dark);
    border-radius: 0.75rem;
    border: 2px dashed var(--border);
}

.btn-upload {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent) 0%, #0891b2 100%);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(52, 183, 241, 0.3);
}

.btn-upload:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 183, 241, 0.4);
}

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

.btn-upload:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.upload-hint {
    font-size: 0.825rem;
    color: var(--text-secondary);
}

/* Button */
.btn-primary {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-primary.loading .btn-text::after {
    content: '...';
    animation: dots 1.5s infinite;
}

@keyframes dots {

    0%,
    20% {
        content: '.';
    }

    40% {
        content: '..';
    }

    60%,
    100% {
        content: '...';
    }
}

/* Results */
.results-card {
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-dark);
    padding: 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-value.success {
    color: var(--success);
}

.stat-value.error {
    color: var(--error);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Results List */
.results-list {
    max-height: 400px;
    overflow-y: auto;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-dark);
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    border-left: 3px solid transparent;
}

.result-item.success {
    border-left-color: var(--success);
}

.result-item.failed {
    border-left-color: var(--error);
}

.result-number {
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

.result-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.result-status.success {
    color: var(--success);
}

.result-status.failed {
    color: var(--error);
}

/* Scrollbar */
.results-list::-webkit-scrollbar {
    width: 8px;
}

.results-list::-webkit-scrollbar-track {
    background: var(--bg-dark);
    border-radius: 4px;
}

.results-list::-webkit-scrollbar-thumb {
    background: var(--surface-light);
    border-radius: 4px;
}

.results-list::-webkit-scrollbar-thumb:hover {
    background: var(--border);
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .header {
        flex-direction: column;
        gap: 1rem;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: 1.5rem;
    }

    .stats {
        grid-template-columns: 1fr;
    }
}
/* QR Code Section */
.qr-card {
    animation: slideIn 0.3s ease;
}

.qr-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    background: white;
    border-radius: 0.75rem;
    margin-top: 1rem;
}

.qr-container pre {
    margin: 0;
    color: black;
}

/* Logs Section */
.logs-card {
    margin-top: 2rem;
}

.logs-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.logs-header h2 {
    margin: 0;
}

.btn-clear-logs {
    padding: 0.5rem 1rem;
    background: var(--error);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-clear-logs:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.logs-controls {
    margin-bottom: 1rem;
}

.auto-scroll-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.auto-scroll-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.logs-container {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1rem;
    max-height: 500px;
    overflow-y: auto;
    font-family: 'Courier New', Consolas, monospace;
    font-size: 0.875rem;
}

.log-entry {
    display: flex;
    gap: 1rem;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border);
    transition: background 0.2s ease;
}

.log-entry:last-child {
    border-bottom: none;
}

.log-entry:hover {
    background: var(--surface);
}

.log-time {
    color: var(--text-secondary);
    flex-shrink: 0;
    min-width: 80px;
}

.log-message {
    color: var(--text-primary);
    flex: 1;
    word-break: break-word;
}

/* Log levels */
.log-entry.info .log-message {
    color: var(--accent);
}

.log-entry.success .log-message {
    color: var(--success);
}

.log-entry.warning .log-message {
    color: var(--warning);
}

.log-entry.error .log-message {
    color: var(--error);
}

.log-entry.debug .log-message {
    color: var(--text-secondary);
}

/* Scrollbar for logs */
.logs-container::-webkit-scrollbar {
    width: 8px;
}

.logs-container::-webkit-scrollbar-track {
    background: var(--bg-darker);
    border-radius: 4px;
}

.logs-container::-webkit-scrollbar-thumb {
    background: var(--surface-light);
    border-radius: 4px;
}

.logs-container::-webkit-scrollbar-thumb:hover {
    background: var(--border);
}

/* Responsive for logs */
@media (max-width: 768px) {
    .logs-container {
        max-height: 300px;
        font-size: 0.75rem;
    }

    .log-time {
        min-width: 60px;
        font-size: 0.7rem;
    }

    .logs-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}