:root {
    --primary-color: #4f85e5;
    --primary-hover: #3b6bbf;
    --bg-color: #f0f2f5;
    --card-bg: #ffffff;
    --text-primary: #1c1e21;
    --text-secondary: #606770;
    --border-color: #e4e6eb;
    --sidebar-bg: #ffffff;
    --sidebar-text: #606770;
    --sidebar-hover-bg: #f2f2f2;
    --sidebar-active-bg: #e7f3ff;
    --sidebar-active-text: #1877f2;
    --success-color: #2e8b57;
    --success-bg: #e6f4ea;
    --error-color: #dc3545;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 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);
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #28a745;
    font-size: 20px;
    font-weight: 700;
}

.logo ion-icon {
    font-size: 28px;
}

.user-profile {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-bottom: 10px;
    background-color: #e4e6eb;
}

.greeting {
    font-size: 14px;
    color: var(--text-secondary);
}

.greeting strong {
    color: #28a745;
}

.menu-section {
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.menu-section:last-child {
    border-bottom: none;
}

.menu-title {
    font-size: 11px;
    font-weight: 600;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0 20px;
    margin-bottom: 10px;
}

.menu {
    display: flex;
    flex-direction: column;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.menu-item ion-icon {
    font-size: 20px;
    color: #8b9298;
}

.menu-item:hover {
    background-color: var(--sidebar-hover-bg);
    color: var(--text-primary);
}

.menu-item.active {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
    border-right: 3px solid var(--sidebar-active-text);
}

.menu-item.active ion-icon {
    color: var(--sidebar-active-text);
}

/* Main Content Styles */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.topbar {
    height: 60px;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 20px;
    display: none; /* Hidden on desktop */
}

.mobile-menu-btn {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
}

.content-wrapper {
    padding: 30px;
    flex: 1;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

.card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 30px;
    border: 1px solid rgba(0,0,0,0.05);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 25px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}

.input-group {
    margin-bottom: 20px;
}

.input-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
}

.textarea-premium {
    width: 100%;
    min-height: 120px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: monospace;
    font-size: 14px;
    color: var(--text-primary);
    resize: vertical;
    transition: var(--transition);
    background-color: #fafafa;
}

.textarea-premium:focus {
    outline: none;
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
    background-color: #fff;
}

.textarea-premium::placeholder {
    color: #adb5bd;
}

.help-text {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 8px;
}

.actions {
    margin-bottom: 30px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 20px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn:disabled {
    opacity: 0.7;
    cursor: wait;
}

.btn-primary {
    background-color: #e7f3ff;
    color: #1877f2;
}

.btn-primary:hover {
    background-color: #dbeafe;
}

.btn-secondary {
    background-color: #f0f2f5;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: #e4e6eb;
}

/* Results Area */
.result-area {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    animation: fadeIn 0.5s ease;
}

.result-area.hidden {
    display: none;
}

.result-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    background-color: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: var(--radius-md);
}

.result-item.error-item {
    background-color: #fff5f5;
    border-color: #feb2b2;
}

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

.otp-code {
    font-size: 24px;
    font-weight: 700;
    color: #1877f2;
    letter-spacing: 2px;
    font-family: monospace;
}

.otp-error {
    color: var(--error-color);
    font-size: 14px;
}

.original-input {
    font-size: 12px;
    color: #6c757d;
    max-width: 300px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    padding: 5px;
    border-radius: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background-color: #e9ecef;
    color: var(--text-primary);
}

.btn-icon.success {
    color: var(--success-color);
}

.mt-3 {
    margin-top: 15px;
}

.api-card {
    margin-top: 28px;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.api-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
}

.api-card-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.api-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    background: #e7f3ff;
    color: #1877f2;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.api-block {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    margin-bottom: 12px;
}

.api-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 8px;
    letter-spacing: 0.08em;
}

.api-block code,
.api-pre {
    display: block;
    font-family: monospace;
    font-size: 13px;
    color: #0f172a;
    word-break: break-all;
}

.api-pre {
    margin-top: 10px;
    white-space: pre-wrap;
}

/* Progress bar for OTP timeout */
.progress-container {
    width: 40px;
    height: 40px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.circular-chart {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    max-height: 250px;
}

.circle-bg {
    fill: none;
    stroke: #eee;
    stroke-width: 3.8;
}

.circle {
    fill: none;
    stroke-width: 2.8;
    stroke-linecap: round;
    transition: stroke-dasharray 1s linear;
}

.percentage {
    fill: #666;
    font-family: sans-serif;
    font-size: 0.5em;
    text-anchor: middle;
}

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

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #333;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background-color: var(--success-color);
}

.toast.error {
    background-color: var(--error-color);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .topbar {
        display: flex;
    }

    .content-wrapper {
        padding: 15px;
    }
    
    .card {
        padding: 20px;
    }
    
    .original-input {
        display: none;
    }

    .api-card-header {
        flex-direction: column;
        align-items: flex-start;
    }
}