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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #1E293B;
    background-color: #F8FAFC;
}

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 50;
    transition: all 0.3s ease;
}

header.scrolled {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

/* Tool Card Styles */
.tool-card {
    transition: all 0.3s ease;
    border-radius: 12px;
    overflow: hidden;
    background-color: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background-color: #3B82F6;
    color: white;
}

.btn-primary:hover {
    background-color: #2563EB;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: white;
    color: #1E293B;
    border: 1px solid #E2E8F0;
}

.btn-secondary:hover {
    background-color: #F8FAFC;
    transform: translateY(-2px);
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #1E293B;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    border: 1px solid #E2E8F0;
    border-radius: 8px;
    background-color: white;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #3B82F6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Tool Page Styles */
.tool-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.tool-container {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tool-header {
    padding: 40px 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
    text-align: center;
}

.tool-body {
    padding: 60px 0;
    flex: 1;
}

.tool-card {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.tool-card-header {
    padding: 24px;
    border-bottom: 1px solid #E2E8F0;
}

.tool-card-body {
    padding: 24px;
}

.tool-card-footer {
    padding: 24px;
    border-top: 1px solid #E2E8F0;
    background-color: #F8FAFC;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .tool-body {
        padding: 40px 0;
    }
    
    .tool-header {
        padding: 30px 0;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
}

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

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #F1F5F9;
}

::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus Styles */
button:focus,
input:focus,
select:focus,
textarea:focus,
[tabindex]:focus {
    outline: 2px solid #3B82F6;
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    header,
    footer,
    .no-print {
        display: none;
    }
    
    .tool-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* Loading State */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3B82F6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Alert Messages */
.alert {
    padding: 16px 24px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid transparent;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
    color: #065F46;
}

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #991B1B;
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
    color: #1E40AF;
}

/* Tool Result Styles */
.result-container {
    margin-top: 30px;
    padding: 20px;
    background-color: #F8FAFC;
    border-radius: 8px;
    border: 1px solid #E2E8F0;
}

.result-header {
    margin-bottom: 15px;
    font-weight: 600;
    color: #1E293B;
}

.result-content {
    word-break: break-word;
}

/* Tool Option Styles */
.tool-options {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.option-btn {
    padding: 8px 16px;
    border: 1px solid #E2E8F0;
    background-color: white;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
}

.option-btn:hover {
    background-color: #F8FAFC;
}

.option-btn.active {
    background-color: #3B82F6;
    color: white;
    border-color: #3B82F6;
}