/* Shared CSS for FlipTheCoin.online */
/* Common styles used across all tool pages */

/* CSS Variables */
:root {
    --primary-color: #2196F3;
    --secondary-color: #42a5f5;
    --accent-color: #1976d2;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --text-primary: #333333;
    --text-secondary: #666666;
    --background-primary: #ffffff;
    --background-secondary: #f5f5f5;
    --border-color: #e0e0e0;
    --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-heavy: 0 8px 16px rgba(0,0,0,0.2);
    --border-radius: 8px;
    --border-radius-small: 4px;
    --transition: all 0.3s ease;
}

/* Common Button Styles */
.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-light);
}

.btn-secondary {
    background: var(--background-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 10px 22px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-icon {
    background: none;
    border: none;
    padding: 8px;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
}

.btn-icon:hover {
    background: var(--background-secondary);
    transform: scale(1.1);
}

/* Common Input Styles */
.input-field {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 16px;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
    background: var(--background-primary);
}

.input-field:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.input-field:invalid {
    border-color: var(--error-color);
}

/* Common Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--background-primary);
    border-radius: var(--border-radius);
    padding: 24px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-heavy);
    transform: scale(0.9);
    transition: var(--transition);
}

.modal.show .modal-content {
    transform: scale(1);
}

/* Common Card Styles */
.card {
    background: var(--background-primary);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

/* Common Typography */
.text-primary {
    color: var(--text-primary);
}

.text-secondary {
    color: var(--text-secondary);
}

.text-success {
    color: var(--success-color);
}

.text-warning {
    color: var(--warning-color);
}

.text-error {
    color: var(--error-color);
}

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

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* Common Spacing */
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.p-4 { padding: 32px; }

/* Common Layout */
.flex {
    display: flex;
}

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

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

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

.flex-wrap {
    flex-wrap: wrap;
}

.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.gap-4 { gap: 32px; }

/* Common Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.animate-fadeIn {
    animation: fadeIn 0.3s ease-out;
}

.animate-slideInUp {
    animation: slideInUp 0.3s ease-out;
}

.animate-slideInDown {
    animation: slideInDown 0.3s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* Common Utility Classes */
.hidden {
    display: none !important;
}

.visible {
    visibility: visible !important;
}

.invisible {
    visibility: hidden !important;
}

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: var(--border-radius); }
.rounded-sm { border-radius: var(--border-radius-small); }
.rounded-lg { border-radius: calc(var(--border-radius) * 2); }

.shadow-sm { box-shadow: var(--shadow-light); }
.shadow { box-shadow: var(--shadow-medium); }
.shadow-lg { box-shadow: var(--shadow-heavy); }

/* Common Responsive Design */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        padding: 16px;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .input-field {
        padding: 10px 14px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .modal-content {
        width: 98%;
        padding: 12px;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .input-field {
        padding: 8px 12px;
        font-size: 13px;
    }
}

/* Common Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Common Error States */
.error-message {
    color: var(--error-color);
    font-size: 14px;
    margin-top: 4px;
    display: block;
}

.success-message {
    color: var(--success-color);
    font-size: 14px;
    margin-top: 4px;
    display: block;
}

.warning-message {
    color: var(--warning-color);
    font-size: 14px;
    margin-top: 4px;
    display: block;
}

/* Common Focus States */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.3);
}

/* Common Hover Effects */
.hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.hover-opacity:hover {
    opacity: 0.8;
}