/* ========================================
   CRM Tool - Optimized Stylesheet
   ======================================== */

/* ---------- CSS VARIABLES ---------- */
:root {
    --color-primary: #5a67d8;
    --color-success: #48bb78;
    --color-danger: #f56565;
    --color-warning: #f6ad55;
    --color-gray: #a0aec0;
    --color-text: #333;
    --color-text-light: #555;
    --color-bg: #f5f6f8;
    --color-white: #fff;
    --color-border: #e2e8f0;
    --spacing-sm: 8px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --radius: 8px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 6px 18px rgba(0,0,0,0.12);
    --transition: 0.2s ease;
}

/* ---------- RESET & GENERAL ---------- */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: var(--spacing-lg);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
    color: #222;
    margin: 0 0 var(--spacing-md);
    font-weight: 600;
}

h1 {
    font-size: 1.875rem;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 1.25rem;
}

h3 {
    font-size: 1rem;
}

/* ---------- CONTAINER ---------- */
.container {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

@media (min-width: 769px) {
    .container {
        width: 90%;
    }
}

@media (max-width: 768px) {
    .container {
        width: 100%;
        padding: var(--spacing-md);
    }
    
    body {
        padding: var(--spacing-sm);
    }
}

/* ---------- CARDS ---------- */
.card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* ---------- GRID FOR SMALL CARDS ---------- */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 768px) {
    .cards-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

.small-card {
    padding: var(--spacing-md);
}

/* ---------- FORM ELEMENTS ---------- */
input, 
textarea, 
select {
    display: block;
    width: 100%;
    margin: var(--spacing-sm) 0 var(--spacing-md);
    padding: 12px 14px;
    border-radius: 6px;
    border: 1.5px solid var(--color-border);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color var(--transition), box-shadow var(--transition);
    background: var(--color-white);
}

input:focus, 
textarea:focus, 
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(90, 103, 216, 0.1);
}

input:disabled,
textarea:disabled,
select:disabled {
    background: #f7fafc;
    cursor: not-allowed;
    opacity: 0.6;
}

textarea {
    min-height: 80px;
    resize: vertical;
    font-family: inherit;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ---------- BUTTONS ---------- */
button {
    cursor: pointer;
    border: none;
    border-radius: 6px;
    padding: 10px 18px;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: inherit;
    transition: all var(--transition);
    color: var(--color-white);
    background-color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

button:hover:not(:disabled) {
    opacity: 0.9;
    box-shadow: 0 2px 8px rgba(90, 103, 216, 0.2);
}

button:active:not(:disabled) {
    transform: translateY(1px);
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* ---------- BUTTON VARIANTS ---------- */
.btn-edit,
.task-actions button:not(.complete):not(.delete) {
    background-color: var(--color-primary);
}

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

button.complete:hover:not(:disabled) {
    box-shadow: 0 2px 8px rgba(72, 187, 120, 0.2);
}

button.delete,
.btn-delete {
    background-color: var(--color-danger);
}

button.delete:hover:not(:disabled),
.btn-delete:hover:not(:disabled) {
    box-shadow: 0 2px 8px rgba(245, 101, 101, 0.2);
}

#cancelEdit {
    background-color: var(--color-gray);
    margin-left: var(--spacing-sm);
}

#cancelEdit:hover:not(:disabled) {
    box-shadow: 0 2px 8px rgba(160, 174, 192, 0.2);
}

/* ---------- ITEMS ---------- */
.contact-item, 
.task-item {
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    transition: background-color var(--transition);
}

.contact-item:hover,
.task-item:hover {
    background-color: rgba(90, 103, 216, 0.03);
}

.contact-item:last-child, 
.task-item:last-child {
    border-bottom: none;
}

.small {
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

/* ---------- ACTION BUTTONS ---------- */
.contact-actions button, 
.task-actions button {
    margin-right: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding: 7px 14px;
    font-size: 0.85rem;
}

.contact-actions,
.task-actions {
    margin-top: var(--spacing-sm);
}

/* ---------- FORM ACTIONS ---------- */
.form-actions {
    text-align: right;
    margin-top: var(--spacing-md);
}

@media (max-width: 480px) {
    .form-actions {
        text-align: center;
    }
    
    .form-actions button {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }
    
    #cancelEdit {
        margin-left: 0;
    }
}

/* ---------- ALERT MESSAGES ---------- */
.alert {
    padding: 12px 16px;
    margin-bottom: var(--spacing-md);
    border-radius: 6px;
    text-align: center;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

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

.alert.error {
    background-color: var(--color-danger);
    color: var(--color-white);
}

.alert.warning {
    background-color: var(--color-warning);
    color: var(--color-white);
}

/* ---------- EMPTY STATES ---------- */
.empty-state {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-light);
}

/* ---------- LOADING STATES ---------- */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ---------- UTILITIES ---------- */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

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

/* ---------- 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-width: 0;
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ---------- PRINT STYLES ---------- */
@media print {
    body {
        background: white;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
    
    button,
    .contact-actions,
    .task-actions {
        display: none;
    }
}

/* ---------- DARK MODE SUPPORT (Optional) ---------- */
@media (prefers-color-scheme: dark) {
    /* Uncomment to enable dark mode
    :root {
        --color-bg: #1a202c;
        --color-white: #2d3748;
        --color-text: #e2e8f0;
        --color-text-light: #cbd5e0;
        --color-border: #4a5568;
    }
    
    body {
        background: var(--color-bg);
    }
    
    input, textarea, select {
        background: #2d3748;
        color: var(--color-text);
        border-color: var(--color-border);
    }
    */
}