/* ============================================================
   ELCOS Design System
   Import BEFORE Bootstrap so variables are available globally
   ============================================================ */

:root {
    /* Brand */
    --color-primary:        #0d6efd;
    --color-primary-hover:  #0a58ca;
    --color-primary-text:   #ffffff;

    --color-secondary:      #6c757d;
    --color-secondary-hover:#545b62;
    --color-secondary-text: #ffffff;

    --color-danger:         #dc3545;
    --color-danger-hover:   #b02a37;
    --color-danger-text:    #ffffff;

    --color-success:        #198754;
    --color-warning:        #ffc107;
    --color-info:           #0dcaf0;

    /* Surface / Background */
    --surface-0:  #ffffff;
    --surface-1:  #f8f9fa;
    --surface-2:  #e9ecef;
    --surface-3:  #dee2e6;

    /* Text */
    --text-primary:   #212529;
    --text-secondary: #6c757d;
    --text-muted:     #adb5bd;

    /* Border */
    --border-color:  #dee2e6;
    --border-radius: 0.375rem;

    /* Typography */
    --font-family-base: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-size-sm:  0.875rem;
    --font-size-base: 1rem;
    --font-size-lg:  1.125rem;
    --font-size-xl:  1.25rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;

    /* Navbar */
    --navbar-height: 56px;
    --navbar-bg:     #ffffff;
    --navbar-border: #dee2e6;

    /* Shadow */
    --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,.10);
    --shadow-lg: 0 8px 24px rgba(0,0,0,.12);

    /* Calculator result card */
    --calc-result-bg:   #0d6efd;
    --calc-result-text: #ffffff;
    --calc-result-font: 1.75rem;
}

/* ============================================================
   Global base
   ============================================================ */

body {
    font-family: var(--font-family-base);
    background-color: var(--surface-1);
    color: var(--text-primary);
}

/* ============================================================
   Button system
   Override Bootstrap's .btn-* so they use design-system tokens
   ============================================================ */

.btn-primary {
    --bs-btn-bg:           var(--color-primary);
    --bs-btn-border-color: var(--color-primary);
    --bs-btn-hover-bg:     var(--color-primary-hover);
    --bs-btn-hover-border-color: var(--color-primary-hover);
    --bs-btn-active-bg:    var(--color-primary-hover);
    --bs-btn-color:        var(--color-primary-text);
}

.btn-secondary {
    --bs-btn-bg:           var(--color-secondary);
    --bs-btn-border-color: var(--color-secondary);
    --bs-btn-hover-bg:     var(--color-secondary-hover);
    --bs-btn-hover-border-color: var(--color-secondary-hover);
    --bs-btn-active-bg:    var(--color-secondary-hover);
    --bs-btn-color:        var(--color-secondary-text);
}

.btn-danger {
    --bs-btn-bg:           var(--color-danger);
    --bs-btn-border-color: var(--color-danger);
    --bs-btn-hover-bg:     var(--color-danger-hover);
    --bs-btn-hover-border-color: var(--color-danger-hover);
    --bs-btn-active-bg:    var(--color-danger-hover);
    --bs-btn-color:        var(--color-danger-text);
}

/* Convenience aliases from Bootstrap classes we're migrating away from */
.btn-success  { @extend .btn-primary; }

/* ============================================================
   Navbar
   ============================================================ */

.navbar-elcos {
    background-color: var(--navbar-bg);
    border-bottom: 1px solid var(--navbar-border);
    min-height: var(--navbar-height);
    box-shadow: var(--shadow-sm);
}

.navbar-elcos .navbar-brand {
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--color-primary);
}

/* ============================================================
   Cards / surfaces
   ============================================================ */

.surface-card {
    background-color: var(--surface-0);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    padding: var(--space-6);
}

.surface-2 {
    background-color: var(--surface-2);
    border-radius: var(--border-radius);
    padding: var(--space-4);
}

/* ============================================================
   Calculator result card (Task 5)
   ============================================================ */

.calc-result-card {
    background-color: var(--calc-result-bg);
    color: var(--calc-result-text);
    border-radius: var(--border-radius);
    padding: var(--space-6);
    font-size: var(--calc-result-font);
    font-weight: 700;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.calc-result-card .calc-result-label {
    font-size: var(--font-size-base);
    font-weight: 400;
    opacity: 0.85;
    margin-bottom: var(--space-2);
}

.calc-intermediate {
    background-color: var(--surface-2);
    border-radius: var(--border-radius);
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ============================================================
   Labels / Tags (cart item labels, Notion-style)
   ============================================================ */

.label-chip {
    display: inline-flex;
    align-items: center;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 600;
    border: 1px solid;
    cursor: pointer;
    white-space: nowrap;
    line-height: 1.6;
    transition: opacity 0.15s, transform 0.1s;
    user-select: none;
}
.label-chip:hover { opacity: 0.75; transform: scale(0.97); }

.btn-label-tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: 1.5px dashed #adb5bd;
    border-radius: 50%;
    background: transparent;
    color: #adb5bd;
    font-size: 0.65rem;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.btn-label-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    border-style: solid;
    background: rgba(13,110,253,.07);
}

.label-picker-dropdown {
    position: fixed;
    z-index: 9999;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,.14);
    width: 230px;
    padding: 8px;
}

.label-picker-header {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0 4px 6px;
}

.label-picker-section-title {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 6px;
}

.label-picker-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 6px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.82rem;
    transition: background 0.1s;
}
.label-picker-item:hover { background: var(--surface-1); }
.label-picker-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.label-color-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.btn-label-del {
    background: none;
    border: none;
    color: #adb5bd;
    font-size: 1rem;
    line-height: 1;
    padding: 0 2px;
    cursor: pointer;
    transition: color 0.1s;
}
.btn-label-del:hover { color: var(--color-danger); }
.btn-label-del--trash { opacity: 0; transition: opacity 0.15s, color 0.1s; }
.label-picker-item:hover .btn-label-del--trash { opacity: 1; }

.label-picker-divider {
    border-top: 1px solid var(--border-color);
    margin: 6px 0;
}

.label-picker-new { }

.label-color-palette {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 4px;
}

.label-color-btn {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2.5px solid transparent;
    cursor: pointer;
    padding: 0;
    transition: transform 0.12s, border-color 0.12s;
}
.label-color-btn:hover { transform: scale(1.2); }
.label-color-btn--active {
    border-color: #1a1a1a;
    transform: scale(1.15);
    box-shadow: 0 0 0 2px #fff, 0 0 0 4px currentColor;
}

/* ============================================================
   Checkboxes — ensure visibility on white backgrounds
   ============================================================ */

.form-check-input {
    border: 1.5px solid #6c757d;
    background-color: #fff;
}

.form-check-input:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.form-check-input:indeterminate {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}