/* =====================================================================
   Calculator Bacalaureat – cb-style.css
   All classes prefixed with .cb-
   ===================================================================== */

/* -----------------------------------------------------------------------
   CSS Variables – Light Theme (default)
   --------------------------------------------------------------------- */
.cb-wrapper {
    --cb-primary:       #3b82f6;
    --cb-primary-dark:  #2563eb;
    --cb-bg:            #ffffff;
    --cb-bg-card:       #f8fafc;
    --cb-bg-input:      #ffffff;
    --cb-border:        #e2e8f0;
    --cb-border-focus:  #3b82f6;
    --cb-text:          #1e293b;
    --cb-text-muted:    #64748b;
    --cb-text-label:    #374151;
    --cb-pass-bg:       #dcfce7;
    --cb-pass-text:     #166534;
    --cb-pass-border:   #86efac;
    --cb-fail-bg:       #fee2e2;
    --cb-fail-text:     #991b1b;
    --cb-fail-border:   #fca5a5;
    --cb-warn-bg:       #fef9c3;
    --cb-warn-text:     #854d0e;
    --cb-warn-border:   #fde047;
    --cb-shadow:        0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --cb-shadow-md:     0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
    --cb-radius:        10px;
    --cb-radius-sm:     6px;
    --cb-font:          -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --cb-transition:    0.2s ease;

    font-family: var(--cb-font);
    color: var(--cb-text);
    line-height: 1.6;
    max-width: 860px;
    margin: 0 auto;
    padding: 1rem;
    box-sizing: border-box;
}

/* -----------------------------------------------------------------------
   Dark Theme
   --------------------------------------------------------------------- */
.cb-wrapper.cb-theme-dark {
    --cb-bg:           #0f172a;
    --cb-bg-card:      #1e293b;
    --cb-bg-input:     #0f172a;
    --cb-border:       #334155;
    --cb-border-focus: #60a5fa;
    --cb-text:         #f1f5f9;
    --cb-text-muted:   #94a3b8;
    --cb-text-label:   #cbd5e1;
    --cb-pass-bg:      #14532d;
    --cb-pass-text:    #86efac;
    --cb-pass-border:  #166534;
    --cb-fail-bg:      #450a0a;
    --cb-fail-text:    #fca5a5;
    --cb-fail-border:  #991b1b;
    --cb-warn-bg:      #422006;
    --cb-warn-text:    #fde047;
    --cb-warn-border:  #854d0e;
    background: var(--cb-bg);
    border-radius: var(--cb-radius);
    padding: 1.5rem;
}

/* -----------------------------------------------------------------------
   Intro
   --------------------------------------------------------------------- */
.cb-main-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cb-primary);
    margin: 0 0 0.75rem;
}

.cb-intro {
    background: var(--cb-bg-card);
    border: 1px solid var(--cb-border);
    border-left: 4px solid var(--cb-primary);
    border-radius: var(--cb-radius-sm);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    color: var(--cb-text-muted);
}
.cb-intro p { margin: 0; }

/* -----------------------------------------------------------------------
   Tabs
   --------------------------------------------------------------------- */
.cb-tabs {
    display: flex;
    gap: 0.5rem;
    border-bottom: 2px solid var(--cb-border);
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.cb-tab {
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    padding: 0.6rem 1.2rem;
    font-family: var(--cb-font);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--cb-text-muted);
    cursor: pointer;
    transition: color var(--cb-transition), border-color var(--cb-transition);
    border-radius: var(--cb-radius-sm) var(--cb-radius-sm) 0 0;
    white-space: nowrap;
}
.cb-tab:hover {
    color: var(--cb-primary);
}
.cb-tab.cb-tab-active {
    color: var(--cb-primary);
    border-bottom-color: var(--cb-primary);
    background: var(--cb-bg-card);
}

/* -----------------------------------------------------------------------
   Panels
   --------------------------------------------------------------------- */
.cb-panel-hidden { display: none; }
.cb-panel-solo   { display: block; }

/* -----------------------------------------------------------------------
   Card
   --------------------------------------------------------------------- */
.cb-card {
    background: var(--cb-bg-card);
    border: 1px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.75rem;
    box-shadow: var(--cb-shadow);
    margin-bottom: 1.5rem;
}

.cb-card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0 0 1.5rem;
    color: var(--cb-text);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* -----------------------------------------------------------------------
   Form Fields
   --------------------------------------------------------------------- */
.cb-field-group {
    margin-bottom: 1.1rem;
}

.cb-field-row {
    display: grid;
    gap: 1rem;
}
.cb-field-row-2 { grid-template-columns: 1fr 1fr; }

.cb-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--cb-text-label);
    margin-bottom: 0.4rem;
}

.cb-required {
    color: #ef4444;
    margin-left: 2px;
}

.cb-hint {
    display: block;
    font-size: 0.78rem;
    color: var(--cb-text-muted);
    margin-top: 0.25rem;
}

.cb-input {
    display: block;
    width: 100%;
    padding: 0.55rem 0.85rem;
    font-family: var(--cb-font);
    font-size: 0.95rem;
    color: var(--cb-text);
    background: var(--cb-bg-input);
    border: 1.5px solid var(--cb-border);
    border-radius: var(--cb-radius-sm);
    box-sizing: border-box;
    transition: border-color var(--cb-transition), box-shadow var(--cb-transition);
    -webkit-appearance: none;
}
.cb-input:focus {
    outline: none;
    border-color: var(--cb-border-focus);
    box-shadow: 0 0 0 3px rgba(59,130,246,.15);
}
.cb-input.cb-input-error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239,68,68,.15);
}
.cb-select {
    cursor: pointer;
    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='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
    -webkit-appearance: none;
}

/* Radio Group */
.cb-radio-group {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.3rem;
}
.cb-radio-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    cursor: pointer;
    color: var(--cb-text);
}
.cb-radio-label input { accent-color: var(--cb-primary); }

/* -----------------------------------------------------------------------
   Buttons
   --------------------------------------------------------------------- */
.cb-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.cb-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.4rem;
    font-family: var(--cb-font);
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    border-radius: var(--cb-radius-sm);
    cursor: pointer;
    transition: background var(--cb-transition), transform var(--cb-transition), box-shadow var(--cb-transition);
    white-space: nowrap;
    line-height: 1.4;
}
.cb-btn:active { transform: translateY(1px); }

.cb-btn-primary {
    background: var(--cb-primary);
    color: #fff;
    box-shadow: 0 1px 3px rgba(59,130,246,.4);
}
.cb-btn-primary:hover {
    background: var(--cb-primary-dark);
    box-shadow: var(--cb-shadow-md);
}

.cb-btn-secondary {
    background: var(--cb-bg);
    color: var(--cb-text-muted);
    border: 1.5px solid var(--cb-border);
}
.cb-btn-secondary:hover {
    color: var(--cb-text);
    border-color: var(--cb-primary);
}

.cb-btn-add {
    background: transparent;
    color: var(--cb-primary);
    border: 1.5px dashed var(--cb-primary);
    padding: 0.5rem 1.2rem;
    border-radius: var(--cb-radius-sm);
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--cb-transition);
    font-family: var(--cb-font);
}
.cb-btn-add:hover { background: rgba(59,130,246,.08); }

.cb-btn-copy {
    background: var(--cb-bg);
    color: var(--cb-text-muted);
    border: 1.5px solid var(--cb-border);
    padding: 0.45rem 1rem;
    border-radius: var(--cb-radius-sm);
    font-size: 0.85rem;
    margin-top: 0.75rem;
    cursor: pointer;
    transition: all var(--cb-transition);
    font-family: var(--cb-font);
    font-weight: 500;
}
.cb-btn-copy:hover {
    border-color: var(--cb-primary);
    color: var(--cb-primary);
}

.cb-btn-remove {
    background: transparent;
    border: 1.5px solid #fca5a5;
    color: #ef4444;
    border-radius: var(--cb-radius-sm);
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
    cursor: pointer;
    padding: 0;
    transition: background var(--cb-transition);
    font-family: var(--cb-font);
}
.cb-btn-remove:hover { background: #fee2e2; }

/* -----------------------------------------------------------------------
   Custom Subject Rows
   --------------------------------------------------------------------- */
.cb-subject-row { margin-bottom: 0.75rem; }
.cb-subject-fields {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: 0.5rem;
    align-items: start;
}

/* -----------------------------------------------------------------------
   Result Box
   --------------------------------------------------------------------- */
.cb-result-box {
    margin-top: 1.5rem;
    border-radius: var(--cb-radius);
    overflow: hidden;
    animation: cb-fadein 0.3s ease;
}

@keyframes cb-fadein {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.cb-result-inner {
    background: var(--cb-bg);
    border: 1.5px solid var(--cb-border);
    border-radius: var(--cb-radius);
    padding: 1.25rem 1.5rem;
}

.cb-result-error {
    border-color: #fca5a5;
    background: #fff1f1;
    color: #991b1b;
}
.cb-theme-dark .cb-result-error {
    background: #450a0a;
    color: #fca5a5;
}

.cb-result-main {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--cb-text);
    margin: 0.5rem 0 0.25rem;
}

.cb-result-line {
    font-size: 0.9rem;
    color: var(--cb-text-muted);
    margin: 0.2rem 0;
}

/* Badges */
.cb-badge {
    display: inline-block;
    padding: 0.25rem 0.9rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-width: 1px;
    border-style: solid;
}
.cb-badge-pass {
    background: var(--cb-pass-bg);
    color: var(--cb-pass-text);
    border-color: var(--cb-pass-border);
}
.cb-badge-fail {
    background: var(--cb-fail-bg);
    color: var(--cb-fail-text);
    border-color: var(--cb-fail-border);
}
.cb-badge-warn {
    background: var(--cb-warn-bg);
    color: var(--cb-warn-text);
    border-color: var(--cb-warn-border);
}

/* -----------------------------------------------------------------------
   Disclaimer
   --------------------------------------------------------------------- */
.cb-disclaimer {
    margin: 1.5rem 0 1rem;
    padding: 0.85rem 1.1rem;
    background: var(--cb-warn-bg);
    border: 1px solid var(--cb-warn-border);
    border-radius: var(--cb-radius-sm);
    font-size: 0.82rem;
    color: var(--cb-warn-text);
}
.cb-disclaimer p { margin: 0; }

/* -----------------------------------------------------------------------
   FAQ Accordion
   --------------------------------------------------------------------- */
.cb-faq {
    margin-top: 2rem;
}
.cb-faq-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 1rem;
    color: var(--cb-text);
}

.cb-faq-list { border-top: 1px solid var(--cb-border); }

.cb-faq-item { border-bottom: 1px solid var(--cb-border); }

.cb-faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    background: none;
    border: none;
    padding: 1rem 0;
    font-family: var(--cb-font);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--cb-text);
    text-align: left;
    cursor: pointer;
    transition: color var(--cb-transition);
    gap: 0.75rem;
}
.cb-faq-question:hover { color: var(--cb-primary); }

.cb-faq-icon {
    flex-shrink: 0;
    font-size: 1.3rem;
    font-weight: 300;
    color: var(--cb-primary);
    line-height: 1;
}

.cb-faq-answer {
    padding: 0 0 1rem;
    font-size: 0.9rem;
    color: var(--cb-text-muted);
}
.cb-faq-answer p { margin: 0; }

/* -----------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------- */
@media (max-width: 640px) {
    .cb-wrapper { padding: 0.75rem; }
    .cb-card { padding: 1.25rem 1rem; }
    .cb-field-row-2 { grid-template-columns: 1fr; }
    .cb-subject-fields { grid-template-columns: 1fr 1fr; gap: 0.4rem; }
    .cb-subject-fields .cb-subject-name { grid-column: 1 / -1; }
    .cb-btn-remove { grid-column: 2; justify-self: end; }
    .cb-tab { padding: 0.5rem 0.8rem; font-size: 0.85rem; }
    .cb-result-main { font-size: 1.05rem; }
    .cb-actions { flex-direction: column; }
    .cb-btn { width: 100%; justify-content: center; }
}

@media (max-width: 400px) {
    .cb-subject-fields { grid-template-columns: 1fr; }
    .cb-subject-fields .cb-subject-name { grid-column: 1; }
    .cb-btn-remove { grid-column: 1; width: 100%; }
}