/* ============================================================
   LanguageByExample — feuille de style principale
   Couleurs centralisées en haut pour modification facile
   ============================================================ */

:root {
    --color-primary: #2c5f8a; /* bleu principal (nav, boutons primaires) */
    --color-primary-dark: #1e4268; /* bleu foncé (hover) */
    --color-primary-light: #d6e8f5; /* bleu très clair (fond filtre, entête table) */

    --color-success: #2e7d32;
    --color-success-light: #e8f5e9;
    --color-danger: #c62828;
    --color-danger-light: #fdecea;
    --color-warning: #e65100;
    --color-warning-light: #fff3e0;
    --color-info: #0277bd;
    --color-info-light: #e1f5fe;

    --color-text: #1a1a1a;
    --color-text-muted: #555555;
    --color-border: #c8d8e8;
    --color-bg: #f4f7fb;
    --color-white: #ffffff;

    --color-card-front: #e8f0fe; /* fond recto de la fiche révision */
    --color-card-back: #fff8e1; /* fond verso de la fiche révision */
    --color-card-note: #f3e5f5; /* fond de la note */

    --font-main: "Segoe UI", Arial, sans-serif;
    --radius: 6px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* ---- Reset & base ----------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-main);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 15px;
    line-height: 1.5;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* ---- Navigation ------------------------------------------- */
nav.main-nav {
    background: var(--color-primary);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    height: 52px;
    box-shadow: var(--shadow);
}

nav.main-nav .nav-brand {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.5px;
    margin-right: auto;
}

nav.main-nav a {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.95rem;
    padding: 0.3rem 0.7rem;
    border-radius: var(--radius);
    transition: background 0.15s;
}
nav.main-nav a:hover,
nav.main-nav a.active {
    background: rgba(255, 255, 255, 0.18);
    color: var(--color-white);
    text-decoration: none;
}

/* ---- Conteneur principal ---------------------------------- */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

/* ---- Titres de page --------------------------------------- */
h1.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--color-primary-light);
    padding-bottom: 0.5rem;
}

/* ---- Alertes / flash -------------------------------------- */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.93rem;
}
.alert-success {
    background: var(--color-success-light);
    color: var(--color-success);
    border-left: 4px solid var(--color-success);
}
.alert-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
    border-left: 4px solid var(--color-danger);
}
.alert-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
    border-left: 4px solid var(--color-warning);
}
.alert-info {
    background: var(--color-info-light);
    color: var(--color-info);
    border-left: 4px solid var(--color-info);
}

/* ---- Boutons ---------------------------------------------- */
.btn {
    display: inline-block;
    padding: 0.45rem 1.1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition:
        background 0.15s,
        opacity 0.15s;
    line-height: 1.4;
}
.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

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

.btn-success {
    background: var(--color-success);
    color: var(--color-white);
}
.btn-success:hover {
    background: #1b5e20;
}

.btn-danger {
    background: var(--color-danger);
    color: var(--color-white);
}
.btn-danger:hover {
    background: #8e0000;
}

.btn-secondary {
    background: #e0e0e0;
    color: var(--color-text);
}
.btn-secondary:hover {
    background: #bdbdbd;
}

.btn-sm {
    padding: 0.25rem 0.7rem;
    font-size: 0.82rem;
}
.btn-lg {
    padding: 0.65rem 1.6rem;
    font-size: 1.05rem;
}

/* ---- Formulaires ------------------------------------------ */
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}
.form-control {
    width: 100%;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.93rem;
    font-family: var(--font-main);
    background: var(--color-white);
    color: var(--color-text);
    transition: border-color 0.15s;
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(44, 95, 138, 0.15);
}
.form-control.error {
    border-color: var(--color-danger);
}
.form-error {
    color: var(--color-danger);
    font-size: 0.82rem;
    margin-top: 0.2rem;
}

/* ---- Panneau filtre --------------------------------------- */
.filter-panel {
    background: var(--color-primary-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.2rem;
    margin-bottom: 1.2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    align-items: flex-end;
}
.filter-panel .form-group {
    margin-bottom: 0;
    min-width: 160px;
    flex: 1;
}

/* ---- Tableau ---------------------------------------------- */
.table-wrapper {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow-x: auto;
}

table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}
table.data-table thead th {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-weight: 700;
    padding: 0.7rem 0.8rem;
    text-align: left;
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}
table.data-table tbody tr:nth-child(even) {
    background: #f8fafd;
}
table.data-table tbody tr:hover {
    background: #eef4fb;
}
table.data-table td {
    padding: 0.6rem 0.8rem;
    border-bottom: 1px solid #e8eef5;
    vertical-align: top;
}
table.data-table .td-truncate {
    max-width: 220px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
table.data-table .td-actions {
    white-space: nowrap;
    text-align: right;
}
table.data-table td .badge-lang {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.15rem 0.5rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
}

/* ---- Formulaire carte (modal-like inline) ----------------- */
.card-form {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}
.card-form h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--color-primary-light);
    padding-bottom: 0.4rem;
}
.form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.form-row .form-group {
    flex: 1;
    min-width: 180px;
}
.form-actions {
    display: flex;
    gap: 0.6rem;
    margin-top: 1rem;
    justify-content: flex-end;
}

/* ---- Confirmation suppression ----------------------------- */
.confirm-banner {
    background: var(--color-danger-light);
    border: 1px solid var(--color-danger);
    border-radius: var(--radius);
    padding: 0.85rem 1.2rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.confirm-banner span {
    flex: 1;
    font-weight: 600;
    color: var(--color-danger);
}

/* ---- Pagination ------------------------------------------- */
.pagination-wrapper {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
}
.pagination-wrapper nav {
    display: flex;
    gap: 0.3rem;
    align-items: center;
}
.pagination-wrapper span,
.pagination-wrapper a {
    padding: 0.3rem 0.7rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    border: 1px solid var(--color-border);
    background: var(--color-white);
    color: var(--color-primary);
}
.pagination-wrapper span[aria-current="page"] {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    font-weight: 700;
}

/* ---- Import ---------------------------------------------- */
.import-panel {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    max-width: 600px;
}
.import-summary {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin: 1rem 0;
}
.import-stat {
    flex: 1;
    min-width: 120px;
    padding: 1rem;
    border-radius: var(--radius);
    text-align: center;
    font-weight: 700;
}
.import-stat .stat-num {
    font-size: 2rem;
    display: block;
}
.import-stat .stat-label {
    font-size: 0.82rem;
    display: block;
    color: var(--color-text-muted);
}
.import-stat.read {
    background: var(--color-info-light);
    border: 1px solid var(--color-info);
}
.import-stat.added {
    background: var(--color-success-light);
    border: 1px solid var(--color-success);
}
.import-stat.rejected {
    background: var(--color-danger-light);
    border: 1px solid var(--color-danger);
}

.import-errors {
    margin-top: 1rem;
}
.import-errors details summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--color-danger);
    padding: 0.4rem 0;
}
.import-errors ul {
    list-style: none;
    margin-top: 0.5rem;
    background: var(--color-danger-light);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
}
.import-errors ul li {
    font-size: 0.83rem;
    padding: 0.15rem 0;
    color: var(--color-danger);
    border-bottom: 1px solid rgba(198, 40, 40, 0.1);
}
.import-errors ul li:last-child {
    border-bottom: none;
}

/* ---- Révision (flashcard) --------------------------------- */
.review-setup {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    max-width: 650px;
}
.review-setup h2 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.review-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}
.review-progress .progress-info {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}
.progress-bar-outer {
    flex: 1;
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    margin: 0 1rem;
    overflow: hidden;
}
.progress-bar-inner {
    height: 100%;
    background: var(--color-primary);
    border-radius: 3px;
    transition: width 0.3s;
}

.flashcard {
    perspective: 1000px;
    margin: 1rem auto;
    max-width: 700px;
}
.flashcard-inner {
    background: var(--color-card-front);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 2.5rem 2rem;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    transition: background 0.3s;
    border: 2px solid var(--color-border);
    position: relative;
}
.flashcard-inner.flipped {
    background: var(--color-card-back);
    border-color: var(--color-primary-light);
}
.flashcard-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
    margin-bottom: 0.8rem;
    position: absolute;
    top: 1rem;
    left: 1.2rem;
}
.flashcard-text {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
}
.flashcard-hint {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: 1.2rem;
    font-style: italic;
}
.flashcard-meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
    position: absolute;
    bottom: 0.8rem;
    right: 1.2rem;
}

.card-note-box {
    background: var(--color-card-note);
    border-radius: var(--radius);
    padding: 0.8rem 1.1rem;
    margin: 0.8rem auto;
    max-width: 700px;
    font-size: 0.92rem;
    color: var(--color-text);
    border-left: 4px solid #9c27b0;
}

.review-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}
.review-nav-btn {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.review-nav-btn:hover:not(:disabled) {
    background: var(--color-primary);
    color: var(--color-white);
}
.review-nav-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.review-end-banner {
    background: var(--color-success-light);
    border: 1px solid var(--color-success);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    margin: 1rem auto;
    max-width: 500px;
}
.review-end-banner h2 {
    color: var(--color-success);
    margin-bottom: 0.5rem;
}

/* ---- Responsive ------------------------------------------- */
@media (max-width: 680px) {
    nav.main-nav {
        padding: 0 1rem;
        gap: 0.7rem;
    }
    .container {
        padding: 0 0.75rem;
        margin: 1rem auto;
    }
    .filter-panel {
        flex-direction: column;
    }
    .form-row {
        flex-direction: column;
    }
    table.data-table {
        font-size: 0.78rem;
    }
    .flashcard-text {
        font-size: 1.1rem;
    }
}