/* ------------------------------------------------------------------
 * THEME: modern and simple - black text, white background, Greek blue
 * as the only accent color. Bootstrap's colored classes (success,
 * warning, info, ...) are mapped onto this palette below, so the
 * templates can keep using the usual Bootstrap classes.
 * Red is only used for "Nicht gewusst" (bright red), deleting (dark wine red) and errors.
 * ------------------------------------------------------------------ */

:root {
    --greek-blue: #0D5EAF;        /* blue of the Greek flag */
    --greek-blue-dark: #0A4A8B;   /* hover / active */
    --greek-blue-light: #E8F0F9;  /* light backgrounds */
    --greek-blue-mid: #9DBFE3;    /* "in progress" in progress bars */
    --line: #E3E3E3;              /* thin borders */
    --red-unknown: #D93636;       /* "Nicht gewusst": bright, friendly red */
    --red-unknown-dark: #B82B2B;
    --red-delete: #9B1C1C;        /* deleting: dark wine red */
    --red-delete-dark: #7A1515;

    --bs-body-color: #000;
    --bs-body-color-rgb: 0, 0, 0;
    --bs-body-bg: #fff;
    --bs-secondary-color: #5F6368;
    --bs-primary: var(--greek-blue);
    --bs-primary-rgb: 13, 94, 175;
    --bs-link-color: var(--greek-blue);
    --bs-link-color-rgb: 13, 94, 175;
    --bs-link-hover-color: var(--greek-blue-dark);
    --bs-link-hover-color-rgb: 10, 74, 139;
    --bs-border-color: var(--line);
    --bs-font-sans-serif: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #fff;
    color: #000;
}

h1, h2, h3, h4, h5, .h1, .h2, .h3, .h4, .h5 {
    font-weight: 600;
    letter-spacing: -.01em;
}

/* Navigation: white with a thin blue line, like a stripe of the flag */
.navbar, .navbar.bg-body-tertiary {
    background-color: #fff !important;
    border-bottom: 3px solid var(--greek-blue) !important;
}

.navbar-brand {
    color: var(--greek-blue) !important;
    font-weight: 600;
}

.navbar .nav-link {
    color: #000;
}

.navbar .nav-link.active {
    color: var(--greek-blue) !important;
    font-weight: 600;
}

/* Cards and dialogs: no shadows, thin border */
.card, .modal-content {
    border: 1px solid var(--line);
    box-shadow: none !important;
}

.card-header {
    /* transparent, so that the rounded corners of the card stay visible */
    background-color: transparent;
    border-bottom-color: var(--line);
}

/* --- Buttons --- */

/* Main actions (e.g. "Gewusst", "Speichern"): solid Greek blue */
.btn-primary, .btn-success {
    --bs-btn-color: #fff;
    --bs-btn-bg: var(--greek-blue);
    --bs-btn-border-color: var(--greek-blue);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--greek-blue-dark);
    --bs-btn-hover-border-color: var(--greek-blue-dark);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--greek-blue-dark);
    --bs-btn-active-border-color: var(--greek-blue-dark);
    --bs-btn-disabled-bg: var(--greek-blue);
    --bs-btn-disabled-border-color: var(--greek-blue);
    --bs-btn-focus-shadow-rgb: 13, 94, 175;
}

/* Secondary blue actions: outline */
.btn-outline-primary, .btn-outline-success, .btn-outline-warning {
    --bs-btn-color: var(--greek-blue);
    --bs-btn-bg: #fff;
    --bs-btn-border-color: var(--greek-blue);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--greek-blue);
    --bs-btn-hover-border-color: var(--greek-blue);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--greek-blue-dark);
    --bs-btn-active-border-color: var(--greek-blue-dark);
    --bs-btn-focus-shadow-rgb: 13, 94, 175;
}

/* "Nicht gewusst": bright red (an answer, not something dangerous) */
.btn-unknown {
    --bs-btn-color: #fff;
    --bs-btn-bg: var(--red-unknown);
    --bs-btn-border-color: var(--red-unknown);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--red-unknown-dark);
    --bs-btn-hover-border-color: var(--red-unknown-dark);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--red-unknown-dark);
    --bs-btn-active-border-color: var(--red-unknown-dark);
    --bs-btn-focus-shadow-rgb: 217, 54, 54;
}

/* Confirming a deletion ("Ja, löschen"): dark wine red */
.btn-danger {
    --bs-btn-color: #fff;
    --bs-btn-bg: var(--red-delete);
    --bs-btn-border-color: var(--red-delete);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--red-delete-dark);
    --bs-btn-hover-border-color: var(--red-delete-dark);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--red-delete-dark);
    --bs-btn-active-border-color: var(--red-delete-dark);
    --bs-btn-focus-shadow-rgb: 155, 28, 28;
}

/* "Lektion löschen": dark wine red outline */
.btn-outline-danger {
    --bs-btn-color: var(--red-delete);
    --bs-btn-bg: #fff;
    --bs-btn-border-color: var(--red-delete);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--red-delete);
    --bs-btn-hover-border-color: var(--red-delete);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--red-delete-dark);
    --bs-btn-active-border-color: var(--red-delete-dark);
    --bs-btn-focus-shadow-rgb: 155, 28, 28;
}

/* Neutral confirmation (e.g. "Ja, zurücksetzen"): solid black */
.btn-dark {
    --bs-btn-color: #fff;
    --bs-btn-bg: #000;
    --bs-btn-border-color: #000;
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: #333;
    --bs-btn-hover-border-color: #333;
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: #333;
    --bs-btn-active-border-color: #333;
    --bs-btn-focus-shadow-rgb: 0, 0, 0;
}

/* Neutral actions (e.g. "Abbrechen", "Abmelden", "Lösung anzeigen", "Zurücksetzen"): black outline */
.btn-secondary, .btn-warning, .btn-outline-secondary, .btn-outline-dark {
    --bs-btn-color: #000;
    --bs-btn-bg: #fff;
    --bs-btn-border-color: #000;
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: #000;
    --bs-btn-hover-border-color: #000;
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: #333;
    --bs-btn-active-border-color: #333;
    --bs-btn-focus-shadow-rgb: 0, 0, 0;
}

.btn-link {
    --bs-btn-color: var(--greek-blue);
    --bs-btn-hover-color: var(--greek-blue-dark);
}

/* "Löschen" links in the lesson table */
.link-danger, .btn-link.link-danger {
    color: var(--red-delete) !important;
}

/* --- Badges: blue, or white with a black outline --- */
.badge.text-bg-primary, .badge.text-bg-info, .badge.text-bg-success {
    color: #fff !important;
    background-color: var(--greek-blue) !important;
}

.badge.text-bg-warning, .badge.text-bg-secondary, .badge.text-bg-danger, .badge.text-bg-light {
    color: #000 !important;
    background-color: #fff !important;
    border: 1px solid #000;
}

.badge {
    font-weight: 600;
}

/* --- Progress bars: known = blue, in progress = light blue --- */
.progress, .progress-stacked {
    background-color: #F1F1F1;
}

.progress-bar.bg-success {
    background-color: var(--greek-blue) !important;
}

.progress-bar.bg-warning {
    background-color: var(--greek-blue-mid) !important;
}

/* --- Messages --- */
.alert-info, .alert-success {
    --bs-alert-color: #000;
    --bs-alert-bg: var(--greek-blue-light);
    --bs-alert-border-color: var(--greek-blue-mid);
    --bs-alert-link-color: var(--greek-blue);
}

/* Errors stay red, so that they are noticed */
.alert-danger {
    --bs-alert-color: #8A1414;
    --bs-alert-bg: #FDF1F1;
    --bs-alert-border-color: #E8B4B4;
}

.form-control:focus, .form-select:focus, .form-check-input:focus {
    border-color: var(--greek-blue);
    box-shadow: 0 0 0 .2rem rgba(13, 94, 175, .2);
}

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

.bg-body-tertiary {
    background-color: #F7F7F7 !important;
}

/* ------------------------------------------------------------------
 * LAYOUT
 * ------------------------------------------------------------------ */

#content {
    flex: 1;
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

/* Cards and forms use the full width on phones and stay narrow on larger screens. */
.card-narrow {
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.alert {
    max-width: 560px;
    margin: 0 auto 1rem auto;
    border-radius: .75rem;
}

.alert ul {
    margin-bottom: 0;
}

.progress-info {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    justify-content: center;
}

.vocab-word {
    font-size: clamp(1.75rem, 7vw, 2.5rem);
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: 0;
    overflow-wrap: anywhere;
}

.vocab-solution {
    color: var(--greek-blue);
}

/* Buttons below each other on phones (easy to hit with the thumb), side by side from 576px on. */
.answer-buttons {
    display: grid;
    gap: .75rem;
}

@media (min-width: 576px) {
    .answer-buttons {
        grid-template-columns: repeat(3, 1fr);
    }
}

.answer-buttons .btn {
    padding-top: .9rem;
    padding-bottom: .9rem;
}

/* Tables (lesson overview) may be wider than the learning card. */
.card-wide {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
}

.sql-output {
    font-size: .85rem;
    word-break: break-all;
}