/* =============================================================================
   shared/style.css — edumod.ch Tool-Portal
   Basis: Backup 2026-03-21 + Erweiterungen für Tool-Seiten und Changelog-Modal
   ============================================================================= */

:root {
    /* Farben - edumod.ch Branding */
    --color-primary:        #1e3a5f;
    --color-primary-hover:  #152a45;
    --color-primary-light:  #e8eef4;
    --color-primary-subtle: #e8eef4;
    --color-accent:         #3b82f6;
    --color-accent-hover:   #2563eb;
    --color-bg:             #ffffff;
    --color-bg-subtle:      #f8fafc;
    --color-bg-muted:       #f1f5f9;
    --color-border:         #e2e8f0;
    --color-border-light:   #f1f5f9;
    --color-border-hover:   #cbd5e1;
    --color-text:           #1e293b;
    --color-text-muted:     #64748b;
    --color-text-light:     #94a3b8;
    --color-success:        #16a34a;
    --color-success-subtle: #f0fdf4;
    --color-warning:        #d97706;
    --color-warning-subtle: #fffbeb;
    --color-error:          #dc2626;
    --color-error-subtle:   #fef2f2;

    /* Status-Badges */
    --color-beta-bg:      #fef3c7;
    --color-beta-text:    #92400e;
    --color-planung-bg:   #f3f4f6;
    --color-planung-text: #6b7280;

    /* Typografie */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                 'Helvetica Neue', Arial, sans-serif;
    --font-mono: ui-monospace, 'Cascadia Code', 'Source Code Pro',
                 Menlo, Consolas, monospace;
    --font-size-xs:   0.75rem;
    --font-size-sm:   0.875rem;
    --font-size-base: 1rem;
    --font-size-lg:   1.125rem;
    --font-size-xl:   1.25rem;
    --font-size-2xl:  1.5rem;
    --font-size-3xl:  1.875rem;
    --line-height-base: 1.6;

    /* Abstände */
    --spacing-xs:  0.25rem;
    --spacing-sm:  0.5rem;
    --spacing-md:  1rem;
    --spacing-lg:  1.5rem;
    --spacing-xl:  2rem;
    --spacing-2xl: 3rem;

    /* Radien */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Schatten */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Layout */
    --max-width:     1200px;
    --header-height: 64px;
}

/* =============================================================================
   RESET & BASE
   ============================================================================= */

*, *::before, *::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

/* Verhindert dass display-Klassen das hidden-Attribut überschreiben */
[hidden] { display: none !important; }

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-bg-subtle);
    min-height: 100vh;
}

/* Tool-Seiten: body als Flex-Column damit Footer unten bleibt */
.tool-body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--color-bg-subtle);
}

/* =============================================================================
   HEADER (Dashboard + Tool-Seiten)
   ============================================================================= */

.header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Dashboard: Logo + "Tool-Portal" Text links */
.header-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.header-brand:hover {
    color: var(--color-primary);
}

.header-logo {
    height: 32px;
    display: flex;
    align-items: center;
}

.header-logo img {
    height: 100%;
    width: auto;
    object-fit: contain;
}

/* Tool-Seiten: Zurück-Link links */
.header-back {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    flex-shrink: 0;
}

.header-back:hover {
    color: var(--color-primary);
}

.header-back .header-logo {
    height: 26px;
    margin-right: var(--spacing-xs);
}

.header-back svg {
    flex-shrink: 0;
}

/* Tool-Seiten: Tool-Name mittig */
.header-tool-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
}

/* Rechte Seite: User + Buttons */
.header-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

.header-user {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* =============================================================================
   BUTTONS
   ============================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1.5;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease;
    background: transparent;
    color: var(--color-text);
}

.btn:hover {
    background: var(--color-bg-muted);
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: #ffffff;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
}

/* Version-Button in Tool-Cards (öffnet Changelog-Modal) */
.card-version {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 2px 6px;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
    margin-left: auto;
}

.card-version:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* =============================================================================
   LOGIN-SEITE
   ============================================================================= */

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-bg-subtle) 0%, var(--color-bg) 100%);
}

.login-box {
    width: 100%;
    max-width: 400px;
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-logo {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.login-logo img {
    height: 100%;
    width: auto;
    object-fit: contain;
}

.login-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.login-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.form-input::placeholder {
    color: var(--color-text-light);
}

.form-error {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-error-subtle);
    border: 1px solid #fecaca;
    border-radius: var(--radius-md);
    color: var(--color-error);
    font-size: var(--font-size-sm);
}

.form-timeout {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-subtle);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

/* =============================================================================
   DASHBOARD-LAYOUT
   ============================================================================= */

.dashboard {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.dashboard-header {
    margin-bottom: var(--spacing-xl);
}

.dashboard-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.dashboard-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
}

/* =============================================================================
   STATS-GRID
   ============================================================================= */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-content {
    flex-grow: 1;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.stat-meta {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

.stat-placeholder {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-style: italic;
}

/* =============================================================================
   KATEGORIE-FILTER
   ============================================================================= */

.category-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.category-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.15s ease;
}

.category-btn:hover {
    color: var(--color-text);
    border-color: var(--color-text-light);
}

.category-btn.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

/* =============================================================================
   TOOL-GRID & TOOL-CARDS
   ============================================================================= */

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.tool-card {
    display: flex;
    flex-direction: column;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
    cursor: pointer;
}

.tool-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.tool-card.planung {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.tool-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.tool-icon {
    width: 40px;
    height: 40px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}

.tool-icon svg {
    width: 20px;
    height: 20px;
}

.tool-title {
    flex-grow: 1;
    min-width: 0;
}

.tool-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.tool-badges {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.badge-beta {
    background: var(--color-beta-bg);
    color: var(--color-beta-text);
}

.badge-planung {
    background: var(--color-planung-bg);
    color: var(--color-planung-text);
}

.tool-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
    padding-left: calc(40px + var(--spacing-md));
}

.tool-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    padding-left: calc(40px + var(--spacing-md));
}

.tool-category {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--spacing-sm);
    background: var(--color-bg-subtle);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border-light);
}

/* =============================================================================
   EMPTY STATE
   ============================================================================= */

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
}

.empty-state-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-state-icon svg {
    width: 48px;
    height: 48px;
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.empty-state-text {
    font-size: var(--font-size-base);
    max-width: 400px;
    margin: 0 auto;
}

/* =============================================================================
   TOOL-SEITEN (z. B. h5p-converter)
   ============================================================================= */

/* Flex-Wrapper damit Footer immer unten bleibt */
.site-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Footer auf Tool-Seiten */
.site-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

/* =============================================================================
   CHANGELOG-MODAL
   ============================================================================= */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    z-index: 500;
    backdrop-filter: blur(2px);
}

body.modal-open {
    overflow: hidden;
}

.modal-dialog {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 480px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.modal-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: color 0.15s, background-color 0.15s;
    flex-shrink: 0;
}

.modal-close:hover {
    color: var(--color-text);
    background-color: var(--color-bg-subtle);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-loading,
.modal-error {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.modal-error {
    color: var(--color-error);
}

.changelog-version {
    margin-bottom: var(--spacing-lg);
}

.changelog-version:last-child {
    margin-bottom: 0;
}

.changelog-version h2 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
}

.changelog-version ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.changelog-version li {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    padding-left: var(--spacing-md);
    position: relative;
}

.changelog-version li::before {
    content: '·';
    position: absolute;
    left: 0.25rem;
    color: var(--color-text-muted);
}

/* =============================================================================
   FOOTER (Dashboard)
   ============================================================================= */

.footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-lg);
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-2xl);
}

/* =============================================================================
   UTILITIES
   ============================================================================= */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =============================================================================
   RESPONSIVE
   ============================================================================= */

@media (max-width: 768px) {
    .header-inner {
        padding: 0 var(--spacing-md);
    }

    .header-user {
        display: none;
    }

    .dashboard {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .tool-grid {
        grid-template-columns: 1fr;
    }

    .category-filter {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        padding-bottom: var(--spacing-md);
    }

    .login-box {
        padding: var(--spacing-xl);
    }

    .tool-description,
    .tool-meta {
        padding-left: 0;
    }

    .tool-header {
        flex-wrap: wrap;
    }
}