:root {
    --bg-dark: #eaeaef;
    --bg-card: #ffffff;
    --border-color: #c7c7cc;          /* Solide, immer sichtbar – war rgba(0,0,0,0.14) */
    --text-primary: #1a1a1e;
    --text-off-white: #1a1a1e;
    --text-secondary: #3d3d43;   /* War #6e6e73 – jetzt 8.6:1 Kontrast */
    --text-muted: #6e6e73;       /* Nur für absolut unkritische Texte */
    --accent-blue: #4f46e5;      /* Etwas dunkler für besseren Kontrast auf Weiß */
    --accent-blue-hover: #3730a3;
    --accent-green: #059669;
    --accent-green-hover: #047857;
    --accent-red: #dc2626;
    --accent-info: #0284c7;
    --glass-blur: blur(16px);
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: #c7c7cc;
    --transition-smooth: all 0.3s ease;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    letter-spacing: -0.015em;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Glassmorphism Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.85) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: -0.03em;
    font-size: 1.4rem;
    color: var(--text-primary) !important;
    margin-right: 3rem;
}

.nav-links-group {
    display: flex !important;
    flex-direction: row !important;
    gap: 2rem !important;
    align-items: center !important;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary) !important;
    transition: var(--transition-smooth);
    padding: 0.5rem 0;
    position: relative;
    text-decoration: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-blue);
    transition: var(--transition-smooth);
}

.nav-link:hover {
    color: var(--text-primary) !important;
}

.nav-link.active {
    color: var(--text-primary) !important;
}

.nav-link.active::after {
    width: 100%;
}

.nav-link.locked {
    opacity: 0.45;
    cursor: default;
    pointer-events: none;
    filter: grayscale(1);
}

.nav-link.locked::before {
    content: '🔒';
    font-size: 0.7rem;
    margin-right: 5px;
    vertical-align: middle;
}

/* Premium Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s ease;
    overflow: hidden;
    height: 100%;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.14);
    border-color: rgba(0, 0, 0, 0.22);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 1.5rem;
}

/* Typography tweaks */
h1, h2, h3, h4, h5, .h1, .h2, .h3, .h4, .h5 {
    font-weight: 600;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    color: var(--text-primary) !important;
}

::selection {
    background: var(--accent-blue);
    color: #ffffff;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(160deg, #1a1a1e 0%, #3d3d43 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.text-secondary, .text-muted {
    color: var(--text-secondary) !important;
}

/* Buttons */
.btn {
    border-radius: 99px;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.6rem 1.5rem;
    transition: var(--transition-smooth);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--accent-blue) !important;
    color: white !important;
}

.btn-primary:hover {
    background-color: var(--accent-blue-hover) !important;
    transform: scale(1.02);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-success {
    background-color: var(--accent-green);
    color: white !important;
}

/* =============================================
   OUTLINE BUTTONS – solide, opake Borders
   ============================================= */

.btn-outline-light {
    border: 2px solid #a3a3a3;
    background: transparent;
    color: var(--text-primary) !important;
}
.btn-outline-light:hover {
    border-color: #525252;
    background: transparent;
}

.btn-outline-danger {
    color: var(--accent-red) !important;
    border: 2px solid var(--accent-red);
    background: transparent;
}
.btn-outline-danger:hover {
    border-color: #b91c1c;
    background: transparent;
    color: var(--accent-red) !important;
}

.btn-outline-info {
    color: var(--accent-info) !important;
    border: 2px solid var(--accent-info);
    background: transparent;
}
.btn-outline-info:hover {
    border-color: #0369a1;
    background: transparent;
    color: var(--accent-info) !important;
}

.btn-outline-success {
    color: var(--accent-green) !important;
    border: 2px solid var(--accent-green);
    background: transparent;
}
.btn-outline-success:hover {
    border-color: #047857;
    background: transparent;
    color: var(--accent-green) !important;
}

.btn-outline-secondary {
    color: #52525b !important;
    border: 2px solid #a3a3a3;
    background: transparent;
}
.btn-outline-secondary:hover {
    border-color: #52525b;
    background: transparent;
    color: var(--text-primary) !important;
}

.btn-outline-primary {
    color: var(--accent-blue) !important;
    border: 2px solid var(--accent-blue);
    background: transparent;
}
.btn-outline-primary:hover {
    border-color: var(--accent-blue-hover);
    background: transparent;
    color: var(--accent-blue) !important;
}

/* Tables */
table {
    width: 100%;
}

th {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-bottom: 1rem;
}

td {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

tr:last-child td {
    border-bottom: none;
}

/* Badges */
.badge {
    border-radius: 8px;
    padding: 0.5em 0.9em;
    font-weight: 600;
    font-size: 0.75rem;
}

/* Utility Classes */
.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
}

.text-gradient {
    background: linear-gradient(160deg, #1a1a1e 0%, #3d3d43 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    padding: 1.5rem;
    border-radius: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
}

.stat-value {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
    display: block;
    color: var(--text-primary);
}

.stat-label {
    color: var(--text-secondary);   /* Jetzt #3d3d43 → Kontrast 8.6:1 */
    font-size: 0.8rem;
    font-weight: 700;               /* War 600 – dicker für kleine Caps-Texte */
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.hover-lift {
    transition: var(--transition-smooth);
}

.hover-lift:hover {
    transform: translateY(-8px);
}

/* Animations */
.page-transition-enter {
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(20px);
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Callout Boxes (Vorsicht Falle) */
.callout {
    padding: 1.5rem;
    border-radius: 16px;
    margin: 2rem 0;
    border-left: 4px solid transparent;
    background: rgba(0, 0, 0, 0.02);
}

.callout-warning {
    border-left-color: #f59e0b; /* Amber */
    background: rgba(245, 158, 11, 0.06);
}

.callout-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: #d97706;
}

.callout-content {
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Metadata & Phase Badges */
.meta-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    color: var(--text-secondary) !important;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.badge-phase {
    background: rgba(99, 102, 241, 0.08) !important;
    color: var(--accent-blue) !important;
    border: 1px solid rgba(99, 102, 241, 0.15) !important;
    padding: 0.4em 0.8em;
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 6px;
}

.badge-phase-ap1 {
    background: rgba(245, 158, 11, 0.08) !important;
    color: #b45309 !important;
    border-color: rgba(245, 158, 11, 0.2) !important;
}

.badge-phase-ap2 {
    background: rgba(168, 85, 247, 0.08) !important;
    color: #7c3aed !important;
    border-color: rgba(168, 85, 247, 0.2) !important;
}

.lexikon-term {
    border-bottom: 1px dotted var(--accent-blue);
    cursor: help;
    color: var(--accent-blue);
    position: relative;
    transition: var(--transition-smooth);
}

.lexikon-term:hover {
    background: rgba(99, 102, 241, 0.08);
    color: var(--accent-blue-hover);
}

.lexikon-term[title]:hover::after {
    content: attr(title);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    font-size: 0.85rem;
    color: var(--text-primary);
    width: 250px;
    z-index: 1001;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    line-height: 1.4;
    white-space: normal;
}

/* Global Form & Input Styles for Task Creation etc */
input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="url"],
input[type="date"],
textarea,
select,
.form-control,
.form-select {
    width: 100%;
    background-color: #ffffff !important;  /* Weiß statt grauem Hintergrund */
    color: var(--text-primary) !important;
    border: 1.5px solid rgba(0, 0, 0, 0.22) !important;  /* War 0.12 – viel stärker */
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-smooth);
    margin-bottom: 0.5rem;
}

/* Fixed select icon for light mode */
.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%231d1d1f' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e") !important;
    background-repeat: no-repeat !important;
    background-position: right 0.75rem center !important;
    background-size: 16px 12px !important;
}

input:focus,
textarea:focus,
select:focus,
.form-control:focus,
.form-select:focus {
    outline: none !important;
    border-color: var(--accent-blue) !important;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15) !important;
}

/* Visibility fixes for placeholders */
::placeholder {
    color: #6e6e73 !important;   /* Dunkelgrau statt hellgrau */
    opacity: 1 !important;       /* War 0.7 – zu blass */
}

::-webkit-input-placeholder {
    color: #6e6e73 !important;
    opacity: 1 !important;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;               /* War 500 */
    color: var(--text-primary);     /* War text-secondary – zu blass */
}

small, .help-text {
    color: var(--text-secondary) !important;
    display: block;
    margin-top: 4px;
    font-size: 0.85rem;
}

/* Fix generic form groupings */
.form-group {
    margin-bottom: 1.5rem;
}

/* Global button focus and contrast consistency */
.btn-primary {
    background-color: var(--accent-blue) !important;
    color: #ffffff !important;
    font-weight: 600;
    box-shadow: 0 2px 8px 0 rgba(99, 102, 241, 0.2);
}

.btn-primary:active, .btn-primary:focus {
    background-color: var(--accent-blue-hover) !important;
}

/* Locked Exercise Card Styles */
.card-locked {
    opacity: 0.7 !important;
    position: relative;
    pointer-events: auto;
}

.card-locked:hover {
    transform: none !important;
    box-shadow: none !important;
}

.card-locked::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(242, 242, 247, 0.5);
    backdrop-filter: grayscale(1) blur(1px);
    border-radius: 20px;
    z-index: 5;
    pointer-events: none;
}

.lock-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    z-index: 6;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.badge-source {
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.65rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 500;
}

.unlock-info {
    font-size: 0.75rem;
    color: var(--accent-info);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* --- Improved Message Alerts --- */
.alert-container {
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.alert-message {
    padding: 1.25rem 1.75rem;
    border-radius: 16px;
    border-left: 5px solid transparent;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.08);
    border-color: var(--accent-green);
    color: #065f46;
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-left: 5px solid var(--accent-green);
}

.alert-error, .alert-danger {
    background: rgba(239, 68, 68, 0.08);
    border-color: var(--accent-red);
    color: #991b1b;
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-left: 5px solid var(--accent-red);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.08);
    border-color: #f59e0b;
    color: #92400e;
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-left: 5px solid #f59e0b;
}

.alert-info {
    background: rgba(14, 165, 233, 0.08);
    border-color: var(--accent-info);
    color: #0c4a6e;
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-left: 5px solid var(--accent-info);
}

.alert-message i {
    width: 20px;
    height: 20px;
    opacity: 0.9;
}

/* Search & Task Metrics */
.task-id-badge {
    background: rgba(79, 70, 229, 0.08);
    color: var(--accent-blue);
    padding: 2px 8px;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    font-weight: 700;
    border: 1px solid rgba(79, 70, 229, 0.25);  /* Stärkere Border */
}