/*
 * Modernes Grunddesign für das neue I4Dashboard‑Frontend.
 * Farbpalette orientiert sich an großen Tech‑Unternehmen: dezente Hintergründe,
 * kräftige Akzente und viel Weißraum.
 */

:root {
    --color-primary: #2563EB;
    --color-primary-dark: #1D4ED8;
    --color-secondary: #0F172A;
    --color-text: #334155;
    --color-light: #F8FAFC;
    --color-bg: #FFFFFF;
    --color-success: #22C55E;
    --color-danger: #EF4444;
    --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* Base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: var(--font-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.5;
}
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    color: var(--color-primary-dark);
}

/* Layout helpers */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* Navigation bar */
.navbar {
    background-color: var(--color-bg);
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 1000;
}
.navbar .nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}
.navbar .logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-secondary);
}
.navbar .logo span {
    color: var(--color-primary);
}
.navbar ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    align-items: center;
}
.navbar li a {
    font-weight: 600;
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
}
.navbar li a.button {
    background-color: var(--color-primary);
    color: #fff;
    transition: background-color 0.2s ease;
}
.navbar li a.button:hover {
    background-color: var(--color-primary-dark);
}

/* Hero section */
.hero {
    background: radial-gradient(circle at top left, #EFF6FF 0%, #FFFFFF 100%);
    padding: 4rem 0 3rem;
    text-align: center;
}
.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}
.hero h1 span {
    color: var(--color-primary);
}
.hero p {
    font-size: 1.1rem;
    color: #64748b;
    max-width: 650px;
    margin: 0.5rem auto 2rem;
}
.hero .cta {
    display: flex;
    justify-content: center;
    gap: 1rem;
}
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}
.btn-primary {
    background-color: var(--color-primary);
    color: #fff;
}
.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
}
.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}
.btn-secondary:hover {
    background-color: var(--color-primary);
    color: #fff;
}

/* Feature section */
.features {
    padding: 3rem 0;
    background-color: var(--color-light);
}
.features .feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}
.feature {
    background-color: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.8rem;
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.feature:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}
.feature .icon {
    font-size: 2rem;
    margin-bottom: 0.8rem;
}
.feature h3 {
    margin-bottom: 0.6rem;
    font-size: 1.2rem;
    color: var(--color-secondary);
}
.feature p {
    font-size: 0.95rem;
    color: #64748b;
}

/* Card section (Dashboard) */
.card {
    background-color: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

/* Table styles */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.5rem 0;
}
th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}
th {
    background-color: var(--color-light);
    font-weight: 600;
}

/* Forms */
form .form-group {
    margin-bottom: 1rem;
}
form label {
    display: block;
    margin-bottom: 0.3rem;
    font-weight: 600;
}
form input, form select {
    width: 100%;
    padding: 0.7rem;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-family: inherit;
}

/* Footer */
.footer {
    background-color: var(--color-secondary);
    color: #fff;
    padding: 2rem 0;
    margin-top: 4rem;
    font-size: 0.9rem;
}
.footer .footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 2rem;
}
.footer h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
}
.footer ul {
    list-style: none;
}
.footer ul li {
    margin-bottom: 0.5rem;
}
.footer ul li a {
    color: #cbd5e1;
    text-decoration: none;
}
.footer ul li a:hover {
    color: #fff;
}
.footer .copyright {
    text-align: center;
    margin-top: 2rem;
    color: #94a3b8;
}

/* Utility classes */
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.hidden { display: none; }
.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}
.alert-success {
    background-color: #dcfce7;
    color: #166534;
}
.alert-danger {
    background-color: #fee2e2;
    color: #b91c1c;
}