/* --- GLOBÁLNÍ NASTAVENÍ A PROMĚNNÉ --- */
:root {
    --primary-green: #2e7d32;
    --light-green: #a5d6a7;
    --dark-green: #1b5e20;
    --bg-gradient: linear-gradient(135deg, #f0f7f4 0%, #e3f2fd 100%);
    --text-main: #101828;
    --text-muted: #667085;
    --card-bg: #ffffff;
    --border-color: #eaecf0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- KONTEJNERY (Sjednocení šířky na 1200px) --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Toto zajistí, že obsah uprostřed vyplní místo a odtlačí patičku dolů */
.main-content, .content-grow {
    flex: 1 0 auto;
}

/* --- NAVIGACE --- */
.main-nav, .topbar {
    background: white;
    border-bottom: 1px solid #eee;
    padding: 12px 0 !important; 
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

.nav-content, .topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo, .brand a {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.brand-dot { color: var(--primary-green); }

.nav-links, .nav {
    display: flex;
    gap: 24px;
    list-style: none;
    align-items: center;
}

.nav-links a, .nav a {
    text-decoration: none;
    color: #475467;
    font-size: 0.95rem;
    font-weight: 500;
    transition: 0.2s;
    background: transparent !important;
    padding: 0;
}

.nav-links a:hover, .nav a:hover {
    color: var(--primary-green);
}

/* --- HERO SEKCE (Z tvého indexu) --- */
.hero { padding: 80px 0 60px; text-align: center; }
.hero h1 { font-size: 3rem; letter-spacing: -1px; line-height: 1.2; margin-bottom: 20px; color: var(--text-main); }
.hero p { font-size: 1.2rem; color: var(--text-muted); max-width: 700px; margin: 0 auto 40px; line-height: 1.6; }

.hero-btns { display: flex; gap: 15px; justify-content: center; margin-bottom: 60px; }

/* --- TLAČÍTKA --- */
.btn-reg, .btn-primary, .btn-submit {
    background: var(--primary-green);
    color: white !important;
    padding: 12px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: 0.3s;
    display: inline-flex;
    align-items: center;
}

.btn-reg:hover, .btn-primary:hover, .btn-submit:hover {
    background: var(--dark-green);
    transform: translateY(-2px);
}

.btn-log, .btn-back {
    background: white;
    color: var(--text-main);
    padding: 12px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    border: 1px solid #d0d5dd;
    transition: 0.3s;
}

/* --- KARTY (Features na indexu i Dashboard) --- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 40px; }

.f-card, .card {
    background: white;
    padding: 30px;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: 0.3s;
}

.f-card h3 { font-size: 1.25rem; margin: 20px 0 12px; }

/* --- TABULKY (Pro invoices.php) --- */
table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

table th {
    background-color: #f8fbf9;
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    padding: 18px 25px;
    border-bottom: 2px solid var(--border-color);
}

table td {
    padding: 16px 25px;
    border-bottom: 1px solid #f0f4f8;
}

/* --- PATIČKA (Tmavá, sjednocená) --- */
footer {
    background: #101828;
    color: #98a2b3;
    padding: 40px 0;
    width: 100%;
    flex-shrink: 0;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links a {
    color: #eaecf0;
    text-decoration: none;
    margin-left: 20px;
    font-size: 0.9rem;
}