/**
 * ENVISEN - Centrální CSS
 * Jednotný zelený design pro celou aplikaci
 * 
 * @version 1.0
 * @date 2026-02-12
 */

/* =================================================================
   BAREVNÁ PALETA
   ================================================================= */

:root {
    /* Hlavní zelené odstíny */
    --primary-dark: #1a4d2e;
    --primary: #2d6a4f;
    --primary-light: #40916c;
    --accent: #52b788;
    --accent-light: #74c69d;
    --accent-lightest: #95d5b2;
    
    /* Pozadí */
    --bg-dark: #0d1b2a;
    --bg-dark-alt: #1a2332;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    
    /* Text */
    --text-light: #ffffff;
    --text-light-secondary: rgba(255, 255, 255, 0.7);
    --text-dark: #212529;
    
    /* Stavy */
    --success: #52b788;
    --warning: #f4a261;
    --danger: #e63946;
    --info: #457b9d;
    
    /* Ohraničení a stíny */
    --border: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.2);
    --shadow: rgba(0, 0, 0, 0.3);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 
                 Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-alt) 100%);
    color: var(--text-light);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* =================================================================
   HEADER - JEDNOTNÁ HLAVIČKA
   ================================================================= */

.envisen-header {
    background: rgba(45, 106, 79, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 20px;
    box-shadow: 0 2px 10px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-light);
    text-decoration: none;
}

.header-nav {
    display: flex;
    gap: 15px;
    align-items: center;
}

.header-nav a {
    color: var(--text-light);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 5px;
    transition: background 0.3s;
    font-weight: 500;
}

.header-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* =================================================================
   CONTAINER & LAYOUT
   ================================================================= */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 20px;
}

.container-narrow {
    max-width: 800px;
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 4px 15px var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(82, 183, 136, 0.2);
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--text-light);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(82, 183, 136, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-danger {
    background: var(--danger);
    color: var(--text-light);
}

.btn-danger:hover {
    background: #d62839;
}

.btn-success {
    background: var(--success);
    color: var(--text-light);
}

.btn-block {
    display: block;
    width: 100%;
}

/* =================================================================
   FORMS
   ================================================================= */

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-light);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-light-secondary);
    font-size: 0.85rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-light);
    font-size: 1rem;
    transition: border-color 0.3s, background 0.3s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.15);
}

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

/* =================================================================
   ALERTS & MESSAGES
   ================================================================= */

.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(82, 183, 136, 0.1);
    border-color: var(--success);
    color: var(--accent-light);
}

.alert-warning {
    background: rgba(244, 162, 97, 0.1);
    border-color: var(--warning);
    color: #ffb07c;
}

.alert-danger {
    background: rgba(230, 57, 70, 0.1);
    border-color: var(--danger);
    color: #ff6b6b;
}

.alert-info {
    background: rgba(69, 123, 157, 0.1);
    border-color: var(--info);
    color: #74c0fc);
}

/* =================================================================
   TABLES
   ================================================================= */

.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: 10px;
    overflow: hidden;
}

thead {
    background: rgba(45, 106, 79, 0.5);
}

th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: var(--text-light);
}

td {
    padding: 12px 15px;
    border-top: 1px solid var(--border);
    color: var(--text-light-secondary);
}

tr:hover {
    background: var(--bg-card-hover);
}

/* =================================================================
   BADGES & STATUS
   ================================================================= */

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-success {
    background: var(--success);
    color: white;
}

.badge-warning {
    background: var(--warning);
    color: white;
}

.badge-danger {
    background: var(--danger);
    color: white;
}

.badge-info {
    background: var(--info);
    color: white;
}

/* =================================================================
   LOADING & SPINNERS
   ================================================================= */

.loading {
    text-align: center;
    padding: 40px 20px;
    color: var(--accent-light);
}

.spinner {
    border: 3px solid rgba(255,255,255,0.1);
    border-top: 3px solid var(--accent);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* HAMBURGER + AVATAR */
.hamburger{display:none;background:none;border:none;cursor:pointer;padding:8px;z-index:1001}
.hamburger span{display:block;width:24px;height:3px;background:var(--text-light);margin:4px 0;border-radius:2px;transition:transform 0.3s}
.nav-logout{opacity:0.7;font-size:0.9rem}.nav-logout:hover{opacity:1}
.nav-avatar{width:24px;height:24px;border-radius:50%;vertical-align:middle;margin-right:6px;border:1px solid rgba(255,255,255,0.3)}
.badge-success,.badge-warning,.badge-danger,.badge-info{display:inline-block;padding:4px 12px;border-radius:12px;font-size:0.85rem;font-weight:600}

/* SORTABLE (W2/W12) */
.sortable-ghost{opacity:0.4;background:rgba(82,183,136,0.2)!important}
.sortable-drag{box-shadow:0 8px 25px rgba(0,0,0,0.4)!important}
.drag-handle{cursor:grab;opacity:0.5;font-size:1.2rem;margin-right:8px;user-select:none}.drag-handle:hover{opacity:1}
.drag-handle:active{cursor:grabbing}

@media (max-width: 768px) {
    .envisen-header{padding:10px 15px}
    .header-content{flex-wrap:nowrap}
    .hamburger{display:block}
    .logo{height:32px}.logo-text{font-size:1.2rem}
    .header-nav{display:none;position:absolute;top:100%;left:0;right:0;background:rgba(26,77,46,0.98);backdrop-filter:blur(15px);flex-direction:column;padding:10px 0;box-shadow:0 8px 20px rgba(0,0,0,0.3)}
    .header-nav.nav-open{display:flex}
    .header-nav a{width:100%;padding:12px 20px;border-radius:0;text-align:left;border-bottom:1px solid rgba(255,255,255,0.05)}
    .nav-logout{opacity:1;color:var(--danger);border-top:1px solid rgba(255,255,255,0.1)}
    .container{padding:15px 12px}.card{padding:16px;border-radius:10px}
    h1{font-size:1.5rem!important}h2{font-size:1.3rem!important}
}
@media (max-width: 480px) {
    .logo-section{gap:8px}.logo{height:28px}.logo-text{font-size:1rem}
}

/* =================================================================
   UTILITY CLASSES
   ================================================================= */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden { display: none; }
.visible { display: block; }