/* ==========================================================================
   1. ZÁKLADNÍ NASTAVENÍ A PROMĚNNÉ
   ========================================================================== */
:root {
    --primary-color: #0284c7;
    --primary-hover: #0369a1;
    --success-color: #0d9488;
    --success-hover: #0f766e;
    --danger-color: #dc2626;
    --danger-hover: #b91c1c;
    --bg-body: #f1f5f9;
    --bg-card: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #cbd5e1;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    margin: 0;
    padding: 20px 10px;
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ==========================================================================
   2. KARTY A SEKCÍ PŘEHLEDU
   ========================================================================== */
.card-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
}

/* Mřížka pro korpusy */
.korpus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.korpus-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.korpus-card-header {
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 8px;
    margin-bottom: 12px;
}

.korpus-title {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-main);
    font-weight: 700;
}

.korpus-dimensions {
    font-size: 0.9rem;
    color: #334155;
    background: #f8fafc;
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
    margin-bottom: 12px;
}

.korpus-actions {
    display: flex;
    gap: 6px;
    width: 100%;
    align-items: center;
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px solid #f1f5f9;
}

/* ==========================================================================
   3. TLAČÍTKA A OVLÁDACÍ PRVKY
   ========================================================================== */
button, .btn-primary, .btn-success, .btn-danger {
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-decoration: none;
}

button:active {
    transform: scale(0.98);
}

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

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

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

/* ==========================================================================
   4. FORMULÁŘE A VSTUPNÍ POLE
   ========================================================================== */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.form-step-block {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 15px;
}

.step-header {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-main);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.step-number {
    background: #e0f2fe;
    color: var(--primary-color);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.85rem;
}

.sub-card {
    background: #f8fafc;
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
    margin-top: 10px;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: #475569;
    margin-bottom: 4px;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
select,
textarea {
    width: 100%;
    height: 38px;
    padding: 6px 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    background-color: #ffffff;
    color: var(--text-main);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

/* Obal pro velké vstupy rozměrů s tlačítkem vyprázdnit */
.dimension-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.big-dimension-input {
    width: 100%;
    padding-right: 35px !important;
}

.btn-clear-dim {
    position: absolute;
    right: 6px;
    background: transparent;
    border: none;
    color: #94a3b8;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0 6px;
    height: 100%;
}

.btn-clear-dim:hover {
    color: var(--danger-color);
}

/* ==========================================================================
   5. MODÁLNÍ OKNO (VYSKAKOVACÍ OKNO)
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 15px;
}

.modal-box {
    position: relative;
    background: #ffffff;
    border-radius: 12px;
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 25px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
}

/* TRVALE VIDITELNÉ TLAČÍTKO PRO ZAVŘENÍ (KŘÍŽEK PŘIŠPENDLENÝ NAHOŘE) */
.modal-close-btn {
    position: sticky;
    top: 0px;
    float: right;
    z-index: 99999;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    color: #64748b;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    margin-top: -5px;
    margin-right: -5px;
    margin-bottom: -36px;
    transition: all 0.2s ease;
}

.modal-close-btn:hover {
    color: var(--danger-color);
    background: #fef2f2;
    border-color: #fecaca;
    transform: scale(1.08);
}

/* ==========================================================================
   6. PLOVOUCÍ TLAČÍTKA (FAB)
   ========================================================================== */
.fab-container {
    position: fixed;
    bottom: 25px;
    right: 25px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 9000;
}

.fab-btn {
    background-color: #0f172a;
    color: #ffffff;
    border-radius: 30px;
    padding: 10px 18px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid #334155;
}

.fab-btn:hover {
    background-color: #1e293b;
    transform: translateY(-2px);
}

.fab-icon {
    background: var(--primary-color);
    color: #fff;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
}

.fab-text {
    font-size: 0.9rem;
    font-weight: 600;
}

/* ==========================================================================
   7. RESPONZIVNÍ ÚPRAVY
   ========================================================================== */
@media (max-width: 640px) {
    body {
        padding: 10px 5px;
    }
    .modal-box {
        padding: 15px;
    }
    .korpus-grid {
        grid-template-columns: 1fr;
    }
    .fab-container {
        bottom: 15px;
        right: 15px;
    }
}