/* =========================================================================
   STYLE.CSS - Jediný CSS soubor pro aplikaci Evidence domácích mazlíčků
   ========================================================================= */

/* --- 1. Proměnné (Tmavý režim a barvy) --- */
:root {
    --bg-color: #0d0e12;
    /* Tmavé pozadí celé stránky */
    --surface-color: #171920;
    /* Pozadí karet a formulářů */
    --surface-color-light: #22242c;
    /* Světlejší prvek na kartě (hover) */

    --text-primary: #e6e9f0;
    /* Hlavní světlý text */
    --text-secondary: #9aa0b1;
    /* Doplňkový / ztlumený text */

    /* Zvýrazňovací barvy (Accent colors) */
    --primary-color: #3b82f6;
    /* Hlavní modrá (pro tlačítka) */
    --primary-hover: #2563eb;
    /* Tmavší modrá (hover pro tlačítka) */

    --danger-color: #ef4444;
    /* Červená pro chyby a smazání */
    --danger-hover: #dc2626;
    /* Tmavší červená pro hover */

    --success-color: #10b981;
    /* Zelená pro úspěšné zprávy */
    --success-bg: rgba(16, 185, 129, 0.1);
    /* Průhledná zelená pro pozadí zpráv */

    --border-color: #2d313d;
    /* Barva jemných rámečků */

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --transition: all 0.3s ease;
}

/* --- 2. ZÁKLADNÍ RESET --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* --- 3. LAYOUT A KONTEJNERY --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-content {
    flex: 1;
    /* Zabere zbytek výšky stránky mezi hlavičkou a patičkou */
    padding: 40px 0;
    display: flex;
    flex-direction: column;
}

/* --- 4. NAVIGACE (Responzivní s hamburger menu bez JS) --- */
.main-header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.container-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    padding-bottom: 15px;
}

.logo {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-text {
    /* Skrytí na hodně malých mobilech pro čistotu */
    display: block;
}

.logo:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.main-nav ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 20px;
}

.main-nav a {
    color: var(--text-secondary);
    font-weight: 500;
}

.main-nav a:hover {
    color: var(--text-primary);
    text-decoration: none;
}

/* Informace o uživateli v menu */
.user-info {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    background-color: rgba(255, 255, 255, 0.05);
}

/* Hamburger a checkbox schované na PC */
.nav-toggle,
.nav-toggle-label {
    display: none;
}

/* --- 5. TLAČÍTKA A FORMULÁŘE --- */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-align: center;
    transition: var(--transition);
    text-decoration: none;
    font-size: 1rem;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

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

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background-color: var(--surface-color-light);
    color: white;
}

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

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

.w-100 {
    width: 100%;
}

/* Stylování pro konkrétní tlačítka v navigaci */
.btn-register {
    background-color: var(--primary-color);
    color: white !important;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
}

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

.btn-logout {
    color: var(--danger-color) !important;
}

.btn-logout:hover {
    color: var(--danger-hover) !important;
}

/* Formuláře */
.form-container {
    max-width: 500px;
    margin: 0 auto;
    width: 100%;
}

.card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

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

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
select {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: border-color 0.2s;
    font-family: inherit;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

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

/* --- 6. UPOZORNĚNÍ (ALERTS) --- */
.alert {
    padding: 15px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
    background-color: var(--success-bg);
    color: #6ee7b7;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.1);
    color: #93c5fd;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* --- 7. HOME HERO SEKCE --- */
.hero {
    max-width: 800px;
    margin: 60px auto;
}

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

.hero h1 {
    font-size: 3rem;
    background: linear-gradient(135deg, #e6e9f0 0%, #9aa0b1 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.hero-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* --- ABOUT SEKCE --- */
.about-section {
    margin-top: 60px;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.about-card {
    text-align: center;
    padding: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.about-card h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* --- 12. VIDEO SEKCE --- */
.video-section {
    margin-top: 80px;
    padding-top: 20px;
}

.video-wrapper {
    padding: 10px;
    /* Jemný okraj kolem samotného videa */
    border-radius: var(--radius-lg);
    background-color: var(--surface-color);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    margin: 0 auto;
    width: 100%;
}

.responsive-video {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    background-color: #000;
    border-radius: var(--radius-sm);
    display: block;
}

.video-description {
    color: var(--text-secondary);
    font-size: 1rem;
    font-style: italic;
}

/* --- 8. VÝPIS MAZLÍČKŮ --- */
.header-with-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.table-responsive {
    overflow-x: auto;
    padding: 0;
    /* Tabulka vyžije prostor od kraje ke kraji v rámci karty */
}

.pets-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.pets-table th,
.pets-table td {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}

.pets-table th {
    background-color: var(--surface-color-light);
    color: var(--text-primary);
    font-weight: 600;
}

.pets-table tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

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

.actions-cell {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    display: inline-block;
    cursor: pointer;
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
}

.btn-sm.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-sm.btn-outline:hover {
    background-color: var(--surface-color-light);
    color: white;
}

.btn-sm.btn-danger {
    background-color: var(--danger-color);
    color: white;
    border: 1px solid var(--danger-color);
}

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

/* --- 9. UTILITY A MARGINY --- */
.mt-2 {
    margin-top: 10px;
}

.mt-3 {
    margin-top: 15px;
}

.mt-4 {
    margin-top: 25px;
}

.mb-0 {
    margin-bottom: 0;
}

.mb-3 {
    margin-bottom: 15px;
}

.mb-4 {
    margin-bottom: 25px;
}

/* --- 10. PATIČKA --- */
.main-footer {
    padding: 30px 0;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* --- 11. RESPONZIVITA (MEDIA QUERIES) --- */
@media screen and (max-width: 768px) {

    /* Menu / Navigace na mobilech */
    .nav-toggle-label {
        display: block;
        cursor: pointer;
        padding: 5px;
    }

    .nav-toggle-label span,
    .nav-toggle-label span::before,
    .nav-toggle-label span::after {
        display: block;
        background: var(--text-primary);
        height: 3px;
        width: 25px;
        border-radius: 2px;
        position: relative;
    }

    .nav-toggle-label span::before,
    .nav-toggle-label span::after {
        content: '';
        position: absolute;
    }

    .nav-toggle-label span::before {
        bottom: 8px;
    }

    .nav-toggle-label span::after {
        top: 8px;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        background: var(--surface-color);
        width: 100%;
        border-bottom: 1px solid var(--border-color);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-in-out;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        gap: 15px;
    }

    .nav-toggle:checked~.main-nav {
        max-height: 400px;
    }

    /* Ostatní responzivita */
    .hero h1 {
        font-size: 2rem;
    }

    .logo-text {
        display: none;
        /* Na mobilech schováme dlouhý text a necháme jen logo */
    }

    .hero-actions {
        flex-direction: column;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .filter-form {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-actions {
        justify-content: space-between;
    }
}