/* static/css/main.css */

/* --- Moderní CSS proměnné --- */
:root {
    --primary-grad: linear-gradient(135deg, #00b4db, #0083b0); /* Moderní tyrkysovo-modrý gradient */
    --accent-grad: linear-gradient(135deg, #7f00ff, #e100ff);  /* Moderní fialovo-růžový gradient */
    --success-grad: linear-gradient(135deg, #11998e, #38ef7d); /* Moderní zelený gradient */
    --danger-grad: linear-gradient(135deg, #ff416c, #ff4b2b);  /* Moderní červený gradient */
    
    --bg-primary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #0f172a; /* Slate 900 */
    --text-secondary: #475569; /* Slate 600 */
    --text-light: #94a3b8; /* Slate 400 */
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    
    --border-radius-sm: 10px;
    --border-radius-md: 18px;
    --border-radius-lg: 28px;
    
    --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Globální styly --- */
body {
    font-family: 'Open Sans', sans-serif;
    padding-top: 85px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.65;
}

h1, h2, h3, h4, h5, h6, .navbar-brand {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* --- Vylepšení navigace (Glassmorphism) --- */
.navbar {
    background: rgba(15, 23, 42, 0.88) !important; /* Velmi tmavě šedá, poloprůhledná */
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 16px 0;
    transition: var(--transition-smooth);
}

.navbar-brand {
    font-size: 1.35rem;
    font-weight: 800;
    background: linear-gradient(135deg, #38ef7d, #00b4db);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition-smooth);
}

.navbar-brand:hover {
    filter: brightness(1.1);
    transform: scale(1.02);
}

.navbar-nav .nav-link {
    font-weight: 600;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8) !important;
    padding: 6px 16px !important;
    position: relative;
    transition: var(--transition-smooth);
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 16px;
    right: 16px;
    height: 2.5px;
    background: var(--primary-grad);
    border-radius: 10px;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar-nav .nav-link:hover {
    color: #ffffff !important;
}

.navbar-nav .nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* --- Moderní karty (Cards) --- */
.card {
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-card);
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(0, 180, 219, 0.25);
}

.card-img-top-wrapper {
    overflow: hidden;
    position: relative;
}

.card-img-top {
    transition: var(--transition-smooth);
    display: block;
    width: 100%;
}

.card:hover .card-img-top {
    transform: scale(1.05);
}

.card-body {
    padding: 1.5rem;
}

/* --- Tlačítka (Buttons) --- */
.btn {
    border-radius: var(--border-radius-sm);
    padding: 9px 22px;
    font-weight: 700;
    transition: var(--transition-smooth);
    border: none;
    font-size: 0.9rem;
    letter-spacing: 0.01em;
}

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

.btn-primary:hover {
    background: var(--primary-grad);
    filter: brightness(1.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 180, 219, 0.35);
}

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

.btn-success:hover {
    background: var(--success-grad);
    filter: brightness(1.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(56, 239, 125, 0.35);
}

.btn-secondary {
    background: #e2e8f0;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: #cbd5e1;
    transform: translateY(-2px);
}

.btn-outline-primary {
    background: transparent;
    border: 2px solid #00b4db;
    color: #0083b0;
    font-weight: 700;
}

.btn-outline-primary:hover {
    background: var(--primary-grad);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 180, 219, 0.35);
}

/* --- Hero Banner (Homepage) --- */
.hero-section {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
    border-radius: var(--border-radius-lg);
    padding: 70px 50px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: 50px;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 180, 219, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(127, 0, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: #94a3b8;
    margin-bottom: 35px;
    max-width: 600px;
}

.hero-logo-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-md);
    padding: 20px;
    display: inline-block;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.homepage-logo {
    height: auto;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

@media (min-width: 768px) {
    .homepage-logo {
        max-width: 330px;
    }
}

@media (max-width: 767.98px) {
    .homepage-logo {
        width: 80%;
        margin-left: auto;
        margin-right: auto;
    }
    .hero-section {
        padding: 50px 30px;
        text-align: center;
    }
    .hero-title {
        font-size: 2.2rem;
    }
}

/* --- E-shop categories / badges --- */
.category-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 30px;
}

.category-badge-link {
    text-decoration: none !important;
}

.category-badge {
    padding: 10px 22px;
    border-radius: 30px;
    background: white;
    border: 1px solid rgba(226, 232, 240, 0.8);
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.category-badge.active {
    background: var(--primary-grad);
    color: white !important;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(0, 180, 219, 0.3);
}

.category-badge:hover:not(.active) {
    background: #e2e8f0;
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* --- Patička (Footer) --- */
.footer {
    background-color: #0f172a !important;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: #94a3b8 !important;
    padding: 45px 0;
    margin-top: 60px;
}

.footer a {
    color: #94a3b8 !important;
    transition: var(--transition-smooth);
    font-weight: 600;
}

.footer a:hover {
    color: #ffffff !important;
}

/* --- Zprávy (Alerts) --- */
.alert {
    border-radius: var(--border-radius-sm);
    border: none;
    box-shadow: var(--shadow-sm);
    font-weight: 600;
    font-size: 0.95rem;
}

.alert-success {
    background-color: #ecfdf5;
    color: #065f46;
    border-left: 4px solid #10b981;
}

.alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border-left: 4px solid #ef4444;
}

/* --- Vylepšení formulářů --- */
.form-control, .form-select {
    border-radius: var(--border-radius-sm);
    border: 1px solid #cbd5e1;
    padding: 10px 14px;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-control:focus, .form-select:focus {
    border-color: #00b4db;
    box-shadow: 0 0 0 4px rgba(0, 180, 219, 0.15);
    outline: none;
}