/* ========================================
   BASE STYLES - EAN Reader Application
   Używane globalnie na wszystkich stronach
   ======================================== */

/* ==========================================
   CSS VARIABLES (DESKTOP & MOBILE)
   ========================================== */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --dark-color: #212529;
    --light-color: #f8f9fa;
}

/* ==========================================
   GLOBAL RESET (DESKTOP & MOBILE)
   ========================================== */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #212529;
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================
   NAVBAR (DESKTOP & MOBILE)
   ========================================== */

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;  /* DESKTOP: Rozmiar nazwy w navbar */
}

.navbar-text {
    color: rgba(255, 255, 255, 0.75) !important;
}

/* ==========================================
   MAIN CONTENT AREA (DESKTOP & MOBILE)
   ========================================== */

.content_container {
    flex: 1;
    width: 100%;
    padding: 0;
    margin: 0;
}

.main-container {
    width: 100%;
    max-width: 100%;
    padding: 0;
    margin: 0;
}

/* ==========================================
   FLASH MESSAGES (DESKTOP & MOBILE)
   ========================================== */

.alert {
    border-radius: 0.5rem;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.alert-dismissible .btn-close {
    padding: 0.75rem;
}

/* ==========================================
   BUTTONS (DESKTOP & MOBILE)
   ========================================== */

.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease-in-out;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,.15);
}

.btn:active {
    transform: translateY(0);
}

/* ==========================================
   FORMS (DESKTOP & MOBILE)
   ========================================== */

.form-control,
.form-select {
    border-radius: 0.375rem;
    border: 1px solid #ced4da;
    padding: 0.5rem 0.75rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus,
.form-select:focus {
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #495057;
}

/* ==========================================
   CARDS (DESKTOP & MOBILE)
   ========================================== */

.card {
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
    transition: box-shadow 0.3s ease-in-out;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,.15);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
    font-weight: 600;
}

/* ==========================================
   FOOTER (opcjonalny, DESKTOP & MOBILE)
   ========================================== */

.footer {
    background-color: #212529;
    color: #f8f9fa;
    padding: 2rem 0;
    margin-top: auto;
}

.footer a {
    color: #86b7fe;
    text-decoration: none;
}

.footer a:hover {
    color: #6ea8fe;
    text-decoration: underline;
}

/* ==========================================
   UTILITIES (DESKTOP & MOBILE)
   ========================================== */

.text-muted {
    color: #6c757d !important;
}

.bg-gradient {
    background: linear-gradient(180deg, rgba(255,255,255,0.15), rgba(255,255,255,0));
}

/* Loading Spinner */
.spinner-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

/* ==========================================
   ANIMATIONS (DESKTOP & MOBILE)
   ========================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

/* ==========================================
   SCROLLBAR STYLING (Webkit browsers)
   ========================================== */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}


/* ==========================================
   MOBILE STYLES (≤ 768px)
   ========================================== */

@media (max-width: 768px) {
    /* --- Navbar (MOBILE) --- */
    .navbar-brand {
        font-size: 1.1rem;  /* MOBILE: Mniejsza nazwa w navbar */
    }
    
    /* MOBILE: Menu rozwija się w DÓŁ pod hamburgerem */
    .navbar-collapse {
        width: 100%;
    }
    
    /* Wyloguj wyrównane do PRAWEJ w rozwiniętym menu */
    .navbar-nav.ms-auto {
        align-items: flex-end;
    }
    
    .navbar-nav .nav-link {
        text-align: right;
        padding: 0.75rem 1rem;
    }
    
    /* --- Layout (MOBILE) --- */
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    /* --- Buttons (MOBILE) --- */
    .btn {
        width: 100%;  /* MOBILE: Przyciski na całą szerokość */
        margin-bottom: 0.5rem;
    }
}


/* ==========================================
   MOBILE STYLES (≤ 576px)
   ========================================== */

@media (max-width: 576px) {
    /* --- Typography (MOBILE) --- */
    body {
        font-size: 0.9rem;  /* MOBILE: Mniejsza czcionka bazowa */
    }
    
    h1 {
        font-size: 1.75rem;  /* MOBILE: Mniejszy H1 */
    }
    
    h2 {
        font-size: 1.5rem;  /* MOBILE: Mniejszy H2 */
    }
}


/* ==========================================
   DARK MODE (opcjonalny)
   ========================================== */

@media (prefers-color-scheme: dark) {
    body {
        background-color: #212529;
        color: #f8f9fa;
    }
    
    .card {
        background-color: #343a40;
        color: #f8f9fa;
    }
    
    .form-control,
    .form-select {
        background-color: #495057;
        border-color: #6c757d;
        color: #f8f9fa;
    }
    
    .form-control:focus,
    .form-select:focus {
        background-color: #495057;
        color: #f8f9fa;
    }
}