:root {
    --primary: #4f46e5;
    --secondary: #818cf8;
    --dark: #1f2937;
    --light: #f3f4f6;
    --white: #ffffff;
    --danger: #ef4444;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', sans-serif; }
body { background: var(--light); color: var(--dark); }
a { text-decoration: none; color: inherit; }

/* Navbar */
.navbar {
    background: var(--white);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

/* Logo estilizado */
.navbar .logo { 
    font-size: 1.5rem; 
    font-weight: bold; 
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.navbar .logo i {
    font-size: 1.8rem;
}

/* Menu de navegação */
.navbar .menu {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Botões de Navegação Estilizados */
.nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-btn i {
    font-size: 1.1rem;
}

.nav-btn span {
    font-size: 0.9rem;
}

/* Dashboard Button */
.dashboard-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.dashboard-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    color: white;
}

/* Álbum Button */
.album-btn {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.album-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 87, 108, 0.4);
    color: white;
}

/* Categorias Button */
.categorias-btn {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.categorias-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 172, 254, 0.4);
    color: white;
}

/* Upload Button */
.upload-btn {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: white;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(67, 233, 123, 0.4);
    color: white;
}

/* User Info estilizado */
.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 15px;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    border-radius: 25px;
    color: white;
    font-weight: bold;
}

.user-info i {
    font-size: 1.2rem;
}

/* Logout Button estilizado */
.btn-logout {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, var(--danger), #ff6b6b);
    color: white !important;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 500;
    transition: all 0.3s ease;
    margin-left: 5px;
}

.btn-logout:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
    color: white !important;
}

/* Efeito de clique nos botões */
.nav-btn:active, .btn-logout:active {
    transform: scale(0.95);
}

/* Efeito ripple nos botões */
.nav-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    pointer-events: none;
}

.nav-btn:hover::before {
    width: 300px;
    height: 300px;
}

/* Container */
.container { max-width: 1200px; margin: 2rem auto; padding: 0 1rem; }

/* Forms & Inputs */
input, select, button {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin: 5px 0;
    width: 100%;
}
button, .btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    font-weight: bold;
}
button:hover { background: var(--secondary); }
.btn-danger { background: var(--danger); color: white; padding: 5px 10px; font-size: 0.9rem; }
.form-inline { display: flex; gap: 10px; margin-bottom: 20px; }
.form-inline input { flex: 1; }
.form-inline button { width: auto; }

/* Login */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
}
.error { color: var(--danger); margin-bottom: 10px; }

/* Alert estilizados */
.alert { 
    padding: 1rem; 
    border-radius: 10px; 
    margin-bottom: 15px; 
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease;
}

.alert i {
    font-size: 1.2rem;
}

.alert-success { 
    background: linear-gradient(135deg, #d4fc79 0%, #96e6a1 100%);
    color: #065f46;
    border-left: 4px solid #065f46;
}
.alert-error { 
    background: linear-gradient(135deg, #fad0c4 0%, #ffd1ff 100%);
    color: #991b1b;
    border-left: 4px solid #991b1b;
}
.alert-info {
    background: linear-gradient(135deg, #a1c4fd 0%, #c2e9fb 100%);
    color: #1e3c72;
    border-left: 4px solid #1e3c72;
}

/* Animações */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Dashboard Cards */
.dashboard-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin-bottom: 30px; }
.card { background: var(--white); padding: 20px; border-radius: 10px; box-shadow: var(--shadow); text-align: center; transition: transform 0.3s; }
.card:hover { transform: translateY(-5px); }
.card h3 { font-size: 2rem; color: var(--primary); }

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}
.photo-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}
.photo-card:hover { transform: translateY(-5px); }
.img-wrapper { height: 200px; overflow: hidden; cursor: zoom-in; }
.img-wrapper img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.img-wrapper img:hover { transform: scale(1.05); }
.info { padding: 15px; position: relative; }
.info h4 { font-size: 1rem; margin-bottom: 5px; }
.badge { background: var(--secondary); color: white; padding: 2px 8px; border-radius: 10px; font-size: 0.8rem; }
.date { font-size: 0.8rem; color: #666; float: right; }
.btn-delete { 
    position: absolute; 
    top: 10px; 
    right: 10px; 
    color: var(--danger); 
    background: rgba(255,255,255,0.9);
    border: none; 
    font-size: 1.2rem; 
    cursor: pointer;
    width: auto;
    padding: 5px 8px;
    border-radius: 5px;
    transition: all 0.3s;
}
.btn-delete:hover { 
    background: var(--danger); 
    color: white;
    transform: scale(1.1);
}

/* Pagination */
.pagination { display: flex; justify-content: center; gap: 10px; margin-top: 30px; }
.pagination a { 
    padding: 8px 15px; 
    background: var(--white); 
    border: 1px solid #ddd; 
    border-radius: 5px;
    transition: all 0.3s;
}
.pagination a:hover { 
    background: var(--primary); 
    color: white; 
    border-color: var(--primary);
    transform: translateY(-2px);
}
.pagination a.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0; top: 0;
    width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.9);
    animation: fadeIn 0.3s ease;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.lightbox-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 80vh;
    position: relative;
    top: 50%;
    transform: translateY(-50%);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}
.close {
    position: absolute;
    top: 20px; right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
}
.close:hover {
    color: var(--danger);
    transform: scale(1.1);
}
#caption {
    margin: auto;
    display: block;
    width: 80%;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar { 
        flex-direction: column; 
        gap: 10px;
        padding: 1rem;
    }
    
    .navbar .logo {
        width: 100%;
        justify-content: center;
    }
    
    .navbar .menu { 
        display: flex; 
        flex-wrap: wrap; 
        justify-content: center;
        width: 100%;
        gap: 0.5rem;
    }
    
    .nav-btn, .btn-logout {
        width: auto;
        padding: 0.5rem 1rem;
    }
    
    .nav-btn span, .btn-logout span {
        font-size: 0.8rem;
    }
    
    .user-info {
        margin-left: 0;
        margin-top: 5px;
    }
    
    .form-inline { 
        flex-direction: column;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .dashboard-cards {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }
}

/* Tablet Responsive */
@media (min-width: 769px) and (max-width: 1024px) {
    .nav-btn, .btn-logout {
        padding: 0.5rem 1rem;
    }
    
    .nav-btn span, .btn-logout span {
        font-size: 0.85rem;
    }
}

/* Scrollbar Personalizada */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--secondary), var(--primary));
}

/* Badge para notificações nos botões */
.nav-btn {
    position: relative;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger);
    color: white;
    border-radius: 50%;
    padding: 2px 6px;
    font-size: 0.7rem;
    font-weight: bold;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}