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

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f5f5;
    min-height: 100vh;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    overflow: hidden;
    max-width: 400px;
    width: 100%;
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.login-header i {
    font-size: 3rem;
    margin-bottom: 10px;
}

.login-body {
    padding: 30px;
}

/* Project Cards */
.project-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    overflow: hidden;
    margin-bottom: 20px;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.project-card-body {
    padding: 20px;
}

.project-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.project-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: #212529;
    margin-bottom: 8px;
}

.project-location {
    color: #6c757d;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Photo Gallery */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.photo-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: all 0.3s ease;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.photo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.photo-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    cursor: pointer;
}

.photo-info {
    padding: 15px;
}

.photo-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: #6c757d;
    margin-bottom: 10px;
}

.photo-notes {
    font-size: 0.9rem;
    color: #212529;
    margin-bottom: 10px;
}

.photo-actions {
    display: flex;
    gap: 10px;
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 1000;
    border: none;
}

.fab:hover {
    transform: scale(1.1) rotate(90deg);
    box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

/* Modal Animations */
.modal.fade .modal-dialog {
    transform: scale(0.8);
    opacity: 0;
    transition: all 0.3s ease;
}

.modal.show .modal-dialog {
    transform: scale(1);
    opacity: 1;
}

.modal-content {
    border-radius: 15px;
    border: none;
}

.modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px 15px 0 0;
}

/* Buttons */
.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all 0.3s ease;
}

.btn-icon:hover {
    transform: scale(1.1);
}

/* File Upload Area */
.upload-area {
    border: 2px dashed #667eea;
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.upload-area:hover {
    background: #e9ecef;
    border-color: #764ba2;
}

.upload-area i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 15px;
}

/* User Table */
.user-table {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.table {
    margin-bottom: 0;
}

.table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .photo-grid {
        grid-template-columns: 1fr;
    }
    
    .fab {
        bottom: 20px;
        right: 20px;
        width: 55px;
        height: 55px;
    }
    
    .project-card-body {
        padding: 15px;
    }
}

/* Loading Spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.spinner-border-custom {
    width: 3rem;
    height: 3rem;
    border-width: 0.3rem;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #6c757d;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}