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

:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --error-color: #ef4444;
    --background: #f1f5f9;
    --card-background: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
}

/* Dark mode variables */
body.dark-mode {
    --background: #0f172a;
    --card-background: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

body.dark-mode .card {
    background: rgba(30, 41, 59, 0.98);
    border: 1px solid rgba(71, 85, 105, 0.4);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.05);
}

body.dark-mode input,
body.dark-mode select,
body.dark-mode textarea {
    background: #334155;
    color: var(--text-primary);
    border-color: var(--border-color);
}

body.dark-mode input:focus,
body.dark-mode select:focus,
body.dark-mode textarea:focus {
    border-color: var(--primary-color);
    background: #475569;
}

body.dark-mode .btn-secondary {
    background: #475569;
    color: #f1f5f9;
}

body.dark-mode .btn-secondary:hover {
    background: #64748b;
}

body.dark-mode .btn-outline {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
}

body.dark-mode .btn-outline:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--primary-color);
}

body.dark-mode .modal {
    background: rgba(0, 0, 0, 0.8);
}

body.dark-mode .modal-content {
    background: var(--card-background);
    border: 1px solid var(--border-color);
}

body.dark-mode .notification-emoji {
    background: rgba(59, 130, 246, 0.2);
}

body.dark-mode .menu-dropdown {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

body.dark-mode .menu-item:hover {
    background: rgba(59, 130, 246, 0.1);
}

body.dark-mode .status-badge {
    filter: brightness(1.2);
}

/* Refresh button animation */
.icon-btn.spinning svg {
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

body.dark-mode .gallery-image:hover {
    transform: scale(1.02);
}

body.dark-mode hr {
    border-color: var(--border-color) !important;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #172554 100%);
    min-height: 100vh;
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.dark-mode {
    background: linear-gradient(135deg, #020617 0%, #0c0a1f 50%, #0f172a 100%);
}

.container {
    width: 90%;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Screens */
.screen {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
}

.screen.active {
    display: block;
    position: relative;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Card Styles */
.card {
    background: var(--card-background);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

/* Login Screen */
#loginScreen {
    min-height: 100vh;
}

#loginScreen.active {
    display: flex !important;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    z-index: 1000;
}

#loginScreen .card {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.logo {
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
}

.logo img {
    border-radius: 8px;
    transition: transform 0.2s ease;
}

.logo img:hover {
    transform: scale(1.05);
}

h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 14px;
}

.header-buttons {
    display: flex;
    gap: 12px;
    align-items: center;
}

.header-buttons.mobile-menu-container {
    position: relative;
}

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

.empty-state svg {
    margin-bottom: 24px;
    opacity: 0.8;
}

.empty-state h3 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 16px;
}