/* Theme System - wwwroot/css/theme.css */
:root {
    /* Light theme */
    --bg-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --bg-surface: rgba(255, 255, 255, 0.95);
    --bg-card: rgba(255, 255, 255, 0.98);
    --bg-glass: rgba(255, 255, 255, 0.1);
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-accent: #667eea;
    --text-white: #ffffff;
    --border-color: rgba(102, 126, 234, 0.2);
    --border-light: rgba(0, 0, 0, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.15);
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.1);
    --navbar-bg: rgba(255, 255, 255, 0.9);
    --footer-bg: rgba(255, 255, 255, 0.8);
    /* Status colors */
    --color-primary: #667eea;
    --color-success: #48bb78;
    --color-warning: #ed8936;
    --color-danger: #f56565;
    --color-info: #4299e1;
    --color-dark: #2d3748;
    --color-light: #f7fafc;
}

[data-theme="dark"] {
    /* Dark theme */
    --bg-primary: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
    --bg-secondary: linear-gradient(135deg, #4a5568 0%, #2d3748 100%);
    --bg-surface: rgba(26, 32, 44, 0.95);
    --bg-card: rgba(45, 55, 72, 0.98);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    --text-accent: #90cdf4;
    --text-white: #f7fafc;
    --border-color: rgba(144, 205, 244, 0.2);
    --border-light: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.4);
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.3);
    --navbar-bg: rgba(26, 32, 44, 0.9);
    --footer-bg: rgba(26, 32, 44, 0.8);
    /* Status colors for dark mode */
    --color-primary: #90cdf4;
    --color-success: #68d391;
    --color-warning: #fbb439;
    --color-danger: #fc8181;
    --color-info: #63b3ed;
    --color-dark: #1a202c;
    --color-light: #2d3748;
}

* {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    position: relative;
}

    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%), radial-gradient(circle at 40% 80%, rgba(120, 219, 255, 0.3) 0%, transparent 50%);
        pointer-events: none;
        z-index: -1;
    }

[data-theme="dark"] body::before {
    background: radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.1) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.1) 0%, transparent 50%), radial-gradient(circle at 40% 80%, rgba(120, 219, 255, 0.1) 0%, transparent 50%);
}

/* Layout Components */
.navbar {
    background: var(--navbar-bg) !important;
    backdrop-filter: blur(20px);
    border: none !important;
    box-shadow: var(--shadow);
    border-radius: 0 0 20px 20px;
    margin-bottom: 2rem;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(45deg, var(--color-primary), #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    color: var(--text-primary) !important;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

    .nav-link::before {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        width: 0;
        height: 2px;
        background: linear-gradient(45deg, var(--color-primary), #764ba2);
        transform: translateX(-50%);
        transition: width 0.3s ease;
    }

    .nav-link:hover::before {
        width: 100%;
    }

    .nav-link:hover {
        color: var(--text-accent) !important;
        transform: translateY(-1px);
    }

main {
    background: var(--bg-surface);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    min-height: 60vh;
}

    main:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-2px);
    }

.footer {
    background: var(--footer-bg) !important;
    backdrop-filter: blur(20px);
    border-radius: 20px 20px 0 0;
    border: 1px solid var(--border-color);
    border-bottom: none;
    color: var(--text-secondary) !important;
    margin-top: 3rem;
    padding: 1.5rem 0;
}

    .footer a {
        color: var(--text-accent);
        text-decoration: none;
        transition: all 0.3s ease;
    }

        .footer a:hover {
            color: var(--text-primary);
            transform: translateY(-1px);
        }

/* Theme Toggle */
.theme-toggle {
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    padding: 8px 16px;
    color: var(--text-primary);
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

    .theme-toggle:hover {
        background: var(--bg-secondary);
        transform: scale(1.05);
        box-shadow: var(--shadow-hover);
    }

.navbar-toggler {
    border: none;
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    color: var(--text-primary);
}

    .navbar-toggler:focus {
        box-shadow: none;
    }

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='currentColor' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='m4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-glass);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, var(--color-primary), #764ba2);
    border-radius: 4px;
}

    ::-webkit-scrollbar-thumb:hover {
        background: linear-gradient(45deg, #764ba2, var(--color-primary));
    }

/* Responsive Design */
@media (max-width: 768px) {
    main {
        padding: 1.5rem;
        margin: 1rem 0;
        border-radius: 16px;
    }

    .navbar {
        border-radius: 0 0 16px 16px;
    }

    .footer {
        border-radius: 16px 16px 0 0;
    }
}