:root {
    --bg-color: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #8b5cf6;
    --accent-glow: rgba(139, 92, 246, 0.4);
    --glass-bg: rgba(30, 41, 59, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --danger: #ef4444;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background Blobs for Glassmorphism */
.background-elements {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    filter: blur(80px);
    border-radius: 50%;
    opacity: 0.5;
    animation: float 10s infinite alternate;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, #8b5cf6, #3b82f6);
}

.blob-2 {
    bottom: -10%;
    right: -10%;
    width: 35vw;
    height: 35vw;
    background: radial-gradient(circle, #ec4899, #8b5cf6);
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.1); }
}

/* Glass Panel Utility */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
}

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

.login-box {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    animation: fadeUp 0.6s ease-out;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.input-with-icon input {
    width: 100%;
    padding: 14px 16px 14px 44px;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 15px;
    transition: all 0.3s ease;
}

.input-with-icon input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 12px var(--accent-glow);
    background: rgba(15, 23, 42, 0.8);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border: none;
    border-radius: 12px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.6);
}

.btn-block {
    width: 100%;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* App Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    margin: 16px;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 24px;
    text-align: center;
}

.sidebar-header h2 {
    font-size: 24px;
    letter-spacing: 1px;
}

.highlight {
    color: var(--accent-color);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    padding: 0 16px 24px;
    gap: 8px;
    flex-grow: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.nav-link:hover, .nav-link.active {
    background: rgba(139, 92, 246, 0.1);
    color: var(--text-primary);
    border-color: rgba(139, 92, 246, 0.2);
}

.nav-link i {
    width: 24px;
    text-align: center;
    font-size: 18px;
}

.nav-link.active {
    box-shadow: inset 4px 0 0 var(--accent-color);
}

.btn-logout {
    background: transparent;
    width: 100%;
    text-align: left;
    font-family: inherit;
    font-size: 16px;
    cursor: pointer;
    color: #fca5a5;
}
.btn-logout:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    padding: 16px 16px 16px 0;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    margin-bottom: 24px;
    border-radius: 16px;
}

.topbar-title {
    font-size: 20px;
    font-weight: 600;
}

.topbar-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #8b5cf6, #3b82f6);
    display: flex;
    align-items: center;
    justify-content: center;
}

.content-wrapper {
    flex-grow: 1;
    animation: fadeUp 0.4s ease-out;
}

/* Mobile Responsive Sidebar */
.mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    margin-right: 16px;
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 999;
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        position: fixed;
        left: -300px;
        top: 0;
        bottom: 0;
        z-index: 1000;
        transition: left 0.3s ease;
        margin: 0;
        border-radius: 0;
        height: 100vh;
        width: 260px;
    }
    
    .sidebar.active {
        left: 0;
    }

    .main-content {
        padding: 16px;
        width: 100%;
    }
    
    .mobile-toggle {
        display: block;
    }

    .overlay.active {
        display: block;
    }
}