:root {
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --sidebar-bg: #1e293b;
    --accent: #f59e0b;
    /* Construction Amber */
    --accent-hover: #d97706;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --glass-blur: blur(12px);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow: hidden;
    height: 100vh;
}

/* Screens */
.screen {
    display: none;
    height: 100vh;
}

.screen.active {
    display: flex;
}

/* Login - Premium Glassmorphism */
#login-screen {
    background: radial-gradient(circle at top left, #1e293b, #0f172a);
    justify-content: center;
    align-items: center;
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    text-align: center;
}

.brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.brand i {
    width: 32px;
    height: 32px;
    color: var(--accent);
}

.brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.brand h1 span {
    color: var(--accent);
}

.login-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 32px;
}

.input-group {
    text-align: left;
    margin-bottom: 24px;
}

.input-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    padding: 14px 16px;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    transition: var(--transition);
}

.input-group select option {
    background: var(--bg-dark);
    color: white;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.1);
}

.btn-primary {
    width: 100%;
    background: var(--accent);
    color: #000;
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(245, 158, 11, 0.3);
}

.login-footer {
    margin-top: 32px;
    font-size: 0.75rem !important;
}

/* Dashboard Layout */
#app-screen {
    display: flex;
}

.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 24px;
}

.sidebar-header {
    margin-bottom: 40px;
}

.sidebar-nav {
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 12px;
    margin-bottom: 8px;
    transition: var(--transition);
    font-weight: 500;
}

.nav-item i {
    width: 20px;
    height: 20px;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.nav-item.active {
    background: var(--accent);
    color: #000;
}

.sidebar-footer {
    border-top: 1px solid var(--border);
    padding-top: 24px;
}

#logout-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    background: transparent;
    border: none;
    color: #ef4444;
    padding: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

#logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    border-radius: 12px;
}

/* Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.top-bar {
    padding: 24px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: var(--glass-blur);
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid var(--border);
}

.top-bar h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

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

.avatar {
    width: 36px;
    height: 36px;
    background: var(--accent);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

#content-area {
    padding: 40px;
}

/* Dashboard Widgets */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--sidebar-bg);
    padding: 24px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.stat-header i {
    color: var(--accent);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Tables & Lists */
.card {
    background: var(--sidebar-bg);
    border-radius: 20px;
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 24px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

td {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

.status-pill {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: default;
}

.status-available {
    background: rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

.status-rented {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

.status-maintenance {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.status-defective {
    background: rgba(239, 68, 68, 0.3);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.5);
}

.status-maintenance-due {
    background: rgba(245, 158, 11, 0.2);
    color: #f59e0b;
}

.status-badge-clickable {
    cursor: pointer !important;
    transition: var(--transition);
}

.status-badge-clickable:hover {
    filter: brightness(1.2);
    transform: translateY(-1px);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .sidebar {
        width: 80px;
        padding: 16px;
    }

    .sidebar span,
    .sidebar .brand span {
        display: none;
    }

    .nav-item {
        justify-content: center;
    }
}

/* Animations Orbit */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

#content-area>* {
    animation: fadeIn 0.4s ease-out forwards;
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .sidebar,
    .top-bar,
    .nav-item,
    button,
    .sidebar-footer {
        display: none !important;
    }

    #app-screen {
        display: block;
    }

    .main-content {
        overflow: visible;
        display: block;
    }

    #content-area {
        padding: 0;
    }

    .card {
        border: 1px solid #ccc;
        background: white;
        box-shadow: none;
        color: black;
    }

    th,
    td {
        color: black;
        border-bottom: 1px solid #eee;
    }

    .status-pill {
        border: 1px solid #000;
        background: transparent;
        color: black;
    }

    /* Simulate a rental slip header for print */
    #content-area::before {
        content: "MIETSCHEIN - MachineryFlow Intern";
        display: block;
        font-size: 24px;
        font-weight: bold;
        margin-bottom: 20px;
        text-align: center;
        border-bottom: 2px solid black;
        padding-bottom: 10px;
    }
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    transition: var(--transition);
}

.btn-icon:hover {
    color: var(--accent);
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-overlay.active {
    display: flex;
}

.modal-card {
    background: var(--sidebar-bg);
    border: 1px solid var(--border);
    padding: 32px;
    border-radius: 20px;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 50px 100px -20px rgba(0, 0, 0, 0.5);
    animation: modalIn 0.3s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

@keyframes modalIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-form .input-group {
    margin-bottom: 16px;
}

.modal-form .btn-primary {
    margin-top: 10px;
}