:root {
    --primary: #0066cc;
    --primary-hover: #0056b3;
    --secondary: #f5f5f7;
    --secondary-hover: #e8e8ed;
    --text-main: #1d1d1f;
    --text-muted: #86868b;
    --bg-main: #fbfbfd;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --danger: #ff3b30;
    --danger-hover: #e0352b;
    --success: #34c759;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg-main) url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiPjxkZWZzPjxsaW5lYXJHcmFkaWVudCBpZD0iZyIgeDE9IjAlIiB5MT0iMCUiIHgyPSIxMDAlIiB5Mj0iMTAwJSI+PHN0b3Agb2Zmc2V0PSIwJSIgc3RvcC1jb2xvcj0iI2YwZjRmOCIvPjxzdG9wIG9mZnNldD0iMTAwJSIgc3RvcC1jb2xvcj0iI2U2ZWNmNSIvPjwvbGluZWFyR3JhZGllbnQ+PC9kZWZzPjxyZWN0IHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbGw9InVybCgjZykiLz48L3N2Zz4=');
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

header {
    width: 100%;
    padding: 1rem 2rem;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
}

main {
    width: 100%;
    max-width: 1200px;
    padding: 2rem;
    box-sizing: border-box;
}

.filter-bar {
    display: flex;
    gap: 1rem;
    background: white;
    padding: 1rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    margin-bottom: 2rem;
    align-items: center;
}

.modern-select {
    padding: 0.6rem 2.5rem 0.6rem 1rem;
    border: 1px solid #d2d2d7;
    border-radius: 8px;
    font-size: 0.95rem;
    background-color: white;
    appearance: none;
    outline: none;
    transition: all 0.2s;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.7rem center;
    background-size: 1em;
}

.modern-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}

.table-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    overflow: hidden;
}

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

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

th {
    background: #fbfbfd;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tr:hover {
    background: #f9f9fb;
    cursor: pointer;
}

.badge {
    padding: 0.3rem 0.6rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-success { background: rgba(52,199,89,0.1); color: var(--success); }
.badge-danger { background: rgba(255,59,48,0.1); color: var(--danger); }
.badge-neutral { background: #f0f4f8; color: var(--text-muted); }

/* Slide out panel */
.side-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: white;
    box-shadow: -5px 0 25px rgba(0,0,0,0.1);
    transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.side-panel.open {
    right: 0;
}

.panel-header {
    padding: 1.5rem;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.panel-footer {
    padding: 1.5rem;
    border-top: 1px solid #f0f0f0;
    background: #fbfbfd;
}

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }

.btn-icon {
    background: none;
    color: var(--text-muted);
    padding: 0.5rem;
    border-radius: 8px;
}
.btn-icon:hover { background: var(--secondary-hover); color: var(--text-main); }

.toast-container { position: fixed; bottom: 20px; left: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 10px; }
.toast { background: white; color: var(--text-main); padding: 12px 20px; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.1); display: flex; align-items: center; gap: 10px; font-weight: 500; font-size: 0.9rem; transform: translateX(-120%); animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
@keyframes slideIn { to { transform: translateX(0); } }

.assignment-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    padding: 10px;
    background: #f9f9fb;
    border-radius: 8px;
    border: 1px solid #f0f0f0;
}

.input-number {
    width: 70px;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 6px;
    text-align: right;
}

.progress-container {
    width: 100%;
    height: 8px;
    background: #f0f0f0;
    border-radius: 4px;
    margin-top: 10px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.3s, background 0.3s;
}

.hidden { display: none !important; }