/**
 * Lippi Hive AI — Main Stylesheet
 * Layout structure mirrors LippiStage: header → sidebar → main content
 */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700&display=swap');

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

body {
    font-family: 'Nunito', system-ui, -apple-system, sans-serif;
    background: var(--app-bg);
    color: var(--text-dark);
    line-height: 1.6;
}

/* --- Header --- */
.app-header {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--header-height);
    background: var(--bg-deep-dark);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-soft);
}

.app-header .logo { color: var(--text-light); font-weight: 700; font-size: var(--font-size-xl); }
.app-header .logo span { color: var(--accent-orange); }
.app-header nav { display: flex; gap: var(--spacing-md); align-items: center; }
.app-header nav a { color: var(--bg-light); text-decoration: none; font-size: var(--font-size-sm); }
.app-header nav a:hover { color: var(--text-light); }

/* --- Sidebar --- */
.app-sidebar {
    position: fixed; top: var(--header-height); left: 0; bottom: 0;
    width: var(--sidebar-width);
    background: var(--panel-bg);
    border-right: 1px solid #e5e7eb;
    padding: var(--spacing-lg) 0;
    overflow-y: auto;
}

.app-sidebar a {
    display: flex; align-items: center; gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--text-dark); text-decoration: none; font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
}

.app-sidebar a:hover { background: var(--app-bg); }
.app-sidebar a.active { background: var(--bg-light); color: var(--bg-deep-dark); font-weight: 600; border-right: 3px solid var(--accent-orange); }

/* --- Main Content --- */
.app-main {
    margin-top: var(--header-height);
    margin-left: var(--sidebar-width);
    padding: var(--spacing-xl);
    min-height: calc(100vh - var(--header-height));
}

/* --- Cards/Panels --- */
.panel {
    background: var(--panel-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.panel-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid #e5e7eb;
}

.panel-header h2 { font-size: var(--font-size-lg); font-weight: 700; }

/* --- KPI Grid --- */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--spacing-md); }
.kpi-card { text-align: center; padding: var(--spacing-lg); }
.kpi-value { font-size: var(--font-size-2xl); font-weight: 700; color: var(--bg-deep-dark); }
.kpi-label { font-size: var(--font-size-sm); color: var(--text-muted); margin-top: var(--spacing-xs); }
.kpi-delta.positive { color: var(--kpi-positive); }
.kpi-delta.negative { color: var(--kpi-negative); }

/* --- Buttons --- */
.btn {
    display: inline-flex; align-items: center; gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-sm); border: none;
    font-family: inherit; font-weight: 600; font-size: var(--font-size-sm);
    cursor: pointer; transition: all var(--transition-fast);
}

.btn-primary { background: var(--accent-orange); color: var(--text-light); }
.btn-primary:hover { background: #e07600; }
.btn-secondary { background: var(--bg-medium); color: var(--text-light); }
.btn-secondary:hover { background: #1a8da8; }
.btn-outline { background: transparent; border: 1px solid var(--bg-medium); color: var(--bg-medium); }

/* --- Forms --- */
.form-group { margin-bottom: var(--spacing-md); }
.form-group label { display: block; margin-bottom: var(--spacing-xs); font-weight: 600; font-size: var(--font-size-sm); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid #d1d5db; border-radius: var(--border-radius-sm);
    font-family: inherit; font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--bg-medium); box-shadow: 0 0 0 3px rgba(33, 158, 188, 0.15);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .app-sidebar { display: none; }
    .app-main { margin-left: 0; }
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}