/*
 * NetHighTech - Ultra Premium UI/UX Theme (Enterprise Grade)
 * File: app/static/style.css
 */

/* -------------------------
 * :Root & Variables (Modern Zinc/Slate Palette)
 * ------------------------- */
:root {
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-mono: "Fira Code", ui-monospace, Menlo, Monaco, Consolas, monospace;

  /* Deep, sophisticated dark mode backgrounds */
  --color-bg: #09090b;          /* Zinc 950 - Main Body */
  --color-bg-nav: #09090b;      /* Sidebar & Topbar */
  --color-bg-light: #18181b;    /* Zinc 900 - Cards & Surfaces */
  --color-bg-lighter: #27272a;  /* Zinc 800 - Hovers & Inputs */

  /* Borders and Dividers */
  --color-border: #27272a;      /* Zinc 800 */
  --color-border-hover: #3f3f46;/* Zinc 700 */

  /* Typography */
  --color-text: #f4f4f5;        /* Zinc 50 */
  --color-text-nav: #d4d4d8;    /* Zinc 300 */
  --color-text-muted: #a1a1aa;  /* Zinc 400 */

  /* Brand Colors */
  --color-primary: #3b82f6;     /* Blue 500 */
  --color-primary-dark: #2563eb;/* Blue 600 */
  --color-primary-text: #ffffff;
  
  /* Status Colors */
  --color-success: #10b981;     /* Emerald 500 */
  --color-warning: #f59e0b;     /* Amber 500 */
  --color-danger: #ef4444;      /* Red 500 */

  /* Structural */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Premium Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.5);
  
  /* Glow/Focus Effects */
  --focus-ring: 0 0 0 2px rgba(59, 130, 246, 0.3);
}

/* -------------------------
 * Custom Scrollbar (Webkit)
 * ------------------------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* -------------------------
 * Base & Reset
 * ------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

body { margin: 0; padding: 0; }

a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: #60a5fa; text-decoration: none; }

/* -------------------------
 * Layout (App Shell)
 * ------------------------- */
.app-shell { display: flex; height: 100vh; overflow: hidden; }

/* Sidebar */
.app-sidebar {
  width: 280px;
  background-color: var(--color-bg-nav);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1rem;
  overflow-y: auto;
  transition: width 0.2s ease;
  z-index: 10;
}

.sidebar-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text);
  padding: 0.5rem;
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar-nav { display: flex; flex-direction: column; gap: 0.5rem; flex-grow: 1; }

/* Accordion Nav Groups */
.nav-group { margin-bottom: 0.5rem; }

.nav-group-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.75rem 0.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  user-select: none;
}

.nav-group-title:hover {
  color: var(--color-text);
  background-color: rgba(255, 255, 255, 0.03);
}

.nav-group-links {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding-top: 0.25rem;
}

.nav-group.open .nav-group-links { display: flex; }

/* THE CHEVRON FIX - MUCH LARGER AND CLEARER */
.chevron {
  width: 20px;
  height: 20px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: inherit;
}

.nav-group.open .chevron { transform: rotate(180deg); }

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--color-text-nav);
  font-weight: 500;
  font-size: 0.925rem;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.nav-link:hover {
  background-color: var(--color-bg-light);
  color: var(--color-text);
  border-color: var(--color-border);
}

.nav-link.active {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
  border-color: rgba(59, 130, 246, 0.2);
  font-weight: 600;
}

.nav-link img.nav-icon {
  width: 18px; height: 18px; opacity: 0.7; transition: opacity 0.2s;
  filter: invert(90%) sepia(10%) saturate(150%) hue-rotate(180deg) brightness(100%) contrast(90%);
}
.nav-link:hover img.nav-icon { opacity: 1; }
.nav-link.active img.nav-icon {
  opacity: 1;
  filter: invert(50%) sepia(90%) saturate(300%) hue-rotate(190deg) brightness(100%) contrast(100%);
}

/* Main Content Area */
.app-main { flex: 1; display: flex; flex-direction: column; overflow: hidden; background-color: var(--color-bg); }

/* Top Bar (Glassmorphism effect) */
.app-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  background-color: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 0 2rem;
  flex-shrink: 0;
  z-index: 5;
}

.topbar-actions { display: flex; align-items: center; gap: 1rem; }

.action-link {
  display: flex; align-items: center; gap: 0.75rem; color: var(--color-text-nav);
  padding: 0.4rem 0.75rem; border-radius: var(--radius-md); font-size: 0.9rem;
  border: 1px solid var(--color-border); transition: all 0.2s;
}
.action-link:hover { background-color: var(--color-bg-lighter); color: var(--color-text); }

/* Content */
.app-content { flex: 1; overflow-y: auto; padding: 2.5rem; }

.page-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 2rem; }
.page-header h1 { font-size: 1.875rem; font-weight: 700; margin: 0; letter-spacing: -0.025em; }

/* -------------------------
 * Components
 * ------------------------- */

/* Premium Cards */
.card {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.card:hover { border-color: var(--color-border-hover); box-shadow: var(--shadow-md); }
.card h2, .card h3 { margin-top: 0; font-weight: 600; color: var(--color-text); letter-spacing: -0.015em; }

/* Elegant Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-weight: 500; font-size: 0.9rem; padding: 0.5rem 1rem; border-radius: var(--radius-md);
  cursor: pointer; transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1); border: 1px solid transparent;
  user-select: none; outline: none;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background-color: var(--color-primary); color: #fff;
  box-shadow: 0 1px 2px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.1);
}
.btn-primary:hover { background-color: var(--color-primary-dark); }
.btn-primary:focus-visible { box-shadow: var(--focus-ring); }

.btn-secondary {
  background-color: var(--color-bg-lighter); color: var(--color-text); border-color: var(--color-border);
}
.btn-secondary:hover { background-color: var(--color-border-hover); color: #fff; }

.btn-danger {
  background-color: transparent; color: var(--color-danger); border-color: rgba(239, 68, 68, 0.3);
}
.btn-danger:hover { background-color: var(--color-danger); color: #fff; border-color: var(--color-danger); }

.btn-success {
  background-color: var(--color-success); color: #fff;
}
.btn-success:hover { background-color: #059669; }

.btn-sm { padding: 0.25rem 0.75rem; font-size: 0.8rem; }

/* Forms & Inputs */
label { display: block; font-weight: 500; font-size: 0.875rem; margin-bottom: 0.4rem; margin-top: 1.25rem; color: var(--color-text-nav); }
label:first-child { margin-top: 0; }

input, select, textarea {
  width: 100%; box-sizing: border-box;
  background-color: var(--color-bg); color: var(--color-text);
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: 0.65rem 1rem; font-size: 0.95rem; font-family: var(--font-sans);
  transition: all 0.2s ease; outline: none;
}
input::placeholder, textarea::placeholder { color: var(--color-text-muted); }
input:hover, select:hover, textarea:hover { border-color: var(--color-border-hover); }
input:focus, select:focus, textarea:focus { border-color: var(--color-primary); box-shadow: var(--focus-ring); background-color: #000; }

/* Modern Tables */
.table-container { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; text-align: left; }
th, td { padding: 0.875rem 1.25rem; border-bottom: 1px solid var(--color-border); }
th { background-color: rgba(255, 255, 255, 0.02); font-weight: 600; color: var(--color-text-muted); text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.05em; }
tbody tr { transition: background-color 0.2s; }
tbody tr:hover { background-color: rgba(255, 255, 255, 0.02); }
tbody tr:last-child td { border-bottom: none; }

/* Grid System */
.grid { display: grid; gap: 1.5rem; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* Code Blocks */
.code {
  white-space: pre-wrap; font-family: var(--font-mono); font-size: 0.85rem;
  background: #000; border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: 1.25rem; max-height: 500px; overflow-y: auto; color: #a5b4fc; line-height: 1.5;
}

/* Utilities */
.muted { color: var(--color-text-muted); font-size: 0.9rem; }
.nav-right { display: flex; gap: 0.75rem; align-items: center; }