frontend/src/index.css

/* PortIQ Premium Design System & Stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;600;700&display=swap');

:root {
  /* Dark Mode Variables */
  --bg-app: radial-gradient(circle at top, #0f1c30 0%, #060913 100%);
  --bg-card: rgba(13, 22, 38, 0.6);
  --border-color: rgba(6, 182, 212, 0.15);
  --border-hover: rgba(6, 182, 212, 0.35);
  
  --color-primary: #06b6d4;      /* Cyan */
  --color-primary-rgb: 6, 182, 212;
  --color-success: #10b981;      /* Emerald */
  --color-danger: #f43f5e;       /* Rose */
  --color-warning: #f59e0b;      /* Amber */
  --color-info: #3b82f6;         /* Blue */
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;
  
  --shadow-premium: 0 12px 40px -10px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
  --shadow-neon: 0 0 20px rgba(6, 182, 212, 0.25);
  --glass-blur: blur(12px);
  --font-sans: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  /* Light Mode Variables */
  --bg-app: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  --bg-card: rgba(255, 255, 255, 0.8);
  --border-color: rgba(6, 182, 212, 0.2);
  --border-hover: rgba(6, 182, 212, 0.5);
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-inverse: #f8fafc;
  
  --shadow-premium: 0 10px 25px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(6, 182, 212, 0.1);
  --shadow-neon: 0 0 15px rgba(6, 182, 212, 0.15);
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-app);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
  transition: background 0.5s ease, color 0.3s ease;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.1);
}
::-webkit-scrollbar-thumb {
  background: rgba(6, 182, 212, 0.25);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(6, 182, 212, 0.45);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

@keyframes slideInRight {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse-ring {
  0%   { transform: scale(0.85); opacity: 0.8; }
  70%  { transform: scale(1.25); opacity: 0; }
  100% { transform: scale(0.85); opacity: 0; }
}

@keyframes bounce-dot {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40%            { transform: scale(1.2); opacity: 1; }
}


/* Utility Layouts */
.animate-fade-in {
  animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.premium-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-premium);
  transition: var(--transition-smooth);
}

.premium-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-premium), 0 4px 20px rgba(6, 182, 212, 0.05);
}

/* Buttons */
.btn-base {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 10px 18px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: rgba(6, 182, 212, 0.08);
  border-color: var(--border-color);
  color: var(--color-primary);
}

.btn-secondary:hover {
  background: rgba(6, 182, 212, 0.16);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: var(--color-danger);
}

.btn-danger:hover {
  background: var(--color-danger);
  color: #fff;
  box-shadow: 0 4px 12px rgba(244, 63, 94, 0.3);
  transform: translateY(-1px);
}

/* Inputs */
.input-base {
  width: 100%;
  padding: 12px 16px;
  background: rgba(15, 23, 42, 0.45);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-smooth);
}

.input-base:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.15);
}

/* Tables */
.table-container {
  width: 100%;
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.custom-table th {
  background: rgba(6, 182, 212, 0.06);
  color: var(--color-primary);
  font-weight: 700;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.custom-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  transition: var(--transition-smooth);
}

.custom-table tr:last-child td {
  border-bottom: none;
}

.custom-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Tabs */
.tab-bar {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 16px;
  cursor: pointer;
  position: relative;
  transition: var(--transition-smooth);
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  color: var(--color-primary);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  box-shadow: var(--shadow-neon);
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(3, 7, 18, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.25s ease-out;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  width: min(650px, 92vw);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
  font-size: 1.2rem;
}

.modal-close-btn:hover {
  color: var(--color-primary);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}