/* ===== Ergosona – Shared Theme & Base Styles ===== */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap");

/* --- CSS Custom Properties --- */
:root {
  --bg: #0c0c10;
  --bg-alt: #111116;
  --surface: #18181e;
  --surface-alt: #222230;
  --border: #2a2a38;
  --border-hover: #3a3a4d;
  --primary: #6d5cff;
  --primary-light: #8577ff;
  --primary-dark: #5a49e6;
  --primary-muted: rgba(109, 92, 255, 0.12);
  --accent: #a199ff;
  --accent-light: #c4bfff;
  --text: #e4e4ea;
  --text-muted: #8e8ea0;
  --text-dim: #5c5c6f;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --danger-light: #fca5a5;
  --card-bg: #1a1a22;
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 14px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.35);
  --transition: 0.18s ease;
  --font: "Inter", system-ui, -apple-system, sans-serif;
}

/* --- Reset --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-light);
}

img,
video,
canvas {
  display: block;
  max-width: 100%;
}

button {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  outline: none;
  transition: all var(--transition);
}

/* --- Shared Navigation Bar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 56px;
  background: rgba(12, 12, 16, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.navbar-brand svg {
  width: 28px;
  height: 28px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.navbar-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--text);
  background: var(--surface-alt);
}

/* Mobile hamburger toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.navbar.nav-open .nav-toggle span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

.navbar.nav-open .nav-toggle span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 550;
  letter-spacing: 0.01em;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

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

.btn-primary:active {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-secondary {
  background: var(--surface-alt);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
  border-color: var(--border-hover);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}

.btn-danger:hover {
  background: #ef4444;
  border-color: #ef4444;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
  color: var(--text-muted);
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-icon:hover {
  background: var(--border);
  color: var(--text);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--surface);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 14px 36px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

/* --- Cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

/* --- Toggle Switch --- */
.toggle-switch {
  position: relative;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--transition);
}

.toggle-slider::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: all var(--transition);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--primary);
  border-color: var(--primary);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(22px);
  background: #fff;
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Page wrapper (with navbar offset) --- */
.page {
  padding-top: 72px;
  min-height: 100vh;
}

/* --- Utility --- */
.text-center {
  text-align: center;
}
.text-muted {
  color: var(--text-muted);
}
.text-dim {
  color: var(--text-dim);
}
.text-success {
  color: var(--success);
}
.text-warning {
  color: var(--warning);
}
.text-danger {
  color: var(--danger);
}
.text-primary {
  color: var(--primary-light);
}
.mt-1 {
  margin-top: 8px;
}
.mt-2 {
  margin-top: 16px;
}
.mt-3 {
  margin-top: 24px;
}
.mt-4 {
  margin-top: 32px;
}
.mb-1 {
  margin-bottom: 8px;
}
.mb-2 {
  margin-bottom: 16px;
}
.mb-3 {
  margin-bottom: 24px;
}
.mb-4 {
  margin-bottom: 32px;
}
.gap-1 {
  gap: 8px;
}
.gap-2 {
  gap: 16px;
}
.gap-3 {
  gap: 24px;
}
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-between {
  justify-content: space-between;
}
.justify-center {
  justify-content: center;
}
.flex-wrap {
  flex-wrap: wrap;
}
.flex-1 {
  flex: 1;
}
.grid {
  display: grid;
}
.hidden {
  display: none !important;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* --- Animations --- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.4s ease-out both;
}

.animate-slide-up {
  animation: slideUp 0.5s ease-out both;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .navbar-nav {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(12, 12, 16, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 16px;
    gap: 2px;
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
  }

  .navbar.nav-open .navbar-nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .navbar-nav a {
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  .navbar {
    padding: 0 16px;
  }

  .container {
    padding: 0 16px;
  }

  .btn-lg {
    padding: 14px 32px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > .reveal:nth-child(2) {
  transition-delay: 0.08s;
}
.reveal-stagger > .reveal:nth-child(3) {
  transition-delay: 0.16s;
}
.reveal-stagger > .reveal:nth-child(4) {
  transition-delay: 0.24s;
}
.reveal-stagger > .reveal:nth-child(5) {
  transition-delay: 0.32s;
}
.reveal-stagger > .reveal:nth-child(6) {
  transition-delay: 0.4s;
}

/* ── Toast Notifications ── */
.toast-container {
  position: fixed;
  top: 72px;
  right: 16px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  animation: toastSlideIn 0.3s ease-out;
  max-width: 360px;
}

.toast.toast-success {
  border-left: 4px solid #10b981;
}
.toast.toast-warning {
  border-left: 4px solid #f59e0b;
}
.toast.toast-error {
  border-left: 4px solid #ef4444;
}
.toast.toast-info {
  border-left: 4px solid #3b82f6;
}
.toast.toast-achievement {
  border-left: 4px solid var(--primary);
}

.toast.toast-hide {
  animation: toastSlideOut 0.3s ease-in forwards;
}

@keyframes toastSlideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toastSlideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* ── Keyboard shortcuts hint ── */
.shortcuts-hint {
  text-align: center;
  padding: 8px;
  font-size: 0.75rem;
  color: var(--text-dim);
  opacity: 0.7;
}

.shortcuts-hint kbd {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 0.7rem;
}

/* ── Feature icon colors ── */
.feature-icon.blue {
  background: rgba(59, 130, 246, 0.15);
  color: #3b82f6;
}

.feature-icon.pink {
  background: rgba(236, 72, 153, 0.15);
  color: #ec4899;
}

.feature-icon.red {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
}