/* =============================================
   ENRG Protocol — Design System
   ============================================= */

/* --- Tokens --- */
:root {
  --color-bg:          #0a0e17;
  --color-bg-2:        #111827;
  --color-bg-card:     #151d2e;
  --color-border:      #1f2d45;
  --color-primary:     #00d4aa;
  --color-primary-dim: #00d4aa22;
  --color-accent:      #7c5cfc;
  --color-text:        #e2e8f0;
  --color-muted:       #8899aa;
  --color-error:       #f87171;
  --color-success:     #34d399;
  --color-warning:     #fbbf24;

  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  32px;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(0, 212, 170, 0.15);

  --transition: 0.2s ease;
  --max-width: 1200px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--color-primary); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.8; }
img { display: block; max-width: 100%; }
input, select, button { font-family: inherit; font-size: 1rem; }

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn--primary {
  background: var(--color-primary);
  color: #0a0e17;
}
.btn--primary:hover { background: #00bfa0; }
.btn--outline {
  background: transparent;
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
}
.btn--outline:hover { background: var(--color-primary-dim); }
.btn--ghost {
  background: transparent;
  color: var(--color-muted);
}
.btn--ghost:hover { color: var(--color-text); }
.btn--sm { padding: 6px 14px; font-size: 0.85rem; }
.btn--full { width: 100%; }

/* --- Navbar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 64px;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
}
.navbar__links {
  display: flex;
  gap: 28px;
}
.navbar__links a {
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 500;
}
.navbar__links a:hover { color: var(--color-text); }
.navbar__right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.navbar__address {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-muted);
}
#wallet-btn.connected {
  background: var(--color-primary-dim);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* --- Hero --- */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: calc(100vh - 64px);
  padding: 80px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 40px;
}
.hero__content { max-width: 580px; }
.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__subtitle {
  font-size: 1.15rem;
  color: var(--color-muted);
  margin-bottom: 36px;
  max-width: 480px;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__visual {
  position: relative;
  width: 420px;
  height: 420px;
  flex-shrink: 0;
}
.hero__orb {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%,
    rgba(0, 212, 170, 0.2) 0%,
    rgba(124, 92, 252, 0.15) 50%,
    transparent 70%);
  animation: pulse 6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50%       { transform: scale(1.05); opacity: 1; }
}

/* --- Stats --- */
.stats { padding: 40px 0; border-top: 1px solid var(--color-border); }
.stats .container {
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
}
.stat {
  text-align: center;
  min-width: 160px;
}
.stat__label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.stat__value {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
}
.stat--skeleton {
  height: 60px;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  width: 160px;
  animation: shimmer 1.5s infinite;
}

/* --- Section --- */
.section { padding: 80px 0; }
.section--dark { background: var(--color-bg-2); }
.section__title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 48px;
  text-align: center;
}

/* --- Steps --- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
}
.step {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.step:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}
.step__icon {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--color-primary);
  margin-bottom: 16px;
}
.step h3 { font-size: 1.1rem; margin-bottom: 8px; }
.step p  { color: var(--color-muted); font-size: 0.9rem; }

/* --- Token Info --- */
.token-info {
  display: flex;
  gap: 60px;
  align-items: center;
  flex-wrap: wrap;
}
.token-info__text { flex: 1; min-width: 280px; }
.token-info__text h2 { font-size: 2rem; margin-bottom: 16px; }
.token-info__text p  { color: var(--color-muted); margin-bottom: 24px; }
.token-info__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  min-width: 280px;
}
.token-stat {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}
.token-stat__label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.token-stat__value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
}

/* --- Footer --- */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer__brand { color: var(--color-muted); font-size: 0.9rem; }
.footer__links { display: flex; gap: 24px; }
.footer__links a { color: var(--color-muted); font-size: 0.9rem; }

/* --- Dashboard --- */
.page--dashboard { min-height: 100vh; }
.dashboard__summary { background: var(--color-bg-2); padding: 32px 0; }
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}
.summary-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}
.summary-card__label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.summary-card__value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-primary);
}
.dashboard__section { padding: 48px 0; }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.section-header h2 { font-size: 1.4rem; }

/* --- Device Cards --- */
.devices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.device-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color var(--transition);
}
.device-card:hover { border-color: var(--color-primary); }
.device-card__name { font-weight: 700; font-size: 1rem; }
.device-card__type { font-size: 0.85rem; color: var(--color-muted); }
.device-card__status {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  align-self: flex-start;
}
.device-card__status--active  { background: rgba(52,211,153,0.15); color: var(--color-success); }
.device-card__status--pending { background: rgba(251,191,36,0.15);  color: var(--color-warning); }
.device-card__status--inactive{ background: rgba(248,113,113,0.15); color: var(--color-error);   }
.device-card__energy { font-size: 0.9rem; color: var(--color-muted); margin-top: 4px; }
.device-card .mint-btn { margin-top: auto; }

/* --- History Table --- */
.history-wrapper { overflow-x: auto; }
.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.history-table th,
.history-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.history-table th {
  color: var(--color-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.history-table td a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.history-table tbody tr:hover { background: var(--color-bg-card); }

/* --- Register Page --- */
.page--register {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.register-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
}
.register-step { display: none; width: 100%; max-width: 480px; }
.register-step.active { display: block; }
.register-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-card);
}
.register-card h1 { font-size: 1.8rem; margin-bottom: 8px; }
.register-card__sub { color: var(--color-muted); margin-bottom: 32px; font-size: 0.95rem; }

/* --- Forms --- */
.form { display: flex; flex-direction: column; gap: 20px; }
.form__group { display: flex; flex-direction: column; gap: 6px; }
.form__group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
}
.form__group input,
.form__group select {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  color: var(--color-text);
  transition: border-color var(--transition);
}
.form__group input:focus,
.form__group select:focus {
  outline: none;
  border-color: var(--color-primary);
}
.form__group input::placeholder { color: var(--color-muted); }
.form__group select option { background: var(--color-bg-2); }

/* --- Toast --- */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 9999;
  animation: slideUp 0.3s ease;
  max-width: 360px;
  box-shadow: var(--shadow-card);
}
.toast--success { background: rgba(52,211,153,0.15); border: 1px solid var(--color-success); color: var(--color-success); }
.toast--error   { background: rgba(248,113,113,0.15); border: 1px solid var(--color-error);   color: var(--color-error);   }
.toast--info    { background: rgba(0,212,170,0.1);    border: 1px solid var(--color-primary);  color: var(--color-primary); }

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

/* --- Utility --- */
.error-message { color: var(--color-error);   font-size: 0.9rem; }
.empty-message  { color: var(--color-muted);   font-size: 0.9rem; }

@keyframes shimmer {
  0%   { opacity: 0.4; }
  50%  { opacity: 0.7; }
  100% { opacity: 0.4; }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding: 60px 24px;
    min-height: auto;
  }
  .hero__visual { display: none; }
  .hero__actions { justify-content: center; }
  .navbar__links { display: none; }
  .token-info { flex-direction: column; }
  .register-card { padding: 28px 20px; }
}