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

:root {
  /* Default: Modern Neutral Graphite / Android Material Dark */
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --surface-bg: #1e1e1e;
  --surface-hover: #292929;
  --border-color: #2e2e2e;
  --accent-primary: #e0e0e0;
  --accent-secondary: #a0a0a0;
  --btn-primary-bg: #e0e0e0;
  --btn-primary-text: #121212;
  --btn-secondary-bg: #292929;
  --btn-secondary-text: #e0e0e0;
  --text-main: #f5f5f5;
  --text-muted: #8e8e8e;
  --success: #10b981;
  --danger: #ef4444;
  --card-radius: 14px;
}

[data-theme="light"] {
  /* Modern Clean White / Android Material Light */
  --bg-primary: #f5f5f5;
  --bg-secondary: #ffffff;
  --surface-bg: #ffffff;
  --surface-hover: #f0f0f0;
  --border-color: #e2e8f0;
  --accent-primary: #1e293b;
  --accent-secondary: #475569;
  --btn-primary-bg: #1e293b;
  --btn-primary-text: #ffffff;
  --btn-secondary-bg: #f1f5f9;
  --btn-secondary-text: #1e293b;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --card-radius: 14px;
}

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

body {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Minimalist Android Material Top App Bar */
header {
  height: 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 32px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: -0.3px;
  text-decoration: none;
}

.logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Main Container */
main {
  max-width: 1100px;
  width: 100%;
  margin: 32px auto;
  padding: 0 20px;
  flex: 1;
}

/* Flat Minimal Cards */
.flat-card {
  background: var(--surface-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 32px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Login Card */
.auth-container {
  max-width: 440px;
  margin: 48px auto;
}

.auth-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
  text-align: center;
}

.auth-subtitle {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 24px;
  text-align: center;
  line-height: 1.5;
}

/* Form Inputs */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-muted);
}

input[type="email"],
input[type="text"] {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 15px;
  color: var(--text-main);
  outline: none;
  font-family: inherit;
  transition: border-color 0.2s ease;
}

input[type="email"]:focus,
input[type="text"]:focus {
  border-color: var(--text-muted);
}

.otp-input {
  letter-spacing: 6px;
  font-size: 22px !important;
  text-align: center;
  font-family: 'JetBrains Mono', monospace !important;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  width: 100%;
  font-family: inherit;
}

.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.9;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border: 1px solid var(--border-color);
  width: auto;
}

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

/* Dashboard Header */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

/* Devices Grid */
.devices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.device-card {
  background: var(--surface-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.device-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.device-title {
  font-size: 18px;
  font-weight: 600;
}

.device-id {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 99px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--success);
}

/* Modal Overlay (Downloads & Remote Canvas) */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--surface-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  width: 90%;
  max-width: 520px;
  padding: 28px;
  position: relative;
}

/* Spinner */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(128, 128, 128, 0.3);
  border-radius: 50%;
  border-top-color: currentColor;
  animation: spin 0.75s linear infinite;
  vertical-align: middle;
}

.hidden {
  display: none !important;
}

/* ====================================================
   RESPONSIVE MOBILE / FLAT MINIMALIST SYSTEM
   ==================================================== */
@media (max-width: 768px) {
  header {
    height: 56px;
    padding: 0 16px;
  }

  .logo {
    font-size: 18px;
  }

  .logo-icon {
    width: 24px;
    height: 24px;
    font-size: 13px;
  }

  main {
    margin: 16px auto;
    padding: 0 14px;
  }

  .flat-card {
    padding: 22px 16px;
  }

  .auth-container {
    margin: 20px auto;
  }

  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .devices-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}