/* ============================================================
   BASE STYLES — SmartHome Dashboard
   Reset, typography, global elements
   ============================================================ */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100dvh;
  overflow-x: hidden;
  position: relative;
}

/* Ambient background gradient */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(255, 107, 53, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(79, 195, 247, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(171, 71, 188, 0.03) 0%, transparent 60%);
  z-index: -1;
  pointer-events: none;
  animation: ambientShift 20s ease-in-out infinite alternate;
}

@keyframes ambientShift {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-5%, -3%) rotate(3deg); }
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p { color: var(--text-secondary); }

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

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

/* ── Lists ── */
ul, ol { list-style: none; }

/* ── Images ── */
img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ── Buttons ── */
button {
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  color: inherit;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

/* ── Inputs ── */
input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* ── Selection ── */
::selection {
  background: var(--accent-orange);
  color: var(--text-inverse);
}

/* ── Focus visible ── */
:focus-visible {
  outline: 2px solid var(--accent-orange);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Utility classes ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.text-gradient {
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-accent { color: var(--accent-orange); }

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}