/* ================================================================
   public/css/symbol-system.css
   Focus Symbol System — Core circular design element
   
   Used for:
   - Logo variations
   - Navigation motifs
   - Loading animations
   - Background watermarks
   - Editorial framing device
   - UI identity elements
   - Motion design system
================================================================ */

/* ──────────────────────────────────────────────────────────────
   SYMBOL SIZING SCALE
   ────────────────────────────────────────────────────────────── */
:root {
  /* Icon/UI sizes */
  --symbol-xs: 24px;
  --symbol-sm: 48px;
  --symbol-md: 96px;
  --symbol-lg: 192px;
  --symbol-xl: 320px;
  --symbol-2xl: 480px;
  --symbol-3xl: 640px;

  /* Stroke variations */
  --symbol-stroke-thin: 0.5px;
  --symbol-stroke-regular: 1px;
  --symbol-stroke-bold: 1.5px;
  --symbol-stroke-heavy: 2px;

  /* Opacity states */
  --symbol-opacity-ghost: 0.15;
  --symbol-opacity-subtle: 0.3;
  --symbol-opacity-normal: 0.6;
  --symbol-opacity-active: 1;

  /* Animation timings */
  --symbol-anim-slow: 3s;
  --symbol-anim-normal: 1.5s;
  --symbol-anim-fast: 0.8s;
}

/* ──────────────────────────────────────────────────────────────
   BASE SYMBOL STYLES
   ────────────────────────────────────────────────────────────– */

.symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.symbol svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ── Size Variants ──────────────────────────────────────────── */
.symbol--xs {
  width: var(--symbol-xs);
  height: var(--symbol-xs);
}
.symbol--sm {
  width: var(--symbol-sm);
  height: var(--symbol-sm);
}
.symbol--md {
  width: var(--symbol-md);
  height: var(--symbol-md);
}
.symbol--lg {
  width: var(--symbol-lg);
  height: var(--symbol-lg);
}
.symbol--xl {
  width: var(--symbol-xl);
  height: var(--symbol-xl);
}
.symbol--2xl {
  width: var(--symbol-2xl);
  height: var(--symbol-2xl);
}
.symbol--3xl {
  width: var(--symbol-3xl);
  height: var(--symbol-3xl);
}

/* ── Color Variants ────────────────────────────────────────── */
.symbol--primary {
  color: var(--color-accent-primary);
}
.symbol--secondary {
  color: var(--color-accent-secondary);
}
.symbol--accent {
  color: var(--color-accent-light);
}
.symbol--muted {
  color: var(--color-border-dark);
}
.symbol--dark {
  color: var(--color-text-primary);
}
.symbol--light {
  color: var(--color-surface-primary);
}

/* ── Opacity Variants ──────────────────────────────────────– */
.symbol--ghost {
  opacity: var(--symbol-opacity-ghost);
}
.symbol--subtle {
  opacity: var(--symbol-opacity-subtle);
}
.symbol--normal {
  opacity: var(--symbol-opacity-normal);
}
.symbol--active {
  opacity: var(--symbol-opacity-active);
}

/* ──────────────────────────────────────────────────────────────
   SINGLE CIRCLE — FOCUS
   ────────────────────────────────────────────────────────────– */

.symbol-focus {
  --focus-radius: calc(50% - var(--symbol-stroke-regular));
  --focus-center-dot: 3px;
}

.symbol-focus svg circle {
  fill: none;
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-regular);
}

.symbol-focus svg .focus-dot {
  fill: currentColor;
}

.symbol-focus svg .focus-ring {
  fill: none;
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-regular);
  opacity: 0.5;
}

/* ──────────────────────────────────────────────────────────────
   TRIPLE CIRCLE — OBSERVATION
   ────────────────────────────────────────────────────────────– */

.symbol-observation svg circle {
  fill: none;
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-regular);
}

/* Circles at different scales */
.symbol-observation svg .obs-outer {
  opacity: 0.3;
}

.symbol-observation svg .obs-middle {
  opacity: 0.5;
}

.symbol-observation svg .obs-inner {
  opacity: 0.8;
}

/* ──────────────────────────────────────────────────────────────
   DIRECTIONAL SYMBOL — NAVIGATION
   ────────────────────────────────────────────────────────────– */

.symbol-direction svg circle {
  fill: none;
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-regular);
  opacity: 0.4;
}

.symbol-direction svg .dir-arrow {
  stroke: currentColor;
  fill: none;
  stroke-width: var(--symbol-stroke-regular);
  stroke-linecap: round;
  stroke-linejoin: round;
}

.symbol-direction svg .dir-dot {
  fill: currentColor;
}

/* ──────────────────────────────────────────────────────────────
   DOCUMENTARY GRID — ARCHIVAL
   ────────────────────────────────────────────────────────────– */

.symbol-grid svg line {
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-thin);
  opacity: 0.5;
}

.symbol-grid svg circle {
  fill: none;
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-thin);
  opacity: 0.3;
}

.symbol-grid svg .grid-marker {
  fill: currentColor;
  opacity: 0.6;
}

/* ──────────────────────────────────────────────────────────────
   SPIRAL SYMBOL — JOURNEY
   ────────────────────────────────────────────────────────────– */

.symbol-spiral svg path {
  fill: none;
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-regular);
  stroke-linecap: round;
}

.symbol-spiral svg circle {
  fill: currentColor;
  opacity: 0.7;
}

/* ──────────────────────────────────────────────────────────────
   HORIZON SYMBOL — CLARITY
   ────────────────────────────────────────────────────────────– */

.symbol-horizon svg line {
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-regular);
  stroke-linecap: round;
}

.symbol-horizon svg circle {
  fill: none;
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-thin);
  opacity: 0.4;
}

/* ──────────────────────────────────────────────────────────────
   CROSS SYMBOL — ORIENTATION
   ────────────────────────────────────────────────────────────– */

.symbol-cross svg line {
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-regular);
  stroke-linecap: round;
}

.symbol-cross svg circle {
  fill: none;
  stroke: currentColor;
  stroke-width: var(--symbol-stroke-thin);
  opacity: 0.3;
}

/* ──────────────────────────────────────────────────────────────
   ANIMATION: ROTATING CIRCLES
   ────────────────────────────────────────────────────────────– */

@keyframes symbol-rotate-cw {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes symbol-rotate-ccw {
  from {
    transform: rotate(360deg);
  }
  to {
    transform: rotate(0deg);
  }
}

.symbol--rotate-cw {
  animation: symbol-rotate-cw var(--symbol-anim-slow) linear infinite;
}

.symbol--rotate-cw-fast {
  animation: symbol-rotate-cw var(--symbol-anim-fast) linear infinite;
}

.symbol--rotate-ccw {
  animation: symbol-rotate-ccw var(--symbol-anim-slow) linear infinite;
}

.symbol--rotate-ccw-fast {
  animation: symbol-rotate-ccw var(--symbol-anim-fast) linear infinite;
}

/* ── Individual element rotations ──────────────────────────── */
.symbol--rotate-cw .obs-outer {
  animation: symbol-rotate-cw var(--symbol-anim-slow) linear infinite;
}

.symbol--rotate-ccw .obs-middle {
  animation: symbol-rotate-ccw var(--symbol-anim-slow) linear infinite;
}

.symbol--rotate-cw .obs-inner {
  animation: symbol-rotate-cw calc(var(--symbol-anim-slow) * 0.6) linear
    infinite;
}

/* ──────────────────────────────────────────────────────────────
   ANIMATION: PULSING
   ────────────────────────────────────────────────────────────– */

@keyframes symbol-pulse {
  0%,
  100% {
    opacity: var(--symbol-opacity-normal);
  }
  50% {
    opacity: var(--symbol-opacity-active);
  }
}

@keyframes symbol-pulse-ring {
  0% {
    stroke-width: var(--symbol-stroke-regular);
    opacity: var(--symbol-opacity-active);
  }
  100% {
    stroke-width: var(--symbol-stroke-thin);
    opacity: var(--symbol-opacity-ghost);
    r: calc(var(--focus-radius) * 1.2);
  }
}

.symbol--pulse {
  animation: symbol-pulse var(--symbol-anim-normal) ease-in-out infinite;
}

.symbol--pulse-ring .focus-ring {
  animation: symbol-pulse-ring var(--symbol-anim-normal) ease-out infinite;
}

/* ──────────────────────────────────────────────────────────────
   ANIMATION: DRAWING
   ────────────────────────────────────────────────────────────– */

@keyframes symbol-draw {
  from {
    stroke-dashoffset: 100%;
  }
  to {
    stroke-dashoffset: 0;
  }
}

.symbol--draw circle,
.symbol--draw path {
  stroke-dasharray: 100%;
  animation: symbol-draw 1.2s ease-in-out forwards;
}

/* Staggered drawing */
.symbol--draw .obs-outer {
  animation-delay: 0s;
}

.symbol--draw .obs-middle {
  animation-delay: 0.15s;
}

.symbol--draw .obs-inner {
  animation-delay: 0.3s;
}

/* ──────────────────────────────────────────────────────────────
   ANIMATION: FADE IN
   ────────────────────────────────────────────────────────────– */

@keyframes symbol-fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: var(--symbol-opacity-active);
  }
}

.symbol--fadein {
  animation: symbol-fadein var(--symbol-anim-normal) ease-out forwards;
}

.symbol--fadein .obs-outer {
  animation-delay: 0.1s;
}

.symbol--fadein .obs-middle {
  animation-delay: 0.2s;
}

.symbol--fadein .obs-inner {
  animation-delay: 0.3s;
}

/* ──────────────────────────────────────────────────────────────
   ANIMATION: HOVER STATES
   ────────────────────────────────────────────────────────────– */

.symbol-focus:hover,
.symbol-observation:hover,
.symbol-direction:hover {
  filter: drop-shadow(0 2px 8px rgba(161, 75, 42, 0.2));
}

.symbol--interactive {
  cursor: pointer;
  transition: all var(--transition-base);
}

.symbol--interactive:hover {
  transform: scale(1.1);
  opacity: var(--symbol-opacity-active);
}

.symbol--interactive:active {
  transform: scale(0.95);
}

/* ──────────────────────────────────────────────────────────────
   RESPONSIVE ADJUSTMENTS
   ────────────────────────────────────────────────────────────– */

@media (prefers-reduced-motion: reduce) {
  .symbol--rotate-cw,
  .symbol--rotate-ccw,
  .symbol--rotate-cw-fast,
  .symbol--rotate-ccw-fast,
  .symbol--pulse,
  .symbol--pulse-ring .focus-ring,
  .symbol--draw circle,
  .symbol--draw path,
  .symbol--fadein,
  .symbol--fadein .obs-outer,
  .symbol--fadein .obs-middle,
  .symbol--fadein .obs-inner {
    animation: none;
  }
}

/* ──────────────────────────────────────────────────────────────
   UTILITY: WATERMARK BACKGROUND
   ────────────────────────────────────────────────────────────– */

.symbol-watermark {
  position: fixed;
  bottom: 3%;
  right: 3%;
  z-index: var(--z-hide);
  pointer-events: none;
  opacity: 0.08;
}

@media (max-width: 768px) {
  .symbol-watermark {
    width: var(--symbol-2xl);
    height: var(--symbol-2xl);
  }
}

/* ──────────────────────────────────────────────────────────────
   LOADING SPINNER (Focus Circle)
   ────────────────────────────────────────────────────────────– */

.symbol-loader {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.symbol-loader .symbol-focus {
  animation: symbol-rotate-cw 2s linear infinite;
}

.symbol-loader .focus-ring {
  animation: symbol-pulse-ring 1.5s ease-out infinite;
}

/* ──────────────────────────────────────────────────────────────
   INLINE USAGE
   ────────────────────────────────────────────────────────────– */

/* For use within text/labels */
.symbol--inline {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  margin: 0 0.25em;
  display: inline-flex;
}

.symbol--badge {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--color-accent-pale);
  color: var(--color-accent-primary);
  font-size: 0.75rem;
  font-weight: 600;
}

/* ──────────────────────────────────────────────────────────────
   DARK MODE ADJUSTMENTS
   ────────────────────────────────────────────────────────────– */

[data-theme="dark"] .symbol--light {
  color: var(--color-text-secondary);
}

[data-theme="dark"] .symbol--dark {
  color: var(--color-text-primary);
}

[data-theme="dark"] .symbol-watermark {
  opacity: 0.04;
}