/* ═══════════════════════════════════════════════════════════════════════
   Reddit Profile Graph — Stylesheet
   Dark theme · Glassmorphism · Premium aesthetic
   ═══════════════════════════════════════════════════════════════════════ */

/* ── Reset & Variables ─────────────────────────────────────────────── */

:root {
  --bg:          #0f0f10;
  --bg-card:     rgba(26, 26, 27, 0.85);
  --bg-card-alt: rgba(36, 36, 38, 0.7);
  --surface:     #1a1a1b;
  --border:      rgba(255, 255, 255, 0.08);
  --border-lit:  rgba(255, 255, 255, 0.15);

  --text:        #e8e8ea;
  --text-dim:    #8a8a8e;
  --text-muted:  #555558;

  --accent:      #FF4500;
  --accent-glow: rgba(255, 69, 0, 0.35);
  --accent-soft: rgba(255, 69, 0, 0.12);

  --radius:      14px;
  --radius-sm:   8px;
  --font:        'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

[hidden] {
  display: none !important;
}

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Landing Screen ────────────────────────────────────────────────── */

.landing {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.landing.fade-out {
  opacity: 0;
  transform: scale(1.05);
  pointer-events: none;
}

.landing-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 50% 40%, var(--accent-glow), transparent),
    radial-gradient(ellipse 800px 600px at 30% 60%, rgba(79, 195, 247, 0.08), transparent),
    radial-gradient(ellipse 800px 600px at 70% 30%, rgba(126, 87, 194, 0.06), transparent),
    var(--bg);
  z-index: -1;
}

.landing-card {
  text-align: center;
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  max-width: 420px;
  width: 90%;
  animation: cardIn 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(30px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.logo {
  margin-bottom: 20px;
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(1.06); opacity: 0.85; }
}

.landing-card h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 40px;
  color: #ffffff;
}

.subtitle {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 32px;
  font-weight: 400;
}

/* ── Input Group ───────────────────────────────────────────────────── */

.input-group {
  display: flex;
  align-items: center;
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 40px;
  padding: 6px 6px 6px 20px;
  transition: border-color 0.3s, box-shadow 0.3s;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.input-group:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), 0 4px 20px rgba(0,0,0,0.5);
}

.input-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
}

.input-prefix {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 16px;
  margin-right: 4px;
  user-select: none;
}

.input-wrapper input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: #ffffff;
  font-size: 16px;
  font-family: var(--font);
  font-weight: 400;
  padding: 10px 0;
}

.input-wrapper input::placeholder {
  color: var(--text-muted);
}

#submitBtn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
  flex-shrink: 0;
  margin-left: 10px;
}

#submitBtn:hover {
  background: #ff5722;
  transform: scale(1.05);
}

#submitBtn:active {
  transform: scale(0.95);
}

#submitBtn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-arrow {
  font-size: 18px;
  font-weight: bold;
}

/* ── Error ─────────────────────────────────────────────────────────── */

.error-msg {
  margin-top: 16px;
  padding: 10px 14px;
  background: rgba(255, 82, 82, 0.12);
  border: 1px solid rgba(255, 82, 82, 0.25);
  border-radius: var(--radius-sm);
  color: #ff8a80;
  font-size: 13px;
  font-weight: 500;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25%      { transform: translateX(-6px); }
  75%      { transform: translateX(6px); }
}



/* ── Loading Overlay ───────────────────────────────────────────────── */

.loading {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 15, 16, 0.92);
  backdrop-filter: blur(8px);
  z-index: 200;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.loading-card {
  text-align: center;
  padding: 40px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 24px;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.loading-status {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 20px;
  min-height: 18px;
}

.progress-bar {
  width: 240px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  margin: 0 auto;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #ff7043);
  border-radius: 2px;
  transition: width 0.4s ease;
}

/* ── Graph Screen ──────────────────────────────────────────────────── */

.graph-screen {
  position: fixed;
  inset: 0;
  background: var(--surface);
  z-index: 50;
  animation: fadeIn 0.4s ease;
}

.graph-container {
  width: 100%;
  height: 100%;
}

/* ── Stats Bar ─────────────────────────────────────────────────────── */

.stats-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 10px 20px;
  background: rgba(15, 15, 16, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  z-index: 60;
}

.stat {
  color: var(--text);
}

.stat-sep {
  color: var(--text-muted);
  font-weight: 400;
}

/* ── Legend ─────────────────────────────────────────────────────────── */

.legend {
  position: fixed;
  bottom: 20px;
  left: 20px;
  background: rgba(15, 15, 16, 0.88);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-lit);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 13px;
  line-height: 1.9;
  z-index: 60;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.legend-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-weight: 500;
}

.legend-icon {
  font-size: 14px;
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}

.legend-hint {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.6;
}

/* ── Back Button ───────────────────────────────────────────────────── */

.back-btn {
  position: fixed;
  top: 52px;
  left: 16px;
  padding: 8px 16px;
  background: rgba(15, 15, 16, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  z-index: 60;
  transition: color 0.2s, border-color 0.2s;
}

.back-btn:hover {
  color: var(--text);
  border-color: var(--border-lit);
}

/* ── Responsive ────────────────────────────────────────────────────── */

@media (max-width: 520px) {
  .landing-card {
    padding: 32px 24px 28px;
  }

  .landing-card h1 {
    font-size: 22px;
  }

  .input-group {
    padding: 4px 4px 4px 16px;
  }

  .stats-bar {
    font-size: 11px;
    gap: 8px;
    padding: 8px 12px;
  }

  .legend {
    bottom: 12px;
    left: 12px;
    padding: 12px 16px;
    font-size: 12px;
  }
}