/* ═══════════════════════════════════════════════════════
   BPM Detector — Stylesheet
   Usa las mismas variables CSS que FrameForge
   ═══════════════════════════════════════════════════════ */

/* ═══ Font Face ═══ */
@font-face {
  font-family: 'Phantomuff';
  src: url('/Assets/font/Phantomuff Difficult Font.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #0a0a0f;
  --bg2: #13131a;
  --bg3: #1a1a24;
  --text: #e8e8f0;
  --text2: #a0a0b8;
  --text3: #70708a;
  --accent: #8b5cf6;
  --accent-hover: #7c3aed;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --border: #2a2a38;
  --radius: 12px;
  --shadow: 0 4px 12px rgba(0,0,0,0.3);
}

/* Light theme */
[data-theme="light"] {
  --bg: #f8f9fa;
  --bg2: #ffffff;
  --bg3: #f1f3f5;
  --text: #1a1a24;
  --text2: #4a4a5e;
  --text3: #70708a;
  --border: #e1e4e8;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  padding-bottom: 60px;
}

/* ═══ Topbar ═══ */
.topbar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.topbar-brand {
  font-family: 'Phantomuff', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-fnf {
  color: var(--accent);
}

.brand-sep {
  color: var(--text3);
  margin: 0 0.3rem;
}

.topbar-actions {
  display: flex;
  gap: 0.75rem;
}

.topbar-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s;
}

.topbar-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.topbar-btn svg {
  width: 18px;
  height: 18px;
}

/* ═══ Header ═══ */
.app-header-block {
  text-align: center;
  padding: 3rem 2rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.app-header-block h1 {
  font-family: 'Phantomuff', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 3rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}

.hl {
  color: var(--accent);
}

.sub {
  color: var(--text2);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.help-text {
  color: var(--text3);
  font-size: 0.95rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ═══ Upload Zone ═══ */
.upload-zone {
  max-width: 600px;
  margin: 2rem auto;
  padding: 3rem;
  background: var(--bg2);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
}

.upload-zone:hover {
  border-color: var(--accent);
  background: var(--bg3);
  transform: translateY(-2px);
}

.upload-zone input[type="file"] {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-icon {
  font-size: 3rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.upload-icon svg {
  width: 64px;
  height: 64px;
}

.upload-label {
  color: var(--text);
  font-size: 1.1rem;
}

.upload-label b {
  display: block;
  margin-bottom: 0.5rem;
}

.upload-hint {
  color: var(--text3);
  font-size: 0.9rem;
}

.upload-status {
  margin-top: 1rem;
  color: var(--success);
  font-weight: 600;
}

/* ═══ Results Section ═══ */
.results-section {
  max-width: 1200px;
  margin: 3rem auto;
  padding: 0 2rem;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.results-header h2 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.8rem;
}

.results-header svg {
  width: 28px;
  height: 28px;
  color: var(--accent);
}

/* ═══ Charts Grid ═══ */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.chart-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.chart-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.2);
}

.chart-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.chart-card-header svg {
  width: 24px;
  height: 24px;
  color: var(--accent);
}

.chart-card-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  word-break: break-all;
}

.bpm-result {
  text-align: center;
  margin: 1.5rem 0;
}

.bpm-value {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.bpm-label {
  color: var(--text3);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.confidence-bar {
  margin: 1.5rem 0;
}

.confidence-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--text2);
}

.confidence-track {
  height: 8px;
  background: var(--bg3);
  border-radius: 4px;
  overflow: hidden;
}

.confidence-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease;
}

.confidence-fill.high {
  background: var(--success);
}

.confidence-fill.medium {
  background: var(--warning);
}

.confidence-fill.low {
  background: var(--error);
}

.chart-stats {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  font-size: 0.9rem;
}

.stat-label {
  color: var(--text3);
}

.stat-value {
  color: var(--text);
  font-weight: 600;
}

.alternative-bpms {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg3);
  border-radius: 8px;
}

.alternative-bpms-title {
  color: var(--text3);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.alternative-bpms-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.alt-bpm-chip {
  padding: 0.25rem 0.75rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--text2);
}

/* ═══ Info Section ═══ */
.info-section {
  max-width: 1200px;
  margin: 4rem auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.info-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.info-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.info-card-header svg {
  width: 24px;
  height: 24px;
}

.info-card-header h3 {
  font-size: 1.2rem;
  color: var(--text);
}

.info-card-body {
  color: var(--text2);
  font-size: 0.95rem;
}

.info-card-body ul {
  margin-left: 1.25rem;
  margin-top: 0.5rem;
}

.info-card-body li {
  margin: 0.5rem 0;
}

.info-card-body code {
  background: var(--bg3);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  color: var(--accent);
}

/* ═══ Buttons ═══ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-s {
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-s:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.btn-p {
  background: var(--accent);
  color: white;
}

.btn-p:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

/* ═══ Footer ═══ */
.app-footer {
  text-align: center;
  padding: 2rem;
  color: var(--text3);
  font-size: 0.9rem;
  margin-top: 4rem;
  border-top: 1px solid var(--border);
}

.app-footer a {
  color: var(--accent);
  text-decoration: none;
}

.app-footer a:hover {
  text-decoration: underline;
}

/* ═══ Responsive ═══ */
@media (max-width: 768px) {
  .topbar {
    padding: 1rem;
  }

  .app-header-block h1 {
    font-size: 2rem;
  }

  .charts-grid {
    grid-template-columns: 1fr;
  }

  .upload-zone {
    padding: 2rem 1rem;
  }

  .info-section {
    grid-template-columns: 1fr;
  }
}


/* ═══ Upload Grid ═══ */
.upload-grid {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 2rem;
}

.upload-section {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.upload-section-title {
  text-align: center;
  margin-bottom: 1.5rem;
}

.format-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: white;
}

.format-badge.codename {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.format-badge.psych {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.upload-slots {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.upload-slot {
  position: relative;
  background: var(--bg3);
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.3s;
}

.upload-slot:hover {
  border-color: var(--accent);
  background: var(--bg);
  transform: translateY(-2px);
}

.upload-slot.has-file {
  border-color: var(--success);
  border-style: solid;
}

.upload-slot input[type="file"] {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-slot-content {
  display: flex;
  align-items: center;
  gap: 1rem;
  pointer-events: none;
}

.upload-slot-content svg {
  width: 36px;
  height: 36px;
  color: var(--accent);
  flex-shrink: 0;
}

.upload-slot.has-file svg {
  color: var(--success);
}

.upload-slot-label {
  flex: 1;
}

.upload-slot-label b {
  display: block;
  color: var(--text);
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.upload-slot-label span {
  display: block;
  color: var(--text3);
  font-size: 0.85rem;
}

.upload-slot-status {
  color: var(--text3);
  font-size: 0.9rem;
  padding: 0.35rem 0.75rem;
  background: var(--bg);
  border-radius: 6px;
}

.upload-slot.has-file .upload-slot-status {
  color: var(--success);
  font-weight: 600;
}

.upload-slot-single {
  min-height: 140px;
}

.btn-analyze {
  width: 100%;
  justify-content: center;
  font-size: 1.05rem;
  padding: 0.75rem 1.5rem;
}

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

/* ═══ Responsive ═══ */
@media (max-width: 1024px) {
  .upload-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .upload-section {
    padding: 1.5rem;
  }

  .upload-slot {
    padding: 1rem;
  }

  .upload-slot-content {
    flex-direction: column;
    text-align: center;
  }

  .upload-slot-status {
    margin-top: 0.5rem;
  }
}