/* ===============================================
   AKM MUSIC - TOOLS PAGE STYLES
   Extends master-design.css
   =============================================== */

/* Tools Page Variables */
:root {
  --tools-gradient-start: #2563eb;
  --tools-gradient-end: #1e40af;
  --tools-card-bg: rgba(255, 255, 255, 0.98);
  --tools-card-hover-shadow: 0 20px 40px rgba(37, 99, 235, 0.15);
}

/* ===============================================
   TOOLS HERO SECTION
   =============================================== */

.tools-hero {
  position: relative;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--tools-gradient-start) 0%, var(--tools-gradient-end) 100%);
  color: var(--color-white);
  overflow: hidden;
}

/* Disable overlay pattern entirely to avoid tint */
.tools-hero::before { content: none !important; display: none !important; background: none !important; opacity: 1 !important; }

.tools-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  padding: var(--space-xl);
}

.tools-hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-black);
  color: var(--color-white);
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-md);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.tools-hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-white);
  opacity: 0.95;
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .tools-hero {
    min-height: 400px;
  }
  
  .tools-hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .tools-hero-description {
    font-size: var(--font-size-lg);
  }
}

/* ===============================================
   TOOLS SECTION
   =============================================== */

.tools-section {
  padding: var(--space-4xl) 0;
  background: var(--bg-section-light);
}

.tools-container {
  max-width: var(--max-width-xl);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

@media (min-width: 1024px) {
  .tools-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 768px) and (max-width: 1023.98px) {
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767.98px) {
  .tools-grid { grid-template-columns: 1fr; }
}

/* ===============================================
   TOOL CARDS
   =============================================== */

.tool-card {
  background: var(--tools-card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 300px;
  overflow: hidden;
}

@media (max-width: 1024px) { .tool-card { height: 280px; } }
@media (max-width: 768px)  { .tool-card { height: 260px; } }

.tool-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--tools-card-hover-shadow);
  border-color: var(--color-primary-light);
}

.tool-header {
  text-align: center;
  margin-bottom: var(--space-md);
}

.tool-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-3xl);
  color: var(--color-white);
  box-shadow: var(--shadow-lg);
}

.tool-header h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.tool-header p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.tool-body {
  margin-bottom: var(--space-lg);
  flex: 1;
  overflow: auto;
  padding-bottom: var(--space-sm);
}

/* Compact buttons inside cards */
.tool-card .btn-3d,
.tool-card .tool-button { padding: 8px 12px; font-size: 0.9rem; }
.tool-card .metronome-actions { display: flex; gap: var(--space-sm); }

/* ===============================================
   TOOL CONTROLS
   =============================================== */

.tool-control-group {
  margin-bottom: var(--space-lg);
}

.tool-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.tool-input,
.tool-select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--color-white);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
}

.tool-input:focus,
.tool-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.tool-slider {
  width: 100%;
  height: 8px;
  border-radius: var(--border-radius-sm);
  background: var(--color-gray-200);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.tool-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.tool-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: var(--shadow-lg);
}

.tool-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.tool-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
  box-shadow: var(--shadow-lg);
}

/* ===============================================
   TOOL BUTTONS
   =============================================== */

.tool-button {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.tool-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.tool-button:active {
  transform: translateY(0);
}

.tool-button.active {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
}

.tool-button-group {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.tool-button-group .tool-button {
  flex: 1;
}

/* ===============================================
   TUNER DISPLAY
   =============================================== */

.tuner-display {
  background: var(--color-gray-900);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  margin-bottom: var(--space-lg);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3);
}

.tuner-main-display {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-xl);
}

.note-display-large {
  font-size: 5rem;
  font-weight: var(--font-weight-black);
  color: var(--color-primary-light);
  text-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
  font-family: monospace;
  min-width: 120px;
  text-align: center;
}

.note-display-large.in-tune {
  color: var(--color-success);
  text-shadow: 0 0 20px rgba(16, 185, 129, 0.5);
}

.tuner-gauge {
  position: relative;
  width: 100%;
  max-width: 400px;
  height: 60px;
  margin: 0 auto var(--space-lg);
  background: var(--color-gray-800);
  border-radius: var(--border-radius-md);
  overflow: hidden;
}

.gauge-track {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-gray-700);
  transform: translateY(-50%);
}

.gauge-center {
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  background: var(--color-white);
  transform: translateX(-50%);
  opacity: 0.3;
}

.gauge-needle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 40px;
  background: var(--color-accent);
  border-radius: var(--border-radius-sm);
  transform: translateX(-50%) translateY(-50%);
  transform-origin: center center;
  transition: all 0.1s ease-out;
  box-shadow: 0 0 10px rgba(220, 38, 38, 0.5);
}

.gauge-needle.in-tune {
  background: var(--color-success);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

.tuner-info {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 8px;
}

.tuner-info-label {
  font-size: .7rem;
  color: #9ca3af;
}

.tuner-info-value {
  font-size: .95rem;
  font-family: monospace;
}

.tuner-status {
  font-size: .9rem;
  text-align: center;
  color: #93c5fd;
}

.tuner-start {
  margin-top: 8px;
}

@media (max-width: 768px) {
  .note-display-large {
    font-size: 4rem;
  }
  
  .tuner-gauge {
    max-width: 300px;
  }
}

/* ===============================================
   STRING BUTTONS
   =============================================== */

.string-buttons {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.string-btn {
  padding: var(--space-md) var(--space-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  background: var(--color-gray-700);
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.string-btn:hover {
  background: var(--color-primary);
  transform: scale(1.05);
}

.string-btn:active {
  transform: scale(0.95);
}

@media (max-width: 768px) {
  .string-buttons {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===============================================
   METRONOME VISUAL
   =============================================== */

.metronome-visual {
  width: 120px;
  height: 26px;
  background: var(--color-gray-200);
  border-radius: 999px;
  position: relative;
  overflow: hidden;
}

.metronome-visual .beat-indicator {
  position: absolute;
  left: 4px;
  top: 4px;
  width: 18px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 50%;
  transition: transform .2s ease;
}

.metronome-display {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 10px;
}

.bpm-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
}

.bpm-display span {
  font-size: 2rem;
  font-weight: 800;
}

.bpm-slider {
  height: 6px;
}

.tempo-labels {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  font-size: .8rem;
  color: var(--text-muted);
}

/* ===============================================
   CHORD & SCALE DISPLAY
   =============================================== */

.chord-display,
.scale-display {
  background: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-sm);
}

.chord-notes,
.scale-notes {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-top: var(--space-lg);
}

.note-badge {
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-white);
  border: 2px solid var(--color-primary);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.note-badge.active {
  background: var(--color-primary);
  color: var(--color-white);
}

.chord-select, .scale-select {
  height: 36px;
  font-size: .95rem;
}

.chord-selector, .scale-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

/* ===============================================
   PIANO KEYBOARD
   =============================================== */

.piano-keyboard {
  display: flex;
  justify-content: center;
  gap: 2px;
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  background: var(--color-gray-900);
  border-radius: var(--border-radius-lg);
  overflow-x: auto;
}

.piano-key {
  position: relative;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.piano-key.white {
  width: 40px;
  height: 140px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: var(--space-xs);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.piano-key.black {
  width: 28px;
  height: 90px;
  background: var(--color-gray-900);
  border-radius: 0 0 var(--border-radius-sm) var (--border-radius-sm);
  margin: 0 -14px;
  z-index: 2;
  box-shadow: var(--shadow-md);
}

.piano-key.white:hover {
  background: var(--color-gray-100);
}

.piano-key.black:hover {
  background: var(--color-gray-800);
}

.piano-key.active {
  background: var(--color-primary) !important;
  color: var(--color-white) !important;
  transform: scale(1.05);
}

@media (max-width: 768px) {
  .piano-key.white {
    width: 30px;
    height: 120px;
  }
  
  .piano-key.black {
    width: 20px;
    height: 75px;
    margin: 0 -10px;
  }
}

/* ===============================================
   CIRCLE OF FIFTHS
   =============================================== */

.circle-of-fifths-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--space-lg);
}

#circleOfFifths {
  max-width: 220px;
  height: auto;
}

.circle-key {
  cursor: pointer;
  transition: all var(--transition-fast);
}

.circle-key:hover {
  opacity: 0.8;
  transform: scale(1.1);
}

#circleInfo {
  min-height: 150px;
  padding: var(--space-xl);
  background: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
  border: 2px solid var(--color-primary);
  width: 100%;
  max-width: 400px;
}

#circleInfo h4 {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

#circleInfo p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.circle-container {
  display: flex;
  justify-content: center;
}

/* ===============================================
   BPM CALCULATOR
   =============================================== */

.bpm-result {
  padding: var(--space-xl);
  background: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
  border: 2px solid var(--color-success);
  text-align: center;
  margin-top: 8px;
  min-height: 100px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-weight: 600;
}

.bpm-result-value {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-black);
  color: var(--color-success);
  margin-bottom: var(--space-xs);
}

.bpm-result-text {
  font-size: var(--font-size-base);
  color: var(--text-muted);
}

.bpm-calculator .input-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.bpm-input {
  height: 36px;
  font-size: .95rem;
}

/* ===============================================
   LOADING & ERROR STATES
   =============================================== */

.tool-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
  color: var(--text-muted);
}

.tool-error {
  padding: var(--space-lg);
  background: rgba(220, 38, 38, 0.1);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-md);
  color: var(--color-accent);
  text-align: center;
  margin-top: var(--space-lg);
}

/* ===============================================
   RESPONSIVE ADJUSTMENTS
   =============================================== */

@media (max-width: 768px) {
  .tool-card {
    padding: var(--space-lg);
  }
  
  .tool-icon {
    width: 48px;
    height: 48px;
    font-size: var(--font-size-2xl);
  }
  
  .tool-header h3 {
    font-size: var(--font-size-xl);
  }
  
  .tool-button-group {
    flex-direction: column;
  }
}