/* ==========================================================================
   DESIGN TOKENS & VARIABLES
   ========================================================================== */
:root {
  --font-title: 'Outfit', 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;

  /* Colors */
  --bg-dark: #070913;
  --card-bg: rgba(13, 17, 39, 0.55);
  --card-border: rgba(255, 255, 255, 0.07);
  --card-border-hover: rgba(99, 102, 241, 0.35);
  --card-border-focus: rgba(139, 92, 246, 0.6);
  
  --primary: #6366f1; /* Indigo */
  --primary-glow: rgba(99, 102, 241, 0.15);
  --secondary: #8b5cf6; /* Violet */
  --accent: #06b6d4; /* Cyan */
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Status Colors */
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.1);
  --color-error: #ef4444;
  --color-error-bg: rgba(239, 68, 68, 0.1);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px -2px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 25px 0px rgba(99, 102, 241, 0.2);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  line-height: 1.5;
  padding-bottom: 2rem;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(15, 23, 42, 0.6);
}
::-webkit-scrollbar-thumb {
  background: rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-sm);
  border: 2px solid rgba(15, 23, 42, 0.6);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(99, 102, 241, 0.5);
}

/* Ambient glow backgrounds */
.glow-bg {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.4;
}
.glow-1 {
  top: -10%;
  left: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
}
.glow-2 {
  bottom: 20%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--secondary) 0%, transparent 75%);
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* ==========================================================================
   APP HEADER
   ========================================================================== */
.app-header {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: rgba(13, 17, 39, 0.45);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.logo-icon i {
  color: white;
  width: 24px;
  height: 24px;
}

h1 {
  font-family: var(--font-title);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(135deg, #ffffff 30%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Global status badge */
.save-status-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition-fast);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.save-status-badge.saving {
  background-color: var(--color-warning-bg);
  border-color: rgba(245, 158, 11, 0.2);
  color: var(--color-warning);
}
.save-status-badge.saving .status-icon {
  animation: pulse-spin 1.5s infinite linear;
}

.save-status-badge.success {
  background-color: var(--color-success-bg);
  border-color: rgba(16, 185, 129, 0.2);
  color: var(--color-success);
}

.save-status-badge.error {
  background-color: var(--color-error-bg);
  border-color: rgba(239, 68, 68, 0.2);
  color: var(--color-error);
}

/* ==========================================================================
   STATS PANEL
   ========================================================================== */
.stats-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-box {
  background: rgba(30, 41, 59, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.03);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  transition: var(--transition-fast);
}

.stat-box:hover {
  background: rgba(30, 41, 59, 0.45);
  border-color: rgba(255, 255, 255, 0.05);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-val {
  font-family: var(--font-title);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
}

.progress-box {
  grid-column: span 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.5rem;
}

@media (max-width: 768px) {
  .progress-box {
    grid-column: span 1;
  }
}

.progress-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.progress-bar-container {
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
  width: 100%;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

/* ==========================================================================
   CONTROLS PANEL
   ========================================================================== */
.controls-panel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 260px;
  max-width: 450px;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 18px;
  height: 18px;
  pointer-events: none;
  transition: var(--transition-fast);
}

.search-wrapper input {
  width: 100%;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.75rem 1rem 0.75rem 2.8rem;
  border-radius: var(--radius-md);
  color: white;
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.search-wrapper input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: rgba(15, 23, 42, 0.8);
}

.search-wrapper input:focus + .search-icon {
  color: var(--primary);
}

.filter-tabs {
  display: flex;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.4);
  padding: 0.35rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.filter-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-fast);
}

.filter-btn i {
  width: 16px;
  height: 16px;
}

.filter-btn:hover {
  color: white;
  background: rgba(255, 255, 255, 0.03);
}

.filter-btn.active {
  color: white;
  background: var(--primary);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* ==========================================================================
   GRID GRID & CARDS
   ========================================================================== */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  min-height: 300px;
}

/* Loading state */
.loading-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--text-secondary);
  padding: 4rem 0;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(99, 102, 241, 0.1);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s infinite linear;
}

/* Card */
.day-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.day-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  transition: var(--transition-fast);
}

/* Card states */
.day-card.has-content {
  border-color: rgba(99, 102, 241, 0.15);
}
.day-card.has-content::before {
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
}

.day-card:hover {
  transform: translateY(-5px);
  border-color: var(--card-border-hover);
  box-shadow: var(--shadow-md), var(--primary-glow) 0px 8px 30px;
  background: rgba(13, 17, 39, 0.7);
}

.day-card:focus-within {
  border-color: var(--card-border-focus);
  box-shadow: var(--shadow-md), 0 0 15px rgba(139, 92, 246, 0.25);
  background: rgba(13, 17, 39, 0.8);
}

/* Card Header */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.date-info {
  display: flex;
  flex-direction: column;
}

.day-number-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  width: max-content;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.day-card.has-content .day-number-badge {
  background: var(--primary-glow);
  color: #a5b4fc;
}

.date-day {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.date-month {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.day-name {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
}

.day-card.is-today .day-name {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.day-card.is-today {
  border-color: rgba(99, 102, 241, 0.5);
  background: rgba(13, 17, 39, 0.75);
}

/* Card Body - Text Area */
.card-body {
  position: relative;
  flex-grow: 1;
}

.note-input {
  width: 100%;
  height: 110px;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.4;
  resize: none;
  transition: var(--transition-fast);
}

.note-input:focus {
  outline: none;
  background: rgba(15, 23, 42, 0.7);
  border-color: rgba(99, 102, 241, 0.4);
}

.note-input::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
  font-style: italic;
}

/* Save Indicator inside Card */
.card-save-status {
  position: absolute;
  bottom: 0.5rem;
  right: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.7rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(3px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  pointer-events: none;
}

.card-save-status.visible {
  opacity: 1;
  transform: translateY(0);
}

.card-save-status.saving {
  color: var(--color-warning);
}
.card-save-status.saved {
  color: var(--color-success);
}
.card-save-status.error {
  color: var(--color-error);
}

.card-save-status i {
  width: 12px;
  height: 12px;
}

/* Animations */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse-spin {
  0% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(180deg) scale(1.1);
  }
  100% {
    transform: rotate(360deg) scale(1);
  }
}

/* Empty search or filter results style */
.empty-results {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 5rem 1rem;
  color: var(--text-secondary);
  text-align: center;
  background: rgba(13, 17, 39, 0.25);
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(255, 255, 255, 0.05);
}

.empty-results i {
  width: 48px;
  height: 48px;
  color: var(--text-muted);
}

.empty-results p {
  font-size: 1.1rem;
  font-weight: 500;
}

.empty-results span {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ==========================================================================
   APP FOOTER
   ========================================================================== */
.app-footer {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive adjustment for extra small screens */
@media (max-width: 480px) {
  .app-header {
    padding: 1.25rem;
  }
  .header-main {
    flex-direction: column;
    align-items: flex-start;
  }
  .save-status-badge {
    align-self: stretch;
    justify-content: center;
  }
  .controls-panel {
    flex-direction: column;
    align-items: stretch;
  }
  .search-wrapper {
    max-width: 100%;
  }
  .filter-tabs {
    overflow-x: auto;
  }
}