/* ==========================================================================
   HABITFLOW — DAILY ROUTINE TIMELINE & HABIT CALENDAR STYLES
   Namespace: .hf-*
   ========================================================================== */

:root {
  --hf-bg: #f8fafc;
  --hf-card-bg: #ffffff;
  --hf-primary: #0284c7;
  --hf-primary-hover: #0369a1;
  --hf-primary-light: #f0f9ff;
  --hf-accent: #f59e0b;
  --hf-accent-light: #fffbeb;
  --hf-success: #10b981;
  --hf-success-light: #ecfdf5;
  --hf-border: #e2e8f0;
  --hf-border-light: #f1f5f9;
  --hf-text-main: #0f172a;
  --hf-text-muted: #64748b;
  --hf-text-subtle: #94a3b8;
  --hf-radius-sm: 8px;
  --hf-radius-md: 14px;
  --hf-radius-lg: 20px;
  --hf-shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --hf-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --hf-shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
}

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

body.hf-body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--hf-bg);
  color: var(--hf-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* NAVBAR */
.hf-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--hf-border);
  padding: 14px 28px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.hf-header-inner {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hf-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--hf-text-main);
}

.hf-brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #0284c7 0%, #f59e0b 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 17px;
  box-shadow: 0 4px 10px rgba(2, 132, 199, 0.25);
}

.hf-brand-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hf-brand-tagline {
  font-size: 11px;
  color: var(--hf-text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.hf-live-clock-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: #f1f5f9;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  color: var(--hf-text-muted);
}

.hf-nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.hf-nav-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--hf-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.hf-nav-links a:hover, .hf-nav-links a.hf-active {
  color: var(--hf-primary);
}

/* MAIN LAYOUT WRAPPER */
.hf-main-container {
  max-width: 1300px;
  margin: 32px auto 60px;
  padding: 0 24px;
  width: 100%;
  flex: 1;
}

/* HERO BANNER */
.hf-hero-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-radius: var(--hf-radius-lg);
  color: #ffffff;
  padding: 36px 40px;
  margin-bottom: 28px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--hf-shadow-md);
}

.hf-hero-badge {
  display: inline-block;
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.hf-hero-title {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
  max-width: 750px;
}

.hf-hero-desc {
  font-size: 14px;
  color: #94a3b8;
  max-width: 700px;
  line-height: 1.6;
}

/* PHASE TABS STRIP */
.hf-phase-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.hf-phase-tab-btn {
  background-color: var(--hf-card-bg);
  border: 2px solid var(--hf-border);
  border-radius: var(--hf-radius-md);
  padding: 16px;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
}

.hf-phase-tab-btn:hover {
  border-color: #cbd5e1;
  background-color: #f8fafc;
}

.hf-phase-tab-btn.hf-tab-active {
  border-color: var(--hf-primary);
  background-color: var(--hf-primary-light);
  box-shadow: var(--hf-shadow-sm);
}

.hf-phase-tab-time {
  font-size: 11px;
  font-weight: 800;
  color: var(--hf-primary);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.hf-phase-tab-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--hf-text-main);
  line-height: 1.3;
}

/* 2-COLUMN TIMELINE HUB GRID */
.hf-timeline-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 28px;
  margin-bottom: 40px;
}

/* LEFT: ACTIVE PHASE CANVAS */
.hf-phase-card {
  background-color: var(--hf-card-bg);
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-lg);
  padding: 32px;
  box-shadow: var(--hf-shadow-sm);
}

.hf-phase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hf-border-light);
}

.hf-phase-title-wrap h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--hf-text-main);
  margin-bottom: 4px;
}

.hf-phase-subtitle {
  font-size: 13px;
  color: var(--hf-text-muted);
}

.hf-energy-badge {
  font-size: 12px;
  font-weight: 700;
  background-color: var(--hf-accent-light);
  color: #b45309;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid #fde68a;
}

/* HABIT ROUTINE CHECKLIST */
.hf-routine-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.hf-routine-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  background-color: #f8fafc;
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.hf-routine-item:hover {
  background-color: #ffffff;
  border-color: #cbd5e1;
}

.hf-routine-item.hf-completed {
  background-color: var(--hf-success-light);
  border-color: #a7f3d0;
}

.hf-checkbox-box {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 2px solid #cbd5e1;
  background-color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 800;
}

.hf-routine-item.hf-completed .hf-checkbox-box {
  background-color: var(--hf-success);
  border-color: var(--hf-success);
  color: #ffffff;
}

.hf-routine-details {
  flex: 1;
}

.hf-routine-time-badge {
  font-size: 11px;
  font-weight: 800;
  color: var(--hf-primary);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.hf-routine-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--hf-text-main);
  line-height: 1.4;
  margin-bottom: 4px;
}

.hf-routine-item.hf-completed .hf-routine-name {
  text-decoration: line-through;
  color: var(--hf-text-muted);
}

.hf-routine-desc {
  font-size: 12px;
  color: var(--hf-text-muted);
  line-height: 1.4;
}

/* TIMER WIDGET STRIP */
.hf-timer-strip {
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  border: 1px solid #bae6fd;
  border-radius: var(--hf-radius-md);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hf-timer-info h4 {
  font-size: 14px;
  font-weight: 700;
  color: #0369a1;
  margin-bottom: 2px;
}

.hf-timer-info p {
  font-size: 12px;
  color: #0c4a6e;
}

.hf-btn-timer {
  background-color: #0284c7;
  color: #ffffff;
  border: none;
  padding: 10px 18px;
  border-radius: var(--hf-radius-sm);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.hf-btn-timer:hover {
  background-color: #0369a1;
}

/* RIGHT: CUSTOM PLANNER SIDEBAR */
.hf-planner-card {
  background-color: var(--hf-card-bg);
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-lg);
  padding: 28px;
  box-shadow: var(--hf-shadow-sm);
}

.hf-planner-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--hf-text-main);
  margin-bottom: 4px;
}

.hf-planner-subtitle {
  font-size: 12px;
  color: var(--hf-text-muted);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hf-border-light);
}

.hf-slider-control {
  margin-bottom: 24px;
}

.hf-slider-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.hf-slider-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--hf-text-main);
}

.hf-slider-val {
  font-size: 13px;
  font-weight: 800;
  color: var(--hf-primary);
  background-color: var(--hf-primary-light);
  padding: 2px 8px;
  border-radius: 6px;
}

.hf-range {
  width: 100%;
  height: 6px;
  background: #e2e8f0;
  border-radius: 3px;
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.hf-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #0284c7;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.4);
}

.hf-dynamic-breaks-box {
  background-color: #f8fafc;
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-md);
  padding: 16px;
  margin-bottom: 20px;
}

.hf-breaks-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--hf-text-main);
  margin-bottom: 10px;
}

.hf-break-slot {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--hf-border);
  color: var(--hf-text-muted);
}

.hf-break-slot:last-child {
  border-bottom: none;
}

.hf-break-slot strong {
  color: var(--hf-primary);
}

/* DEEP DIVE ARTICLES GRID */
.hf-edu-section {
  background-color: var(--hf-card-bg);
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-lg);
  padding: 36px;
  margin-bottom: 32px;
  box-shadow: var(--hf-shadow-sm);
}

.hf-edu-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--hf-text-main);
  margin-bottom: 12px;
}

.hf-edu-desc {
  font-size: 14px;
  color: var(--hf-text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.hf-edu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.hf-edu-card {
  background-color: #f8fafc;
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-md);
  padding: 20px;
}

.hf-edu-card h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--hf-text-main);
  margin-bottom: 6px;
}

.hf-edu-card p {
  font-size: 13px;
  color: var(--hf-text-muted);
  line-height: 1.5;
}

/* AUTHOR STRIP */
.hf-author-strip {
  background-color: var(--hf-card-bg);
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-lg);
  padding: 28px;
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 32px;
  box-shadow: var(--hf-shadow-sm);
}

.hf-author-img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--hf-primary);
  flex-shrink: 0;
}

.hf-author-info h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--hf-text-main);
  margin-bottom: 4px;
}

.hf-author-role {
  font-size: 12px;
  font-weight: 600;
  color: var(--hf-primary);
  margin-bottom: 8px;
}

.hf-author-info p {
  font-size: 13px;
  color: var(--hf-text-muted);
  line-height: 1.6;
}

/* SUBPAGE GENERIC CARD */
.hf-subpage-card {
  background-color: var(--hf-card-bg);
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-lg);
  padding: 40px;
  box-shadow: var(--hf-shadow-sm);
  margin-bottom: 32px;
}

.hf-subpage-card h1 {
  font-size: 28px;
  font-weight: 800;
  color: var(--hf-text-main);
  margin-bottom: 8px;
}

.hf-subpage-card h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--hf-text-main);
  margin: 28px 0 12px;
}

.hf-subpage-card p {
  font-size: 14px;
  color: #334155;
  line-height: 1.8;
  margin-bottom: 16px;
}

.hf-subpage-card ul, .hf-subpage-card ol {
  margin-bottom: 20px;
  padding-left: 20px;
}

.hf-subpage-card li {
  margin-bottom: 8px;
  font-size: 14px;
  color: #334155;
}

/* FORMS */
.hf-form-group {
  margin-bottom: 20px;
}

.hf-form-label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--hf-text-main);
}

.hf-form-input, .hf-form-textarea, .hf-form-select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--hf-border);
  border-radius: var(--hf-radius-sm);
  font-family: inherit;
  font-size: 14px;
  background-color: #ffffff;
}

.hf-form-input:focus, .hf-form-textarea:focus, .hf-form-select:focus {
  outline: none;
  border-color: var(--hf-primary);
  box-shadow: 0 0 0 3px var(--hf-primary-light);
}

.hf-btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  border: none;
  padding: 12px 24px;
  border-radius: var(--hf-radius-sm);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.hf-btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
}

/* FOOTER */
.hf-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--hf-border);
  padding: 32px 28px;
  margin-top: auto;
}

.hf-footer-inner {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.hf-footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
  flex-wrap: wrap;
}

.hf-footer-links a {
  font-size: 13px;
  color: var(--hf-text-muted);
  text-decoration: none;
}

.hf-footer-links a:hover {
  color: var(--hf-primary);
}

.hf-footer-copy {
  font-size: 12px;
  color: var(--hf-text-subtle);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hf-phase-tabs {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hf-timeline-grid {
    grid-template-columns: 1fr;
  }
  
  .hf-edu-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hf-phase-tabs {
    grid-template-columns: 1fr;
  }
  
  .hf-hero-title {
    font-size: 22px;
  }
  
  .hf-hero-banner {
    padding: 24px 20px;
  }
  
  .hf-author-strip {
    flex-direction: column;
    text-align: center;
  }
}