/* ==========================================
   Aishwarya's PhD Data Tool - Stylesheet
   Theme: Scholarly Burgundy & Muted Gold
   ========================================== */

:root {
  --primary: #800020;        /* Scholar Burgundy */
  --primary-hover: #5d0016;  
  --secondary: #2b3a4a;      /* Academic Blue */
  --accent: #b8860b;         /* Dark Goldenrod */
  --accent-light: #f4ebd0;   /* Muted Gold highlights */
  --bg-color: #fafaf8;       /* Off-white parchment */
  --card-bg: #ffffff;        
  --text-dark: #20252b;      
  --text-muted: #5e6875;     
  --border-color: #e6e2da;   /* Soft antique border */
  --success: #2e7d32;        /* Ivy Green */
  --error: #c62828;          /* Crimson Red */
  --shadow: 0 4px 20px rgba(128, 0, 32, 0.05);
  --shadow-lg: 0 10px 30px rgba(128, 0, 32, 0.08);
  --border-radius: 8px;
}

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-dark);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Scholarly ambient backgrounds */
.bg-glow-1 {
  position: absolute;
  top: -10%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(128, 0, 32, 0.03) 0%, rgba(255,255,255,0) 70%);
  z-index: -1;
  pointer-events: none;
}

.bg-glow-2 {
  position: absolute;
  bottom: -10%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(184, 134, 11, 0.03) 0%, rgba(255,255,255,0) 70%);
  z-index: -1;
  pointer-events: none;
}

/* Helper Utilities */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.hidden {
  display: none !important;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.divider {
  height: 2px;
  background: linear-gradient(to right, transparent, var(--border-color) 30%, var(--border-color) 70%, transparent);
  margin: 1.5rem 0;
}

.badge {
  background-color: var(--accent-light);
  color: var(--primary);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid rgba(184, 134, 11, 0.25);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: fit-content;
}

.channel-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease, text-decoration 0.2s ease;
}

.channel-link:hover {
  text-decoration: underline;
  color: var(--primary-hover);
}

.margin-top {
  margin-top: 2rem;
}

/* Typography */
h1, h2, h3, h4, .scholarly-title {
  font-family: 'Cinzel', Georgia, serif;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.5px;
}

h2 {
  font-size: 1.75rem;
  border-bottom: 2px solid var(--accent-light);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
  display: inline-block;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

/* Button UI */
.btn {
  font-family: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--border-radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background-color: #1e2833;
  transform: translateY(-1px);
}

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

.btn-success:hover {
  background-color: #1b5e20;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-dark);
}

.btn-outline:hover {
  background-color: rgba(128, 0, 32, 0.04);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

/* INPUT FORM ELEMENTS */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

input[type="text"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-dark);
  background-color: #ffffff;
  transition: all 0.2s ease;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(128, 0, 32, 0.08);
}

/* PASSWORD GATE SCREEN */
#login-screen {
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1.5rem;
}

#login-screen.active {
  display: flex;
}

.login-container {
  background-color: var(--card-bg);
  padding: 3rem 2.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  max-width: 440px;
  width: 100%;
  text-align: center;
}

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

.login-container h1 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.error-msg {
  color: var(--error);
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: 1rem;
}

/* APP HEADER */
.app-header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
}

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

.logo-icon {
  font-size: 2.2rem;
}

.scholarly-title {
  font-size: 1.35rem;
}

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

/* RESEARCH INTENT CARD */
.research-overview {
  background: linear-gradient(135deg, #ffffff 0%, #fcfbf9 100%);
  border-left: 4px solid var(--primary);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 3rem;
}

.research-overview h2 {
  font-size: 1.35rem;
  border: none;
  padding: 0;
  margin-bottom: 0.75rem;
}

.research-overview p {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: justify;
}

/* SECTION HEADERS */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.section-header h2 {
  margin-bottom: 0;
  padding-bottom: 0.25rem;
}

/* PROJECTS GRID */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.project-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--primary);
  line-height: 1.4;
}

.project-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-meta-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 1.5rem;
  background-color: #fcfcfc;
  padding: 0.75rem;
  border-radius: var(--border-radius);
  border: 1px solid rgba(230, 226, 218, 0.5);
  max-width: 100%;
  box-sizing: border-box;
}

.project-meta-pills div {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.project-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
}

.project-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* BREADCRUMBS */
.breadcrumbs {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.crumb-link {
  color: var(--primary);
  cursor: pointer;
  font-weight: 600;
}

.crumb-link:hover {
  text-decoration: underline;
}

.crumb-active {
  color: var(--text-dark);
}

/* PROJECT DETAILS SCREEN HEADER */
.project-title-bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
  gap: 2rem;
}

.project-desc-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 0.5rem;
}

.project-actions {
  display: flex;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* METRICS PANEL */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.metric-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  box-shadow: var(--shadow);
}

.metric-icon {
  font-size: 2.2rem;
  background-color: var(--bg-color);
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border-color);
}

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

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

.metric-info h3 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.75rem;
  color: var(--primary);
  margin-bottom: 0;
}

/* TWO COLUMN PANEL LAYOUT */
.grid-two-column {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 1.5rem;
}

.panel {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.panel-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

/* FILTERS FORM */
.filters-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.filters-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* TABLE SYSTEM styling */
.table-container {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

th {
  background-color: #f7f5f0;
  color: var(--primary);
  font-weight: 700;
  padding: 0.85rem 1rem;
  border-bottom: 2px solid var(--border-color);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-dark);
  vertical-align: middle;
}

tr:last-child td {
  border-bottom: none;
}

tbody tr:nth-child(even) {
  background-color: #fdfdfc;
}

tbody tr:hover {
  background-color: #f8ebd024;
}

/* SPECIAL TABLE COMPONENTS */
.panel-header-inline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.panel-header-inline h3 {
  margin-bottom: 0;
}

.channel-name-cell {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  color: var(--primary);
}

.channel-thumbnail {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border-color);
}

/* SEARCH DISCOVERY WINDOW */
.search-box-bar {
  display: flex;
  gap: 0.75rem;
}

.search-box-bar input {
  font-size: 1rem;
  padding: 0.9rem 1.2rem;
}

.search-box-bar .btn {
  padding: 0 2rem;
  font-size: 1rem;
}

/* MODAL OVERLAY & CONTENT */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(43, 58, 74, 0.5); /* Semitransparent academic grey */
  backdrop-filter: blur(3px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background-color: var(--card-bg);
  border: 1px solid var(--accent);
  border-radius: 12px;
  max-width: 500px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  background-color: #f7f5f0;
  border-bottom: 1px solid var(--border-color);
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  margin-bottom: 0;
  font-size: 1.2rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.modal-close:hover {
  color: var(--primary);
}

.create-project-form {
  padding: 1.5rem;
}

#create-project-form {
  padding: 1.5rem;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* GLOBAL LOADING INDEX OVERLAY */
.loader-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(2px);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.loader-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 1rem;
}

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

.loader-overlay p {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.95rem;
}

/* LOADER / LOADING / EMPTY STATES */
.loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-weight: 500;
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
  background-color: #fdfdfc;
  border: 1.5px dashed var(--border-color);
  border-radius: var(--border-radius);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.trash-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  transition: color 0.2s ease;
  padding: 0.25rem;
}

.trash-btn:hover {
  color: var(--error);
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 992px) {
  .grid-two-column {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  .header-logo {
    flex-direction: column;
    gap: 0.5rem;
  }
  .project-title-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }
  .project-actions {
    width: 100%;
  }
  .project-actions .btn {
    flex-grow: 1;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .search-box-bar {
    flex-direction: column;
  }
  .search-box-bar .btn {
    padding: 0.8rem 1.5rem;
  }
}