/* ==========================================================================
   BƯỚC TIẾP — UNESCO YOUTH HACKATHON 2026 SURVEY SYSTEM
   Official Brand Color Palette: Ocean Navy (#16375D), Ocean Blue (#2F80ED), Nature Green (#4EA36B)
   Pure Light Theme | Be Vietnam Pro Typography | 0% Glassmorphism
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,400;0,500;0,600;0,700;0,800;1,500;1,600&family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* Official BƯỚC TIẾP Palette */
  --color-ocean: #16375D;         /* Primary Deep Ocean Navy */
  --color-ocean-light: #2F80ED;   /* Vibrant Ocean Blue */
  --color-ocean-muted: #5A6D7E;   /* Muted Slate Blue */
  --color-sky-soft: #DCEBFB;      /* Soft Sky Border Tint */
  --color-sky-bg: #EDF3FB;        /* Soft Sky Light BG */
  --color-sky-card: #E9F3FF;      /* Light Sky Highlight */
  
  --color-nature-green: #4EA36B;  /* Nature Green Accent */
  --color-nature-bg: #EEF7E6;     /* Soft Nature Tint */
  --color-warm-amber: #E8952F;    /* Warm Amber Accent */
  
  --color-bg-body: #EDF3FB;       /* Solid Light Sky BG */
  --color-bg-card: #FFFFFF;       /* Solid Pure White Card BG */
  
  --color-text-main: #16375D;     /* Deep Ocean Text (High Contrast) */
  --color-text-muted: #5A6D7E;    /* Medium Muted Slate */
  --color-text-light: #7E90A3;    /* Light Muted Text */
  
  --color-border: #DCEBFB;        /* Clean Sky Border */
  --color-border-active: #2F80ED; /* Active Border */
  --color-warning: #E8952F;       /* Amber Warning */
  --color-error: #DC2626;         /* Crimson Error */
  
  --font-sans: 'Be Vietnam Pro', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-card: 0 8px 24px rgba(31, 80, 140, 0.12);
  --shadow-sm: 0 2px 6px rgba(31, 80, 140, 0.06);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--color-bg-body);
  color: var(--color-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hidden {
  display: none !important;
}

/* Header */
.app-header {
  background-color: #FFFFFF;
  color: var(--color-ocean);
  padding: 14px 20px;
  border-bottom: 3px solid var(--color-ocean-light);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(31, 80, 140, 0.08);
}

.header-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-badge {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-ocean-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(47, 128, 237, 0.3);
}

.brand-text-group {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: var(--color-ocean);
  line-height: 1.1;
}

.brand-sub {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-ocean-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.header-nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-link-btn {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-ocean-light);
  background-color: var(--color-sky-card);
  border: 1px solid var(--color-sky-soft);
  padding: 6px 12px;
  border-radius: 99px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
}

.nav-link-btn:hover {
  background-color: var(--color-ocean-light);
  color: #FFFFFF;
  border-color: var(--color-ocean-light);
}

/* Main Container */
.survey-container {
  max-width: 800px;
  width: 100%;
  margin: 28px auto;
  padding: 0 16px;
  flex: 1;
}

/* Base Card Component */
.card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-card);
  margin-bottom: 28px;
}

@media (max-width: 640px) {
  .card {
    padding: 24px 18px;
    border-radius: var(--radius-md);
  }
}

/* Intro Section */
.eyebrow {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--color-ocean-light);
  margin-bottom: 8px;
}

h1.main-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-ocean);
  line-height: 1.35;
  margin-bottom: 20px;
}

@media (max-width: 640px) {
  h1.main-title {
    font-size: 20px;
  }
}

.intro-body p {
  color: var(--color-text-muted);
  font-size: 15px;
  margin-bottom: 14px;
}

.intro-quote {
  background-color: var(--color-sky-card);
  border-left: 4px solid var(--color-ocean-light);
  padding: 16px 20px;
  margin: 20px 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-ocean);
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.5;
}

/* Showcases for Landing Page & Web App Demo */
.ecosystem-showcase {
  background-color: var(--color-nature-bg);
  border: 1px solid #CFE6B8;
  border-left: 4px solid var(--color-nature-green);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 24px 0;
}

.ecosystem-title {
  font-size: 15px;
  font-weight: 800;
  color: #1B4D3E;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 14px;
}

@media (max-width: 600px) {
  .showcase-grid {
    grid-template-columns: 1fr;
  }
}

.showcase-item {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.showcase-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 18px rgba(31, 80, 140, 0.15);
  border-color: var(--color-ocean-light);
}

.showcase-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top center;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-sky-bg);
}

@media (max-width: 600px) {
  .showcase-img {
    height: 190px;
  }
}

.showcase-content {
  padding: 12px 14px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.showcase-badge {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-nature-green);
  background-color: var(--color-nature-bg);
  padding: 2px 6px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 6px;
  width: fit-content;
}

.showcase-item-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ocean);
  margin-bottom: 4px;
}

.showcase-item-desc {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.4;
  margin-bottom: 10px;
}

.showcase-btn {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-ocean-light);
  text-decoration: none;
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.showcase-btn:hover {
  text-decoration: underline;
}

.product-intro-box {
  background-color: var(--color-sky-card);
  border: 1px solid var(--color-sky-soft);
  border-left: 4px solid var(--color-ocean-light);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 24px 0;
}

.product-intro-box h3 {
  color: var(--color-ocean);
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.product-intro-box p {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 10px;
}

.product-intro-box ul {
  padding-left: 20px;
  margin-bottom: 12px;
  font-size: 13.5px;
  color: var(--color-ocean);
}

.product-intro-box li {
  margin-bottom: 6px;
}

.core-message {
  font-style: italic;
  font-weight: 700;
  color: var(--color-ocean) !important;
  background: var(--color-sky-soft);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-top: 6px;
}

.privacy-notice {
  font-size: 13px;
  color: var(--color-text-muted);
  background-color: var(--color-bg-body);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  margin-top: 20px;
}

/* Form Wizard & Progress */
.progress-wrapper {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.step-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ocean);
}

.step-counter {
  font-size: 13px;
  font-weight: 800;
  color: var(--color-ocean-light);
  background-color: var(--color-sky-card);
  padding: 2px 10px;
  border-radius: 99px;
}

.progress-track {
  height: 8px;
  background-color: #DCEBFB;
  border-radius: 99px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--color-ocean-light);
  width: 25%;
  transition: width 0.3s ease;
  border-radius: 99px;
}

/* Question Styling */
.question-block {
  margin-bottom: 32px;
}

.question-block:last-child {
  margin-bottom: 0;
}

.question-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ocean);
  margin-bottom: 12px;
  line-height: 1.4;
}

.required-star {
  color: var(--color-error);
  margin-left: 4px;
}

.question-hint {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: -6px;
  margin-bottom: 12px;
  font-style: italic;
}

/* Option Cards (Radios & Checkboxes) */
.options-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  min-height: 48px;
}

.option-card:hover {
  border-color: var(--color-ocean-light);
  background-color: var(--color-sky-card);
}

.option-card.selected {
  border-color: var(--color-ocean-light);
  background-color: var(--color-sky-card);
  box-shadow: 0 0 0 1px var(--color-ocean-light);
}

.option-card input[type="radio"],
.option-card input[type="checkbox"] {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  accent-color: var(--color-ocean-light);
  cursor: pointer;
  flex-shrink: 0;
}

.option-text {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--color-text-main);
  line-height: 1.4;
}

.option-card.selected .option-text {
  color: var(--color-ocean);
  font-weight: 700;
}

/* Scale 1-5 Rating Component */
.scale-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-top: 8px;
}

.scale-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 6px;
  cursor: pointer;
  background-color: var(--color-bg-card);
  transition: all 0.2s ease;
  text-align: center;
}

.scale-card:hover {
  border-color: var(--color-ocean-light);
  background-color: var(--color-sky-card);
}

.scale-card.selected {
  border-color: var(--color-ocean-light);
  background-color: var(--color-ocean-light);
  color: #FFFFFF;
}

.scale-card.selected .scale-num,
.scale-card.selected .scale-label {
  color: #FFFFFF;
}

.scale-num {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-ocean);
}

.scale-label {
  font-size: 10px;
  color: var(--color-text-muted);
  margin-top: 4px;
  line-height: 1.2;
}

/* Input Fields & Textarea */
.form-control {
  width: 100%;
  padding: 12px 14px;
  font-size: 14.5px;
  font-family: var(--font-sans);
  color: var(--color-text-main);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-ocean-light);
  box-shadow: 0 0 0 3px rgba(47, 128, 237, 0.15);
}

textarea.form-control {
  min-height: 90px;
  resize: vertical;
}

.error-message {
  color: var(--color-error);
  font-size: 13px;
  font-weight: 600;
  margin-top: 6px;
  display: none;
}

.question-block.has-error .error-message {
  display: block;
}

.question-block.has-error .option-card,
.question-block.has-error .form-control {
  border-color: var(--color-error);
}

/* Navigation Buttons */
.action-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-ocean-light);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: #1C6EE0;
  box-shadow: 0 4px 12px rgba(47, 128, 237, 0.3);
}

.btn-secondary {
  background-color: #F1F5F9;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: #E2E8F0;
  color: var(--color-ocean);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  width: 100%;
}

/* Loading & Thank You Cards */
.state-card {
  text-align: center;
  padding: 48px 32px;
}

.spinner-icon {
  width: 48px;
  height: 48px;
  border: 4px solid #DCEBFB;
  border-top-color: var(--color-ocean-light);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

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

.success-icon {
  width: 64px;
  height: 64px;
  background-color: var(--color-nature-bg);
  color: var(--color-nature-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto 20px;
}

.thankyou-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-ocean);
  margin-bottom: 12px;
}

.thankyou-body {
  font-size: 15px;
  color: var(--color-text-muted);
  max-width: 540px;
  margin: 0 auto 24px;
}

.response-summary-box {
  background-color: var(--color-bg-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: left;
  margin-bottom: 24px;
}

.response-summary-box h4 {
  font-size: 14px;
  font-weight: 800;
  color: var(--color-ocean);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.response-summary-box p {
  font-size: 13.5px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

/* Dashboard Data Table & No-Wrap Formatting */
.data-table-container {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  text-align: left;
}

.data-table th {
  background-color: var(--color-sky-card);
  color: var(--color-ocean);
  font-weight: 700;
  padding: 12px 14px;
  border-bottom: 2px solid var(--color-sky-soft);
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-main);
  vertical-align: middle;
  white-space: nowrap; /* Prevents text wrapping across table cells */
}

.data-table td:nth-child(2) {
  font-weight: 700;
  color: var(--color-ocean);
  white-space: nowrap;
}

.data-table td:nth-child(3) {
  font-family: monospace;
  font-weight: 600;
  white-space: nowrap;
}

.data-table td:nth-child(4) {
  white-space: normal; /* Allow org name to wrap smoothly if long */
  min-width: 160px;
}

.data-table td:last-child {
  white-space: nowrap;
}

.btn-edit-row, .btn-delete-row {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  padding: 6px 10px !important;
  font-size: 12px !important;
  line-height: 1;
}

.data-table tbody tr:hover {
  background-color: #F4F8FD;
}

/* Footer */
.app-footer {
  text-align: center;
  padding: 24px 16px;
  font-size: 13px;
  color: var(--color-text-light);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  background-color: #FFFFFF;
}

.app-footer a {
  color: var(--color-ocean-light);
  text-decoration: none;
  font-weight: 700;
}

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