:root {
  --bg-color-start: #0f0c29;
  --bg-color-mid: #302b63;
  --bg-color-end: #24243e;
  --text-primary: #ffffff;
  --text-secondary: #c0c0d0;
  --accent-primary: #8e44ad;
  --accent-secondary: #3498db;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --shadow-color: rgba(0, 0, 0, 0.2);
  --navbar-height: 70px;
}

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

body {
  font-family: "Poppins", sans-serif;
  color: var(--text-primary);
  background: linear-gradient(
    135deg,
    var(--bg-color-start),
    var(--bg-color-mid),
    var(--bg-color-end)
  );
  background-size: 400% 400%;
  animation: gradientBG 15s ease infinite;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

@keyframes gradientBG {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--navbar-height);
  background: rgba(15, 12, 41, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 1.5em;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo i {
  color: var(--accent-secondary);
}

.nav-links ul {
  list-style: none;
  display: flex;
  gap: 30px;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}
.nav-links a:hover {
  color: var(--accent-secondary);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.8em;
  cursor: pointer;
}

.main-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
  padding-top: var(--navbar-height);
  padding-bottom: 100px;
  width: 100%;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  width: 100%;
  max-width: 900px;
  transition: margin-bottom 0.4s ease;
  margin-bottom: 20px;
}

.result-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  padding: 30px;
  text-align: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px 0 var(--shadow-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.result-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 16px 40px 0 rgba(0, 0, 0, 0.3);
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 1.2em;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.result-value {
  font-size: clamp(3em, 10vw, 4.5em);
  font-weight: 600;
  line-height: 1;
}
.result-value small {
  font-size: 0.3em;
  font-weight: 300;
  margin-left: 5px;
  color: var(--text-secondary);
}

.chart-container {
    width: 100%;
    max-width: 900px;
    height: 0;
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.5s ease-in-out;
    margin-bottom: 20px;
    pointer-events: none; 
}

.chart-container.active {
    height: 250px;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto; 
}



.start-container {
    margin-bottom: 20px;
}

#startButton {
    background-color: rgba(0, 0, 0, 0.2);
    border: 3px solid var(--text-secondary);
    width: 150px;
    height: 150px;
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 2.5em;
    font-weight: 700;
    letter-spacing: 2px;
    cursor: pointer;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
}

#startButton:hover {
    background-color: rgba(52, 152, 219, 0.2);
    color: #ffffff;
    border-color: var(--accent-secondary);
    box-shadow: 0 0 30px rgba(52, 152, 219, 0.5);
    transform: scale(1.05);
}

#startButton:disabled {
    background: rgba(0, 0, 0, 0.2);
    border-color: #555;
    color: #555;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

#startButton.testing {
    cursor: not-allowed;
    animation: testing-pulse 2s infinite;
}

@keyframes testing-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(52, 152, 219, 0.7);
    }
    70% {
        box-shadow: 0 0 0 20px rgba(52, 152, 219, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(52, 152, 219, 0);
    }
}



.post-test-actions {
  display: flex;
  gap: 20px;
  transition: opacity 0.5s ease;
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--accent-secondary);
  color: var(--accent-secondary);
  padding: 10px 25px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
  font-size: 1em;
}

.btn-secondary:hover {
  background: var(--accent-secondary);
  color: white;
  box-shadow: 0 0 15px rgba(52, 152, 219, 0.5);
}

.btn-secondary i {
  margin-right: 8px;
}

.hidden {
  display: none !important;  
  opacity: 0;
  visibility: hidden;
  height: 0;
  margin: 0 !important;
  padding: 0 !important;
}

.footer-bar {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 15px 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-top: 1px solid var(--glass-border);
    margin-top: auto; 
}

.info-group {
  display: flex;
  gap: 25px;
  flex-wrap: wrap;
}
.info-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}


@media (max-width: 960px) {
  .results-grid {
    max-width: 700px;
    gap: 20px;
  }
}

@media (max-width: 820px) {
  .nav-links {
    position: fixed;
    top: var(--navbar-height);
    right: -100%;
    width: 250px;
    height: calc(100vh - var(--navbar-height));
    background: rgba(15, 12, 41, 0.8);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    flex-direction: column;
    align-items: center;
    padding-top: 40px;
    transition: right 0.4s ease-in-out;
  }

  .nav-links.active {
    right: 0;
  }
  .nav-links ul {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }
  .nav-links li {
    width: 100%;
    text-align: center;
  }
  .nav-links a {
    display: block;
    padding: 20px;
    font-size: 1.2em;
  }
  .hamburger {
    display: block;
  }
}

@media (max-width: 768px) {
  .results-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    width: 100%;
    max-width: 350px;
  }
  .chart-container.active {
    height: 200px;
  }
  .result-card {
    padding: 20px;
  }
  #startButton {
    padding: 15px 40px;
    font-size: 1.2em;
  }
  .footer-bar {
    position: relative;
  }
  .main-content {
    padding-bottom: 20px;
    padding-top: calc(var(--navbar-height) + 20px);
  }
  .info-group {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .results-grid {
    max-width: 100%;
    gap: 15px;
  }
  .result-header {
    font-size: 1em;
  }
  .footer-bar {
    font-size: 0.9em;
  }
  .post-test-actions {
    flex-direction: column;
  }
}

.analysis-section-single {
    width: 100%;
    max-width: 900px;
    margin-top: 20px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 15px 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.5s ease;
}

.analysis-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}


.analysis-item:not(:last-child) {
    border-bottom: 1px solid var(--glass-border);
}

.analysis-label {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1em;
    color: var(--text-secondary);
}

.analysis-label i {
    font-size: 1.5em;
    color: var(--accent-secondary);
    width: 25px; 
    text-align: center;
}

.analysis-section-single strong {
    font-size: 1.5em;
    font-weight: 600;
    color: var(--text-primary);
}


@media (max-width: 768px) {
    .analysis-section-single {
        padding: 10px 20px;
    }
    .analysis-label {
        font-size: 0.9em;
    }
    .analysis-section-single strong {
        font-size: 1.2em;
    }
}

@media (max-height: 500px) and (orientation: landscape) {
  .main-content {
    justify-content: flex-start;
    padding-top: calc(var(--navbar-height) + 20px);
    padding-bottom: 80px;
  }
  .results-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
  }
  .chart-container.active {
    height: 150px;
  }
  .result-card {
    padding: 15px;
  }
  .result-header {
    font-size: 0.9em;
    margin-bottom: 10px;
  }
  #startButton {
    padding: 12px 30px;
    font-size: 1.1em;
  }
  .footer-bar {
    padding: 10px 20px;
  }
}