@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap");

:root {
  /* Light Mode Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --accent-color: #155dfc;
  --accent-hover: #0056b3;
  --hover-bg: #dbeafe;
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.15);
  --bg-button: #ffffff;
  --bg-button1: #030213;
  --text-btn: #ffffff;
  --calc-bg: #dbeafe;
  --calc-icon: #155dfc;
  --analytics-bg: #f3e8ff;
  --analytics-icon: #9810fa;
  --book-bg: #dcfce7;
  --book-icon: #00a63e;
  --check-icon: #00a63e;
  --nav-border: #e5e7eb;
  --nav-bg: #ffffff;
  --academic-text: #155dfc;
  --performance-blue: #155dfc;
  --performance-purple: #9810fa;
  --performance-green: #00a63e;
  --performance-orange: #f97316;
  --hero-gradient1: #155dfc;
  --hero-gradient2: #9810fa;
  --profile-card: var(--bg-secondary);
  --profile-field-bg: #f8fafc;
  --profile-border: var(--border-color);
  --profile-text-soft: var(--text-secondary);
  --profile-tip-bg: #eef4ff;
  --profile-tip-border: #cfe0ff;
  --profile-tip-text: #3157a5;
  --toggle-bg: #666666;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Typography */
  --font-family-base:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 14px;
  --line-height-base: 1.6;
  --index-nav-height: clamp(3.5rem, 6vh, 4.25rem);
}

/* Dark Mode Colors */
[data-theme="dark"] {
  --bg-primary: #030712;
  --bg-secondary: #0a0a0a;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --border-color: #262626;
  --accent-color: #51a2ff;
  --accent-hover: #79b8ff;
  --hover-bg: #030712;
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.5);
  --bg-button: #262626;
  --bg-button1: #ffffff;
  --text-btn: #1a1a1a;
  --calc-bg: #1c398e;
  --calc-icon: #51a2ff;
  --analytics-bg: #59168b;
  --analytics-icon: #c27aff;
  --book-bg: #0d542b;
  --book-icon: #05df72;
  --check-icon: #05df72;
  --nav-border: #1e2939;
  --nav-bg: #101828;
  --academic-text: #51a2ff;
  --performance-blue: #51a2ff;
  --performance-purple: #c27aff;
  --performance-green: #05df72;
  --performance-orange: #fb923c;
  --hero-gradient1: #51a2ff;
  --hero-gradient2: #c27aff;
  --profile-card: #0a0a0a;
  --profile-field-bg: #202122;
  --profile-border: rgba(148, 163, 184, 0.16);
  --profile-text-soft: #b9c1cc;
  --profile-tip-bg: rgba(37, 99, 235, 0.2);
  --profile-tip-border: rgba(96, 165, 250, 0.28);
  --profile-tip-text: #bfdbfe;
  --toggle-bg: #f5f7fc;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: var(--line-height-base);
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

html::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.container {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

main {
  min-height: calc(100vh - 200px);
}

.index-nav {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  min-height: var(--index-nav-height);
  height: var(--index-nav-height);
  width: 100%;
  border-bottom: 1px solid var(--nav-border);
  padding: 0.875rem 1rem;
  background-color: var(--nav-bg);
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  min-height: 6vh;
  padding: 0.875rem 1rem;
  flex-wrap: wrap;
  gap: 0.75rem;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  height: 6vh;
  border-bottom: 1px solid var(--nav-border);
  background-color: var(--nav-bg);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-title {
  color: var(--academic-text);
  font-weight: bold;
  font-size: 1.1rem;
}

.index-nav-right {
  display: flex;
  align-items: center;
}

.index-nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-left: 10px;
  border-radius: 1rem;
}

.index-nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  padding: 8px 12px;
}

.index-nav-links.active {
  opacity: 0.8;
}

.index-nav-links a:hover {
  background: var(--hover-bg);
  color: var(--accent-color);
  border: 1px, solid, var(--hover-bg);
  border-radius: 1rem;
}

/* Hero section */

.hero,
.footer {
  padding: clamp(36px, 8vw, 52px) clamp(20px, 6vw, 28px) clamp(36px, 8vw, 48px);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero h1 {
  font-size: clamp(28px, 7vw, 38px);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 18px;
  background-clip: text;
  background: linear-gradient(
    to right,
    var(--hero-gradient1),
    var(--hero-gradient2)
  );
  color: transparent;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer h1 {
  font-size: clamp(22px, 5.5vw, 32px);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 18px;
  background-clip: text;
}

.hero p,
.footer p {
  color: var(--text-secondary);
  font-size: clamp(14px, 3.2vw, 18px);
  max-width: clamp(280px, 68vw, 760px);
  margin: 0 auto 20px;
  text-align: center;
}

/* Hero Buttons */

.hero-btns,
.footer-btns {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 10px;
  border: none;
  height: 40px;
  background-color: var(--bg-button1);
  color: var(--text-btn);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  cursor: pointer;
  opacity: 0.9;
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-button);
  color: var(--text-primary);
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  cursor: pointer;
  height: 40px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Features Landing Page */

.features {
  padding: 10px clamp(12px, 4vw, 16px) 0px;
}

.features-header {
  text-align: center;
  padding: 0px 20px 28px;
}

.features-header h2 {
  font-size: clamp(18px, 4vw, 24px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

.card1,
.card2,
.card3 {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  padding: 22px 20px;
  margin-bottom: 14px;
  position: relative;
  overflow: hidden;
}

.card1:hover {
  border-color: #155dfc;
}

.card2:hover {
  border-color: #9810fa;
}

.card3:hover {
  border-color: #00a63e;
}

.card h3 {
  font-size: clamp(15px, 3.2vw, 18px);
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.card p {
  font-size: clamp(12.5px, 3vw, 15px);
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: clamp(12.5px, 3vw, 15px);
  color: var(--text-secondary);
}

.check-icon {
  color: var(--check-icon);
}

.calc-bg {
  height: 48px;
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--calc-bg);
  border-radius: 10px;
  margin-bottom: 5px;
}

.calc-icon {
  width: 28px;
  height: 28px;
  color: var(--calc-icon);
}

.analytics-bg {
  height: 48px;
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--analytics-bg);
  border-radius: 10px;
  margin-bottom: 5px;
}

.analytics-icon {
  width: 28px;
  height: 28px;
  color: var(--analytics-icon);
}

.book-bg {
  height: 48px;
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--book-bg);
  border-radius: 10px;
  margin-bottom: 5px;
}

.book-icon {
  width: 28px;
  height: 28px;
  color: var(--book-icon);
}

/* End of landing page */

/* Start of login page */

.login-container {
  min-height: calc(100vh - var(--index-nav-height));
  min-height: calc(100svh - var(--index-nav-height));
  min-height: calc(100dvh - var(--index-nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--bg-primary);
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 40px 28px;
  border-radius: 10px;
  box-shadow: var(--shadow-light);
}

.login-card h1 {
  text-align: center;
  margin-bottom: 10px;
  font-size: 28px;
}

.login-card p {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 30px;
  font-size: 14px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-primary);
  font-size: 14px;
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition:
    border-color 0.3s ease,
    box-shadow 0.3s ease;
}

.password-field {
  position: relative;
}

.password-field input {
  padding-right: 44px;
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.password-toggle:hover {
  color: var(--text-primary);
  background: var(--hover-bg);
}

.password-toggle:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 1px;
}

.password-toggle ion-icon {
  font-size: 18px;
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.1);
}

.login-button {
  width: 100%;
  padding: 14px;
  background: var(--bg-button1);
  color: var(--text-btn);
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease;
  font-size: 14px;
}

.login-button:hover {
  opacity: 0.9;
}

.login-button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.error-message {
  padding: 12px;
  border-radius: 4px;
  margin-bottom: 20px;
  font-size: 14px;
  display: none;
}

.error-message.error {
  background: #fee;
  color: #c33;
  border: 1px solid #fcc;
}

.error-message.success {
  background: #efe;
  color: #3c3;
  border: 1px solid #cfc;
}

.signup-link {
  text-align: center;
  margin-top: 20px;
  color: var(--text-secondary);
  font-size: 14px;
}

.signup-link a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
}

.signup-link a:hover {
  text-decoration: underline;
}

/* ==========================================
   SIGNUP STYLES
   ========================================== */

.signup-container {
  min-height: calc(100vh - var(--index-nav-height));
  min-height: calc(100svh - var(--index-nav-height));
  min-height: calc(100dvh - var(--index-nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--bg-primary);
}

.signup-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-secondary);
  padding: 40px 28px;
  border-radius: 10px;
  box-shadow: var(--shadow-light);
  border: 1px solid var(--border-color);
}

.signup-card h1 {
  text-align: center;
  margin-bottom: 10px;
  font-size: 24px;
  font-weight: 600;
}

.signup-card p {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 30px;
  font-size: 14px;
}

.password-match {
  font-size: 12px;
  margin-top: 5px;
  height: 16px;
  color: var(--text-secondary);
}

.signup-button {
  width: 100%;
  padding: 14px;
  background: var(--bg-button1);
  color: var(--text-btn);
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.3s ease;
  font-size: 14px;
}

.signup-button:hover {
  opacity: 0.9;
}

.signup-button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.login-link {
  text-align: center;
  margin-top: 20px;
  color: var(--text-secondary);
  font-size: 14px;
}

.login-link a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
}

.login-link a:hover {
  text-decoration: underline;
}

@media (min-width: 768px) {
  /* Tablet and up */
  .login-card {
    max-width: 480px;
    padding: 50px 40px;
  }

  .login-card h1 {
    font-size: 32px;
    margin-bottom: 15px;
  }

  .login-card p {
    font-size: 15px;
    margin-bottom: 40px;
  }

  .signup-card {
    max-width: 480px;
    padding: 50px 40px;
  }

  .signup-card h1 {
    font-size: 28px;
    margin-bottom: 15px;
  }

  .signup-card p {
    font-size: 15px;
    margin-bottom: 40px;
  }

  .form-group {
    margin-bottom: 24px;
  }

  .form-group input {
    padding: 14px;
    font-size: 15px;
  }

  .cards {
    display: flex;
    flex-direction: row;
    gap: clamp(8px, 3vw, 14px);
  }
}

@media (min-width: 1024px) {
  /* Desktop and up */

  .cards {
    max-width: 1100px;
  }

  .cards-container {
    display: flex;
    justify-content: center;
  }
}

/* Calculator page */

.calculator-page .nav-links > a:first-child {
  color: var(--text-primary);
}

.calculator-page .nav-links > a[href="calculator.html"] {
  color: var(--accent-color);
}

.calculator-layout {
  width: min(100% - 1.5rem, 75rem);
  margin: 0 auto;
  padding: 1.25rem 0 2rem;
}

.calculator-header {
  margin: 1rem;
}

.calculator-header h1 {
  font-size: clamp(1.5rem, 4vw, 1.9rem);
  line-height: 1.15;
}

.calculator-header p {
  margin-top: 0.35rem;
  color: var(--text-secondary);
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1rem;
}

.calculator-main-card,
.calculator-result-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  box-shadow: var(--shadow-light);
}

.calculator-main-card {
  padding: 1rem;
}

.calculator-main-card h2 {
  font-size: 1rem;
  margin-bottom: 0.85rem;
}

.calc-type-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.calc-type-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  cursor: pointer;
}

.calc-type-option span {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.calc-type-option small {
  color: var(--text-secondary);
}

.calc-courses-card {
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 0.9rem;
}

.calc-courses-head p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.calc-term-row {
  margin-top: 0.8rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
}

.calc-term-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.calc-term-field select,
.calc-term-field input {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 0.6rem;
  padding: 0.62rem 0.7rem;
  color: var(--text-primary);
  background: var(--bg-primary);
}

.calc-term-field select:focus,
.calc-term-field input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.calc-course-rows {
  margin-top: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.calc-course-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
  padding: 0.65rem;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
}

.calc-course-row label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.calc-course-row input {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 0.6rem;
  padding: 0.62rem 0.7rem;
  color: var(--text-primary);
  background: var(--bg-primary);
}

.calc-course-row select {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 0.6rem;
  padding: 0.62rem 0.7rem;
  color: var(--text-primary);
  background: var(--bg-primary);
}

.calc-course-row input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.calc-course-row select:focus {
  outline: none;
  border-color: var(--accent-color);
}

.calc-course-row .is-disabled {
  opacity: 0.55;
}

.remove-course {
  justify-self: end;
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.remove-course ion-icon {
  font-size: 1rem;
}

.calc-actions {
  margin-top: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.calc-actions .btn-primary,
.calc-actions .btn-secondary {
  justify-content: center;
}

.calc-feedback {
  margin-top: 0.75rem;
  font-size: 0.92rem;
  min-height: 1.3rem;
}

.calc-feedback.success {
  color: var(--book-icon);
}

.calc-feedback.error {
  color: var(--accent-color);
}

.calculator-result-card {
  padding: 1rem;
  height: fit-content;
}

.calculator-result-card p {
  color: var(--text-secondary);
  margin: 0.2rem 0 0.5rem;
}

.calculator-result-card h2 {
  font-size: clamp(1.7rem, 6vw, 2.2rem);
  line-height: 1.1;
}

.result-empty {
  margin-top: 1rem;
  border: 1px dashed var(--border-color);
  border-radius: 0.75rem;
  padding: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.result-empty ion-icon {
  font-size: 1.2rem;
}

.hidden {
  display: none;
}

@media (min-width: 768px) {
  .calc-term-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .calc-type-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .calc-course-row {
    grid-template-columns:
      minmax(180px, 1.2fr) minmax(140px, 1fr) repeat(2, minmax(104px, 0.65fr))
      auto;
    align-items: end;
  }

  .calc-actions {
    flex-direction: row;
    justify-content: flex-end;
  }
}

@media (min-width: 992px) {
  .calculator-grid {
    grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
    align-items: start;
  }
}

/* Performance page */

.performance-page .nav-links > a:first-child {
  color: var(--text-primary);
}

.performance-page .nav-links > a[href="performance.html"] {
  color: var(--accent-color);
}

.performance-container {
  width: min(100% - 1.5rem, 75rem);
  margin: 0 auto;
  padding: 1rem 0 1.75rem;
}

.performance-hero {
  margin: 1rem;
}

.performance-hero h1 {
  font-size: clamp(1.65rem, 5.5vw, 2.2rem);
  line-height: 1.15;
}

.performance-hero p {
  margin-top: 0.35rem;
  color: var(--text-secondary);
}

.performance-metrics {
  margin: 1rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.metric-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.95rem;
  box-shadow: var(--shadow-light);
  padding: 0.95rem 1rem;
}

.metric-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.metric-card h2 {
  margin-top: 0.25rem;
  font-size: clamp(1.5rem, 5vw, 1.9rem);
  line-height: 1.1;
}

.metric-note {
  margin-top: 0.25rem;
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.metric-note-danger {
  color: var(--performance-orange);
}

#strong-subjects-count {
  color: var(--performance-green);
}

#attention-count {
  color: var(--performance-orange);
}

.performance-tabs {
  margin: 1rem;
}

.tab-list {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--bg-secondary);
  padding: 0.2rem;
}

.tab-button {
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-weight: 600;
  font-size: 0.82rem;
  padding: 0.38rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
}

.tab-button.active {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.tab-panels {
  margin-top: 1rem;
}

.panel-filter-row {
  margin-top: 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.panel-filter-label {
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 600;
}

.panel-filter {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 0.1rem;
}

.panel-filter-list {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--bg-secondary);
  padding: 0.2rem;
  min-width: max-content;
}

.panel-filter-button {
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-weight: 600;
  font-size: 0.78rem;
  padding: 0.34rem 0.68rem;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
}

.panel-filter-button.active {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.chart-card,
.insight-card,
.recommendations-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  box-shadow: var(--shadow-light);
  padding: 1rem;
}

.chart-heading h3,
.insight-title-row h3 {
  font-size: 0.98rem;
}

.chart-heading p {
  margin-top: 0.2rem;
  color: var(--text-secondary);
  font-size: 0.86rem;
}

.chart-shell {
  margin-top: 0.75rem;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 0.25rem;
}

#panel-trend .chart-shell {
  margin-top: 0.55rem;
}

#panel-skills .chart-shell {
  padding: 0.35rem 0 0.45rem;
  margin-top: 0.35rem;
  display: flex;
  justify-content: center;
}

.line-chart,
.bar-chart,
.radar-chart {
  width: 100%;
  overflow: visible;
}

.line-chart svg {
  width: 100%;
  height: auto;
  display: block;
}

.bar-chart svg {
  width: auto;
  min-width: 100%;
  height: auto;
  display: block;
}

.radar-chart {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  min-height: 20rem;
}

.radar-chart svg {
  width: min(32rem, 100%);
  height: auto;
  display: block;
}

.chart-legend {
  margin-top: 0.4rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-secondary);
  font-size: 0.76rem;
  margin-left: auto;
}

.legend-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  display: inline-block;
}

.legend-blue {
  background: var(--performance-blue);
}

.legend-purple {
  background: var(--performance-purple);
}

.chart-grid-line {
  stroke: var(--border-color);
  stroke-width: 1;
}

.chart-grid-line-vertical {
  stroke-dasharray: 3 3;
}

.chart-axis-label {
  fill: var(--text-secondary);
  font-size: 11px;
}

.chart-point-label {
  fill: var(--text-primary);
  font-size: 11px;
  font-weight: 600;
}

.course-axis-label {
  font-size: 9px;
  letter-spacing: -0.01em;
}

.radar-axis-label {
  font-size: 16px;
  fill: color-mix(in srgb, var(--text-secondary) 88%, transparent);
}

.radar-ring {
  fill: transparent;
  stroke: var(--border-color);
  stroke-width: 1;
}

.radar-axis {
  stroke: var(--border-color);
  stroke-width: 1;
}

.radar-shape {
  fill: color-mix(in srgb, var(--performance-green) 20%, transparent);
  stroke: var(--performance-green);
  stroke-width: 2;
}

.performance-grid,
.recommendations-section {
  margin: 1rem;
}

.performance-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.insight-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.7rem;
}

.insight-pill {
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
}

.insight-pill-green {
  color: var(--performance-green);
}

.insight-pill-orange {
  color: var(--performance-orange);
}

.course-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.course-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-primary);
}

.course-row h4 {
  font-size: 0.95rem;
}

.course-row p {
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.course-score {
  min-width: 2.15rem;
  height: 2.15rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.83rem;
  font-weight: 700;
  border: 1px solid var(--border-color);
}

.course-score.good {
  color: var(--performance-green);
}

.course-score.warn {
  color: var(--performance-orange);
}

.recommendations-list {
  margin-top: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.recommendation-item {
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-primary);
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.recommendation-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 0.65rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  flex-shrink: 0;
}

.recommendation-item h4 {
  font-size: 0.92rem;
}

.recommendation-item p {
  margin-top: 0.15rem;
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.recommendation-blue .recommendation-icon {
  background: var(--calc-bg);
  color: var(--performance-blue);
}

.recommendation-orange .recommendation-icon {
  background: color-mix(
    in srgb,
    var(--performance-orange) 18%,
    var(--bg-primary)
  );
  color: var(--performance-orange);
}

.recommendation-green .recommendation-icon {
  background: var(--book-bg);
  color: var(--performance-green);
}

@media (min-width: 48rem) {
  .performance-container {
    padding: 1rem 0 1.6rem;
  }

  .performance-hero,
  .performance-metrics,
  .performance-tabs,
  .performance-grid,
  .recommendations-section {
    margin-left: 1rem;
    margin-right: 1rem;
  }

  .performance-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .panel-filter-row {
    flex-direction: row;
    align-items: center;
    gap: 0.6rem;
  }

  .chart-card,
  .insight-card,
  .recommendations-card {
    padding: 1.1rem;
  }

  .chart-heading h3,
  .insight-title-row h3 {
    font-size: 1rem;
  }

  .course-axis-label {
    font-size: 10px;
  }

  .radar-axis-label {
    font-size: 16px;
  }

  #panel-skills .chart-shell {
    padding: 0.4rem 0 0.5rem;
    margin-top: 0.4rem;
  }
}

@media (min-width: 64rem) {
  .performance-container {
    padding: 1rem 0 1.5rem;
  }

  .performance-hero,
  .performance-metrics,
  .performance-tabs,
  .performance-grid,
  .recommendations-section {
    margin-left: 1rem;
    margin-right: 1rem;
  }

  .performance-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .performance-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chart-card,
  .insight-card,
  .recommendations-card {
    padding: 1rem;
  }
}

/* Study tracker page */

.study-page .nav-links > a:first-child {
  color: var(--text-primary);
}

.study-page .nav-links > a[href="study.html"] {
  color: var(--accent-color);
}

.study-layout {
  width: min(100% - 1.5rem, 75rem);
  margin: 0 auto;
  padding: 1.25rem 0 2rem;
}

.study-header {
  margin: 0 1rem 1rem;
}

.study-header h1 {
  font-size: clamp(1.65rem, 5.5vw, 2.2rem);
  line-height: 1.15;
}

.study-header p {
  margin-top: 0.35rem;
  color: var(--text-secondary);
}

.study-summary-grid {
  margin: 0 1rem 1rem;
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1fr;
}

.study-summary-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.9rem;
  padding: 0.95rem 1rem;
}

.study-summary-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.study-summary-card h2 {
  margin-top: 0.45rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 1.9rem;
  line-height: 1;
}

.summary-icon {
  font-size: 1.35rem;
}

.icon-orange {
  color: var(--accent-color);
}

.study-tabs {
  margin: 0 1rem 0.95rem;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  border-radius: 999px;
  padding: 0.2rem;
}

.study-tab {
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-weight: 600;
  font-size: 0.82rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  cursor: pointer;
}

.study-tab.active {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.study-panel,
.study-goals-card {
  margin: 0 1rem 1rem;
}

.study-card,
.study-goals-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1rem;
}

.study-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.study-card-head .btn-primary {
  height: 2rem;
  font-size: 0.78rem;
  padding: 0.35rem 0.65rem;
  border-radius: 0.5rem;
  white-space: nowrap;
}

.study-card h3,
.study-goals-card h3 {
  font-size: 1.1rem;
}

.section-subtext {
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
}

.reading-list,
.sessions-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.reading-item,
.session-item {
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 0.85rem;
  background: var(--bg-primary);
}

.reading-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.6rem;
}

.reading-row h4,
.session-row h4 {
  font-size: 1rem;
  line-height: 1.3;
}

.item-meta {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  white-space: nowrap;
}

.status-in-progress {
  color: var(--accent-color);
}

.status-completed {
  color: var(--book-icon);
}

.status-not-started {
  color: var(--text-secondary);
}

.progress-wrap {
  margin-top: 0.65rem;
}

.progress-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.83rem;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.progress-track,
.goal-progress-track {
  width: 100%;
  height: 0.42rem;
  border-radius: 999px;
  background: var(--border-color);
  overflow: hidden;
}

.progress-fill,
.goal-progress-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--bg-button1);
  width: 0%;
}

.reading-actions {
  margin-top: 0.65rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.reading-action-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.reading-actions input {
  width: 5rem;
  padding: 0.35rem 0.45rem;
  border-radius: 0.4rem;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.reading-actions input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.reading-actions button {
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: 0.45rem;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
}

.reading-actions button:hover {
  border-color: var(--accent-color);
}

.session-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.session-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.session-icon {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 0.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--analytics-bg);
  color: var(--analytics-icon);
  flex-shrink: 0;
}

.session-date {
  color: var(--text-secondary);
  font-size: 0.82rem;
  white-space: nowrap;
}

.goal-row {
  margin-top: 0.85rem;
}

.goal-config-form {
  margin-top: 0.25rem;
}

.goal-config-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
}

.goal-config-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.goal-config-field span {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.goal-config-field input {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 0.55rem;
  padding: 0.58rem 0.65rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  font: inherit;
}

.goal-config-field input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.goal-config-actions {
  margin-top: 0.65rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.goal-config-actions .btn-primary,
.goal-config-actions .btn-secondary {
  height: 2rem;
  font-size: 0.8rem;
  border-radius: 0.5rem;
}

.goal-label {
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.83rem;
  color: var(--text-secondary);
}

.goal-label span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--text-primary);
  font-weight: 500;
}

.empty-state {
  border: 1px dashed var(--border-color);
  border-radius: 0.75rem;
  padding: 0.8rem;
  color: var(--text-secondary);
}

.study-modal[hidden] {
  display: none;
}

.study-modal {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.study-modal-backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg-button1) 38%, transparent);
}

.study-modal-dialog {
  position: relative;
  z-index: 1;
  width: min(100%, 34rem);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  box-shadow: var(--shadow-medium);
  padding: 1rem;
}

.study-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.study-modal-head h3 {
  font-size: 1.05rem;
}

.study-modal-close {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.study-modal-close:hover {
  border-color: var(--accent-color);
}

.study-modal-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.study-form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
}

.study-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.study-field span {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.study-field input,
.study-field textarea {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 0.55rem;
  padding: 0.58rem 0.65rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  font: inherit;
}

.study-field input:focus,
.study-field textarea:focus {
  outline: none;
  border-color: var(--accent-color);
}

.study-form-feedback {
  min-height: 1.2rem;
  font-size: 0.82rem;
}

.study-form-feedback.error {
  color: var(--performance-orange);
}

.study-form-feedback.success {
  color: var(--book-icon);
}

.study-modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.6rem;
}

.study-modal-actions .btn-primary,
.study-modal-actions .btn-secondary {
  height: 2.1rem;
  font-size: 0.82rem;
  border-radius: 0.5rem;
}

/* Logout Confirmation Dialog */

.logout-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.logout-modal-backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg-button1) 38%, transparent);
  cursor: pointer;
}

.logout-modal-dialog {
  position: relative;
  z-index: 1;
  width: min(100%, 28rem);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  box-shadow: var(--shadow-medium);
  padding: 1.5rem;
}

.logout-modal-dialog h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.logout-modal-dialog p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.logout-modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

.logout-modal-actions button {
  height: 2.2rem;
  font-size: 0.9rem;
  border-radius: 0.6rem;
}

@media (min-width: 48rem) {
  .study-summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .study-card,
  .study-goals-card {
    padding: 1.15rem;
  }

  .reading-actions {
    justify-content: flex-start;
  }

  .reading-action-group {
    flex-wrap: nowrap;
  }

  .study-form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .goal-config-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64rem) {
  .study-summary-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ==========================================
   PROFILE PAGE
   ========================================== */

.profile-page {
  background-color: var(--bg-primary);
}

.profile-page .container {
  width: min(100% - 1.5rem, 68rem);
  margin: 0 auto;
  padding: 1rem 0 2.5rem;
}

.profile-page .nav-links > a:first-child {
  color: var(--text-primary);
}

.profile-page .nav-right a[aria-current="page"] {
  color: var(--accent-color);
}

.profile-hero {
  margin-bottom: 1.25rem;
}

.profile-hero h1 {
  font-size: clamp(1.8rem, 1.55rem + 1.1vw, 2.3rem);
  line-height: 1.08;
  margin-bottom: 0.35rem;
}

.profile-hero p {
  color: var(--profile-text-soft);
  font-size: clamp(0.98rem, 0.92rem + 0.25vw, 1.08rem);
}

.profile-section {
  display: grid;
  gap: 1rem;
}

.profile-card {
  background: var(--profile-card);
  border: 1px solid var(--profile-border);
  border-radius: 1rem;
  box-shadow: var(--shadow-light);
  padding: 1rem;
}

.profile-card-heading {
  margin-bottom: 1rem;
}

.profile-card-heading h2 {
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.15rem);
  margin-bottom: 0.25rem;
}

.profile-card-heading p {
  color: var(--profile-text-soft);
  font-size: clamp(0.88rem, 0.84rem + 0.2vw, 0.96rem);
}

.profile-fields {
  display: grid;
  gap: 0.9rem;
}

.profile-field label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.45rem;
  font-size: clamp(0.88rem, 0.84rem + 0.2vw, 0.95rem);
  font-weight: 600;
}

.profile-field-value {
  min-height: 2.9rem;
  display: flex;
  align-items: center;
  border-radius: 0.7rem;
  background: var(--profile-field-bg);
  border: 1px solid var(--profile-border);
  color: var(--profile-text-soft);
  padding: 0.8rem 0.9rem;
  font-size: clamp(0.92rem, 0.88rem + 0.22vw, 1rem);
}

.appearance-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.appearance-title {
  display: flex;
  align-items: first baseline;
  gap: 0.65rem;
}

.appearance-title ion-icon {
  display: block;
  font-size: 1rem;
  line-height: 1;
  margin-top: 0;
  color: var(--accent-color);
}

.appearance-title > div {
  display: grid;
  gap: 0.1rem;
}

.appearance-title h3 {
  font-size: clamp(0.96rem, 0.9rem + 0.25vw, 1.04rem);
  margin-bottom: 0.12rem;
  transform: translateY(-0.04rem);
}

.appearance-title p {
  color: var(--profile-text-soft);
  font-size: clamp(0.84rem, 0.8rem + 0.18vw, 0.92rem);
}

.appearance-toggle {
  position: relative;
  width: 3rem;
  height: 1.7rem;
  flex-shrink: 0;
  border: 0;
  border-radius: 999px;
  background: #d1d5db;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.appearance-toggle-track,
.appearance-toggle-thumb {
  pointer-events: none;
}

.appearance-toggle-thumb {
  position: absolute;
  top: 0.2rem;
  left: 0.22rem;
  width: 1.3rem;
  height: 1.3rem;
  border-radius: 50%;
  background: var(--text-btn);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.2);
  transition: transform 0.2s ease;
}

.appearance-toggle.is-on {
  background: var(--toggle-bg);
}

.appearance-toggle.is-on .appearance-toggle-thumb {
  transform: translateX(1.24rem);
}

.profile-tip {
  border: 1px solid var(--profile-tip-border);
  background: var(--profile-tip-bg);
  color: var(--profile-tip-text);
  border-radius: 0.75rem;
  padding: 0.85rem 0.95rem;
  font-size: clamp(0.84rem, 0.8rem + 0.18vw, 0.92rem);
}

.profile-tip span {
  font-weight: 700;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.stat-item {
  display: grid;
  gap: 0.2rem;
}

.stat-item span {
  color: var(--profile-text-soft);
  font-size: clamp(0.84rem, 0.8rem + 0.18vw, 0.92rem);
}

.stat-item strong {
  font-size: clamp(1rem, 0.96rem + 0.28vw, 1.12rem);
  font-weight: 700;
}

@media (min-width: 48rem) {
  .profile-page .container {
    width: min(100% - 2rem, 68rem);
    padding-top: 1.25rem;
  }

  .profile-card {
    padding: 1.25rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.2rem 2rem;
  }
}

@media (min-width: 57rem) {
  .profile-card {
    padding: 1.35rem;
  }
}