/*
================================================
TutorBoost Main Stylesheet
(Your original styles + new component styles)
================================================
*/

/* --- Your Original Variables & Global Styles --- */
:root {
  --deep: #181b21;
  --bg: #f8fafd;
  --glass: rgba(253,252,253,0.95);
  --soft-shadow: 0 10px 38px 0 rgba(255,255,255,0.2), 0 1px 20px rgba(11,21,49,0.1);
  --brand-main: #0446b1;
  --brand-text: #0d2140;
  --mono: 'JetBrains Mono', monospace;
  --primary: #f7ba12;
  --accent1: #39b9e9;
  --success: #28a745;
  --error: #dc3545;
  --border-radius: 1rem;
  --transition: all 0.3s ease;
  /* ADDED: A consistent border color variable for new components */
  --border-color: #e0e6f8; 
}

* {
  box-sizing: border-box;
}

html, body {
  background: var(--bg);
  color: var(--brand-text);
  font-family: 'Inter', Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

body {
  min-height: 100vh;
  font-size: 16px;
}

/* --- Your Original Header & Typography Styles --- */
header {
  background: linear-gradient(135deg, #ffffff 0%, #f0f7ff 50%, #ffe8a2 100%);
  padding: 2rem 1rem;
  text-align: center;
  margin-bottom: 2rem;
  box-shadow: var(--soft-shadow);
}
.brand-logo {
  width: 60px;
  height: 60px;
  vertical-align: -18%;
  margin-bottom: 0.5rem;
}
h1 {
  font-family: var(--mono);
  font-weight: 700;
  color: var(--brand-main);
  font-size: 2.5rem;
  margin: 0.5rem 0;
  letter-spacing: -0.02em;
}
h2 {
  color: #283c56;
  font-size: 1.35rem;
  font-weight: 400;
  margin: 0.5rem 0 1rem 0;
}
h3, h4 { color: var(--brand-main); }

/* --- Your Original Navigation --- */
nav {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
nav a {
  color: var(--primary);
  font-weight: 500;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  transition: var(--transition);
}
nav a:hover {
  color: var(--accent1);
  background: rgba(255,255,255,0.3);
}

/* --- Your Original Buttons --- */
.cta-btn, .cta-btn:visited {
  background: linear-gradient(90deg, #ffe296, #f6c12c 60%);
  color: #2f2906;
  border: none;
  padding: 0.85rem 2.2rem;
  font-weight: 700;
  font-size: 1.13rem;
  border-radius: 2rem;
  text-decoration: none;
  box-shadow: 0 2px 10px rgba(255, 214, 49, 0.3);
  cursor: pointer;
  transition: var(--transition);
  display: inline-block;
}
.cta-btn:hover, .cta-btn:focus {
  background: linear-gradient(90deg, #ffd644, #fac815 60%, #f5d341 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 214, 49, 0.4);
}
.cta-btn:disabled {
    background: #ccc;
    color: #666;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
.btn-more {
  background: rgba(255,255,255,0.8);
  padding: 0.7rem 1.5rem;
  border-radius: 0.7rem;
  color: var(--brand-main);
  border: 1px solid #e5e6fe;
  text-decoration: none;
  font-weight: 700;
  transition: var(--transition);
  display: inline-block;
}
.btn-more:hover { background: var(--brand-main); color: #fff; }

/* --- Your Original Content Sections & Cards --- */
.hero-main { max-width: 800px; margin: 0 auto 3rem auto; padding: 2rem 1rem; text-align: center; }
.hero-main h1 { margin-bottom: 1rem; font-size: 2.2rem; }
.hero-msg { font-size: 1.14rem; color: #3c475a; padding: 1rem; letter-spacing: 0.02em; line-height: 1.7; }
.categories-venn-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; max-width: 1200px; margin: 2rem auto; padding: 0 1rem; }
.cat-panel { background: var(--glass); border-radius: var(--border-radius); padding: 2rem; box-shadow: var(--soft-shadow); text-align: left; transition: var(--transition); border: 1px solid rgba(255,255,255,0.2); }
.cat-panel:hover { box-shadow: 0 16px 47px rgba(244, 186, 22, 0.2), 0 3px 18px rgba(24, 49, 255, 0.1); transform: translateY(-5px) scale(1.02); }
.courses-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; max-width: 1200px; margin: 0 auto; padding: 1rem; }
.course-card { background: var(--glass); border-radius: var(--border-radius); box-shadow: var(--soft-shadow); overflow: hidden; display: flex; flex-direction: column; transition: var(--transition); border: 1px solid rgba(255,255,255,0.2); }
.course-card:hover { transform: translateY(-8px) scale(1.02); box-shadow: 0 20px 50px rgba(244, 186, 22, 0.3), 0 5px 25px rgba(24, 49, 255, 0.1); }

/* --- Your Original Forms & Messages --- */
.login-card, .signup-card, .form-panel { background: var(--glass); border-radius: var(--border-radius); box-shadow: var(--soft-shadow); max-width: 450px; margin: 2rem auto; padding: 2.5rem; border: 1px solid rgba(255,255,255,0.2); }
.form-title { text-align: center; color: var(--brand-main); font-size: 1.8rem; margin-bottom: 2rem; }
label { display: block; margin: 1rem 0 0.3rem 0; font-weight: 600; color: var(--brand-text); }
input[type=password], input[type=email], input[type=text], input[type=number], select, textarea {
  width: 100%;
  padding: 1rem;
  border-radius: 0.6rem;
  border: 2px solid #e5deb0;
  background: #f6fafb;
  color: #222;
  margin-bottom: 1rem;
  font-size: 1rem;
  transition: var(--transition);
}
input[type=password]:focus, input[type=email]:focus, input[type=text]:focus, input[type=number]:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--brand-main);
  box-shadow: 0 0 0 3px rgba(4, 70, 177, 0.1);
}
.error-message, .alert-error { background: rgba(220, 53, 69, 0.1); color: var(--error); padding: 1rem; border-radius: 0.6rem; border: 1px solid rgba(220, 53, 69, 0.3); margin-bottom: 1rem; }
.success-message, .alert-success { background: rgba(40, 167, 69, 0.1); color: var(--success); padding: 1rem; border-radius: 0.6rem; border: 1px solid rgba(40, 167, 69, 0.3); margin-bottom: 1rem; }

/* --- Your Original Footer & Scrollbar --- */
footer { margin-top: 4rem; padding: 3rem 1.5rem 1.5rem; background: linear-gradient(90deg, #fdf7ef 0%, #c6d0da 90%); font-size: 0.98rem; text-align: center; color: #222; box-shadow: 0 -2px 22px rgba(187, 187, 255, 0.04); }
.credits, .credits a { font-size: 0.93rem; color: #888; text-decoration: none; display: block; margin: 1.5rem auto 0.7rem; }
::-webkit-scrollbar { width: 14px; }
::-webkit-scrollbar-thumb { background: linear-gradient(135deg, #ffe093, #fffff7 80%); border-radius: 7px; }
::-webkit-scrollbar-track { background: #f6f0ef; }

/*
================================================
NEW & IMPROVED STYLES (Added, not replaced)
================================================
*/

/* --- Standardized Site Header for Inner Pages --- */
header.site-header {
  background: var(--bg);
  padding: 0 1rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.07);
  margin-bottom: 0;
  text-align: left;
}
.site-header .header-content { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 70px; }
.site-header .logo { font-size: 1.5rem; }
.site-header .logo img { width: 32px; height: 32px; }
.site-header nav { margin-top: 0; }
.site-header .nav-link { color: var(--brand-text); padding: 0; }
.site-header .nav-link:hover { color: var(--brand-main); background: none; }

/* --- Quiz & Lesson Page Specifics --- */
.quiz-container, .lesson-container { max-width: 800px; margin: 2rem auto; }
.quiz-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.quiz-progress-bar { width: 100%; background-color: #e9ecef; border-radius: 99px; height: 10px; overflow: hidden; margin-bottom: 2rem; }
.quiz-progress-bar-inner { height: 100%; width: 0%; background-color: var(--brand-main); transition: width 0.4s ease; border-radius: 99px; }
.quiz-question-text { font-size: 1.5rem; margin-bottom: 2rem; font-weight: 600; }
.quiz-options-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.quiz-option {
  display: block;
  background: var(--bg);
  padding: 1rem 1rem 1rem 3.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}
.quiz-option:hover { border-color: var(--brand-secondary); }
.quiz-option.selected { border-color: var(--brand-main); background-color: #e6f0ff; }
.quiz-option input { display: none; }
.quiz-option::before {
    content: '';
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    border: 2px solid #ccc;
    border-radius: 50%;
    transition: var(--transition);
}
.quiz-option.selected::before { border-color: var(--brand-main); background-color: var(--brand-main); box-shadow: inset 0 0 0 4px var(--bg); }
.quiz-option.correct { background: #d4edda; border-color: var(--success); }
.quiz-option.incorrect { background: #f8d7da; border-color: var(--error); }
.quiz-nav { margin-top: 2rem; text-align: right; }
.quiz-results { text-align: center; padding: 3rem 0; }
.activity-box { background: #f0f5ff; border: 2px solid #d9e6ff; border-radius: 1rem; padding: 1.5rem 2rem; margin-top: 2rem; }

/* --- Responsive adjustments from your original code --- */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.2rem; }
  header { padding: 1.5rem 1rem; }
  .site-header .header-content { flex-direction: row; height: auto; padding: 0.5rem 0; }
}