/* File: style.css (Code đã chỉnh sửa) */

/* === BIẾN MÀU & THIẾT LẬP CHUNG === */
:root {
  --bg: #0b1020;
  --card: #121a32;
  --card-transparent: #121a32cc;
  --text: #e6eaf2;
  --muted: #9aa4c7;
  --primary: #4f8cff;
  --primary-gradient: linear-gradient(135deg, #4f8cff, #6bdeff);
  --ring: rgba(79, 140, 255, 0.35);
  --border: #2a355f;
  --danger: #ff5c5c;
  --danger-bg: #2a1116;
  --danger-border: #5a1e28;
  --success: #00f2a1;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* === CÁC THÀNH PHẦN DÙNG CHUNG === */
h1, h2, h3 { color: var(--text); line-height: 1.3; }
.container { max-width: 1100px; margin: 0 auto; padding: 50px 20px; }
.navbar {
  background: var(--card-transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky; top: 0; z-index: 1000;
}
.navbar .logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.navbar .logo-badge {
  width: 42px; height: 42px; border-radius: 12px;
  background: var(--primary-gradient);
  display: grid; place-items: center; font-weight: 900;
  color: var(--bg); box-shadow: 0 10px 30px rgba(79, 140, 255, .25);
}
.navbar .logo-text { font-size: 1.2em; font-weight: bold; }
.navbar .nav-actions .button { padding: 8px 16px; }
.button, button {
  appearance: none; border: 0; cursor: pointer; padding: 12px 20px;
  border-radius: 12px; font-weight: 600; color: var(--bg);
  background: var(--primary-gradient);
  box-shadow: 0 8px 25px rgba(79, 140, 255, .25);
  transition: all .2s ease;
  text-decoration: none;
}
.button:hover, button:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(79, 140, 255, .35); }
.button.secondary { background: #0e1530; color: var(--text); border: 1px solid var(--border); box-shadow: none; }
.button.secondary:hover { background: #121a32; border-color: var(--primary); }
.button.danger, .btn-danger { background: var(--danger); color: var(--text); box-shadow: none; }
.button.danger:hover, .btn-danger:hover { background: #e04a4a; transform: translateY(-2px); box-shadow: 0 12px 30px rgba(255, 92, 92, .35); }
.button.success, .btn-success { background: var(--success); color: var(--bg); box-shadow: none; }
.button.success:hover, .btn-success:hover { background: #00e090; transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0, 242, 161, .35); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 25px;
  box-shadow: 0 10px 40px rgba(0,0,0,.35);
  margin-bottom: 20px;
}
.muted { color: var(--muted); }
table { width: 100%; border-collapse: collapse; }
thead tr th {
  text-align: left; font-size: 13px; font-weight: 600; color: var(--muted);
  padding: 10px 15px; border-bottom: 1px solid var(--border);
}
tbody tr td { padding: 15px; border-bottom: 1px solid var(--border); }
tbody tr:last-child td { border-bottom: none; }
.input {
  width: 100%; padding: 12px 14px; border-radius: 12px; outline: none; background: #0e1530; color: var(--text);
  border: 1px solid var(--border); box-shadow: 0 0 0 0 var(--ring); transition: .15s;
}
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px var(--ring); background: #0b1330; }

/* === MODAL ĐĂNG NHẬP / ĐĂNG KÝ === */
.modal { display: none; position: fixed; inset: 0; z-index: 9999; justify-content: center; align-items: center; padding: 20px; background: rgba(10,10,14,.55); backdrop-filter: blur(5px); }
.modal-content { background: var(--card); border: 1px solid var(--border); border-radius: 16px; max-width: 420px; width: 100%; position: relative; box-shadow: 0 10px 40px rgba(0,0,0,.35); padding: 20px; }
.modal-close { position: absolute; top: 10px; right: 15px; background: none; border: none; font-size: 1.8em; cursor: pointer; color: var(--muted); }
.auth-tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.auth-tab-link { padding: 10px 20px; cursor: pointer; border: none; background: none; font-size: 1em; color: var(--muted); }
.auth-tab-link.active { font-weight: bold; color: var(--primary); border-bottom: 3px solid var(--primary); }
.auth-form { display: none; }
.auth-form.active { display: block; }
.form-group { margin-bottom: 15px; }
.form-group label, .label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 13px; color: var(--muted); }
.form-group input, .input {
  width: 100%; padding: 12px 14px; border-radius: 12px; outline: none; background: #0e1530; color: var(--text);
  border: 1px solid var(--border); box-shadow: 0 0 0 0 var(--ring); transition: .15s;
}
.form-group input:focus, .input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px var(--ring); background: #0b1330; }
.form-group.danger { background: var(--danger-bg); border-color: var(--danger-border); }
.form-group.danger .label { color: var(--danger); }
.form-group.danger .input { border-color: var(--danger); }

/* === TRANG CHỦ (index.html) === */
.hero { text-align: center; padding: 80px 20px; }
.hero h1 { font-size: 3em; margin: 0 0 15px 0; line-height: 1.2; }
.hero p { font-size: 1.2em; color: var(--muted); max-width: 600px; margin: 0 auto 30px auto; }
.feature-showcase-container { border-top: 1px solid var(--border); }
.feature-showcase { display: flex; align-items: center; gap: 50px; margin-top: 60px; flex-wrap: wrap; opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.feature-showcase.visible { opacity: 1; transform: translateY(0); }
.feature-showcase:nth-child(even) { flex-direction: row-reverse; }
.feature-image {
  flex: 1 1 35%;
  max-width: 400px;
  min-width: 300px;
}
.feature-description {
  flex: 1 1 60%;
  min-width: 320px;
}
.feature-image img { width: 100%; border-radius: 12px; box-shadow: 0 10px 40px rgba(0,0,0,.35); border: 1px solid var(--border); }
.feature-description h3 { font-size: 2.2em; margin-top: 0; color: var(--text); }
.feature-description p { font-size: 1.1em; line-height: 1.7; color: var(--muted); }
.footer { text-align: center; padding: 40px 20px; border-top: 1px solid var(--border); color: var(--muted); }

/* === DASHBOARD & ADMIN LAYOUT === */
.dashboard-layout { display: flex; }
.dashboard-sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--bg);
  height: calc(100vh - 61px);
  padding: 20px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 15px;
}
.dashboard-main {
  flex-grow: 1;
  padding: 30px;
  height: calc(100vh - 61px);
  overflow-y: auto;
}
.profile-summary {
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.avatar {
  width: 70px; height: 70px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5em; font-weight: bold; color: var(--bg);
  margin: 0 auto 10px auto;
}
.profile-summary h3 { margin: 0 0 5px 0; }
.dashboard-nav ul { list-style: none; padding: 0; margin: 0; }
.dashboard-nav ul li a {
  display: flex; align-items: center; gap: 15px;
  padding: 12px 15px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--muted);
  transition: all .2s ease;
}
.dashboard-nav ul li a:hover {
  color: var(--text);
  background: #182240;
}
.dashboard-nav ul li a.active {
  background: var(--primary-gradient);
  color: var(--bg);
  box-shadow: 0 5px 20px rgba(79, 140, 255, .2);
}
.dashboard-nav ul li a.active i { color: var(--bg); }
.dashboard-nav i { font-size: 1.2em; width: 25px; text-align: center; color: var(--primary); transition: all .2s ease; }
.download-btn-sidebar {
  display: block; text-align: center;
  background: #0e1530; color: var(--text); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px; text-decoration: none;
  font-weight: 500; transition: .2s;
}
.download-btn-sidebar:hover { background: #121a32; border-color: var(--primary); }

/* === BỔ SUNG ĐỂ SỬA LỖI HIỂN THỊ CÁC MỤC === */
/* Các phần nội dung mặc định bị ẩn đi */
.content-section {
  display: none;
  width: 100%;
  box-sizing: border-box;
}

/* Chỉ hiển thị phần nội dung được chọn */
.content-section.active {
  display: block;
}

/* Dashboard-specific components */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}
.stat-card {
  background: var(--card);
  padding: 25px;
  border-radius: 16px;
  border: 1px solid var(--border);
}
.stat-value {
  font-size: 2.5em;
  font-weight: bold;
  color: var(--primary);
  margin-bottom: 5px;
}
.stat-label {
  font-size: 1em;
  color: var(--muted);
}
.pricing-tabs {
  display: flex;
  gap: 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.pricing-tabs .tab-link {
  background: none;
  border: none;
  padding: 10px 20px;
  font-size: 1em;
  color: var(--muted);
  cursor: pointer;
  transition: .2s;
  border-bottom: 3px solid transparent;
}
.pricing-tabs .tab-link.active {
  color: var(--primary);
  border-color: var(--primary);
  font-weight: bold;
}
.pricing-content { display: none; }
.pricing-content.active { display: block; }
.pricing-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.pricing-option {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 25px;
  text-align: center;
  transition: transform .2s ease;
}
.pricing-option:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,.25); }
.pricing-option h4 { font-size: 1.5em; margin: 0 0 10px 0; }
.pricing-option .price { font-size: 2em; font-weight: bold; color: var(--primary); }
.pricing-option .original-price { color: var(--muted); text-decoration: line-through; margin-bottom: 5px; }

/* Các kiểu bổ sung cho admin.html */
.dashboard-layout .navbar { display: none; }
.dashboard-layout .dashboard-main { padding-top: 0; }
.dashboard-layout .dashboard-sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--bg);
  height: 100vh;
  padding: 20px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 15px;
  position: sticky;
  top: 0;
}
.dashboard-layout .dashboard-nav ul li a.active {
  background: var(--card);
  color: var(--primary);
  box-shadow: none;
  border-left: 3px solid var(--primary);
  border-radius: 0 8px 8px 0;
}
.dashboard-layout .dashboard-nav ul li a.active i { color: var(--primary); }
.dashboard-layout .dashboard-nav ul li a {
  padding: 12px 20px;
  border-left: 3px solid transparent;
  border-radius: 0;
}