/**
 * Theme Name: Khoa Hoc Academy
 * Author: Gemini
 * Description: A custom theme for a learning platform with a modern, flat, cyberpunk-inspired design.
 * Version: 2.0
 */

/* --- Biến Toàn Cục & Reset --- */
:root {
    --primary-color: #00f7ff;    /* Cyan Neon */
    --secondary-color: #ff00ff; /* Magenta Neon */
    --background-color: #0d0d1a; /* Dark Blue/Purple */
    --surface-color: #1a1a2e;  /* Slightly Lighter Dark Blue */
    --heading-color: #f0f0f0;   /* Off-white */
    --text-color: #b0b0d0;      /* Light Lavender */
    --border-color: rgba(0, 247, 255, 0.25);
    --success-color: #00ff8c;
    --font-family-heading: 'Share Tech Mono', monospace;
    --font-family-body: 'Be Vietnam Pro', sans-serif;
}

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

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: var(--font-family-body);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    color: var(--heading-color);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--secondary-color);
    filter: brightness(1.2);
}

.page-container {
    padding: 60px 0;
}

.page-title {
    text-align: center;
    margin-bottom: 40px;
    color: var(--primary-color);
    text-shadow: 0 0 5px var(--primary-color);
}

.button,
button,
input[type="submit"],
input[type="button"] {
    display: inline-block;
    padding: 12px 28px;
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: 4px;
    font-family: var(--font-family-heading);
    font-size: 1rem;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    box-shadow: none; /* No shadow */
}

.button:hover,
button:hover,
input[type="submit"]:hover,
input[type="button"]:hover {
    background-color: var(--primary-color);
    color: var(--background-color);
    border-color: var(--primary-color);
}

.button-primary {
    background-color: var(--primary-color);
    color: var(--background-color);
    font-weight: 700;
}
.button-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    color: var(--heading-color);
}

/* --- Header --- */
.site-header {
    background-color: var(--surface-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    box-shadow: none;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-header .logo a {
    font-size: 1.5rem;
    font-family: var(--font-family-heading);
    color: var(--heading-color);
}

.site-header .logo i {
    color: var(--primary-color);
    margin-right: 10px;
}

.site-header .main-navigation ul {
    list-style: none;
    display: flex;
    align-items: center;
}

.site-header .main-navigation li {
    margin-left: 30px;
}

.site-header .main-navigation a {
    font-family: var(--font-family-heading);
    text-transform: uppercase;
}
.site-header .main-navigation a.button {
    padding: 8px 20px;
}

/* --- Footer --- */
.site-footer {
    background-color: var(--surface-color);
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 60px;
}

/* --- General Components --- */
.notice {
    text-align: center;
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: 4px;
    border-left: 4px solid var(--secondary-color);
}

/* --- Home Page --- */
.hero-section {
    text-align: center;
    padding: 80px 0;
}
.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
}
.hero-section p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
}

.roadmap-section {
    margin-top: 60px;
}
.roadmap-item {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 30px;
    margin-bottom: 20px;
    border-radius: 4px;
    transition: border-color 0.3s ease;
}
.roadmap-item:hover {
    border-color: var(--secondary-color);
}

/* --- Account Page --- */
.course-details-container {
    margin-top: 40px;
}
.course-module {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 20px;
    overflow: hidden;
}
.course-module .module-header {
    background-color: transparent;
    border: none;
    width: 100%;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    color: var(--heading-color);
}
.course-module .module-header:hover {
    background-color: rgba(0, 247, 255, 0.05);
}
.course-module .module-header i {
    transition: transform 0.3s ease;
}
.course-module .module-header.active i {
    transform: rotate(180deg);
}
.course-module .module-content {
    padding: 0 30px 30px;
    border-top: 1px solid var(--border-color);
}
.course-module ul {
    list-style-position: inside;
}
.course-module li {
    margin-bottom: 10px;
}
.course-module ul strong {
    color: var(--primary-color);
}
.module-action {
    margin-top: 20px;
}
.video-container {
    margin-top: 30px;
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.live-zoom-section {
    margin-bottom: 40px;
    text-align: center;
}
.teacher-grade-section {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px;
    background-color: var(--surface-color);
    border-radius: 4px;
    border: 1px dashed var(--secondary-color);
}
.button-teacher-grade {
    padding: 20px 40px;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    border-width: 2px;
    background-color: var(--secondary-color);
    color: #fff;
    border-color: var(--secondary-color);
    transition: all 0.3s ease;
}
.button-teacher-grade:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--background-color);
    transform: scale(1.05);
}

/* --- BXH Page --- */
.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 40px;
}
.leaderboard-table th, .leaderboard-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.leaderboard-table thead {
    background-color: var(--surface-color);
}
.leaderboard-table th {
    font-family: var(--font-family-heading);
    text-transform: uppercase;
}
.leaderboard-table tr:hover {
    background-color: var(--surface-color);
}
.leaderboard-table .rank { color: var(--primary-color); font-weight: bold; }
.leaderboard-table .gold { color: #ffd700; }
.leaderboard-table .silver { color: #c0c0c0; }
.leaderboard-table .bronze { color: #cd7f32; }


/* --- Quiz/Exam Page --- */
#exam-form {
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}
.form-section {
    margin-bottom: 30px;
}
.question p {
    font-weight: bold;
    color: var(--heading-color);
    margin-bottom: 15px;
}
.options label {
    display: block;
    margin-bottom: 10px;
    cursor: pointer;
}
#exam-form textarea,
#exam-form input[type="text"],
#exam-form input[type="password"],
#exam-form input[type="number"] {
    width: 100%;
    padding: 12px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--heading-color);
    font-size: 1rem;
    transition: all 0.3s ease;
}
#exam-form textarea:focus,
#exam-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}
#exam-form textarea {
    min-height: 150px;
    resize: vertical;
}

/* --- Login Page --- */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 0;
}
.login-form-container {
    width: 100%;
    max-width: 400px;
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}
.form-title {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}
#loginform p {
    margin-bottom: 1.5rem;
}
#loginform label {
    display: block;
    margin-bottom: 5px;
    font-family: var(--font-family-heading);
}
#loginform #wp-submit {
    width: 100%;
}

/* --- Teacher Page --- */
.submission-list .submission-item {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 20px;
    padding: 20px;
}
.submission-meta {
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}
.answer-block {
    margin-bottom: 20px;
}
.grading-form label {
    display: block;
    margin: 15px 0 5px;
    font-family: var(--font-family-heading);
}

/* --- Results Page --- */
.results-list .result-item {
    background-color: var(--surface-color);
    padding: 30px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 20px;
}
.result-meta {
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}
.feedback-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}
.feedback-section h4 {
    color: var(--primary-color);
}