/*
Theme Name: TopInterview Theme
Author: You
Description: A custom theme based on the TopInterview HTML templates.
Version: 1.0
*/

/* CSS Variables for consistent theming */
:root {
    --primary-color: #FCE14B; 
    --text-dark: #1F2937;
    --text-light: #4B5563;
    --bg-light: #F9FAFB;
    --white: #FFFFFF;
    --cta-hover: #EAB308;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* Basic Reset & Typography */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* Header & Navigation */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    z-index: 1002;
}

nav { display: contents; }

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1002;
}

.hamburger span {
    width: 28px; height: 3px;
    background-color: var(--text-dark);
    border-radius: 3px;
    transition: var(--transition);
    transform-origin: left;
}

.hamburger.active span { background-color: var(--primary-color); }
.hamburger.active span:nth-child(1) { transform: rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg); }

.nav-links {
    position: fixed;
    top: 0; right: -100%;
    height: 100vh; width: 80%;
    max-width: 300px;
    background-color: var(--text-dark);
    color: var(--white);
    display: flex; flex-direction: column;
    padding: 6rem 2rem 2rem;
    box-shadow: -5px 0 15px rgba(0,0,0,0.2);
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
}

.nav-links.active { right: 0; }
.nav-links li { margin-bottom: 1.75rem; }
.nav-links a { font-weight: 600; font-size: 1.2rem; transition: color 0.2s; display: block; }
.nav-links a:hover { color: var(--primary-color); }

/* Hero Section */
.hero { background-color: var(--primary-color); padding: 4rem 1.5rem; text-align: center; }
.hero-content { max-width: 800px; margin: 0 auto; }
.hero h1 { font-size: 2.2rem; line-height: 1.2; margin-bottom: 1.5rem; color: #000; }
.hero p { font-size: 1.1rem; margin-bottom: 2rem; color: #222; }

.topic-pills { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem; }
.pill {
    background-color: rgba(255, 255, 255, 0.9);
    color: #000; padding: 0.5rem 1rem;
    border-radius: 50px; font-size: 0.9rem;
    font-weight: 600; box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: transform 0.2s;
}
.pill:hover { transform: scale(1.05); }

/* Topics Section & Cards */
.section-padding { padding: 4rem 1.5rem; max-width: 1200px; margin: 0 auto; }
.section-title { text-align: center; font-size: 2rem; margin-bottom: 3rem; color: var(--text-dark); }
.topic-block { margin-bottom: 4rem; }
.topic-block h3 {
    font-size: 1.5rem; margin-bottom: 1.5rem; padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--primary-color); display: inline-block;
}

.card-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.card {
    background: var(--white); padding: 2rem; border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05); display: flex; flex-direction: column;
    border: 1px solid #E5E7EB; transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-5px); box-shadow: 0 10px 15px rgba(0,0,0,0.1); border-color: var(--primary-color); }
.card-title { font-size: 1.25rem; font-weight: bold; margin-bottom: 1rem; color: var(--text-dark); }
.card-desc { color: var(--text-light); margin-bottom: 1.5rem; flex-grow: 1; }

.cta-btn {
    background-color: var(--text-dark); color: var(--white);
    text-align: center; padding: 0.75rem 1rem; border-radius: var(--border-radius);
    font-weight: 600; transition: var(--transition); border: none; cursor: pointer; display: block;
}
.cta-btn:hover { background-color: var(--cta-hover); color: var(--text-dark); }

/* About Section */
.about-section { background-color: var(--white); text-align: center; border-top: 1px solid #E5E7EB; border-bottom: 1px solid #E5E7EB; }
.about-content { max-width: 800px; margin: 0 auto; }

/* Footer */
footer { background-color: #111827; color: #D1D5DB; padding: 4rem 1.5rem 2rem; }
.footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr; gap: 2.5rem; margin-bottom: 3rem; }
.footer-col h4 { color: var(--white); font-size: 1.2rem; margin-bottom: 1.5rem; }
.footer-col ul li { margin-bottom: 0.75rem; }
.footer-col ul li a:hover { color: var(--primary-color); }
.disclaimer { max-width: 1200px; margin: 0 auto; padding-top: 2rem; border-top: 1px solid #374151; font-size: 0.85rem; text-align: center; color: #9CA3AF; }

/* --- List Page Specific Styles (Inheriting Home Theme) --- */
.container { max-width: 1200px; margin: 0 auto; padding: 2rem 1.5rem; }
.back-btn { color: var(--text-light); font-weight: 600; margin-bottom: 2rem; display: inline-block; transition: var(--transition); }
.back-btn:hover { color: var(--primary-color); }
.detail-header {
    margin-bottom: 3rem;
    text-align: center;
    background: #FCE14B;
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}
.detail-header h1 { font-size: 2.5rem; margin-bottom: 1rem; color: var(--text-dark); }
.detail-header p { color: var(--text-dark); font-size: 1.1rem; max-width: 700px; margin: 0 auto; }
.difficulty-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.level-card { background: var(--white); padding: 2rem; border-radius: var(--border-radius); border: 1px solid #E5E7EB; transition: transform 0.2s; display: flex; flex-direction: column; }
.level-card:hover { transform: translateY(-5px); border-color: var(--primary-color); box-shadow: 0 10px 15px rgba(0,0,0,0.1); }
.level-badge { display: inline-block; padding: 0.3rem 0.8rem; border-radius: 50px; font-size: 0.8rem; font-weight: bold; margin-bottom: 1rem; align-self: flex-start; }
.bg-beginner { background-color: #D1FAE5; color: #065F46; }
.bg-intermediate { background-color: #FEF3C7; color: #92400E; }
.bg-expert { background-color: #FEE2E2; color: #991B1B; }
.bg-challenge { background-color: var(--text-dark); color: var(--primary-color); }
.level-card h3 { margin-bottom: 1rem; color: var(--text-dark); }
.level-card ul { margin-bottom: 1.5rem; color: var(--text-light); flex-grow: 1; padding-left: 1.2rem; list-style: disc; }
.level-card .btn { background-color: var(--text-dark); color: var(--white); text-align: center; padding: 0.75rem; border-radius: var(--border-radius); display: block; font-weight: 600; transition: var(--transition); }
.level-card .btn:hover { background-color: var(--cta-hover); color: var(--text-dark); }
.challenge { border-color: var(--text-dark); }

/* Desktop Media Queries */
@media (min-width: 768px) {
    nav { display: block; margin-left: auto; }
    .hamburger { display: none; }
    .nav-links { position: static; height: auto; width: auto; background-color: transparent; color: var(--text-dark); flex-direction: row; padding: 0; box-shadow: none; gap: 2rem; }
    .nav-links li { margin-bottom: 0; }
    .nav-links a { font-size: 1rem; white-space: nowrap }
    .nav-links a:hover { color: var(--cta-hover); }
    .hero h1 { font-size: 3rem; }
    .card-grid, .difficulty-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: repeat(3, 1fr); }
}