/*
Theme Name: AI Beginner Blog Theme
Theme URI:
Author: Antigravity AI
Author URI:
Description: A beginner-friendly generative AI explanation blog theme with a Japandi aesthetic, inspired by Hitodeblog.
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: ai-beginner-blog-theme
*/

:root {
    /* Japandi x Hitodeblog Palette */
    --bg-color: #FAF7F2;       
    --text-color: #4A4541;     
    --text-light: #7A736A;     
    --accent-color: #C2A88A;   
    --accent-dark: #A68B6C;    
    --accent-light: #F0EBE1;   
    --point-color: #E2A674;    
    --card-bg: #FFFFFF;        
    --border-color: #EAE6DF;   
    --font-main: 'Zen Maru Gothic', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    line-height: 1.8;
    letter-spacing: 0.05em;
    -webkit-font-smoothing: antialiased;
}

/* ============================
   Header & Layout
   ============================ */
.site-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner, .container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

.site-title {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-color);
}

/* ============================
   Hero Section
   ============================ */
.hero {
    padding: 60px 0 40px;
    text-align: center;
}

.hero-flex {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

@media (min-width: 768px) {
    .hero {
        padding: 80px 0 60px;
    }
    .hero-flex {
        flex-direction: row-reverse;
        justify-content: space-between;
        align-items: center;
        gap: 60px;
    }
    .hero-text {
        text-align: left;
        flex: 1;
    }
    .hero-badge {
        margin-bottom: 24px;
    }
}

.hero-badge {
    display: inline-block;
    background-color: var(--point-color);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 24px;
    box-shadow: 0 4px 10px rgba(226, 166, 116, 0.3);
}

.hero-image-wrapper {
    margin: 0 auto;
    width: 100%;
    max-width: 400px; 
}

@media (min-width: 768px) {
    .hero-image-wrapper {
        flex: 1;
        margin: 0;
        max-width: 500px; 
    }
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: 16px;
    mix-blend-mode: multiply; 
}

.hero-title {
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    font-weight: 700;
    line-height: 1.6;
    margin-bottom: 24px;
    color: #332F2C;
}

.highlight {
    background: linear-gradient(transparent 60%, rgba(194, 168, 138, 0.4) 60%);
    font-weight: bold;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 32px;
}

/* ============================
   Buttons
   ============================ */
.secondary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--card-bg);
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    text-decoration: none;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    transition: all 0.3s;
}

.secondary-btn:hover {
    background-color: var(--accent-color);
    color: #fff;
}

.center-btn-wrapper {
    text-align: center;
    margin: 40px 0;
}

/* ============================
   TOC (Visual Jump Links)
   ============================ */
.toc {
    margin: 40px 0;
    background-color: var(--card-bg);
    border: 2px solid var(--accent-light);
    border-radius: 16px;
    padding: 24px;
}

.toc-title {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-color);
}

.toc-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

@media (min-width: 480px) {
    .toc-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 768px) {
    .toc-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.toc-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--accent-light);
    text-decoration: none;
    color: var(--text-color);
    padding: 16px;
    border-radius: 12px;
    transition: background-color 0.3s, transform 0.2s;
    text-align: center;
}

.toc-item:hover {
    background-color: var(--accent-color);
    color: #fff;
    transform: translateY(-2px);
}

.toc-step {
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.toc-text {
    font-weight: 700;
    font-size: 0.95rem;
}

/* ============================
   Speech Bubbles
   ============================ */
.speech-bubble-container {
    display: flex;
    align-items: flex-start;
    margin: 32px 0;
    gap: 16px;
}

.speech-bubble-container.right {
    flex-direction: row;
    justify-content: flex-end;
}

.character-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 60px;
    flex-shrink: 0;
}

.char-img {
    width: 60px;
    height: 60px;
    background-color: var(--card-bg);
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    padding: 12px;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.char-name {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-light);
    white-space: nowrap;
}

.speech-bubble {
    position: relative;
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.04);
    max-width: calc(100% - 76px);
}

.speech-bubble.left::before {
    content: '';
    position: absolute;
    top: 20px;
    left: -10px;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-right: 10px solid var(--card-bg);
}

.speech-bubble.right {
    background-color: var(--accent-light);
    box-shadow: none;
}

.speech-bubble.right::before {
    content: '';
    position: absolute;
    top: 20px;
    right: -10px;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-left: 10px solid var(--accent-light);
}

.speech-bubble p {
    margin-bottom: 0;
}

/* ============================
   Boxes & Lists
   ============================ */
.point-box {
    margin: 40px 0;
    padding: 32px 24px 24px;
    background-color: rgba(226, 166, 116, 0.08);
    border: 2px solid var(--point-color);
    border-radius: 8px;
    position: relative;
}

.box-title {
    position: absolute;
    top: -16px;
    left: 16px;
    background-color: var(--point-color);
    color: #fff;
    padding: 4px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.check-list {
    list-style: none;
    margin: 16px 0;
}

.check-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 12px;
    font-weight: 500;
}

.check-list i {
    color: var(--point-color);
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 4px;
}

.example-box {
    background-color: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
    font-size: 0.95rem;
    border: 1px dashed var(--border-color);
}

.feature-list {
    list-style: none;
    margin: 24px 0;
}

.feature-list li {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
}

/* ============================
   Sections & Headings
   ============================ */
.step-section {
    margin: 80px 0;
}

.section-heading {
    position: relative;
    padding: 16px 16px 16px 60px;
    background-color: var(--card-bg);
    border-radius: 8px;
    font-size: 1.35rem;
    margin-bottom: 32px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    border-left: 6px solid var(--accent-color);
}

.heading-step {
    position: absolute;
    top: 50%;
    left: -20px;
    transform: translateY(-50%);
    background-color: var(--accent-color);
    color: #fff;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

@media (max-width: 480px) {
    .section-heading {
        padding: 16px 16px 16px 40px;
        font-size: 1.2rem;
    }
    .heading-step {
        left: -10px;
        padding: 6px 8px;
        font-size: 0.7rem;
    }
}

/* ============================
   Q&A Section
   ============================ */
.qa-item {
    margin-bottom: 24px;
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.qa-q {
    background-color: var(--accent-light);
    padding: 16px 20px;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    gap: 12px;
    align-items: center;
}

.qa-q span {
    color: var(--accent-color);
    font-size: 1.3rem;
}

.qa-a {
    padding: 20px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.qa-a span {
    color: var(--point-color);
    font-size: 1.3rem;
    font-weight: 700;
}

/* ============================
   Footer & Misc
   ============================ */
.final-message {
    text-align: center;
    padding: 60px 0;
    margin-top: 40px;
    font-size: 1.2rem;
    font-weight: 700;
    border-top: 2px dashed var(--border-color);
}

.site-footer {
    background-color: var(--card-bg);
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 80px;
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}