/* Base & Reset */
:root {
    /* Colors - Modern palette tailored for 'clean' and 'trust' */
    --clr-primary: #4F46E5; /* Indigo */
    --clr-primary-dark: #4338CA;
    --clr-secondary: #0EA5E9; /* Light blue */
    --clr-accent: #F43F5E; /* Rose */
    
    --clr-dark: #0F172A;
    --clr-dark-light: #1E293B;
    --clr-light: #F8FAFC;
    --clr-white: #FFFFFF;
    
    --clr-gray-100: #F1F5F9;
    --clr-gray-300: #CBD5E1;
    --clr-gray-500: #64748B;
    --clr-gray-700: #334155;
    
    --gradient-primary: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
    --gradient-accent: linear-gradient(135deg, #F43F5E, #F97316);
    
    /* Typography */
    --font-sans: 'Inter', 'Noto Sans JP', sans-serif;
    
    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.4);
    
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--clr-dark);
    background-color: var(--clr-white);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.text-center { text-align: center; }
.relative { position: relative; }
.z-10 { z-index: 10; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-12 { margin-top: 3rem; }
.mt-auto { margin-top: auto; }

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.section {
    padding: 5rem 0;
}

.pt-0 {
    padding-top: 0 !important;
}

.bg-light {
    background-color: var(--clr-gray-100);
}

.archive-cat {
    display: inline-block;
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    filter: brightness(110%);
}

.btn-secondary {
    background-color: var(--clr-white);
    color: var(--clr-primary);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: var(--clr-gray-100);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--clr-gray-300);
    color: var(--clr-gray-700);
}

.btn-outline:hover {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
    background-color: rgba(79, 70, 229, 0.05);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-xl {
    padding: 1.25rem 2.5rem;
    font-size: 1.25rem;
}

.btn-block {
    width: 100%;
}

.shadow-glow {
    box-shadow: var(--shadow-glow);
}

/* Header & Glassmorphism */
.glass-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
}

.glass-header.scrolled {
    box-shadow: var(--shadow-sm);
    background: rgba(255, 255, 255, 0.95);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.main-nav ul {
    display: flex;
    gap: 2rem;
}

.main-nav a {
    font-weight: 500;
    color: var(--clr-gray-700);
}

.main-nav a:hover {
    color: var(--clr-primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--clr-dark);
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.95)), url('images/hero_jikka.png') center/cover no-repeat;
    background-attachment: fixed;
    overflow: hidden;
}

.hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 10s infinite ease-in-out alternate;
}

.shape-1 {
    top: -10%;
    right: -5%;
    width: 500px;
    height: 500px;
    background: var(--clr-primary);
}

.shape-2 {
    bottom: -10%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: var(--clr-secondary);
    animation-delay: -5s;
}

.shape-3 {
    top: 30%;
    left: 20%;
    width: 300px;
    height: 300px;
    background: rgba(244, 63, 94, 0.3);
    animation-delay: -2s;
}

@keyframes float {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(30px, -30px) rotate(10deg); }
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(79, 70, 229, 0.1);
    color: var(--clr-primary);
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(79, 70, 229, 0.2);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero-title br {
    display: block;
}

@media (max-width: 768px) {
    .hero-title br {
        display: none;
    }
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--clr-gray-700);
    margin-bottom: 2.5rem;
}

.highlight {
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 12px;
    background: rgba(14, 165, 233, 0.2);
    z-index: -1;
    transform: rotate(-1deg);
}

/* Roadmap Grid */
.section-header {
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--clr-gray-500);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step-card {
    background: var(--clr-white);
    border-radius: var(--radius-xl);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--clr-gray-100);
    z-index: 2;
}

.step-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(79, 70, 229, 0.2);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 2rem;
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-md);
}

.step-icon {
    font-size: 3rem;
    color: var(--clr-primary);
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.step-subtitle {
    font-size: 0.875rem;
    color: var(--clr-accent);
    font-weight: 600;
    margin-bottom: 1rem;
}

.step-text {
    color: var(--clr-gray-500);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

/* Blog Section */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.blog-card {
    background: var(--clr-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.blog-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--clr-dark-light), var(--clr-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.2);
    font-size: 4rem;
    transition: var(--transition);
}

.article-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.blog-card:hover .image-placeholder,
.blog-card:hover .article-thumbnail {
    transform: scale(1.05);
}

.blog-category {
    display: inline-block;
    align-self: flex-start;
    background: rgba(79, 70, 229, 0.1);
    color: var(--clr-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.blog-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.blog-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.blog-title a:hover {
    color: var(--clr-primary);
}

.blog-excerpt {
    color: var(--clr-gray-500);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.blog-footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--clr-gray-100);
}

.read-more {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--clr-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.blog-card:hover .read-more {
    gap: 0.75rem;
}

.note-text {
    color: var(--clr-gray-500);
    font-style: italic;
}

/* Breadcrumbs */
.breadcrumb-nav {
    padding: 1rem 0;
    margin-bottom: 2rem;
    position: relative;
    z-index: 20;
}
.breadcrumb {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--clr-gray-500);
}
.breadcrumb a {
    color: var(--clr-primary);
    text-decoration: none;
    transition: var(--transition-base);
}
.breadcrumb a:hover {
    color: var(--clr-primary-dark);
    text-decoration: underline;
}
.breadcrumb li.current {
    color: var(--clr-gray-700);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 250px;
    font-weight: 600;
}
.breadcrumb i {
    font-size: 0.7rem;
    color: var(--clr-gray-400);
}

/* Blog Archive & Search */
.blog-archive-section {
    background: var(--clr-white);
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--clr-gray-100);
}

.archive-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--clr-dark);
}

.search-controls {
    margin-bottom: 2.5rem;
}

.search-box {
    position: relative;
    margin-bottom: 1.5rem;
    max-width: 600px;
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--clr-gray-500);
}

.search-box input {
    width: 100%;
    padding: 1rem 1rem 1rem 3.5rem;
    border: 2px solid var(--clr-gray-300);
    border-radius: 9999px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background: var(--clr-gray-100);
    border: 1px solid transparent;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--clr-gray-700);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    background: var(--clr-gray-300);
}

.filter-btn.active {
    background: var(--clr-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.archive-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.archive-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.25rem;
    background: var(--clr-gray-100);
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid transparent;
}

.archive-item:hover {
    background: white;
    border-color: var(--clr-primary);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.archive-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--clr-dark-light), var(--clr-primary-dark));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.archive-info {
    flex-grow: 1;
}

.archive-cat {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    padding: 0.15rem 0.6rem;
    border-radius: 9999px;
    background: rgba(255,255,255,0.8);
}

.archive-item h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--clr-dark);
    margin: 0;
    line-height: 1.4;
}

.archive-item.hidden {
    display: none !important;
}

/* Bottom CTA */
.pattern-bg {
    background-color: var(--clr-dark);
    background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    color: white;
    padding: 6rem 0;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.cta-desc {
    font-size: 1.25rem;
    color: var(--clr-gray-300);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Author Profile */
.author-profile {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    background: linear-gradient(to right, #f8fafc, #f1f5f9);
    border: 1px solid var(--clr-gray-200);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    margin: 4rem auto;
    max-width: 900px;
    box-shadow: var(--shadow-sm);
}
.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    flex-shrink: 0;
}
.author-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--clr-dark);
}
.author-info p {
    color: var(--clr-gray-700);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--clr-dark-light);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--clr-primary);
    transform: translateY(-5px);
}

/* Breadcrumbs */
.breadcrumb-nav {
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
}
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    color: var(--clr-gray-500);
}
.breadcrumb a {
    color: var(--clr-primary);
    font-weight: 500;
}
.breadcrumb a:hover {
    text-decoration: underline;
}
.breadcrumb i {
    font-size: 0.7rem;
    color: var(--clr-gray-300);
}
.breadcrumb .current {
    color: var(--clr-gray-700);
    font-weight: 600;
}

/* Scroll Hint for Tables */
.scroll-hint {
    display: none;
    text-align: right;
    font-size: 0.85rem;
    color: var(--clr-accent);
    margin-bottom: 0.5rem;
    font-weight: 700;
    animation: flash 2s infinite;
}
@media (max-width: 768px) {
    .scroll-hint {
        display: block;
    }
}
@keyframes flash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Footer */
.footer {
    background: var(--clr-dark-light);
    color: var(--clr-gray-300);
    padding: 4rem 0 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-desc {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-links h4, .footer-legal h4 {
    color: white;
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-links ul li, .footer-legal ul li {
    margin-bottom: 0.75rem;
}

.footer-links a:hover, .footer-legal a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.875rem;
}

/* Animations & Utilities */
.pulse-animation {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.7); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 10px rgba(79, 70, 229, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(79, 70, 229, 0); }
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.reveal-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    transition-delay: var(--delay, 0s);
}

.reveal-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    /* Force ALL fade-in-up elements to be visible on mobile */
    .fade-in-up {
        opacity: 1 !important;
        transform: translateY(0) !important;
    }

    .reveal-item {
        opacity: 1 !important;
        transform: translateY(0) !important;
    }

    .article-content {
        padding: 1.5rem !important;
    }

    .article-title {
        font-size: 1.5rem !important;
    }

    .article-hero-image {
        height: 200px !important;
    }

    .author-profile {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 2rem 1.5rem;
    }
    
    .blog-archive-section {
        padding: 1.5rem;
    }
    
    .archive-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .archive-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
    .header-container {
        position: relative;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .main-nav {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        padding: 1rem 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition);
        z-index: -1;
    }
    
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}