/* ============================================================
   K1dev — Component & Page-Specific Styles
   ============================================================ */

/* PAGE HEADER */
.page-header {
    padding: calc(80px + var(--space-16)) 0 var(--space-12);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}
.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 50%, rgba(124, 58, 237, 0.04) 0%, transparent 60%);
    pointer-events: none;
}
.page-header-content { position: relative; z-index: 1; }
.page-title { font-size: var(--text-4xl); margin-bottom: var(--space-4); line-height: 1.15; }
.page-subtitle { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 600px; margin-bottom: 0; line-height: 1.65; }
.breadcrumb { display: flex; align-items: center; gap: var(--space-2); font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-4); }
.breadcrumb a { color: var(--color-text-muted); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb-sep { color: var(--color-text-faint); opacity: 0.5; }

/* HERO */
.hero { position: relative; min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding: 100px 0 var(--space-16); overflow: hidden; background: var(--color-bg); }
.hero-canvas { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: 0; pointer-events: none; }
.hero-grid-overlay {
    position: absolute; inset: 0; z-index: 0; pointer-events: none;
    background-image: linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6) 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6) 0%, transparent 75%);
}
.hero-container { position: relative; z-index: 1; }
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); align-items: center; }
.hero-headline { display: flex; flex-direction: column; }
.hero-terminal { max-width: 520px; }
#typing-output { color: var(--color-accent); transition: opacity 0.25s ease; padding-left: var(--space-6); font-size: var(--text-xs); }
.hero-title { font-size: clamp(2.5rem, 5vw, 4rem); line-height: 1.1; margin-bottom: var(--space-6); color: var(--color-text-heading); }
.gradient-text { background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 480px; margin-bottom: var(--space-8); line-height: 1.7; }
.hero-stats { display: flex; align-items: center; gap: var(--space-8); margin-top: var(--space-16); padding-top: var(--space-12); border-top: 1px solid var(--color-border-dim); }
.hero-stat { display: flex; flex-direction: column; gap: var(--space-1); }
.hero-stat-value { font-family: var(--font-mono); font-size: var(--text-3xl); font-weight: 700; color: var(--color-primary); line-height: 1; }
.hero-stat-label { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.08em; }
.hero-stat-divider { font-family: var(--font-mono); font-size: var(--text-2xl); color: var(--color-border); flex-shrink: 0; }
.hero-scroll { position: absolute; bottom: var(--space-8); left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: var(--space-2); z-index: 1; }
.hero-scroll-text { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.15em; writing-mode: vertical-rl; }
.hero-scroll-line { display: block; width: 1px; height: 40px; background: linear-gradient(to bottom, var(--color-primary), transparent); animation: scrollIndicator 2s ease-in-out infinite; }
@keyframes scrollIndicator { 0%, 100% { transform: scaleY(1); opacity: 1; } 50% { transform: scaleY(0.5); opacity: 0.5; } }

/* SECTION */
.section-header { margin-bottom: var(--space-12); }
.section-cta { margin-top: var(--space-12); text-align: center; }
.section-label-row { margin-bottom: var(--space-8); }
.section-skills { background: var(--color-bg-secondary); border-top: 1px solid var(--color-border-dim); border-bottom: 1px solid var(--color-border-dim); }
.section-elearnings { background: var(--color-bg); }
.section-ai { background: var(--color-bg-secondary); border-top: 1px solid var(--color-border-dim); }

/* E-LEARNINGS GRID */
.elearnings-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.elearning-card { display: flex; flex-direction: column; height: 100%; }
.elearning-card .card-body { flex: 1; display: flex; flex-direction: column; }
.elearning-card .card-excerpt { flex: 1; }
.elearning-card .card-footer { margin-top: auto; }
.elearning-card .card-meta .tag svg { vertical-align: -1px; margin-right: var(--space-1); }

/* BUTTON SPACING */
.hero-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-top: var(--space-8); }
.hero-actions .btn { min-width: 160px; justify-content: center; }

/* PROJECTS GRID */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.project-card .card-image { aspect-ratio: 16/9; overflow: hidden; background: var(--color-bg-tertiary); }
.project-card .card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.project-card:hover .card-image img { transform: scale(1.04); }
.card-image--placeholder { display: flex; align-items: center; justify-content: center; background: var(--color-bg-tertiary); min-height: 180px; }
.card-image--placeholder .placeholder-icon { font-family: var(--font-mono); font-size: var(--text-3xl); color: var(--color-text-faint); }
.card-image--ai { display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(0,212,255,0.08)); min-height: 180px; }
.ai-icon-wrap { color: var(--color-secondary); opacity: 0.7; }
.card-meta { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-3); }
.card-title { font-size: var(--text-lg); margin-bottom: var(--space-3); line-height: 1.4; }
.card-title a { color: var(--color-text-heading); transition: color var(--transition); }
.card-title a:hover { color: var(--color-primary); }
.card-excerpt { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.65; margin-bottom: var(--space-4); }
.tech-stack { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }
.card-footer { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-3); padding: var(--space-4) var(--space-6); }
.card-footer .btn { margin: 0; }
.code-placeholder { font-size: var(--text-xs); line-height: 1.7; background: transparent; border: none; padding: var(--space-4); margin: 0; white-space: pre; }

/* LEARNINGS LIST (row layout — kept for homepage featured strip) */
.learnings-list { display: flex; flex-direction: column; }
.learning-row { display: grid; grid-template-columns: 160px 1fr 40px; gap: var(--space-6); align-items: center; padding: var(--space-6) 0; border-bottom: 1px solid var(--color-border-dim); transition: background var(--transition); }
.learning-row:last-child { border-bottom: none; }
.learning-row:hover { background: rgba(0, 212, 255, 0.02); }
.learning-row-meta { display: flex; flex-direction: column; gap: var(--space-2); flex-shrink: 0; }
.learning-time { display: flex; align-items: center; gap: var(--space-1); font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); }
.learning-date { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); }
.learning-row-title { font-size: var(--text-base); margin-bottom: var(--space-1); }
.learning-row-title a { color: var(--color-text-heading); transition: color var(--transition); }
.learning-row-title a:hover { color: var(--color-primary); }
.learning-row-excerpt { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-2); }
.learning-topics { display: flex; flex-wrap: wrap; gap: var(--space-1); }
.learning-row-arrow { display: flex; align-items: center; justify-content: center; color: var(--color-text-faint); transition: all var(--transition); border-radius: var(--radius-md); padding: var(--space-2); }
.learning-row:hover .learning-row-arrow { color: var(--color-primary); background: rgba(0, 212, 255, 0.08); }

/* LEARNINGS GRID (card layout — used on /learnings page) */
.learnings-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.learning-card { display: flex; flex-direction: column; height: 100%; }
.learning-card .card-body { flex: 1; display: flex; flex-direction: column; padding: var(--space-6); }
.learning-card .card-footer { margin-top: auto; border-top: 1px solid var(--color-border); padding: var(--space-4) var(--space-6); display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2); }
.learning-card-meta { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-3); }
.learning-card-title { font-size: var(--text-lg); margin-bottom: var(--space-3); line-height: 1.4; }
.learning-card-title a { color: var(--color-text-heading); transition: color var(--transition); }
.learning-card-title a:hover { color: var(--color-primary); }
.learning-card-excerpt { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.65; margin-bottom: var(--space-4); flex: 1; }
.learning-card-topics { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-top: auto; }
.learning-card-readtime { display: flex; align-items: center; gap: var(--space-1); font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); }
.learning-card .learning-date { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); }

/* SKILLS CLOUD — see Visual Polish section below for full styles */

/* AI HIGHLIGHT */
.ai-highlight { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); align-items: center; }
.ai-highlight-content .section-subtitle { max-width: 440px; }
.ai-terminal { max-width: 480px; }
.ai-stack-bar { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-12); padding: var(--space-4) var(--space-6); background: var(--color-bg-secondary); border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.ai-stack-label { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.1em; flex-shrink: 0; }
.ai-stack-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* FILTER BAR */
.filter-bar { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-10); }
.filter-tag { cursor: pointer; border: 1px solid var(--color-border); background: rgba(0,212,255,0.04); color: var(--color-text-muted); font-family: var(--font-mono); font-size: var(--text-xs); padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); letter-spacing: 0.04em; transition: all var(--transition); }
.filter-tag:hover, .filter-tag.active { background: var(--color-primary); color: var(--color-bg); border-color: var(--color-primary); }

/* COURSES GRID */
.courses-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.course-card .card-title { font-size: var(--text-base); }
.course-duration { display: flex; align-items: center; gap: var(--space-2); font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-4); }
.course-progress { margin-top: var(--space-4); }
.progress-wrap { height: 4px; background: var(--color-bg-tertiary); border-radius: var(--radius-full); overflow: hidden; margin-bottom: var(--space-2); }
.progress-bar { height: 100%; background: var(--color-primary); border-radius: var(--radius-full); transition: width 1s ease; }
.progress-bar--complete { background: var(--color-accent); }
.progress-bar--active { background: var(--color-warning); }
.progress-label { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); }

/* ABOUT PAGE */
.about-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); align-items: start; }
.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); margin-top: var(--space-8); }
.skill-category-card { height: 100%; }
.skill-category-title { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-primary); margin-bottom: var(--space-4); font-weight: 600; }

/* CONTACT PAGE */
.contact-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--space-12); align-items: start; }
.contact-terminal { margin-bottom: var(--space-8); }
.form-submit { margin-top: var(--space-8); }
.form-feedback { margin-top: var(--space-4); font-family: var(--font-mono); font-size: var(--text-sm); padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); display: none; }
.form-feedback.success { display: block; background: rgba(6,214,160,0.1); color: var(--color-accent); border: 1px solid rgba(6,214,160,0.25); }
.form-feedback.error { display: block; background: rgba(239,68,68,0.1); color: var(--color-danger); border: 1px solid rgba(239,68,68,0.25); }
.contact-info-title { font-size: var(--text-xl); margin-bottom: var(--space-6); }
.contact-links { display: flex; flex-direction: column; gap: var(--space-4); }
.contact-link { display: flex; align-items: center; gap: var(--space-4); padding: var(--space-4); background: var(--color-bg-tertiary); border: 1px solid var(--color-border); border-radius: var(--radius-md); color: var(--color-text); transition: all var(--transition); }
.contact-link:hover { border-color: var(--color-primary); color: var(--color-text); background: rgba(0,212,255,0.05); }
.contact-link-icon { color: var(--color-primary); flex-shrink: 0; }
.contact-link-content { display: flex; flex-direction: column; gap: var(--space-1); }
.contact-link-content strong { font-size: var(--text-sm); color: var(--color-text-heading); }
.contact-link-content span { font-size: var(--text-xs); color: var(--color-text-muted); }

/* SINGLE ARTICLE */
.single-header { margin-bottom: var(--space-10); }
.single-header-meta { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-4); }
.single-title { font-size: var(--text-4xl); line-height: 1.15; margin-bottom: var(--space-4); }
.single-links { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }
.single-date { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); }
.single-topics { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }
.single-featured-image { margin-bottom: var(--space-10); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-border); }
.single-featured-image img { width: 100%; height: auto; }
.single-learning-layout { max-width: 800px; margin: 0 auto; }
.single-project-layout { max-width: 900px; margin: 0 auto; }

/* PROSE */
.prose { font-size: var(--text-base); line-height: 1.8; color: var(--color-text); }
.prose h1, .prose h2, .prose h3, .prose h4, .prose h5, .prose h6 { margin-top: var(--space-10); margin-bottom: var(--space-4); color: var(--color-text-heading); }
.prose p { margin-bottom: var(--space-5); }
.prose ul, .prose ol { margin-bottom: var(--space-5); padding-left: var(--space-6); }
.prose li { margin-bottom: var(--space-2); }
.prose a { color: var(--color-primary); text-decoration: underline; text-decoration-color: rgba(0,212,255,0.3); text-underline-offset: 3px; transition: text-decoration-color var(--transition); }
.prose a:hover { text-decoration-color: var(--color-primary); }
.prose blockquote { margin: var(--space-8) 0; padding: var(--space-4) var(--space-6); background: rgba(0,212,255,0.04); border-radius: 0 var(--radius-md) var(--radius-md) 0; }
.prose pre { margin: var(--space-8) 0; }
.prose img { border-radius: var(--radius-md); margin: var(--space-8) auto; border: 1px solid var(--color-border); }
.prose table { width: 100%; border-collapse: collapse; margin: var(--space-8) 0; font-size: var(--text-sm); }
.prose th, .prose td { padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); text-align: left; }
.prose th { background: var(--color-bg-tertiary); font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-primary); }

/* POST NAV */
.post-navigation { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); margin-top: var(--space-16); padding-top: var(--space-10); border-top: 1px solid var(--color-border); }
.nav-label { display: block; font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--space-1); }
.nav-title { display: block; font-size: var(--text-sm); color: var(--color-text-muted); }
.post-navigation a { padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: all var(--transition); display: block; }
.post-navigation a:hover { border-color: var(--color-primary); background: rgba(0,212,255,0.04); }

/* EMPTY STATE */
.empty-state { max-width: 600px; margin: var(--space-12) auto; }

/* PAGINATION */
.pagination { display: flex; justify-content: center; gap: var(--space-2); margin-top: var(--space-12); flex-wrap: wrap; }
.pagination .page-numbers { font-family: var(--font-mono); font-size: var(--text-sm); padding: var(--space-2) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); color: var(--color-text-muted); transition: all var(--transition); }
.pagination .page-numbers:hover, .pagination .page-numbers.current { background: var(--color-primary); color: var(--color-bg); border-color: var(--color-primary); }

/* ============================================================
   VISUAL POLISH — Improvements
   ============================================================ */

/* Gradient headings on section titles */
.section-title {
    background: linear-gradient(135deg, var(--color-text-heading) 60%, rgba(226,232,240,0.6));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Skills cloud improvements — visually grouped cards */
.skills-cloud { display: flex; flex-direction: column; gap: var(--space-4); }
.skill-group {
    display: flex;
    align-items: flex-start;
    gap: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5) var(--space-6);
    transition: border-color var(--transition);
}
.skill-group:hover { border-color: var(--color-border-accent); }
.skill-group-label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    flex-shrink: 0;
    width: 100px;
    padding-top: var(--space-1);
}
.skill-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); flex: 1; }

/* AI highlight section spacing */
.ai-highlight-content .section-title { margin-bottom: var(--space-4); }
.ai-highlight-content .btn { margin-top: var(--space-4); }

/* Consistent card body padding */
.card-body { padding: var(--space-6); }

/* Section cta extra spacing */
.section-cta { margin-top: var(--space-16); }

/* Smooth hover on tag */
.tag { transition: all var(--transition-spring); }

/* Featured learnings on homepage get a subtle left border */
.learnings-list .learning-row {
    border-left: 2px solid transparent;
    padding-left: var(--space-4);
    margin-left: calc(-1 * var(--space-4));
    border-radius: var(--radius-sm);
}
.learnings-list .learning-row:hover {
    border-left-color: var(--color-primary);
    background: rgba(0, 212, 255, 0.03);
}

/* Section alt bg fix — ensure full-width background */
.section-skills,
.section-ai {
    width: 100%;
}

/* Spacing consistency: add breathing room before section CTAs */
.section-cta .btn { transition: all var(--transition-spring); }

/* Card hover inner glow animation */
.card {
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

/* Page header subtle glow */
.page-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-primary), transparent);
    opacity: 0.3;
}

/* Difficulty badge refinement */
.badge { display: inline-flex; align-items: center; }

/* Terminal panel improvements */
.terminal { box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 212, 255, 0.06); }
.terminal:hover { box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 212, 255, 0.12); }

/* Gradient text utility */
.text-gradient-cyan { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.text-gradient-purple { background: linear-gradient(135deg, var(--color-secondary), var(--color-primary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* RESPONSIVE */
@media (max-width: 1024px) {
    .projects-grid, .courses-grid, .learnings-grid, .elearnings-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-content { grid-template-columns: 1fr; gap: var(--space-8); }
    .hero-terminal { max-width: 100%; order: 2; }
    .hero-headline { order: 1; }
    .ai-highlight { grid-template-columns: 1fr; }
    .about-layout, .contact-layout { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .hero { min-height: auto; padding: 100px 0 var(--space-12); }
    .hero-title { font-size: var(--text-3xl); }
    .hero-stats { flex-wrap: wrap; gap: var(--space-6); }
    .hero-stat-divider { display: none; }
    .page-title { font-size: var(--text-3xl); }
    .projects-grid, .courses-grid, .learnings-grid, .elearnings-grid { grid-template-columns: 1fr; }
    .skill-group { flex-direction: column; gap: var(--space-3); }
    .skill-group-label { width: auto; }
    .learning-row { grid-template-columns: 1fr auto; gap: var(--space-4); }
    .learning-row-meta { grid-column: 1 / -1; flex-direction: row; flex-wrap: wrap; }
    .single-title { font-size: var(--text-2xl); }
    .post-navigation { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .filter-bar { gap: var(--space-1); }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .btn { text-align: center; justify-content: center; width: 100%; }
    .learnings-grid { grid-template-columns: 1fr; }
}