/* ==========================================================================
   Doug Rathbone - Modern Blog Design
   A contemporary, clean blog theme with light/dark mode support
   ========================================================================== */

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Color Palette - Light Mode */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-bg-card: #ffffff;

    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #64748b;
    --color-text-muted: #94a3b8;

    /* Primary Blue */
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-light: #dbeafe;
    --color-accent-subtle: #eff6ff;

    /* Secondary Purple */
    --color-secondary: #7c3aed;
    --color-secondary-hover: #6d28d9;
    --color-secondary-light: #ede9fe;
    --color-secondary-subtle: #f5f3ff;

    /* Tertiary Teal */
    --color-tertiary: #0d9488;
    --color-tertiary-hover: #0f766e;
    --color-tertiary-light: #ccfbf1;
    --color-tertiary-subtle: #f0fdfa;

    /* Warm Coral */
    --color-warm: #f43f5e;
    --color-warm-hover: #e11d48;
    --color-warm-light: #ffe4e6;
    --color-warm-subtle: #fff1f2;

    /* Amber */
    --color-amber: #f59e0b;
    --color-amber-hover: #d97706;
    --color-amber-light: #fef3c7;
    --color-amber-subtle: #fffbeb;

    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    --color-success: #10b981;
    --color-warning: #f59e0b;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --gradient-warm: linear-gradient(135deg, #f43f5e 0%, #f59e0b 100%);
    --gradient-cool: linear-gradient(135deg, #0d9488 0%, #2563eb 100%);
    --gradient-subtle: linear-gradient(135deg, #eff6ff 0%, #f5f3ff 100%);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Layout */
    --container-max: 1200px;
    --content-max: 720px;
    --sidebar-width: 320px;

    /* 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 -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
}

/* Dark Mode */
[data-theme="dark"] {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-bg-card: #1e293b;

    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #94a3b8;
    --color-text-muted: #64748b;

    --color-accent: #3b82f6;
    --color-accent-hover: #60a5fa;
    --color-accent-light: #1e3a5f;
    --color-accent-subtle: #172554;

    --color-secondary: #a78bfa;
    --color-secondary-hover: #c4b5fd;
    --color-secondary-light: #2e1065;
    --color-secondary-subtle: #1e1b4b;

    --color-tertiary: #2dd4bf;
    --color-tertiary-hover: #5eead4;
    --color-tertiary-light: #134e4a;
    --color-tertiary-subtle: #042f2e;

    --color-warm: #fb7185;
    --color-warm-hover: #fda4af;
    --color-warm-light: #4c0519;
    --color-warm-subtle: #310413;

    --color-amber: #fbbf24;
    --color-amber-hover: #fcd34d;
    --color-amber-light: #451a03;
    --color-amber-subtle: #2a1503;

    --color-border: #334155;
    --color-border-light: #1e293b;

    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #a78bfa 100%);
    --gradient-warm: linear-gradient(135deg, #fb7185 0%, #fbbf24 100%);
    --gradient-cool: linear-gradient(135deg, #2dd4bf 0%, #3b82f6 100%);
    --gradient-subtle: linear-gradient(135deg, #172554 0%, #1e1b4b 100%);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

a:hover {
    color: var(--color-accent-hover);
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

p {
    margin: 0;
}

ul, ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

input {
    font-family: inherit;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ==========================================================================
   Header
   ========================================================================== */

/* Hero Header Area */
.site-header {
    position: relative;
    z-index: 100;
    background: var(--gradient-primary);
    border-bottom: none;
    padding: var(--space-8) 0;
}

.site-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

[data-theme="dark"] .site-header {
    background: var(--gradient-primary);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 100px;
    gap: var(--space-8);
    position: relative;
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
}

.logo-name {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: #ffffff;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.tagline {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.85);
    font-style: italic;
    display: none;
}

@media (min-width: 768px) {
    .tagline {
        display: block;
    }
}

.main-nav ul {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--space-2);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(8px);
}

.main-nav a {
    display: block;
    padding: var(--space-3) var(--space-5);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: #ffffff;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.main-nav a:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.main-nav a.active {
    color: var(--color-accent);
    background-color: #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    text-shadow: none;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-md);
    color: #ffffff;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.25);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.35);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

/* ==========================================================================
   Main Content
   ========================================================================== */

.main-content {
    padding: var(--space-12) 0;
    min-height: calc(100vh - 72px - 200px);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-12);
}

@media (min-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr var(--sidebar-width);
    }
}

/* ==========================================================================
   Post Cards
   ========================================================================== */

.posts-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.post-card {
    padding: var(--space-8);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.post-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.post-card.featured {
    background: var(--gradient-subtle);
    border-color: var(--color-accent);
    border-width: 2px;
    position: relative;
    overflow: hidden;
}

.post-card.featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

[data-theme="dark"] .post-card.featured {
    background: var(--gradient-subtle);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.post-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.post-category {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: white;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Different colors for different category types */
.post-category[data-category="leadership"],
.post-category:nth-child(1) {
    background: var(--gradient-primary);
}

.post-category[data-category="technical"] {
    background: var(--gradient-cool);
}

.post-category[data-category="management"] {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-warm) 100%);
}

.post-category[data-category="career"] {
    background: var(--gradient-warm);
}

.post-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.post-title a {
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
}

.post-title a:hover {
    color: var(--color-accent);
}

.post-excerpt {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-6);
}

.post-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border-light);
}

.read-time {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-accent);
}

.read-more::after {
    content: '\2192';
    transition: transform var(--transition-fast);
}

.read-more:hover::after {
    transform: translateX(4px);
}

/* ==========================================================================
   Pagination
   ========================================================================== */

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-top: var(--space-8);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(.disabled) {
    color: var(--color-text-primary);
    background-color: var(--color-bg-tertiary);
}

.pagination-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.pagination-numbers {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.pagination-numbers a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.pagination-numbers a:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.pagination-numbers a.active {
    background-color: var(--color-accent);
    color: white;
}

.pagination-ellipsis {
    color: var(--color-text-muted);
    padding: 0 var(--space-2);
}

/* ==========================================================================
   Sidebar
   ========================================================================== */

.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.sidebar-card {
    padding: var(--space-6);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.sidebar-card h3 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

/* About Card */
.about-card {
    text-align: center;
}

.about-avatar {
    margin-bottom: var(--space-4);
    position: relative;
    display: inline-block;
}

.about-avatar::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 118px;
    height: 118px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    z-index: 0;
}

.avatar-placeholder {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 90px;
    height: 90px;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: white;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.avatar-image {
    position: relative;
    z-index: 1;
    width: 110px;
    height: 110px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 4px solid var(--color-bg-card);
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.about-avatar:hover .avatar-image {
    transform: scale(1.05);
}

.about-avatar:hover::before {
    box-shadow: 0 6px 24px rgba(37, 99, 235, 0.5);
}

.about-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-4);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--color-text-tertiary);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    color: var(--color-accent);
    background-color: var(--color-accent-subtle);
}

/* Search */
.search-box {
    display: flex;
    gap: var(--space-2);
}

.search-box input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.search-box input::placeholder {
    color: var(--color-text-muted);
}

.search-box button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    padding: 0;
    color: white;
    background-color: var(--color-accent);
    border: none;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.search-box button:hover {
    background-color: var(--color-accent-hover);
}

/* Tag Cloud */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tag {
    display: inline-block;
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.tag:hover {
    color: white;
    background: var(--gradient-primary);
    border-color: transparent;
    transform: translateY(-1px);
}

.tag:nth-child(2):hover {
    background: var(--gradient-cool);
}

.tag:nth-child(3):hover {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
}

.tag:nth-child(4):hover {
    background: var(--gradient-warm);
}

.tag:nth-child(5):hover {
    background: linear-gradient(135deg, var(--color-tertiary) 0%, var(--color-secondary) 100%);
}

.tag:nth-child(6):hover {
    background: linear-gradient(135deg, var(--color-amber) 0%, var(--color-warm) 100%);
}

/* Popular Posts */
.popular-posts {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.popular-posts li a {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.popular-posts li a:hover {
    background-color: var(--color-bg-secondary);
}

.popular-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    line-height: var(--line-height-normal);
}

.popular-posts li a:hover .popular-title {
    color: var(--color-accent);
}

.popular-meta {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Advisory Card */
.advisory-card {
    position: relative;
    background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-amber-subtle) 100%);
    border: 1px solid var(--color-amber);
    overflow: hidden;
}

.advisory-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-amber) 0%, var(--color-warm) 100%);
}

.advisory-badge {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-amber-hover);
    background: var(--color-amber-light);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-3);
}

[data-theme="dark"] .advisory-badge {
    color: var(--color-amber);
    background: var(--color-amber-light);
}

.advisory-card h3 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.advisory-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-4);
}

.advisory-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-amber-hover);
    background: var(--color-amber-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.advisory-cta:hover {
    color: white;
    background: linear-gradient(135deg, var(--color-amber) 0%, var(--color-warm) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.advisory-cta svg {
    transition: transform var(--transition-fast);
}

.advisory-cta:hover svg {
    transform: translate(2px, -2px);
}

[data-theme="dark"] .advisory-card {
    background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-amber-subtle) 100%);
}

[data-theme="dark"] .advisory-cta {
    color: var(--color-amber);
}

/* Newsletter */
.newsletter-card {
    background: var(--gradient-primary);
    border: none;
}

.newsletter-card h3 {
    color: white;
}

.newsletter-card p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-4);
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.newsletter-form input {
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    background-color: rgba(255, 255, 255, 0.95);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.newsletter-form input:focus {
    outline: none;
    border-color: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.newsletter-form input::placeholder {
    color: var(--color-text-muted);
}

.newsletter-form button {
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent);
    background-color: white;
    border: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.newsletter-form button:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    margin-top: auto;
    padding: var(--space-12) 0 var(--space-8);
    background: var(--color-bg-secondary);
    border-top: 4px solid;
    border-image: var(--gradient-primary) 1;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    padding-bottom: var(--space-8);
    border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
}

.footer-brand {
    max-width: 400px;
}

.footer-name {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.footer-disclaimer {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    font-style: italic;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4) var(--space-6);
}

.footer-nav a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    padding-top: var(--space-6);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

@media (max-width: 767px) {
    .site-header .container {
        height: auto;
        flex-wrap: wrap;
        padding: var(--space-4) var(--space-4);
        gap: var(--space-4);
    }

    .header-content {
        flex: 1;
    }

    .main-nav {
        order: 3;
        width: 100%;
    }

    .main-nav ul {
        justify-content: center;
    }

    .main-content {
        padding: var(--space-8) 0;
    }

    .post-card {
        padding: var(--space-6);
    }

    .post-title {
        font-size: var(--font-size-xl);
    }

    .container {
        padding: 0 var(--space-4);
    }
}

/* ==========================================================================
   Single Post Styles (for future use)
   ========================================================================== */

.single-post-header {
    max-width: var(--content-max);
    margin: 0 auto var(--space-12);
    text-align: center;
}

.single-post-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
}

.single-post-content {
    max-width: var(--content-max);
    margin: 0 auto;
}

.single-post-content p {
    margin-bottom: var(--space-6);
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

.single-post-content h2 {
    margin: var(--space-12) 0 var(--space-6);
    font-size: var(--font-size-2xl);
}

.single-post-content h3 {
    margin: var(--space-8) 0 var(--space-4);
    font-size: var(--font-size-xl);
}

.single-post-content code {
    padding: var(--space-1) var(--space-2);
    font-family: var(--font-mono);
    font-size: 0.9em;
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
}

.single-post-content pre {
    padding: var(--space-6);
    margin: var(--space-6) 0;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    overflow-x: auto;
}

.single-post-content pre code {
    padding: 0;
    background: none;
}

.single-post-content blockquote {
    margin: var(--space-8) 0;
    padding: var(--space-6);
    padding-left: var(--space-8);
    background-color: var(--color-accent-subtle);
    border-left: 4px solid var(--color-accent);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.single-post-content blockquote p {
    margin: 0;
    font-style: italic;
    color: var(--color-text-secondary);
}

.single-post-content ul,
.single-post-content ol {
    margin: var(--space-6) 0;
    padding-left: var(--space-8);
}

.single-post-content li {
    margin-bottom: var(--space-2);
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

.single-post-content ul {
    list-style-type: disc;
}

.single-post-content ol {
    list-style-type: decimal;
}

/* ==========================================================================
   Contact Form (About Me / Contact Page)
   ========================================================================== */

#contactus {
    max-width: var(--content-max);
}

#contactus h1 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-6);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

#contactus > p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-4);
}

#divContactForm {
    margin-top: var(--space-8);
    padding: var(--space-8);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

#comment-form .form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

/* Form Group - Label + Input */
#comment-form .form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

#comment-form .form-group label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

#comment-form .form-group .required {
    color: var(--color-warm);
}

#comment-form .form-group .optional {
    font-weight: var(--font-weight-normal);
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

/* Legacy row-based form structure (backwards compatibility) */
#comment-form .form .row {
    display: flex;
    flex-direction: row-reverse;
    align-items: center;
    gap: var(--space-4);
}

/* Row containing full-width elements - use .row-full class */
#comment-form .form .row-full {
    flex-direction: column;
    align-items: stretch;
}

#comment-form .form .left {
    flex: 1;
}

#comment-form .form .right {
    min-width: 100px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

#comment-form .form .bothcols {
    width: 100%;
}

/* Form Inputs */
#comment-form input[type="text"],
#comment-form input[type="email"],
#comment-form input[type="url"],
#comment-form textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    font-family: var(--font-sans);
    color: var(--color-text-primary);
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

#comment-form input[type="text"]:focus,
#comment-form input[type="email"]:focus,
#comment-form input[type="url"]:focus,
#comment-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
    background-color: var(--color-bg-primary);
}

#comment-form input[type="text"]::placeholder,
#comment-form input[type="email"]::placeholder,
#comment-form input[type="url"]::placeholder,
#comment-form textarea::placeholder {
    color: var(--color-text-muted);
}

#comment-form textarea {
    min-height: 150px;
    resize: vertical;
    line-height: var(--line-height-relaxed);
}

/* Validation error styling */
#comment-form input.error,
#comment-form textarea.error {
    border-color: var(--color-warm);
    background-color: var(--color-warm-subtle);
}

#comment-form input.error:focus,
#comment-form textarea.error:focus {
    box-shadow: 0 0 0 3px var(--color-warm-light);
}

#comment-form label.error {
    display: block;
    margin-top: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-warm);
    font-weight: var(--font-weight-medium);
}

/* Form Actions */
.form-actions {
    padding-top: var(--space-4);
}

/* Submit Button */
.btn-submit,
.wp7button,
#comment-form input[type="button"],
#comment-form button[type="button"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-sans);
    color: white;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-submit:hover,
.wp7button:hover,
#comment-form input[type="button"]:hover,
#comment-form button[type="button"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn-submit:active,
.wp7button:active,
#comment-form input[type="button"]:active,
#comment-form button[type="button"]:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

.btn-submit .btn-icon {
    flex-shrink: 0;
}

/* Success Message */
#divThankyou,
.SuccessDiv {
    padding: var(--space-8);
    background: var(--color-tertiary-subtle);
    border: 2px solid var(--color-tertiary);
    border-radius: var(--radius-xl);
    text-align: center;
}

.success-icon {
    margin-bottom: var(--space-4);
}

.success-icon svg {
    stroke: var(--color-tertiary);
}

.success-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-tertiary);
    margin-bottom: var(--space-2);
}

.success-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

#divThankyou p,
.SuccessDiv p {
    color: var(--color-tertiary);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-2);
}

#divThankyou p:last-child,
.SuccessDiv p:last-child {
    margin-bottom: 0;
}

/* Loading Throbber */
#divThrobber,
.ThrobberDiv {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
}

#divThrobber::after,
.ThrobberDiv::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive adjustments for contact form */
@media (max-width: 640px) {
    #comment-form .form .row {
        flex-direction: column;
        align-items: flex-start;
    }

    #comment-form .form .right {
        order: -1;
        margin-bottom: var(--space-1);
    }

    #comment-form .form .left {
        width: 100%;
    }

    #divContactForm {
        padding: var(--space-6);
    }
    
    .btn-submit,
    .wp7button {
        width: 100%;
    }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Smooth transitions for theme switching */
* {
    transition: background-color var(--transition-normal),
                border-color var(--transition-normal),
                color var(--transition-fast);
}

/* Disable transitions on page load */
.preload * {
    transition: none !important;
}