/* =====================================
   Shared CSS styles
   ===================================== */

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

:root {
    /* Color Palette */
    /* Whites */
    --color-bg: #fafaf9;
    --color-surface: #ffffff;
    --color-border: #e7e5e4;
    --color-subtle: #f5f5f4;
    /* Blacks */
    --color-dark: #0a0a0a;
    --color-charcoal: #2a2a2a;
    /* Greys */
    --color-slate: #4a5568;
    --color-muted: #a1a1aa;
    /* Accents */
    --color-accent: #ea580c;
    --color-accent-light: #fb923c;
    --color-accent-dark: #c2410c;

    /* Typography*/
    --font-display: 'Source Serif 4', Georgia, serif;
    --font-body: 'Source Sans 3', system-ui, sans-serif;

    /* Spacing Scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;

    /* Layout */
    --container-width: 1200px;
    --container-narrow: 800px;

    /* Effects */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--color-charcoal);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body a {
    color: var(--color-accent-dark);
}

/* =====================================
   Buttons
   ===================================== */

.button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-dark);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: all var(--transition-base);
    border: 2px solid var(--color-dark);
}

.button-primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.button-secondary {
    background: var(--color-subtle);
    color: var(--color-charcoal);
    border-color: var(--color-muted);
}

.button:hover,
.button:focus {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.button:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

.button-icon {
    font-size: 1.2rem;
    transition: transform var(--transition-base);
}

.button:hover .button-icon {
    transform: translateX(4px);
}

/* =====================================
   Skip Link
   ===================================== */

.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-dark);
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    z-index: 100;
    font-weight: 500;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
}

/* =====================================
   Typography
   ===================================== */

/* Source Serif 4 - Regular */
@font-face {
 font-display: swap;
 font-family: 'Source Serif 4';
 font-style: normal;
 font-weight: 400;
 src: url('../fonts/source-serif-4-v14-latin-regular.woff2') format('woff2');
}

/* Source Serif 4 - Italic (600) */
@font-face {
  font-display: swap;
  font-family: 'Source Serif 4';
  font-style: italic;
  font-weight: 600;
  src: url('../fonts/source-serif-4-v14-latin-600italic.woff2') format('woff2'); /* Chrome 36+, Opera 23+, Firefox 39+, Safari 12+, iOS 10+ */
}

/* Source Sans 3 - Regular */
@font-face {
  font-display: swap;
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 400;
  src: url('../fonts/source-sans-3-v19-latin-regular.woff2') format('woff2');
}

/* Source Sans 3 - Italic */
@font-face {
  font-display: swap;
  font-family: 'Source Sans 3';
  font-style: italic;
  font-weight: 400;
  src: url('../fonts/source-sans-3-v19-latin-italic.woff2') format('woff2');
}

/* Source Sans 3 - Bold (500) */
@font-face {
  font-display: swap;
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 500;
  src: url('../fonts/source-sans-3-v19-latin-500.woff2') format('woff2');
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    line-height: 1.1;
    font-weight: 400;
    color: var(--color-dark);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 5rem);
    margin-bottom: var(--space-md);
}

h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: var(--space-lg);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--space-sm);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}


li {
    margin-bottom: var(--space-xs);
}

strong {
    font-weight: 500;
    color: var(--color-dark);
}

.italic {
    font-style: italic;
    position: relative;
    color: var(--color-accent);
}

p {
    margin-bottom: var(--space-sm);
}


.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-slate);
    max-width: 800px;
    margin: 0 auto;
    margin-bottom: var(--space-lg);
}


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

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

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
}

/*  =====================================
    Header & Navigation
    ===================================== */

header {
   position: sticky;
   top: 0;
   background-color: rgba(250, 250, 249, 0.95);
   backdrop-filter: blur(10px);
   z-index: 50;
   border-bottom: 1px solid var(--color-border);
}

.nav-container {
   max-width: var(--container-width);
   margin: 0 auto;
   padding: var(--space-md) var(--space-lg);
   display: flex;
   justify-content: space-between;
   align-items: center;
}

.nav-logo {
   font-family: var(--font-display);
   font-size: 1.25rem;
   color: var(--color-dark);
   text-decoration: none;
   display: flex;
   transition: all var(--transition-base);
   gap: 1rem;
}

.nav-logo img{
  max-width: 32px;
}

.nav-menu {
   display: flex;
   list-style: none;
   gap: var(--space-lg);
   align-items: center;
}

.nav-menu li {
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-menu a {
   color: var(--color-charcoal);
   text-decoration: none;
   font-size: 1rem;
   position: relative;
   transition: color var(--transition-base);
   letter-spacing: 0.02em;
}

.nav-menu a::after {
   content: '';
   position: absolute;
   bottom: -4px;
   left: 0;
   width: 0;
   height: 1px;
   background-color: var(--color-accent);
   transition: width var(--transition-base);
}

.nav-menu a:hover,
.nav-menu a:focus {
   color: var(--color-accent);
}

.nav-menu a:hover::after,
.nav-menu a:focus::after {
   width: 100%;
}

.nav-menu a:focus {
   outline: 2px solid var(--color-accent);
   outline-offset: 6px;
}

/*  =====================================
    Mobile Menu Toggle
    ===================================== */

.nav-controls {
  height: 32px;
   display: flex;
   align-items: center;
   gap: var(--space-md);
}

.menu-toggle {
  height: 32px;
  width: 32px;
   display: none;
   flex-direction: column;
   background: transparent;
   border: none;
   cursor: pointer;
   padding: 0.5rem;
   gap: 5px;
   justify-content: center;
   align-items: center;
}

.hamburger {
   width: 24px;
   height: 2px;
   background-color: var(--color-dark);
   transition: all var(--transition-base);
   display: block;
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 73px;
        right: -100%;
        width: 100%;
        max-width: 300px;
        background-color: var(--color-surface);
        flex-direction: column;
        padding: var(--space-lg);
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-slow);
        gap: var(--space-md);
        border-left: 1px solid var(--color-border);
    }

    .nav-menu.active {
        right: 0;
    }

    .menu-toggle {
        display: flex;

    }

    .menu-toggle[aria-expanded="true"] .hamburger:nth-child(1) {
        transform: rotate(45deg) translate(4px, 4px);
    }

    .menu-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle[aria-expanded="true"] .hamburger:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
}


/*  =====================================
    Dark Mode Toggle Switch
    ===================================== */


.theme-toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
    cursor: pointer;
    flex-shrink: 0;
}

.theme-toggle-checkbox {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.theme-toggle-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-muted);
    border-radius: 30px;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    padding: 0 4px;
}

.theme-toggle-slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 4px;
    background-color: white;
    border-radius: 50%;
    transition: all var(--transition-base);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.theme-toggle-icon {
    font-size: 1rem;
    position: absolute;
    right: 8px;
    transition: all var(--transition-base);
    z-index: 1;
    line-height: 1;
}

.theme-toggle-icon::before {
    content: '';
    display: block;
    width: 16px;
    height: 16px;
    background-image: url('icons/Sun.svg');
    background-size: contain;
    background-repeat: no-repeat;
}

.theme-toggle-checkbox:checked + .theme-toggle-slider .theme-toggle-icon::before {
    background-image: url('icons/Moon.svg');
}

/* Checked state (dark mode) */
.theme-toggle-checkbox:checked + .theme-toggle-slider {
    color: var(--color-accent);
}

.theme-toggle-checkbox:checked + .theme-toggle-slider::before {
    transform: translateX(30px);
}

.theme-toggle-checkbox:checked + .theme-toggle-slider .theme-toggle-icon {
    right: auto;
    left: 8px;
}

/* Hover effects */
.theme-toggle-switch:hover .theme-toggle-slider {
    background-color: var(--color-muted);
}

.theme-toggle-checkbox:checked + .theme-toggle-slider:hover {
    background-color: var(--color-accent-light);
}

/* Focus state for accessibility */
.theme-toggle-checkbox:focus + .theme-toggle-slider {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Dark mode adjustments */
body.dark-mode .theme-toggle-slider {
    background-color: var(--color-slate);
}

body.dark-mode .theme-toggle-slider::before {
    background-color: var(--color-bg);
}

@media (max-width: 480px) {
    .nav-controls {
        gap: var(--space-sm);
    }

    .theme-toggle-switch {
        width: 60px;
        height: 32px;
    }

    .theme-icon {
        font-size: 1rem;
    }
}



/* =====================================
   Contact Section
   ===================================== */

.contact-section {
    padding: var(--space-3xl) 0;
    text-align: center;
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-description {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-slate);
    margin-bottom: var(--space-xl);
}

.contact-methods {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.contact-location {
    color: var(--color-slate);
    font-size: 0.95rem;
}

.location-marker {
    font-style: normal;
}

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

footer {
    background: #1a1a1a;
    color: #a1a1aa;
    padding: var(--space-xl) 0;
}

body.dark-mode footer {
    background: #0a0a0a;
    color: #a1a1aa;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: var(--space-lg);
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
}

.footer-tagline {
    font-size: 0.95rem;
    color: white;
    margin-bottom: var(--space-xs);
}

.footer-copyright {
    font-size: 0.85rem;
}

.footer-note {
    font-size: 0.8rem;
    text-align: right;
}

@media (max-width: 768px) {
    .footer-note {
        text-align: left;
    }
}

/* =====================================
   Animations
   ===================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* =====================================
   Focus Styles
   ===================================== */

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

/* =====================================
   Print Styles
   ===================================== */

@media print {
    header,
    footer,
    .menu-toggle,
    .contact-methods {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .work-card,
    .principle {
        break-inside: avoid;
    }
}

/* =====================================
   Dark Mode (Manual Toggle + System Preference)
   ===================================== */

/* Apply dark mode via class OR system preference */
body.dark-mode,
body:not(.light-mode):not(.dark-mode) {
    /* Only apply if user hasn't made a choice AND system prefers dark */
}

@media (prefers-color-scheme: dark) {
    body:not(.light-mode):not(.dark-mode) {
        --color-bg: #0a0a0a;
        --color-surface: #1a1a1a;
        --color-dark: #fafaf9;
        --color-charcoal: #e7e5e4;
        --color-slate: #a8a29e;
        --color-border: #292524;
        --color-subtle: #1c1917;
    }

    body:not(.light-mode):not(.dark-mode) header {
        background-color: rgba(10, 10, 10, 0.95);
    }

    body:not(.light-mode):not(.dark-mode) .work-image-placeholder,
    body:not(.light-mode):not(.dark-mode) .tag {
        opacity: 0.9;
    }

    body:not(.light-mode):not(.dark-mode) .tag {
        background: var(--color-subtle);
        border-color: var(--color-border);
    }

    body:not(.light-mode):not(.dark-mode) .principle {
        background: var(--color-subtle);
    }

    body:not(.light-mode):not(.dark-mode) .skills-section {
        background: #0a0a0a;
    }

    body:not(.light-mode):not(.dark-mode) .timeline::before {
        background: var(--color-border);
    }

    body:not(.light-mode):not(.dark-mode) .timeline-date::after {
        border-color: var(--color-bg);
    }
}

/* Manual dark mode (takes precedence over system preference) */
body.dark-mode {
    --color-bg: #0a0a0a;
    --color-surface: #1a1a1a;
    --color-dark: #fafaf9;
    --color-charcoal: #e7e5e4;
    --color-slate: #a8a29e;
    --color-border: #292524;
    --color-subtle: #1c1917;
}

body.dark-mode header {
    background-color: rgba(10, 10, 10, 0.95);
}

body.dark-mode .work-image-placeholder,
body.dark-mode .tag {
    opacity: 0.9;
}

body.dark-mode .tag {
    background: var(--color-subtle);
    border-color: var(--color-border);
}

body.dark-mode .principle {
    background: var(--color-subtle);
}

body.dark-mode .skills-section {
    background: #0a0a0a;
}

body.dark-mode .timeline::before {
    background: var(--color-border);
}

body.dark-mode .timeline-date::after {
    border-color: var(--color-bg);
}