/* ===================================
   Dark Mode (System Preference)
   =================================== */
/* Dark theme tokens — applied via explicit toggle (data-theme="dark") */
:root[data-theme="dark"] {
    --color-bg:            #1A1714;
    --color-bg-alt:        #211E1B;
    --color-ink:           #F0EDE7;
    --color-ink-secondary: #A09890;
    --color-accent:        #E07A4A;
    --color-border:        #3A3530;
}

:root[data-theme="dark"] .profile-photo {
    filter: sepia(12%) contrast(0.98) brightness(0.95);
}

:root[data-theme="dark"] .footer {
    background-color: #111009;
}

/* …or via system preference, unless the user has explicitly chosen light */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg:            #1A1714;
        --color-bg-alt:        #211E1B;
        --color-ink:           #F0EDE7;
        --color-ink-secondary: #A09890;
        --color-accent:        #E07A4A;
        --color-border:        #3A3530;
    }

    :root:not([data-theme="light"]) .profile-photo {
        filter: sepia(12%) contrast(0.98) brightness(0.95);
    }

    :root:not([data-theme="light"]) .footer {
        background-color: #111009;
    }
}

/* ===================================
   Reduced Motion
   =================================== */
@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;
    }
}

/* ===================================
   High Contrast
   =================================== */
@media (prefers-contrast: high) {
    :root {
        --color-ink: #000000;
        --color-bg: #ffffff;
        --color-border: #000000;
    }

    .skill-tag,
    .experience-row,
    .podcast-row,
    .education-row,
    .social-link,
    .pillar,
    .journal-entry {
        border-color: currentColor;
    }
}

/* ===================================
   Tablet — 900px and below
   =================================== */
@media (max-width: 900px) {
    :root {
        --font-size-5xl: 2.75rem;
        --font-size-4xl: 2rem;
        --spacing-4xl: 4rem;
    }

    /* Two-column editorial collapses to single */
    .section-layout,
    .about-layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .section-header,
    .about-header {
        position: static;
    }

    .section-label {
        font-size: var(--font-size-xs);
    }

    /* Hero */
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .hero-image {
        order: -1;
        justify-content: center;
    }

    .profile-photo {
        width: 220px;
        height: 220px;
    }

    .hero-subtitle {
        max-width: 100%;
    }

    /* Stats */
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-xl);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        z-index: 100;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-link {
        font-size: var(--font-size-lg);
    }

    .nav-toggle {
        display: flex;
        z-index: 200;
        position: relative;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(4.5px, 4.5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(4.5px, -4.5px);
    }

    /* Experience & Education grids */
    .experience-row,
    .education-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    /* Contact */
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    /* Work — pillars stack */
    .pillars-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .work-header {
        margin-bottom: var(--spacing-2xl);
    }
}

/* ===================================
   Mobile — 480px and below
   =================================== */
@media (max-width: 480px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 1.75rem;
        --font-size-2xl: 1.375rem;
        --spacing-4xl: 3rem;
        --spacing-3xl: 2.5rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .nav-container {
        padding: var(--spacing-md);
    }

    .hero {
        padding-top: calc(var(--spacing-3xl) + 60px);
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-cta .btn {
        text-align: center;
    }

    .hero-pillars {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .profile-photo {
        width: 200px;
        height: 200px;
    }

    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }

    .experience-row,
    .education-row {
        padding: var(--spacing-lg) 0;
    }

    .podcast-row {
        padding: var(--spacing-lg) 0;
    }

    .scroll-top {
        bottom: 1rem;
        right: 1rem;
    }
}

/* ===================================
   Large Desktop — 1400px+
   =================================== */
@media (min-width: 1400px) {
    :root {
        --container-max-width: 1300px;
    }
}

/* ===================================
   Print
   =================================== */
@media print {
    .nav,
    .hero-cta,
    .contact-form-container,
    .scroll-top,
    .btn {
        display: none;
    }

    body {
        font-size: 11pt;
        line-height: 1.5;
        color: black;
        background: white;
    }

    .section {
        page-break-inside: avoid;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 0.85em;
        color: #555;
    }
}