/* ===================================
   ChristopherMcDowell.com
   Apple-inspired personal site
   =================================== */

:root {
    /* Light theme (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --bg-card: #ffffff;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-tertiary: #86868b;
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --border: #d2d2d7;
    --shadow: rgba(0, 0, 0, 0.04);
    --shadow-hover: rgba(0, 0, 0, 0.08);
    --nav-bg: rgba(255, 255, 255, 0.72);
    --hero-gradient: linear-gradient(180deg, #f5f5f7 0%, #ffffff 100%);
    --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.1);
    --youtube-red: #ff0000;
    --transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

[data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-card: #1c1c1e;
    --text-primary: #f5f5f7;
    --text-secondary: #a1a1a6;
    --text-tertiary: #86868b;
    --accent: #2997ff;
    --accent-hover: #47a3ff;
    --border: #38383d;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.5);
    --nav-bg: rgba(0, 0, 0, 0.72);
    --hero-gradient: linear-gradient(180deg, #1c1c1e 0%, #000000 100%);
    --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    --card-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.5);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition), color var(--transition);
}

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

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

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navigation ===== */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--border);
    transition: background var(--transition);
}

.nav-container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 52px;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-logo:hover {
    color: var(--text-primary);
    opacity: 0.7;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 28px;
    align-items: center;
}

.nav-links a {
    font-size: 0.8125rem;
    font-weight: 400;
    color: var(--text-secondary);
    transition: color var(--transition);
    letter-spacing: 0.01em;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.theme-btn {
    font-size: 1.1rem !important;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition) !important;
}

.theme-btn:hover {
    opacity: 1;
    color: var(--text-primary) !important;
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--text-primary);
    transition: transform var(--transition), opacity var(--transition);
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--hero-gradient);
    padding: 80px 24px 40px;
    position: relative;
}

.hero-content {
    max-width: 1080px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-text {
    flex: 1;
}

.hero-greeting {
    font-size: 1.125rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 8px;
    letter-spacing: 0.02em;
}

.hero-name {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-weight: 400;
}

.hero-description {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    max-width: 520px;
    line-height: 1.7;
    margin-bottom: 32px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero visual - photo */
.hero-visual {
    flex-shrink: 0;
}

.hero-photo-wrap {
    width: 260px;
    height: 260px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15), 0 0 0 4px var(--bg-primary), 0 0 0 6px var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
}

.hero-photo-wrap:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 16px 56px rgba(0, 0, 0, 0.2), 0 0 0 4px var(--bg-primary), 0 0 0 6px var(--accent);
}

.hero-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.4;
    animation: fadeInUp 1s ease 1s both;
}

.scroll-indicator span {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-tertiary);
}

.scroll-arrow {
    width: 1px;
    height: 30px;
    background: var(--text-tertiary);
    position: relative;
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); opacity: 0.4; }
    50% { transform: translateY(8px); opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 0.4; transform: translateY(0); }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 980px;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: scale(1.02);
}

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 1.5px solid var(--accent);
}

.btn-secondary:hover {
    background: var(--accent);
    color: #fff;
}

.btn-youtube {
    background: var(--youtube-red);
    color: #fff;
    font-size: 1rem;
    padding: 14px 28px;
}

.btn-youtube:hover {
    background: #cc0000;
    color: #fff;
    transform: scale(1.02);
}

.btn-icon {
    width: 18px;
    height: 18px;
}

/* ===== Sections ===== */
.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    text-align: center;
    margin-bottom: 8px;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 56px;
}

/* ===== About Grid ===== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.about-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 36px 32px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.about-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.about-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.about-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== Smart Home ===== */
.smarthome-intro {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 48px;
}

.smarthome-intro p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.smarthome-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.sh-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 32px 28px;
    text-align: center;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
}

.sh-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.sh-icon {
    font-size: 2.25rem;
    margin-bottom: 16px;
}

.sh-card h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.sh-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ===== Apple Ecosystem ===== */
.apple-intro {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 48px;
}

.apple-intro p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.apple-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.apple-item {
    text-align: center;
    padding: 36px 24px;
    background: var(--bg-secondary);
    border-radius: 20px;
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
}

[data-theme="dark"] .apple-item {
    background: var(--bg-card);
}

.apple-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.apple-item-icon {
    color: var(--accent);
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
}

.apple-item h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.apple-item p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== YouTube ===== */
.youtube-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.youtube-intro p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 28px;
}

.youtube-embed {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border);
}

.youtube-embed iframe {
    display: block;
    aspect-ratio: 16 / 9;
    height: auto;
}

/* ===== Contact ===== */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 28px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.contact-link:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.contact-link:hover svg {
    fill: #fff;
    stroke: #fff;
}

.contact-form {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 36px;
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.9375rem;
    font-family: inherit;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-status {
    margin-top: 12px;
    font-size: 0.875rem;
    color: var(--accent);
    min-height: 20px;
}

/* ===== Footer ===== */
.footer {
    padding: 40px 0;
    border-top: 0.5px solid var(--border);
    background: var(--bg-primary);
}

.footer-content {
    text-align: center;
}

.footer-content p {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.footer-tagline {
    margin-top: 4px;
}

/* ===== Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .smarthome-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .apple-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .youtube-section {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .contact-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 52px;
        left: 0;
        right: 0;
        background: var(--nav-bg);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 0.5px solid var(--border);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .section {
        padding: 72px 0;
    }

    .section-subtitle {
        margin-bottom: 40px;
    }

    .smarthome-grid {
        grid-template-columns: 1fr;
    }

    .apple-grid {
        grid-template-columns: 1fr;
    }

    .hero-photo-wrap {
        width: 180px;
        height: 180px;
    }

    .contact-form {
        padding: 24px;
    }
}