/* CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

@font-face {
    font-family: 'Tabular';
    src: url("Tabular-Variable.ttf");
    font-display: swap;
}

/* Variables */
:root {
    /* Dark theme variables (default) */
    --bg-color: #1a1a1a;
    --content-bg-color: #2a2a2a;
    --text-primary: #e0e0e0;
    --text-secondary: #999;
    --accent-color: #f26522;
    --text-on-accent: #f5f5f5;
    --drawing-stroke: #f5f5f5;
    --border-color: #444;
    --border-color-accent: #f5f5f5;
    font-family: 'Tabular', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

/* Light theme variables */
[data-theme="light"] {
    --bg-color: #f5f0e9;
    --content-bg-color: #f9f3e8;
    --text-primary: #1a1a1a;
    --text-secondary: #7a7a7a;
    --accent-color: #f26522;
    --text-on-accent: #1a1a1a;
    --drawing-stroke: #1a1a1a;
    --border-color: #e0d9cf;
    --border-color-accent: #1a1a1a;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 1rem;
}

a {
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-color: var(--accent-color);
    text-underline-offset: 3px;
    transition: all 0.3s ease;
}

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

a:visited {
    color: var(--text-primary);
    text-decoration-color: var(--accent-color);
}

* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body {
    background-color: var(--bg-color);
    scrollbar-width: none;
    -ms-overflow-style: none;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('pattern.png');
    background-repeat: repeat;
    opacity: 1;
    z-index: -1;
}

[data-theme="light"] body::before {
    opacity: 0.3;
}

body::-webkit-scrollbar {
    display: none;
}

header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--content-bg-color);
    padding: 1rem;
    display: flex;
    flex-direction: row;
    align-items: center;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
    height: 4rem;
    svg {
        color: var(--accent-color);
        height: 4rem;
    }
}

.lander {
    height: 100vh;
    width: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: transparent;
}

.bird {
    height: 4rem;
    position: absolute;
    top: -2.7rem;
    right: -0.5rem;
    pointer-events: none;
}

.bird-path {
    stroke: var(--accent-color);
    stroke-width: 4;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    animation: draw 2s ease-in-out forwards; /* 8s / 1.9 = 4.21s */
}

@keyframes draw {
    0% {
        stroke-dashoffset: 2000;
    }
    100% {
        stroke-dashoffset: 0;
    }
}

.lander-nav {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    width: 80vw;
    max-width: 500px;
    margin-top: 4rem;
}

.nav-step {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background-color: transparent;
    border-radius: 0;
    text-decoration: none;
    color: var(--text-primary);
    border: none;
    transition: all 0.3s ease;
    box-shadow: none;
    width: fit-content;
}

.nav-step-1 {
    align-self: flex-start;
}

.nav-step-2 {
    align-self: flex-end;
}

.nav-step-3 {
    align-self: flex-start;
    margin-left: 3rem;
}

.nav-step-4 {
    align-self: flex-end;
    margin-right: 2rem;
}

.nav-step:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
}

.nav-number {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-color);
}

.nav-step:hover .nav-number {
    color: var(--accent-color);
}

.nav-step:active,
.nav-step:focus {
    color: var(--accent-color);
    outline: none;
}

.nav-step:active .nav-number,
.nav-step:focus .nav-number {
    color: var(--accent-color);
}

.nav-label {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.lander-title {
    text-align: center;
    margin-bottom: 2rem;
}

.lander-title h1 {
    font-size: 3rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
}

.surname {
    position: relative;
}

.lander-title p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

@media (max-width: 768px) {
    .lander-nav {
        gap: 1.5rem;
        width: 90vw;
        max-width: 400px;
    }
    
    .nav-step-1 {
        align-self: flex-start;
        margin-left: 0;
    }
    
    .nav-step-2 {
        align-self: flex-end;
        margin-right: 0;
    }
    
    .nav-step-3 {
        align-self: flex-start;
        margin-left: 1.5rem;
    }
    
    .nav-step-4 {
        align-self: flex-end;
        margin-right: 1rem;
    }
    
    .lander-nav {
        margin-top: 2rem;
    }
    
    .lander-title h1 {
        font-size: 2.2rem;
    }
    
    .lander-title p {
        font-size: 1rem;
    }
}

.navlink {
    cursor: pointer;
    margin-left: 1.25rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    white-space: nowrap;
    &:hover, .selected {
        color: var(--accent-color);
    }

}

.main-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

section {
    background-color: var(--content-bg-color);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    border-radius: 0;
    width: 80vw;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
    h1 {
        font-size: 2rem;
        color: var(--text-primary);
        margin-bottom: 1rem;
        margin-top: 1rem;
    }
    h2 {
        color: var(--text-primary);
        font-weight: 600;
    }
    h3 {
        color: var(--text-primary);
        font-weight: 600;
    }
    span {
        color: var(--text-secondary);
    }
    p {
        color: var(--text-primary);
        margin-bottom: 1rem;
    }
    .section-title {
        display: inline-block;
        margin-top: 1rem;
        margin-bottom: 1rem;
        &:before {
            content: '> ';
            color: var(--accent-color);
        }
    }

    &:hover {
        box-shadow: 0 5px 15px rgba(242,101,34,0.2);;
    }
}

.section-content {
    padding-left: 1rem;
    padding-right: 1rem;
}

.two-column {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr auto;
    width: 100%;
}

.column-rhs {
    border-radius: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    min-height: fit-content;
    img {
        border-radius: 0;
        border: 2px solid var(--drawing-stroke);
        width: 180px;
        height: 180px;
        object-fit: cover;
        object-position: center;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }
}

@media (max-width: 650px) {
    .two-column {
        grid-template-columns: 1fr;
    }
    
    .column-rhs {
        padding: 1.5rem;
        img {
            width: 250px;
            height: 250px;
        }
    }
}

.rhs-details {
    width: auto;
    padding-left: 0.5rem;
    display: flex;
    flex-direction: column;
    span {
        height: 100%;
        width: fit-content;
        padding-right: 0.5rem;
        align-content: center;
        border-right: 1px solid var(--drawing-stroke);
        color: var(--text-on-accent);
        white-space: nowrap;
        svg {
            stroke: var(--drawing-stroke);
            height: 100%;
            width: 1rem;
            vertical-align: middle;
        }
    }
    span.middle-detail {
        border-top: 1px solid var(--drawing-stroke);
        border-bottom: 1px solid var(--drawing-stroke);
    }
}

.rhs-image {
    max-width: 45%;
    svg {
        vertical-align: middle;
        width: 100%;
    }
}

/* Timeline section styling */
.timeline-entry {
    margin-bottom: 2rem;
}

.timeline-entry h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    margin-bottom: 1rem;
    padding-bottom: 0.3rem;
    text-decoration: underline;
    text-decoration-color: var(--accent-color);
    text-decoration-thickness: 2px;
    text-underline-offset: 0.4rem;
}

.position {
    margin-bottom: 1.5rem;
}

.position h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    letter-spacing: 0.02em;
}

.dates {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
}

.position p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

.theme-toggle-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 0;
    margin-bottom: 2rem;
    gap: 1rem;
}

.theme-toggle-container label {
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.1em;
    font-size: 0.9rem;
    cursor: pointer;
    transition: color 0.3s ease;
}

.theme-toggle-container label:hover {
    color: var(--accent-color);
}

#footer-checkbox {
    appearance: none;
    width: 3rem;
    height: 1.5rem;
    background-color: var(--content-bg-color);
    border: 2px solid var(--border-color);
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
}

#footer-checkbox:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 1px var(--accent-color);
}

#footer-checkbox:checked {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

#footer-checkbox::before {
    content: '';
    position: absolute;
    top: 1px;
    left: 1px;
    width: 1rem;
    height: 1rem;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color-accent);
}

#footer-checkbox:checked::before {
    transform: translateX(1.625rem);
    background-color: var(--text-on-accent);
    border-color: var(--text-on-accent);
}

#footer-checkbox:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px var(--accent-color);
}