/* ============================================================
   BHUSHAN LADGAONKAR — styles.css
   Sections:
   1. CSS Variables & Theming
   2. Reset & Base
   3. Accessibility
   4. Loader
   5. Animations
   6. Header & Nav
   7. Theme Switch
   8. Terminal UI
   9. Skills Grid
   10. Projects & Experience
   11. Publications Badge
   12. Certificates
   13. Contact
   14. Modal
   15. Footer Bar (Quotes + Clock)
   16. Responsive / Mobile
   ============================================================ */


/* ── 1. CSS VARIABLES & THEMING ─────────────────────────────── */
:root {
    --bg-color-light:       #f0f2f5;
    --text-color-light:     #111111;
    --accent-color-light:   #0066cc;
    --terminal-header-light:#d1d5db;

    --bg-color-dark:        #000000;
    --text-color-dark:      #e0e0e0;
    --accent-color-dark:    #00aaff;
    --terminal-header-dark: #121212;

    --bg-color:             var(--bg-color-light);
    --text-color:           var(--text-color-light);
    --accent-color:         var(--accent-color-light);
    --terminal-header-color:var(--terminal-header-light);

    /* Footer height — referenced in main padding so nothing hides behind it */
    --footer-height: 3rem;
}

body.dark-mode {
    --bg-color:             var(--bg-color-dark);
    --text-color:           var(--text-color-dark);
    --accent-color:         var(--accent-color-dark);
    --terminal-header-color:var(--terminal-header-dark);
}


/* ── 2. RESET & BASE ─────────────────────────────────────────── */
html {
    scroll-behavior: smooth;
    box-sizing: border-box;
}
*, *::before, *::after { box-sizing: inherit; }

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Fira Code', monospace;
    margin: 0;
    padding: 0;
    /* bottom padding so content never hides behind the fixed footer */
    padding-bottom: var(--footer-height);
    transition: background-color 0.3s ease, color 0.3s ease;
    font-size: 1.05em;
}


/* ── 3. ACCESSIBILITY ────────────────────────────────────────── */

/* Visible focus ring for keyboard users */
:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 4px;
    border-radius: 2px;
}

/* Skip-to-main link (visually hidden until focused) */
.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    background: var(--accent-color);
    color: var(--bg-color);
    padding: 0.5rem 1rem;
    border-radius: 0 0 4px 4px;
    font-weight: bold;
    text-decoration: none;
    z-index: 9999;
    transition: top 0.2s;
}
.skip-link:focus { top: 0; }

/* Reduced-motion: disable all transitions / animations */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}


/* ── 4. LOADER ───────────────────────────────────────────────── */
#loader {
    position: fixed;
    inset: 0;
    background-color: var(--bg-color);
    z-index: 200;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    transition: opacity 0.5s ease;
    color: var(--accent-color);
}
#loader pre {
    font-size: 1.05rem;
    line-height: 1.2;
    margin: 0;
}
#loader-status {
    font-size: 0.9rem;
    opacity: 0.7;
    letter-spacing: 0.05em;
}


/* ── 5. ANIMATIONS ───────────────────────────────────────────── */
header.unloaded, main.unloaded {
    opacity: 0;
    transform: translateY(20px);
}
header, main {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}


/* ── 6. HEADER & NAV ─────────────────────────────────────────── */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.05rem 5%;
}

.header-name {
    font-weight: bold;
    font-size: 1.4em;
    color: var(--accent-color);
    white-space: nowrap;
}

nav { display: flex; align-items: center; flex-wrap: wrap; gap: 0.25rem; }

nav a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color 0.3s ease;
    white-space: nowrap;
}
nav a:hover { color: var(--accent-color); }

.resume-link {
    color: var(--accent-color) !important;
    border: 1px solid var(--accent-color);
    padding: 2px 8px;
    border-radius: 4px;
    margin-left: 1.5rem;
    transition: all 0.3s ease;
}
.resume-link:hover {
    background-color: var(--accent-color);
    color: var(--bg-color) !important;
}


/* ── 7. THEME SWITCH ─────────────────────────────────────────── */
.theme-switcher {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 26px;
    flex-shrink: 0;
}
.switch input { display: none; }

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: #ccc;
    transition: 0.4s;
    border-radius: 26px;
}
.slider::before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}
input:checked + .slider { background-color: var(--accent-color); }
input:checked + .slider::before { transform: translateX(26px); }

/* Accessible label for screen readers */
.theme-switcher-label {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}


/* ── 8. TERMINAL UI ──────────────────────────────────────────── */
main { 
    padding: 2.1rem 5%;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - var(--footer-height) - 4.2rem);
}

.terminal-window {
    border: 1px solid var(--text-color);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    height: 80vh;
    max-width: 1400px;
    width: 100%;
}

.terminal-header {
    background-color: var(--terminal-header-color);
    padding: 0.5rem;
    border-radius: 7px 7px 0 0;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    user-select: none;
}

.terminal-buttons {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 6px;
}
/* Each button has aria-hidden in HTML — purely decorative */
.terminal-button {
    height: 12px;
    width: 12px;
    border-radius: 50%;
    display: inline-block;
}
.terminal-button.red    { background-color: #ff5f56; }
.terminal-button.yellow { background-color: #ffbd2e; }
.terminal-button.green  { background-color: #27c93f; }

/* Dynamic terminal dimensions display */
#terminal-dimensions {
    font-weight: 700;
    font-family: 'Fira Code', monospace;
}

/* ── KEY FIX: scrollable terminal body ── */
.terminal-body {
    padding: 2.5rem;
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.terminal-body h2 {
    color: var(--accent-color);
    margin-top: 0;
    margin-bottom: 1.5rem;
    border-bottom: 1px dashed rgba(128,128,128,0.3);
    padding-bottom: 0.5rem;
}
.terminal-body h2::before { content: '> '; }

section { margin-bottom: 4rem; }


/* ── 9. SKILLS GRID ──────────────────────────────────────────── */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
}
.skill-category h3 {
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 1rem;
    opacity: 0.8;
}
.skill-category ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.skill-category li { padding: 0.3rem 0; }
.skill-category li::before {
    content: "• ";
    color: var(--accent-color);
}


/* ── 10. PROJECTS & EXPERIENCE ───────────────────────────────── */
.project-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    background-color: var(--terminal-header-color);
    padding: 1.5rem;
    border-radius: 8px;
    transition: transform 0.2s ease;
}
.project-item:hover { transform: translateX(5px); }

.project-item-image {
    width: 200px;
    height: 140px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
}

.project-item-content { flex: 1; min-width: 0; }

.project-item-content h3 {
    color: var(--accent-color);
    margin: 0 0 0.5rem 0;
}

.role-date {
    font-size: 0.9em;
    font-style: italic;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.project-tags { margin: 1rem 0; }
.project-tags span {
    display: inline-block;
    border: 1px solid var(--accent-color);
    color: var(--text-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

.project-link {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--bg-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}
.project-link:hover { opacity: 0.85; }


/* ── 11. PUBLICATION BADGE ───────────────────────────────────── */
.publication-badge {
    display: inline-block;
    border: 1px dashed var(--accent-color);
    color: var(--accent-color);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.85rem;
    margin-top: 0.75rem;
}


/* ── 12. CERTIFICATES ────────────────────────────────────────── */
.certificate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}
.certificate-card {
    border: 1px solid rgba(128,128,128,0.2);
    padding: 1rem;
    border-radius: 8px;
    cursor: pointer;
    background-color: var(--terminal-header-color);
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}
.certificate-card:hover,
.certificate-card:focus-within {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}
.certificate-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 1rem;
    pointer-events: none; /* clicks handled on card */
}
.certificate-title { font-size: 0.9rem; margin: 0; }


/* ── 13. CONTACT ─────────────────────────────────────────────── */
.social-links { margin-top: 1rem; }
.social-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-right: 1.5rem;
    font-size: 1.1rem;
    border-bottom: 1px solid transparent;
    transition: color 0.3s ease, border-color 0.3s ease;
}
.social-links a:hover {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}


/* ── 14. MODAL ───────────────────────────────────────────────── */
.modal-overlay {
    display: none;
    position: fixed;
    z-index: 1000;
    inset: 0;
    background-color: rgba(0,0,0,0.85);
    justify-content: center;
    align-items: center;
}
.modal-overlay.visible { display: flex; }

.modal-content {
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 2rem;
    border: 1px solid var(--accent-color);
    width: 90%;
    max-width: 600px;
    border-radius: 8px;
    position: relative;
    text-align: center;
}
.modal-close {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 2rem;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--text-color);
    line-height: 1;
}
.modal-close:hover { color: var(--accent-color); }
.modal-image {
    max-width: 100%;
    margin-top: 1rem;
    border-radius: 4px;
}


/* ── 15. FOOTER BAR (QUOTES + CLOCK) ────────────────────────── */
#site-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--footer-height);
    background-color: var(--terminal-header-color);
    border-top: 1px solid rgba(128,128,128,0.25);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    gap: 1rem;
    z-index: 100;
    font-size: 0.78rem;
    transition: background-color 0.3s ease;
    /* Respect reduced-motion: quote fade will check this in JS */
}

/* Quote area — left side */
#footer-quote {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: var(--accent-color);
    font-style: italic;
    transition: opacity 0.6s ease;
}
#footer-quote.fading { opacity: 0; }

/* Clock area — right side */
#footer-clock {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    flex-shrink: 0;
    color: var(--text-color);
    opacity: 0.85;
    font-variant-numeric: tabular-nums; /* digits don't jitter */
}

.clock-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.3;
}
.clock-label {
    font-size: 0.65rem;
    opacity: 0.6;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.clock-time {
    font-size: 0.85rem;
    font-weight: bold;
    color: var(--accent-color);
    letter-spacing: 0.04em;
}

.clock-divider {
    opacity: 0.3;
    font-size: 1.2rem;
    align-self: center;
}

.clock-delta {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.3;
}
.clock-delta .clock-label { opacity: 0.5; }
.clock-delta .clock-time {
    font-size: 0.78rem;
    color: var(--text-color);
    opacity: 0.7;
    font-weight: normal;
}


/* ── 16. RESPONSIVE / MOBILE ─────────────────────────────────── */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
        padding-right: 4rem; /* space for theme toggle */
    }

    nav {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem 0;
    }
    nav a { margin-left: 0; margin-right: 1rem; }

    .project-item { flex-direction: column; }
    .project-item-image { width: 100%; height: auto; }

    .theme-switcher {
        position: absolute;
        top: 1rem;
        right: 1rem;
    }

    #loader pre {
        font-size: 0.45rem;
        line-height: 0.6rem;
        overflow: hidden;
    }

    /* On narrow screens, hide the quote; keep just the clock */
    #footer-quote { display: none; }

    #footer-clock { gap: 0.75rem; font-size: 0.72rem; }
    .clock-time { font-size: 0.78rem; }
}

@media (max-width: 480px) {
    .terminal-body { padding: 1.25rem; }
    main { padding: 1rem 3%; }
}