/* ==========================================================================
   Moon Landing — Shared Base Stylesheet
   Designed by Tycho — Software Developer & Interface Architect
   Techy/Dark Aerospace Theme
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
    /* Background layers */
    --bg-deep:        #05060a;
    --bg-primary:     #0a0b10;
    --bg-secondary:   #0f1118;
    --bg-card:        #13151d;
    --bg-card-hover:  #1a1c28;
    --bg-elevated:    #1e2030;

    /* Accent — Cyan / Teal */
    --accent:         #00d4ff;
    --accent-dim:     #0098b8;
    --accent-glow:    rgba(0, 212, 255, 0.15);
    --accent-glow-strong: rgba(0, 212, 255, 0.3);

    /* Secondary accent — Amber */
    --accent2:        #ffb800;
    --accent2-dim:    #b88400;

    /* Text */
    --text-primary:   #e8eaed;
    --text-secondary: #9aa0b0;
    --text-muted:     #5a6072;
    --text-bright:    #ffffff;

    /* Borders */
    --border:         #1e2030;
    --border-accent:  rgba(0, 212, 255, 0.2);

    /* Fonts */
    --font-mono:      'JetBrains Mono', 'Fira Code', monospace;
    --font-sans:      'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    height: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.footer {
    margin-top: auto;
}

::selection {
    background: var(--accent);
    color: var(--bg-deep);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--text-bright);
}

img {
    max-width: 100%;
    display: block;
}

/* ---------- Stars Canvas ---------- */
#stars-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ---------- Container ---------- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ---------- Navigation ---------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) 0;
    transition: background 0.3s, backdrop-filter 0.3s;
}

.nav.scrolled {
    background: rgba(5, 6, 10, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-bright);
    letter-spacing: -0.3px;
    white-space: nowrap;
}

.nav-logo-image {
    display: block;
    width: auto;
    height: 97px;
    image-rendering: -webkit-optimize-contrast;
}

.nav-logo .accent {
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.2s;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.3s var(--ease-out);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Dropdown menu */
.dropdown {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.dropbtn {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.2s;
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.dropbtn:hover,
.dropbtn.active {
    color: var(--accent);
}

.dropbtn::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.3s var(--ease-out);
}

.dropbtn:hover::after,
.dropbtn.active::after {
    width: 100%;
}

.dropdown-content::before {
    content: '';
    position: absolute;
    top: -14px;
    left: 0;
    width: 100%;
    height: 14px;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: calc(100% + 14px);
    left: 0;
    padding: 8px 0;
    background: rgba(10, 11, 16, 0.96);
    backdrop-filter: blur(18px);
    min-width: max-content;
    width: max-content;
    max-width: min(92vw, 420px);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
    z-index: 1;
    border: 1px solid var(--border);
    border-radius: 4px;
}

.dropdown-content a {
    color: var(--text-secondary);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
    transition: background-color 0.2s, color 0.2s;
}

.dropdown-content a:hover {
    background-color: var(--bg-secondary);
    color: var(--accent);
}

.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content {
    display: block;
}

/* Mobile nav toggle */
.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    transition: all 0.3s;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(5, 6, 10, 0.95);
    backdrop-filter: blur(20px);
    z-index: 99;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 12px;
    overflow-y: auto;
    padding: 88px 24px 32px;
}

.mobile-menu.open {
    display: flex;
}

.mobile-link {
    display: block;
    width: min(100%, 460px);
    margin: 0 auto;
    padding: 14px 18px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    border: 1px solid rgba(30, 32, 48, 0.9);
    border-radius: var(--radius-sm);
    background: rgba(19, 21, 29, 0.72);
    text-align: left;
    transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.mobile-link:hover {
    color: var(--accent);
    border-color: var(--accent-dim);
    background: rgba(19, 21, 29, 0.92);
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-mobile-toggle { display: flex; }
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-deep);
}

.btn-primary:hover {
    background: var(--text-bright);
    color: var(--bg-deep);
    box-shadow: 0 0 30px var(--accent-glow-strong);
}

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent-dim);
}

.btn-outline:hover {
    background: var(--accent-glow);
    color: var(--text-bright);
    border-color: var(--accent);
}

/* ---------- Sections ---------- */
.section {
    position: relative;
    z-index: 1;
    padding: var(--space-4xl) 0;
}

.section-alt {
    background: transparent;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: var(--space-2xl);
    letter-spacing: -0.5px;
}

.section-intro {
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: var(--space-2xl);
    line-height: 1.8;
}

/* ---------- Footer ---------- */
.footer {
    position: relative;
    z-index: 1;
    padding: var(--space-3xl) 0 0;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr;
    gap: var(--space-lg);
    padding-bottom: var(--space-2xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-name {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 1px;
}

.footer-tagline {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 340px;
}

.footer-credit {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: var(--space-md);
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col-heading {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.footer-link {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-link:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: var(--space-lg) 0;
    text-align: center;
}

.footer-bottom p {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
}

@media (max-width: 1200px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: var(--space-lg);
    }
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr 1fr;
        gap: var(--space-lg);
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

/* ---------- Assistant Chatbot Widget ---------- */
.assistant-widget {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
    user-select: none;
}

.assistant-widget.dragging {
    cursor: grabbing;
}

.assistant-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: transparent;
    border: none;
    border-radius: 50px;
    padding: 0;
    cursor: grab;
    transition: transform 0.3s;
    animation: assistantFloat 3s ease-in-out infinite;
}

.assistant-toggle:hover {
    transform: scale(1.1);
}

.assistant-toggle:active {
    cursor: grabbing;
    animation-play-state: paused;
}

.assistant-toggle-avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center center;
    flex-shrink: 0;
    filter: drop-shadow(0 6px 24px rgba(0, 212, 255, 0.4));
    transform-origin: center;
    transition: transform 0.45s var(--ease-out), filter 0.45s var(--ease-out), opacity 0.65s var(--ease-out);
}

.assistant-header-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center center;
    flex-shrink: 0;
    transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out), filter 0.65s var(--ease-out);
}

.assistant-toggle:hover .assistant-toggle-avatar,
.assistant-widget.speaking .assistant-toggle-avatar {
    transform: scale(2);
    filter: drop-shadow(0 12px 36px rgba(0, 212, 255, 0.5));
}

@keyframes assistantFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.assistant-label {
    display: inline-flex;
    align-items: flex-start;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 1px;
    text-transform: none;
    background: rgba(5, 6, 10, 0.7);
    padding: 4px 8px 3px;
    line-height: 1.1;
    overflow: visible;
    border-radius: var(--radius-sm);
    backdrop-filter: blur(8px);
    transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out), background 0.65s var(--ease-out), color 0.65s var(--ease-out);
}


.assistant-chat-title h3,
.assistant-chat-title span {
    transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out), color 0.65s var(--ease-out);
}

.assistant-widget.agent-switching .assistant-toggle-avatar,
.assistant-widget.agent-switching .assistant-header-avatar,
.assistant-widget.agent-switching .assistant-label,
.assistant-widget.agent-switching .assistant-chat-title h3,
.assistant-widget.agent-switching .assistant-chat-title span {
    opacity: 0;
    transform: scale(0.92);
}

.assistant-widget.agent-moon-shot .assistant-toggle-avatar,
.assistant-widget.agent-moon-shot .assistant-header-avatar {
    filter: drop-shadow(0 8px 24px rgba(153, 214, 255, 0.45)) hue-rotate(12deg) saturate(0.85);
}

.assistant-widget.agent-moon-shot .assistant-label {
    color: var(--accent);
    background: rgba(16, 24, 36, 0.78);
}

.assistant-widget.agent-moon-shot .assistant-chat-title h3 {
    color: var(--accent);
}

.assistant-widget.agent-moon-shot .assistant-chat-title span {
    color: var(--text-secondary);
}

/* Chat window */
.assistant-chat {
    position: absolute;
    bottom: 60px;
    right: 0;
    width: 380px;
    max-height: 500px;
    background: var(--bg-primary);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.assistant-chat.hidden {
    display: none;
}

.assistant-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.assistant-chat-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.assistant-chat-title h3 {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-bright);
}

.assistant-chat-title span {
    font-size: 0.7rem;
    color: var(--text-muted);
    display: block;
}

.assistant-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0 var(--space-sm);
    transition: color 0.2s;
}

.assistant-close:hover {
    color: var(--text-bright);
}

/* Messages */
.assistant-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    min-height: 280px;
    max-height: 360px;
}

.assistant-msg {
    max-width: 85%;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    line-height: 1.6;
}

.assistant-msg.bot {
    background: var(--bg-elevated);
    color: var(--text-secondary);
    align-self: flex-start;
    border-bottom-left-radius: var(--radius-sm);
}

.assistant-msg.user {
    background: var(--accent);
    color: var(--bg-deep);
    align-self: flex-end;
    border-bottom-right-radius: var(--radius-sm);
}

.assistant-msg p {
    margin: 0;
}

.assistant-citations {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(0, 212, 255, 0.12);
    display: grid;
    gap: 8px;
}

.assistant-citations-label {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    color: var(--accent-dim);
}

.assistant-citation {
    display: grid;
    gap: 4px;
}

.assistant-citation strong {
    font-size: 0.72rem;
    color: var(--text-bright);
    font-weight: 600;
}

.assistant-citation span {
    font-size: 0.7rem;
    color: var(--text-muted);
    line-height: 1.45;
}

.assistant-handoff {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(0, 212, 255, 0.12);
    display: grid;
    gap: 8px;
}

.assistant-handoff p {
    margin: 0;
}

.assistant-handoff a {
    color: var(--accent);
    font-size: 0.74rem;
    font-weight: 600;
    text-decoration: none;
}

.assistant-handoff a:hover,
.assistant-handoff a:focus-visible {
    text-decoration: underline;
}

/* Input */
.assistant-input-area {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.assistant-input-area input {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.2s;
}

.assistant-input-area input:focus {
    border-color: var(--accent-dim);
}

.assistant-input-area input::placeholder {
    color: var(--text-muted);
}

.assistant-input-area button {
    background: var(--accent);
    color: var(--bg-deep);
    border: none;
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    transition: background 0.2s;
}

.assistant-input-area button:hover {
    background: var(--text-bright);
}

@media (max-width: 480px) {
    .assistant-chat {
        width: calc(100vw - 32px);
        right: -8px;
    }
}

/* ---------- Project Name Highlights ---------- */
.highlight {
    color: var(--accent2);
    font-weight: 700;
}

/* ---------- Scroll Reveal ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Animations ---------- */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

/* ---------- Page Transition ---------- */
.page-transition {
    position: fixed;
    inset: 0;
    background: var(--bg-deep);
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.page-transition.active {
    opacity: 1;
    pointer-events: all;
}