/* style.css - Aurora Edition for Tic-Tac-Toe AI */

:root {
    --font-family-main: 'Inter', sans-serif;
    --bg-color: #0d1117; /* Very dark blue, almost black */
    --text-color-primary: #c9d1d9; /* Light gray for primary text */
    --text-color-secondary: #8b949e; /* Medium gray for secondary text */
    --card-bg: rgba(22, 27, 34, 0.8); /* Slightly more opaque card */
    --card-border: rgba(48, 54, 61, 0.9);
    --navbar-bg: rgba(13, 17, 23, 0.85); /* Navbar background */
    --navbar-border: rgba(48, 54, 61, 0.7);
    --accent-blue: #58a6ff;
    --accent-pink: #f778ba;
    --accent-green: #3fb950;
    --accent-yellow: #e3b341;
    --accent-red: #f85149;
    --input-bg: rgba(13, 17, 23, 0.7);
    --input-border: #30363d;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --border-radius-card: 16px;
    --border-radius-element: 8px;
}

/* --- Base Styles & Typography --- */
body {
    font-family: var(--font-family-main);
    background-color: var(--bg-color);
    color: var(--text-color-primary);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden; 
    position: relative; 
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-top: 70px; /* Space for fixed navbar */
}

.content-wrapper {
    flex-grow: 1;
    width: 100%;
    padding: 2rem 1rem; 
    z-index: 1; 
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* --- Aurora Background --- */
.aurora-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1; /* Behind everything */
    pointer-events: none;
}
.aurora-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.12; /* Even softer */
    filter: blur(120px); /* Even more blur */
    animation: float 20s infinite ease-in-out alternate;
}
.aurora-shape.shape-1 { width: 600px; height: 600px; background: radial-gradient(circle, var(--accent-blue) 0%, transparent 70%); top: -15%; left: -20%; animation-duration: 22s; }
.aurora-shape.shape-2 { width: 550px; height: 550px; background: radial-gradient(circle, var(--accent-pink) 0%, transparent 70%); top: 5%; right: -25%; animation-duration: 25s; animation-delay: -5s; }
.aurora-shape.shape-3 { width: 500px; height: 500px; background: radial-gradient(circle, var(--accent-green) 0%, transparent 70%); bottom: -20%; left: 15%; animation-duration: 18s; animation-delay: -10s; }
.aurora-shape.shape-4 { width: 450px; height: 450px; background: radial-gradient(circle, var(--accent-yellow) 0%, transparent 70%); bottom: 0%; right: 5%; animation-duration: 28s; animation-delay: -2s; }

@keyframes float {
    0% { transform: translateY(0px) translateX(0px) scale(1); }
    50% { transform: translateY(-40px) translateX(30px) scale(1.1); }
    100% { transform: translateY(0px) translateX(0px) scale(1); }
}

/* --- Navigation Bar --- */
.app-navbar {
    background-color: var(--navbar-bg);
    border-bottom: 1px solid var(--navbar-border);
    padding: 0.75rem 1.5rem;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000; /* Ensure navbar is on top */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}
.nav-brand:hover { color: var(--accent-blue); }
.ai-accent-nav {
    background: linear-gradient(120deg, var(--accent-blue), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
}
.nav-links li { margin-left: 1.5rem; }
.nav-link {
    color: var(--text-color-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    padding: 0.5rem 0.25rem;
    position: relative;
    transition: color 0.2s ease;
}
.nav-link i { margin-right: 0.35rem; }
.nav-link:hover, .nav-link.active {
    color: var(--text-color-primary);
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(120deg, var(--accent-blue), var(--accent-pink));
    transition: width 0.3s ease;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-toggle {
    display: none; /* Hidden on larger screens */
    background: none;
    border: none;
    color: var(--text-color-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- Header (Page Title) --- */
.app-header { text-align: center; margin-bottom: 2.5rem; animation: fadeInDown 0.8s ease-out; }
.main-title { font-size: clamp(2.5rem, 6vw, 3.8rem); font-weight: 800; letter-spacing: -0.025em; margin-bottom: 0.5rem; color: var(--text-color-primary); }
.main-title .ai-accent { background: linear-gradient(120deg, var(--accent-blue), var(--accent-pink)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; padding: 0 0.2em; }
.subtitle { font-size: clamp(1rem, 2.5vw, 1.2rem); color: var(--text-color-secondary); max-width: 600px; margin: 0 auto; line-height: 1.6; }

/* --- Main Layout (Game Page) --- */
.main-layout { width: 100%; max-width: 1280px; display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 1024px) { .main-layout { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); } }

/* --- Cards --- */
.card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--border-radius-card); padding: 1.75rem; box-shadow: 0 8px 32px 0 var(--shadow-color); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); animation: fadeInUp 0.6s ease-out forwards; opacity: 0; }
.sidebar-card { margin-bottom: 1.5rem; }
.sidebar-card:last-child { margin-bottom: 0; }
.card-title { font-size: 1.375rem; font-weight: 600; color: var(--text-color-primary); margin-bottom: 1.5rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--card-border); display: flex; align-items: center; }
.card-title i { margin-right: 0.75rem; color: var(--accent-blue); font-size: 1.25rem; }

/* --- Game Area Specifics --- */
.game-area { display: flex; flex-direction: column; align-items: center; animation-delay: 0.1s; }
.status-message { font-size: 1.5rem; font-weight: 500; margin-bottom: 1.5rem; min-height: 2.25rem; color: var(--text-color-primary); transition: color 0.3s ease; }
.game-board { display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr); gap: 0.5rem; width: clamp(280px, 80vw, 380px); height: clamp(280px, 80vw, 380px); background-color: rgba(0,0,0,0.1); padding: 0.5rem; border-radius: var(--border-radius-element); margin-bottom: 1.5rem; box-shadow: inset 0 0 10px rgba(0,0,0,0.2); }
.cell { background-color: rgba(255,255,255,0.05); border: 1px solid var(--card-border); border-radius: 6px; display: flex; justify-content: center; align-items: center; font-size: clamp(2.5rem, 15vw, 4.5rem); font-weight: 700; cursor: pointer; transition: background-color 0.2s ease, transform 0.15s ease; color: var(--text-color-primary); position: relative; line-height: 1; overflow: hidden; }
.cell:hover:not(.X):not(.O) { background-color: rgba(255,255,255,0.1); transform: scale(1.03); }
.cell.X { color: var(--accent-blue); text-shadow: 0 0 12px var(--accent-blue); }
.cell.O { color: var(--accent-pink); text-shadow: 0 0 12px var(--accent-pink); }
.winning-cell { background-color: var(--accent-green) !important; color: #fff !important; text-shadow: 0 0 8px rgba(255,255,255,0.5); animation: pulseWinAurora 0.7s infinite alternate; }
@keyframes pulseWinAurora { from { box-shadow: 0 0 10px var(--accent-green), inset 0 0 5px rgba(255,255,255,0.3); } to { box-shadow: 0 0 20px var(--accent-green), inset 0 0 10px rgba(255,255,255,0.5); transform: scale(1.05); } }
.cell-placed { animation: popInAurora 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
@keyframes popInAurora { 0% { transform: scale(0.3); opacity: 0; } 70% { transform: scale(1.1); opacity: 1; } 100% { transform: scale(1); opacity: 1; } }

/* --- Controls Sidebar Specifics --- */
.controls-sidebar { display: flex; flex-direction: column; gap: 1.5rem; animation-delay: 0.2s; }
.q-learning-panel { display: contents; }
.ai-selector-container { margin-bottom: 1.5rem; width: 100%; max-width: 350px; }
.ai-selector-label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--text-color-secondary); margin-bottom: 0.5rem; }
.ai-selector-label i { margin-right: 0.5rem; color: var(--accent-blue); }
.custom-select-wrapper { position: relative; }
.ai-selector-dropdown { appearance: none; -webkit-appearance: none; -moz-appearance: none; width: 100%; padding: 0.75rem 2.5rem 0.75rem 1rem; background-color: var(--input-bg); border: 1px solid var(--input-border); border-radius: var(--border-radius-element); color: var(--text-color-primary); font-size: 0.9375rem; cursor: pointer; transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.ai-selector-dropdown:hover { border-color: var(--accent-blue); }
.ai-selector-dropdown:focus { outline: none; border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.3); }
.select-arrow { position: absolute; top: 50%; right: 1rem; transform: translateY(-50%); color: var(--text-color-secondary); pointer-events: none; font-size: 0.875rem; }

/* Sliders, Checkbox, Buttons - Styles from previous step are generally fine */
.slider-container { margin-bottom: 1.25rem; }
.slider-label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--text-color-secondary); margin-bottom: 0.5rem; }
.slider-label span { color: var(--text-color-primary); font-weight: 600; }
.slider { -webkit-appearance: none; appearance: none; width: 100%; height: 8px; background: var(--input-bg); border: 1px solid var(--input-border); border-radius: 4px; outline: none; transition: background 0.2s ease; }
.slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 20px; height: 20px; background: var(--accent-blue); border-radius: 50%; cursor: pointer; border: 3px solid var(--bg-color); box-shadow: 0 0 5px rgba(88, 166, 255, 0.5); transition: transform 0.2s ease, box-shadow 0.2s ease; }
.slider::-webkit-slider-thumb:hover { transform: scale(1.1); box-shadow: 0 0 10px rgba(88, 166, 255, 0.7); }
.slider::-moz-range-thumb { width: 20px; height: 20px; background: var(--accent-blue); border-radius: 50%; cursor: pointer; border: 3px solid var(--bg-color); box-shadow: 0 0 5px rgba(88, 166, 255, 0.5); }
.slider:disabled::-webkit-slider-thumb { background: var(--text-color-secondary); box-shadow: none; }
.slider:disabled::-moz-range-thumb { background: var(--text-color-secondary); box-shadow: none; }

.checkbox-container { display: flex; align-items: center; margin-bottom: 1.25rem; cursor: pointer; }
.form-checkbox { appearance: none; -webkit-appearance: none; -moz-appearance: none; width: 20px; height: 20px; background-color: var(--input-bg); border: 1px solid var(--input-border); border-radius: 4px; cursor: pointer; margin-right: 0.75rem; position: relative; transition: background-color 0.2s ease, border-color 0.2s ease; }
.form-checkbox:checked { background-color: var(--accent-blue); border-color: var(--accent-blue); }
.form-checkbox:checked::before { content: '\f00c'; font-family: 'Font Awesome 6 Free'; font-weight: 900; color: var(--bg-color); font-size: 0.75rem; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.form-checkbox-label { font-size: 0.9375rem; color: var(--text-color-secondary); user-select: none; }
.form-checkbox-label:hover { color: var(--text-color-primary); }

.btn { padding: 0.75rem 1.25rem; border-radius: var(--border-radius-element); font-weight: 600; font-size: 0.9375rem; cursor: pointer; transition: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275); border: 1px solid transparent; display: inline-flex; align-items: center; justify-content: center; text-decoration: none; position: relative; overflow: hidden; }
.btn:hover:not(:disabled) { transform: translateY(-2px) scale(1.02); box-shadow: 0 6px 12px rgba(0,0,0,0.2); }
.btn:active:not(:disabled) { transform: translateY(0px) scale(0.98); box-shadow: 0 2px 4px rgba(0,0,0,0.15); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-icon i { margin-right: 0.5rem; }
.btn-full-width { width: 100%; margin-top: 0.75rem; }
.btn-primary { background-color: var(--accent-blue); color: #fff; border-color: var(--accent-blue); }
.btn-primary:hover:not(:disabled) { background-color: #79c0ff; }
.btn-secondary { background-color: var(--input-bg); color: var(--text-color-primary); border-color: var(--input-border); }
.btn-secondary:hover:not(:disabled) { border-color: var(--accent-blue); color: var(--accent-blue); }
.btn-success { background-color: var(--accent-green); color: #fff; border-color: var(--accent-green); }
.btn-success:hover:not(:disabled) { background-color: #56d364; }
.btn-danger-secondary { background-color: transparent; color: var(--accent-red); border: 1px solid var(--accent-red); }
.btn-danger-secondary:hover:not(:disabled) { background-color: rgba(248, 81, 73, 0.1); color: #ff7b72; }
.btn-info { background-color: var(--accent-yellow); color: var(--bg-color); border-color: var(--accent-yellow); }
.btn-info:hover:not(:disabled) { background-color: #f0c150; }
.button-group { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-bottom: 0.75rem; }
.file-buttons { margin-top: 1rem; }

/* Stats Card */
.stats-card { animation-delay: 0.3s; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.stat-item { background-color: rgba(255,255,255,0.03); padding: 0.75rem; border-radius: 6px; text-align: center; border: 1px solid var(--input-border); }
.stat-label { display: block; font-size: 0.8rem; color: var(--text-color-secondary); margin-bottom: 0.25rem; text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { display: block; font-size: 1.5rem; font-weight: 700; color: var(--text-color-primary); }
.stat-value.x-wins { color: var(--accent-blue); }
.stat-value.o-wins { color: var(--accent-pink); }
.stat-value.draws { color: var(--text-color-secondary); }
.stat-value.total-games { color: var(--text-color-primary); }
.q-table-stat { margin-top: 1rem; background-color: transparent; border: none; padding-left: 0; padding-right: 0; text-align: left;}
.q-table-stat .stat-label { text-align: left; }
.q-table-stat .stat-value { font-size: 1.125rem; text-align: left; }
.optimized-msg { font-size: 0.875rem; color: var(--accent-green); margin-top: 1rem; text-align: center; font-weight: 500; }
.optimized-msg i { margin-right: 0.35rem; }

/* --- Static Page Specific Styles --- */
.static-page-wrapper .app-header { margin-bottom: 2rem; } /* Less margin for static page headers */
.static-content {
    width: 100%;
    max-width: 900px; /* Content width for static pages */
    margin: 0 auto; /* Center the content card */
    animation-delay: 0.1s; /* Faster animation for content card */
}
.static-content .content-section { margin-bottom: 2rem; }
.static-content .content-section:last-child { margin-bottom: 0; }
.static-content h2.section-title, .static-content h3.section-subtitle {
    color: var(--text-color-primary);
    font-weight: 700;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
}
.static-content h2.section-title i, .static-content h3.section-subtitle i {
    margin-right: 0.75rem;
    color: var(--accent-blue); /* Or choose another accent */
}
.static-content h2.section-title { font-size: 1.75rem; } /* text-2xl */
.static-content h3.section-subtitle { font-size: 1.25rem; } /* text-xl */
.static-content p, .static-content li {
    color: var(--text-color-secondary);
    line-height: 1.7;
    margin-bottom: 0.75rem;
    font-size: 1rem;
}
.static-content ul { list-style: disc; padding-left: 1.5rem; }
.static-content ul ul { list-style: circle; margin-top: 0.5rem; }
.static-content code {
    background-color: rgba(0,0,0,0.2);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
    color: var(--accent-yellow);
}
.static-content strong { color: var(--text-color-primary); font-weight: 600; }
.static-content a { color: var(--accent-blue); text-decoration: none; transition: color 0.2s ease; }
.static-content a:hover { color: #79c0ff; text-decoration: underline; }

/* About Developer Page Specifics */
.about-developer-card .developer-profile { text-align: center; margin-bottom: 2rem; }
.about-developer-card .profile-pic { width: 120px; height: 120px; border-radius: 50%; margin: 0 auto 1rem auto; border: 3px solid var(--accent-blue); object-fit: cover; }
.about-developer-card .developer-name { font-size: 1.75rem; font-weight: 700; color: var(--text-color-primary); margin-bottom: 0.25rem; }
.about-developer-card .developer-tagline { font-size: 1rem; color: var(--text-color-secondary); font-style: italic; }
.skills-list li { margin-bottom: 0.5rem; }
.social-links { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 1rem; }
.social-links .btn { background-color: var(--input-bg); color: var(--text-color-primary); border-color: var(--input-border); }
.social-links .btn:hover { border-color: var(--accent-blue); color: var(--accent-blue); }


/* Footer */
.app-footer { width: 100%; text-align: center; padding: 2rem 1rem; color: var(--text-color-secondary); font-size: 0.875rem; z-index: 1; position: relative; margin-top: auto; }

/* Visually Hidden */
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }

/* Animation Keyframes */
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* Responsive adjustments for Navbar and Static Pages */
@media (max-width: 768px) { /* md breakpoint */
    .app-navbar { padding: 0.75rem 1rem; }
    .nav-links {
        display: none; /* Hide on mobile by default */
        flex-direction: column;
        position: absolute;
        top: 100%; /* Position below the navbar */
        left: 0;
        width: 100%;
        background-color: var(--navbar-bg); /* Same as navbar */
        border-top: 1px solid var(--navbar-border);
        padding: 1rem 0;
    }
    .nav-links.show { display: flex; } /* Show when toggled */
    .nav-links li { margin-left: 0; width: 100%; text-align: center; }
    .nav-link { display: block; padding: 0.75rem 1rem; width: 100%; }
    .nav-link::after { display: none; } /* No underline for mobile dropdown items */
    .nav-toggle { display: block; } /* Show toggle button */

    .app-header { margin-bottom: 2rem; }
    .card { padding: 1.25rem; }
    .card-title { font-size: 1.125rem; }
    .status-message { font-size: 1.25rem; }
    .button-group { grid-template-columns: 1fr; }
    .btn { font-size: 0.875rem; padding: 0.6rem 1rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .static-content { padding: 1.25rem; }
    .static-content h2.section-title { font-size: 1.5rem; }
    .static-content h3.section-subtitle { font-size: 1.125rem; }
}

@media (max-width: 480px) { /* xs breakpoint */
    body { padding-top: 60px; } /* Adjust for slightly smaller navbar if needed */
    .app-navbar { padding: 0.5rem 1rem; }
    .nav-brand { font-size: 1.25rem; }
    .content-wrapper { padding: 1rem 0.5rem; }
    .main-title { font-size: 2rem; }
    .subtitle { font-size: 0.9rem; }
    .game-board { gap: 0.35rem; padding: 0.35rem; }
    .cell { font-size: clamp(2rem, 12vw, 3.5rem); }
    .aurora-shape { filter: blur(70px); }
    .aurora-shape.shape-1 { width: 300px; height: 300px; }
    .aurora-shape.shape-2 { width: 250px; height: 250px; }
    .aurora-shape.shape-3 { width: 200px; height: 200px; }
    .aurora-shape.shape-4 { width: 180px; height: 180px; }
}