/* ========================================
   CosmoClassifier - Professional Theme
   ======================================== */

:root {
    /* Core Colors - Dark Space Theme */
    --bg-primary: #030308;
    --bg-secondary: #0a0a12;
    --bg-tertiary: #12121c;
    --bg-card: rgba(18, 18, 28, 0.8);
    --bg-card-hover: rgba(22, 22, 35, 0.9);
    
    /* Accent Colors */
    --accent-primary: #7000ff;
    --accent-secondary: #00d4ff;
    --accent-tertiary: #ff6b6b;
    --accent-gradient: linear-gradient(135deg, #7000ff 0%, #00d4ff 100%);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #8b8b9e;
    --text-muted: #5a5a6e;
    
    /* Semantic Colors */
    --success: #00e676;
    --warning: #ffab40;
    --error: #ff5252;
    --info: #448aff;
    
    /* Class Colors */
    --galaxy: #7000ff;
    --star: #00d4ff;
    --qso: #ff6b6b;
    
    /* Borders & Effects */
    --border-color: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(112, 0, 255, 0.3);
    
    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   Reset & Base
   ======================================== */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-display);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   Animated Background
   ======================================== */

.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.stars {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(1px 1px at 20px 30px, white, transparent),
        radial-gradient(1px 1px at 40px 70px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1.5px 1.5px at 90px 40px, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 160px 120px, white, transparent),
        radial-gradient(1.5px 1.5px at 230px 80px, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 300px 200px, white, transparent),
        radial-gradient(1px 1px at 400px 150px, rgba(255,255,255,0.5), transparent),
        radial-gradient(1.5px 1.5px at 500px 280px, white, transparent),
        radial-gradient(1px 1px at 600px 100px, rgba(255,255,255,0.8), transparent);
    background-size: 650px 400px;
    animation: stars-drift 80s linear infinite;
}

@keyframes stars-drift {
    from { background-position: 0 0; }
    to { background-position: 650px 400px; }
}

.twinkling {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(2px 2px at 100px 50px, rgba(0, 212, 255, 0.3), transparent),
                radial-gradient(2px 2px at 250px 180px, rgba(112, 0, 255, 0.3), transparent),
                radial-gradient(3px 3px at 400px 90px, rgba(255, 255, 255, 0.2), transparent);
    background-size: 500px 300px;
    animation: twinkling 6s ease-in-out infinite;
}

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

.nebula {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
}

.nebula-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-primary);
    top: -200px;
    right: -200px;
    animation: nebula-float 20s ease-in-out infinite;
}

.nebula-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-secondary);
    bottom: -100px;
    left: -100px;
    animation: nebula-float 25s ease-in-out infinite reverse;
}

@keyframes nebula-float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* ========================================
   Header
   ======================================== */

.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(3, 3, 8, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

/* Navigation */
.main-nav {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.nav-btn svg {
    width: 18px;
    height: 18px;
}

.nav-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

.nav-btn.active {
    color: var(--accent-secondary);
    background: rgba(0, 212, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.2);
}

/* ========================================
   Main Content
   ======================================== */

.main-content {
    padding-top: 100px;
    min-height: calc(100vh - 80px);
}

.tab-content {
    display: none;
    animation: fade-in 0.4s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   Container
   ======================================== */

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-md);
}

.container-wide {
    max-width: 900px;
}

.container-split {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    position: relative;
    overflow: hidden;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(112, 0, 255, 0.5), transparent);
}

/* ========================================
   Section Header
   ======================================== */

.section-header {
    margin-bottom: var(--space-lg);
}

.section-header.centered {
    text-align: center;
}

.section-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* ========================================
   Three Panel Layout
   ======================================== */

.three-panel-layout {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: var(--space-lg);
}

.panel {
    display: flex;
    flex-direction: column;
}

/* .panel-left takes the form */

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

/* ========================================
   Input Styles
   ======================================== */

.predict-form {
    margin-bottom: var(--space-sm);
}

.input-stack {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
}

.input-stack .input-group:last-child {
    grid-column: span 2;
}

.input-group {
    position: relative;
    display: flex;
    flex-direction: column;
}

label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: var(--transition-normal);
}

input {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.8rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    transition: var(--transition-normal);
    position: relative;
}

input::placeholder {
    color: transparent;
}

input:focus {
    outline: none;
    border-color: var(--accent-secondary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.08);
    background: rgba(0, 0, 0, 0.5);
}

input:focus + label {
    color: var(--accent-secondary);
}

input:not(:placeholder-shown) + label {
    color: var(--text-secondary);
}

/* Input Focus Line Animation */
.input-focus-line {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: all var(--transition-normal);
    border-radius: 0 0 10px 10px;
}

input:focus ~ .input-focus-line {
    left: 0;
    width: 100%;
}

/* ========================================
   Buttons
   ======================================== */

.form-actions {
    margin-top: var(--space-md);
    display: flex;
    gap: 0.8rem;
}

.btn-primary, .btn-secondary {
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.btn-primary {
    flex: 2;
    border: none;
    color: #fff;
    background: var(--accent-gradient);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(112, 0, 255, 0.3);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-icon svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-normal);
}

.btn-primary:hover .btn-icon svg {
    transform: translateX(4px);
}

.btn-secondary:hover .btn-icon svg {
    transform: rotate(90deg);
}

/* ========================================
   Result Boxes
   ======================================== */

.result-box {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.result-prediction {
    flex: 1;
    min-height: 0;
}

.result-stats {
    flex: 2.2;
    min-height: 0;
}

.result-box-header {
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
}

.result-box-header h3 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-box-content {
    padding: 1rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    min-height: 0;
}

/* Awaiting Prediction State */
.awaiting-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    text-align: center;
    padding: 1.5rem;
}

.awaiting-icon {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    margin-bottom: 1rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.awaiting-icon svg {
    width: 100%;
    height: 100%;
}

.awaiting-state p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.awaiting-state span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Prediction Result */
.result-section {
    animation: slide-up 0.5s ease;
}

@keyframes slide-up {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.pred-main {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.pred-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.pred-class {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.probability-section {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 0.75rem;
}

.prob-title {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.prob-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.prob-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.prob-name {
    width: 60px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.prob-name.galaxy { color: var(--galaxy); }
.prob-name.star { color: var(--star); }
.prob-name.qso { color: var(--qso); }

.prob-bar-container {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
}

.prob-fill {
    height: 100%;
    width: 0%;
    border-radius: 4px;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.prob-fill.galaxy { background: linear-gradient(90deg, var(--galaxy), #9d4edd); }
.prob-fill.star { background: linear-gradient(90deg, var(--star), #00e5ff); }
.prob-fill.qso { background: linear-gradient(90deg, var(--qso), #ff8a80); }

.prob-value {
    width: 45px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-align: right;
    color: var(--text-primary);
    font-weight: 500;
}

.hidden {
    display: none !important;
}

/* Stats Box */
.stats-compact {
    display: flex;
    justify-content: space-around;
    margin-bottom: 0.75rem;
}

.stat-item {
    text-align: center;
}

.stat-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.confusion-mini {
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    flex: 1;
    min-height: 0;
    width: 100%;
}

.confusion-thumb {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
    background: #0a0a12; /* Match theme deep dark */
}

/* Confusion Matrix Section */
.confusion-section {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

.confusion-title {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    text-align: center;
    font-weight: 600;
}

.confusion-legend {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding: 0.75rem 0.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    flex-shrink: 0;
}

.legend-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.legend-text strong {
    font-size: 0.7rem;
    color: var(--text-primary);
}

.legend-text span {
    font-size: 0.6rem;
    color: var(--text-muted);
}

/* ========================================
   Model Info Tab
   ======================================== */

.model-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
}

.model-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: var(--space-lg);
    transition: all var(--transition-normal);
}

.model-card:hover {
    transform: translateY(-4px);
    border-color: rgba(112, 0, 255, 0.3);
}

.card-icon {
    width: 44px;
    height: 44px;
    background: var(--accent-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-sm);
}

.card-icon svg {
    width: 22px;
    height: 22px;
    color: white;
}

.model-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.model-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ========================================
   Footer
   ======================================== */

.main-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    margin-top: var(--space-xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-brand span:first-child {
    font-weight: 600;
    color: var(--text-primary);
}

.footer-divider {
    opacity: 0.3;
}

.footer-links {
    display: flex;
    gap: 1rem;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-link svg {
    width: 18px;
    height: 18px;
}

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

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ========================================
   Toast Notifications
   ======================================== */

.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    animation: toast-in 0.3s ease;
    max-width: 350px;
}

.toast.toast-out {
    animation: toast-out 0.3s ease forwards;
}

@keyframes toast-in {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toast-out {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(100%); }
}

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.toast.success .toast-icon { color: var(--success); }
.toast.error .toast-icon { color: var(--error); }
.toast.warning .toast-icon { color: var(--warning); }
.toast.info .toast-icon { color: var(--info); }

.toast-message {
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* ========================================
   Loading Spinner
   ======================================== */

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.footer-link-inline {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.footer-link-inline:hover {
    color: var(--accent-secondary);
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 900px) {
    .three-panel-layout {
        grid-template-columns: 1fr;
    }
    
    .panel-right {
        order: -1;
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-nav {
        width: 100%;
        justify-content: center;
    }
    
    .main-content {
        padding-top: 160px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .container {
        margin: 1rem;
        padding: var(--space-md);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .toast-container {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
    }
    
    .toast {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .nav-btn {
        font-size: 0.8rem;
        padding: 0.5rem 0.75rem;
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .stats-compact {
        flex-direction: column;
        gap: 0.75rem;
    }
}