/* ============================================
   FUTURIST E-INVOICING READINESS SCORE
   Design System & Styles
   ============================================ */

/* --- Design Tokens --- */
:root {
    /* Colors */
    --color-bg: #08090d;
    --color-bg-elevated: #0f1117;
    --color-bg-card: #141620;
    --color-bg-card-hover: #1a1d2e;
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-active: rgba(99, 102, 241, 0.4);

    --color-text-primary: #f0f0f5;
    --color-text-secondary: #8b8fa3;
    --color-text-muted: #5a5e72;

    --color-accent: #6366f1;
    --color-accent-light: #818cf8;
    --color-accent-dark: #4f46e5;
    --color-accent-glow: rgba(99, 102, 241, 0.15);

    --color-success: #22c55e;
    --color-success-bg: rgba(34, 197, 94, 0.1);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.1);
    --color-danger: #ef4444;
    --color-danger-bg: rgba(239, 68, 68, 0.1);
    --color-critical: #dc2626;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --gradient-score-high: linear-gradient(135deg, #22c55e, #10b981);
    --gradient-score-mid: linear-gradient(135deg, #f59e0b, #eab308);
    --gradient-score-low: linear-gradient(135deg, #ef4444, #dc2626);
    --gradient-text: linear-gradient(135deg, #c7d2fe 0%, #a5b4fc 30%, #818cf8 60%, #6366f1 100%);

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

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

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

a {
    color: var(--color-accent-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* --- Animated Background --- */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    pointer-events: none;
}

.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    z-index: 0;
    pointer-events: none;
    animation: glowFloat 15s ease-in-out infinite;
}

.bg-glow--1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15), transparent 70%);
    top: -200px;
    right: -100px;
}

.bg-glow--2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1), transparent 70%);
    bottom: -150px;
    left: -100px;
    animation-delay: -7s;
}

@keyframes glowFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 15px) scale(0.95); }
}

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    background: rgba(8, 9, 13, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
}

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

.header__logo-icon {
    font-size: 1.2rem;
    color: var(--color-accent);
}

.header__logo-text {
    font-weight: 800;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    color: var(--color-text-primary);
}

.header__deadline {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.header__deadline-label {
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-danger);
}

.header__deadline-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

/* --- Main --- */
.main {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(60px + var(--space-xl)) var(--space-lg) var(--space-3xl);
}

/* --- Screen Transitions --- */
.screen {
    display: none;
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    animation: fadeSlideIn 0.5s ease-out;
}

.screen.active {
    display: block;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Intro Screen --- */
.intro {
    text-align: center;
}

.intro__badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--color-accent-light);
    background: var(--color-accent-glow);
    border: 1px solid rgba(99, 102, 241, 0.2);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-xl);
}

.intro__title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.intro__title--gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.intro__subtitle {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto var(--space-md);
}

.intro__subtitle strong {
    color: var(--color-danger);
    font-weight: 600;
}

.intro__detail {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    max-width: 520px;
    margin: 0 auto var(--space-2xl);
}

.intro__trust {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.intro__trust-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.intro__trust-number {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.intro__trust-label {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.intro__trust-divider {
    width: 1px;
    height: 36px;
    background: var(--color-border);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 12px 24px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.btn--primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.2);
}

.btn--primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.3);
}

.btn--primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn--ghost:hover:not(:disabled) {
    border-color: var(--color-border-active);
    color: var(--color-text-primary);
    background: rgba(99, 102, 241, 0.05);
}

.btn--large {
    padding: 16px 32px;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

/* --- Quiz Screen --- */
.quiz {
    width: 100%;
}

.quiz__progress {
    width: 100%;
    height: 4px;
    background: var(--color-bg-card);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-sm);
}

.quiz__progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.quiz__progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
    font-family: var(--font-mono);
}

.quiz__question-container {
    min-height: 380px;
    animation: fadeSlideIn 0.35s ease-out;
}

.quiz__category {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    margin-bottom: var(--space-sm);
}

.quiz__question {
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.01em;
}

.quiz__help {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    line-height: 1.5;
    font-style: italic;
}

.quiz__options {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.quiz__option {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    user-select: none;
}

.quiz__option:hover {
    background: var(--color-bg-card-hover);
    border-color: rgba(99, 102, 241, 0.2);
}

.quiz__option.selected {
    background: rgba(99, 102, 241, 0.08);
    border-color: var(--color-accent);
    box-shadow: 0 0 0 1px var(--color-accent), var(--shadow-glow);
}

.quiz__option-radio {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.quiz__option.selected .quiz__option-radio {
    border-color: var(--color-accent);
    background: var(--color-accent);
}

.quiz__option.selected .quiz__option-radio::after {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: white;
}

.quiz__option-text {
    font-size: 0.92rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.quiz__option.selected .quiz__option-text {
    color: var(--color-text-primary);
}

.quiz__option-key {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: rgba(255,255,255,0.04);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    margin-left: auto;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.quiz__option.selected .quiz__option-key {
    background: rgba(99, 102, 241, 0.2);
    color: var(--color-accent-light);
}

/* --- Quiz Navigation --- */
.quiz__nav {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-2xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

/* --- Results Screen --- */
.results {
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}

.results__score-container {
    margin-bottom: var(--space-2xl);
}

.results__score-ring {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--space-lg);
}

.results__score-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.results__score-track {
    fill: none;
    stroke: var(--color-bg-card);
    stroke-width: 8;
}

.results__score-fill {
    fill: none;
    stroke: var(--color-accent);
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1),
                stroke 0.5s ease;
}

.results__score-value {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.results__score-number {
    font-family: var(--font-mono);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
}

.results__score-max {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.results__score-label {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* Score colors */
.score-high .results__score-number { color: var(--color-success); }
.score-high .results__score-label { color: var(--color-success); }
.score-high .results__score-fill { stroke: var(--color-success); }

.score-mid .results__score-number { color: var(--color-warning); }
.score-mid .results__score-label { color: var(--color-warning); }
.score-mid .results__score-fill { stroke: var(--color-warning); }

.score-low .results__score-number { color: var(--color-danger); }
.score-low .results__score-label { color: var(--color-danger); }
.score-low .results__score-fill { stroke: var(--color-danger); }

.score-critical .results__score-number { color: var(--color-critical); }
.score-critical .results__score-label { color: var(--color-critical); }
.score-critical .results__score-fill { stroke: var(--color-critical); }

/* --- Results Breakdown --- */
.results__breakdown {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    text-align: left;
}

.results__dimension {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
}

.results__dimension-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.results__dimension-name {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.results__dimension-score {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
}

.results__dimension-bar {
    width: 100%;
    height: 4px;
    background: rgba(255,255,255,0.06);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.results__dimension-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 1s ease-out;
}

/* --- Results Risk --- */
.results__risk {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-2xl);
    text-align: left;
}

.results__risk-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.results__risk-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.results__risk-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

.results__risk-item--critical {
    color: var(--color-danger);
}

.results__risk-item--warning {
    color: var(--color-warning);
}

.results__risk-item--ok {
    color: var(--color-success);
}

.results__risk-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

/* --- Results CTA --- */
.results__cta {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(139, 92, 246, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
}

.results__cta-title {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: var(--space-md);
}

.results__cta-text {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.results__cta-text strong {
    color: var(--color-text-primary);
}

.results__cta-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* --- Footer --- */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--space-xl);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
}

/* --- Responsive --- */
@media (max-width: 640px) {
    .main {
        padding: calc(60px + var(--space-md)) var(--space-md) var(--space-2xl);
    }

    .intro__trust {
        flex-direction: column;
        gap: var(--space-md);
    }

    .intro__trust-divider {
        width: 40px;
        height: 1px;
    }

    .results__breakdown {
        grid-template-columns: 1fr;
    }

    .results__cta-buttons {
        flex-direction: column;
    }

    .quiz__question {
        font-size: 1.15rem;
    }

    .header {
        padding: var(--space-sm) var(--space-md);
    }
}