/* ==========================================================================
   Copilot Academy - AI Kennistest
   Duolingo-inspired, mobile-first design
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-primary: #F7C52D;
    --color-primary-dark: #E5B526;
    --color-primary-light: #FFF3CD;
    --color-accent: #E85A4F;
    --color-success: #58CC02;
    --color-success-dark: #4CAD02;
    --color-black: #1A1A1A;
    --color-gray-900: #3C3C3C;
    --color-gray-700: #6B6B6B;
    --color-gray-500: #AFAFAF;
    --color-gray-300: #E5E5E5;
    --color-gray-100: #F7F7F7;
    --color-cream: #F5F0E1;
    --color-white: #FFFFFF;

    /* Typography */
    --font-primary: 'Fira Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-condensed: 'Fira Sans Condensed', 'Fira Sans', sans-serif;

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

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-button: 0 4px 0 var(--color-primary-dark);
    --shadow-button-success: 0 4px 0 var(--color-success-dark);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* --------------------------------------------------------------------------
   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;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-black);
    background-color: var(--color-gray-100);
    min-height: 100vh;
    min-height: 100dvh;
}

/* --------------------------------------------------------------------------
   App Container
   -------------------------------------------------------------------------- */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--color-white);
    box-shadow: var(--shadow-lg);
}

@media (min-width: 601px) {
    body {
        padding: var(--space-lg);
    }
    .app {
        border-radius: var(--radius-xl);
        min-height: calc(100vh - var(--space-xl) * 2);
        margin-top: var(--space-lg);
    }
}

@media (min-width: 1024px) {
    .app {
        max-width: 900px;
    }
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-300);
}

.logo {
    height: 28px;
    width: auto;
}

/* --------------------------------------------------------------------------
   Progress Bar
   -------------------------------------------------------------------------- */
.progress-container {
    display: none;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-white);
}

.progress-container.visible {
    display: flex;
}

.progress-bar {
    flex: 1;
    height: 12px;
    background-color: var(--color-gray-300);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.progress-text {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-700);
    min-width: 36px;
    text-align: right;
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   Screen
   -------------------------------------------------------------------------- */
.screen {
    display: none;
    flex-direction: column;
    flex: 1;
    animation: fadeIn var(--transition-normal);
}

.screen--active {
    display: flex;
}

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

.screen__content {
    flex: 1;
    padding: var(--space-lg);
    overflow-y: auto;
}

.screen__content--centered {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.screen__footer {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-300);
}

.screen__footer--column {
    flex-direction: column;
}

/* --------------------------------------------------------------------------
   Welcome Screen
   -------------------------------------------------------------------------- */
.welcome-icon {
    margin-bottom: var(--space-lg);
}

.welcome-title {
    font-family: var(--font-condensed);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--space-sm);
}

.welcome-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-700);
    margin-bottom: var(--space-xl);
}

.welcome-info {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-gray-700);
}

.info-icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.welcome-description {
    font-size: 1rem;
    color: var(--color-gray-700);
    max-width: 500px;
    line-height: 1.6;
}

.welcome-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-lg);
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    color: var(--color-gray-700);
}

.benefit-check {
    color: var(--color-success);
    font-weight: 700;
}

.welcome-social-proof {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    font-style: italic;
}

/* --------------------------------------------------------------------------
   Skills Interstitial Screen
   -------------------------------------------------------------------------- */
.skills-eyebrow {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-700);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.skills-headline {
    font-family: var(--font-condensed);
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-2xl);
    line-height: 1.3;
    color: var(--color-black);
}

.skills-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    width: 100%;
    max-width: 480px;
    padding: var(--space-xl);
    border: 3px solid var(--color-primary);
    border-radius: var(--radius-xl);
    background-color: var(--color-white);
}

.skill-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
}

.skill-text {
    flex: 1;
    text-align: left;
}

.skill-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    background-color: var(--color-primary);
    border-radius: 50%;
    color: var(--color-black);
}

.skill-icon-wrapper svg {
    width: 28px;
    height: 28px;
}

.skill-title {
    font-family: var(--font-condensed);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    color: var(--color-black);
}

.skill-description {
    color: var(--color-gray-700);
    font-size: 0.9375rem;
    line-height: 1.5;
    margin: 0;
}

@media (min-width: 601px) {
    .skills-headline {
        font-size: 2rem;
    }

    .skills-grid {
        max-width: 540px;
        padding: var(--space-2xl);
    }

    .skill-icon-wrapper {
        width: 64px;
        height: 64px;
    }

    .skill-icon-wrapper svg {
        width: 32px;
        height: 32px;
    }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    padding: var(--space-md) var(--space-lg);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

.btn--primary {
    flex: 1;
    background-color: var(--color-primary);
    color: var(--color-black);
    box-shadow: var(--shadow-button);
    transform: translateY(-2px);
}

.btn--primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
}

.btn--primary:active:not(:disabled) {
    transform: translateY(2px);
    box-shadow: none;
}

.btn--success {
    flex: 1;
    background-color: var(--color-success);
    color: var(--color-white);
    box-shadow: var(--shadow-button-success);
    transform: translateY(-2px);
}

.btn--success:hover:not(:disabled) {
    background-color: var(--color-success-dark);
}

.btn--success:active:not(:disabled) {
    transform: translateY(2px);
    box-shadow: none;
}

.btn--secondary {
    background-color: var(--color-white);
    color: var(--color-gray-700);
    border: 2px solid var(--color-gray-300);
}

.btn--secondary:hover:not(:disabled) {
    background-color: var(--color-gray-100);
    border-color: var(--color-gray-500);
}

.btn--link {
    background: none;
    color: var(--color-gray-700);
    padding: var(--space-sm);
}

.btn--link:hover {
    color: var(--color-black);
}

.btn--large {
    padding: var(--space-lg) var(--space-xl);
    font-size: 1.125rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.btn-icon--left {
    margin-right: var(--space-xs);
}

/* --------------------------------------------------------------------------
   Question Screen
   -------------------------------------------------------------------------- */
.question-category {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary-dark);
    background-color: var(--color-primary-light);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.category-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    color: var(--color-primary-dark);
}

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

.question-text {
    font-family: var(--font-condensed);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--space-xl);
    line-height: 1.3;
}

/* --------------------------------------------------------------------------
   Answer Options
   -------------------------------------------------------------------------- */
.answers {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.answer {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-white);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.answer:hover {
    border-color: var(--color-gray-500);
    background-color: var(--color-gray-100);
}

.answer--selected {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.answer--selected:hover {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.answer__letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--color-gray-700);
    background-color: var(--color-gray-100);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.answer--selected .answer__letter {
    color: var(--color-black);
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.answer__text {
    font-size: 1rem;
    color: var(--color-black);
    line-height: 1.5;
    padding-top: 4px;
}

.answer:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Enter Hint
   -------------------------------------------------------------------------- */
.enter-hint {
    opacity: 0;
    font-size: 0.875rem;
    color: var(--color-gray-500);
    transition: opacity var(--transition-fast);
    display: flex;
    align-items: center;
}

.enter-hint.visible {
    opacity: 1;
}

/* --------------------------------------------------------------------------
   Prompt Exercise Screen
   -------------------------------------------------------------------------- */
.prompt-scenario {
    background-color: var(--color-cream);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
}

.scenario-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-700);
    margin-bottom: var(--space-sm);
}

.scenario-text {
    font-size: 1rem;
    color: var(--color-black);
    line-height: 1.6;
}

.prompt-hint {
    font-size: 0.875rem;
    color: var(--color-gray-700);
    background-color: var(--color-primary-light);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    border-left: 4px solid var(--color-primary);
}

.prompt-task {
    font-size: 1rem;
    color: var(--color-black);
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

.prompt-input-container {
    position: relative;
}

.prompt-input {
    width: 100%;
    font-family: var(--font-primary);
    font-size: 1rem;
    padding: var(--space-lg);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    resize: vertical;
    min-height: 150px;
    transition: border-color var(--transition-fast);
}

.prompt-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.prompt-input::placeholder {
    color: var(--color-gray-500);
}

.char-count {
    position: absolute;
    bottom: var(--space-sm);
    right: var(--space-md);
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

/* --------------------------------------------------------------------------
   Loading Screen
   -------------------------------------------------------------------------- */
.loading-spinner {
    width: 64px;
    height: 64px;
    border: 6px solid var(--color-gray-300);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--space-xl);
}

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

.loading-title {
    font-family: var(--font-condensed);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--space-sm);
}

.loading-text {
    font-size: 1rem;
    color: var(--color-gray-700);
}

/* --------------------------------------------------------------------------
   Results Screen
   -------------------------------------------------------------------------- */
.results-score {
    position: relative;
    width: 160px;
    height: 160px;
    margin-bottom: var(--space-xl);
}

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

.score-ring__bg {
    fill: none;
    stroke: var(--color-gray-300);
    stroke-width: 12;
}

.score-ring__fill {
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 12;
    stroke-linecap: round;
    stroke-dasharray: 339.292;
    stroke-dashoffset: 339.292;
    transition: stroke-dashoffset 1s ease-out;
}

.score-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -60%);
    font-family: var(--font-condensed);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-black);
}

.score-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, 60%);
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

/* --------------------------------------------------------------------------
   Results Recommendation
   -------------------------------------------------------------------------- */
.results-recommendation {
    width: 100%;
    text-align: center;
    margin-bottom: var(--space-xl);
}

.recommendation-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.recommendation-badge--session1 {
    color: var(--color-accent);
    background-color: #FDEEEE;
}

.recommendation-badge--session2 {
    color: #D97706;
    background-color: #FEF3C7;
}

.recommendation-badge--workflow {
    color: #059669;
    background-color: #D1FAE5;
}

.recommendation-badge--advanced {
    color: #7C3AED;
    background-color: #EDE9FE;
}

.recommendation-title {
    font-family: var(--font-condensed);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: var(--space-sm);
}

.recommendation-text {
    font-size: 1rem;
    color: var(--color-gray-700);
    max-width: 600px;
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Results Breakdown
   -------------------------------------------------------------------------- */
.results-breakdown {
    width: 100%;
    background-color: var(--color-gray-100);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
}

.breakdown-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-md);
}

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

.breakdown-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.breakdown-item__label {
    font-size: 0.875rem;
    color: var(--color-black);
}

.breakdown-item__score {
    font-weight: 600;
    color: var(--color-black);
}

.breakdown-item__bar {
    flex: 1;
    height: 8px;
    background-color: var(--color-gray-300);
    border-radius: var(--radius-full);
    margin: 0 var(--space-md);
    overflow: hidden;
}

.breakdown-item__fill {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.hidden {
    display: none !important;
}

/* --------------------------------------------------------------------------
   Print / Export Styles
   -------------------------------------------------------------------------- */
@media print {
    body {
        background: white;
    }
    .app {
        box-shadow: none;
    }
    .screen__footer {
        display: none;
    }
}