/* =========================================
   Words That Bridge — Ivy's ToM Tool 🌿
   A reflective exploration of language and perspective
   ========================================= */

/* === CSS Custom Properties === */
:root {
    /* Colors - Warm Dark Theme */
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-card: #242424;
    --bg-card-hover: #2a2a2a;

    /* Text */
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;

    /* Accent - Ivy Green 🌿 */
    --accent: #22c55e;
    --accent-soft: rgba(34, 197, 94, 0.15);
    --accent-glow: rgba(34, 197, 94, 0.3);
    --accent-dark: #16a34a;

    /* Borders */
    --border-color: #333333;
    --border-focus: var(--accent);

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;

    /* Typography */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-serif: Georgia, "Times New Roman", serif;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--accent);
    color: #000;
}

/* === App Container === */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* === Screens === */
.screen {
    display: none;
    flex: 1;
    padding: var(--spacing-xl);
    animation: fadeIn var(--transition-slow) ease;
}

.screen.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.screen-content {
    max-width: 600px;
    width: 100%;
    text-align: center;
}

/* === Welcome Screen === */
.logo {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

#screen-welcome h1 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.tagline {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.intro-text {
    margin-bottom: var(--spacing-2xl);
}

.intro-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.meta-info {
    margin-top: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    min-height: 44px;
    /* Ensure adequate touch target */
}

.btn-primary {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* === Question Screen === */
.question-header {
    margin-bottom: var(--spacing-2xl);
}

.question-number {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.question-prompt {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    font-style: italic;
}

/* === Choice Cards === */
.choices {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.choice-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
    font-family: inherit;
    color: var(--text-primary);
    min-height: 64px;
    /* Ensure adequate touch target for choice buttons */
}

.choice-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.choice-card:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.choice-card.selected {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.choice-text {
    font-size: 1.125rem;
    line-height: 1.6;
}

.choice-divider {
    color: var(--text-muted);
    font-style: italic;
    padding: var(--spacing-sm) 0;
}

/* === Progress Dots === */
.progress-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.progress-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: var(--border-color);
    transition: all var(--transition-normal);
}

.progress-dot.active {
    background: var(--accent);
}

.progress-dot.completed {
    background: var(--accent-dark);
}

/* === Results Screen === */
.results-header {
    margin-bottom: var(--spacing-2xl);
}

.results-header h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 400;
    margin-top: var(--spacing-md);
}

.results-subtitle {
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

/* === Spectrum === */
.spectrum-container {
    margin: var(--spacing-2xl) 0;
}

.spectrum-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.spectrum-bar {
    position: relative;
    height: 8px;
    background: var(--bg-card);
    border-radius: var(--radius-full);
    overflow: visible;
}

.spectrum-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--text-muted) 0%, var(--accent) 100%);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.spectrum-marker {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background: var(--accent);
    border: 3px solid var(--bg-primary);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-glow);
    transition: left var(--transition-slow);
}

/* === Profile Card === */
.profile-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.profile-card h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--accent);
    margin-bottom: var(--spacing-md);
}

.profile-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* === Quote Card === */
.quote-card {
    background: var(--accent-soft);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    text-align: left;
}

.quote-text {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.quote-author {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* === Results Actions === */
.results-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* === Learn Screen === */
.learn-content {
    text-align: left;
    max-width: 650px;
}

.learn-content h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 400;
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.learn-section {
    margin-bottom: var(--spacing-2xl);
}

.learn-section h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--accent);
    margin-bottom: var(--spacing-md);
}

.learn-section p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.learn-section .highlight {
    color: var(--text-primary);
    font-size: 1.125rem;
}

.learn-cta {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.learn-quote {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.125rem;
    color: var(--accent);
    margin-bottom: var(--spacing-xl);
}

/* === Footer === */
.footer {
    padding: var(--spacing-lg);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}

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

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

.footer .divider {
    margin: 0 var(--spacing-sm);
    opacity: 0.5;
}

/* === Modal === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    z-index: 1000;
    animation: fadeIn var(--transition-fast);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp var(--transition-normal);
}

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

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-header {
    text-align: center;
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.modal-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.modal-header h2 {
    font-family: var(--font-serif);
    font-weight: 400;
}

.modal-content {
    padding: var(--spacing-xl);
}

.modal-section {
    margin-bottom: var(--spacing-xl);
}

.modal-section h3 {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: var(--spacing-sm);
}

.modal-section p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-sm);
}

.modal-section a {
    color: var(--accent);
    text-decoration: none;
}

.modal-section a:hover {
    text-decoration: underline;
}

.modal-quote {
    text-align: center;
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--text-secondary);
    padding: var(--spacing-lg);
    background: var(--accent-soft);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.modal-quote span {
    display: block;
    margin-top: var(--spacing-sm);
    font-style: normal;
}

.modal-copyright {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* === Noscript === */
.noscript-message {
    padding: var(--spacing-2xl);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.noscript-message h1 {
    font-family: var(--font-serif);
    margin-bottom: var(--spacing-lg);
}

/* === Journal Section === */
.journal-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.journal-section h4 {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
}

.journal-prompt {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-md);
}

.journal-textarea {
    width: 100%;
    min-height: 100px;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    line-height: 1.6;
    resize: vertical;
    transition: border-color var(--transition-normal);
}

.journal-textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.journal-textarea::placeholder {
    color: var(--text-muted);
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
}

.journal-saved {
    display: none;
    margin-left: var(--spacing-md);
    color: var(--accent);
    font-size: 0.875rem;
    animation: fadeIn var(--transition-fast);
}

.journal-saved.visible {
    display: inline;
}

/* === Sister App Card === */
.sister-app-card {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(34, 197, 94, 0.1) 100%);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.sister-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.sister-header span {
    font-size: 1.5rem;
}

.sister-header h4 {
    font-family: var(--font-serif);
    font-weight: 400;
    font-size: 1.125rem;
}

.sister-app-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.9375rem;
}

.btn-kai {
    background: #3b82f6;
    color: white;
    border-color: #3b82f6;
    text-decoration: none;
    display: inline-flex;
    margin-bottom: var(--spacing-md);
}

.btn-kai:hover {
    background: #2563eb;
    border-color: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.sister-note {
    font-size: 0.8125rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 0;
}

/* === Responsive === */

/* Small Mobile (< 480px) */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .app-container {
        padding: 0.75rem 0.5rem;
    }

    .screen {
        padding: var(--spacing-md);
    }

    #screen-welcome h1 {
        font-size: 1.75rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .logo {
        font-size: 2.75rem;
    }

    .intro-text {
        font-size: 0.95rem;
    }

    .meta-info {
        font-size: 0.75rem;
    }

    .choice-card {
        padding: 1rem;
    }

    .choice-text {
        font-size: 0.9rem;
    }

    .results-actions {
        flex-direction: column;
        gap: 0.75rem;
    }

    .results-actions .btn {
        width: 100%;
    }

    .journal-section {
        padding: 1rem;
    }

    .sister-app-card {
        padding: 1rem;
    }

    .spectrum-bar {
        height: 8px;
    }
}

/* Mobile (481px - 640px) */
@media (min-width: 481px) and (max-width: 640px) {
    .app-container {
        padding: 1rem;
    }

    .screen {
        padding: var(--spacing-lg);
    }

    #screen-welcome h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1.125rem;
    }

    .logo {
        font-size: 3rem;
    }

    .choice-card {
        padding: var(--spacing-lg);
    }

    .choice-text {
        font-size: 1rem;
    }

    .results-actions {
        flex-direction: column;
    }

    .results-actions .btn {
        width: 100%;
    }

    .journal-section,
    .sister-app-card {
        padding: var(--spacing-lg);
    }
}

/* Tablet (641px - 1024px) */
@media (min-width: 641px) and (max-width: 1024px) {
    .app-container {
        max-width: 600px;
        padding: 1.5rem;
    }

    #screen-welcome h1 {
        font-size: 2.25rem;
    }

    .choices {
        max-width: 500px;
    }
}

/* Touch devices - improve tap feedback */
@media (hover: none) {
    .choice-card:active {
        transform: scale(0.97);
    }

    .btn:active {
        transform: scale(0.98);
    }

    .sister-app-card:active {
        transform: scale(0.98);
    }
}