:root {
    --bg-color: #09090b;
    --surface-color: rgba(255, 255, 255, 0.03);
    --surface-border: rgba(255, 255, 255, 0.08);
    --surface-hover: rgba(255, 255, 255, 0.06);
    --text-primary: #f8fafc;
    --text-secondary: #a1a1aa;
    --accent-color: #10b981; /* Dill Green */
    --accent-hover: #059669;
    --focus-ring: rgba(16, 185, 129, 0.3);
    --font-family: 'Inter', sans-serif;
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Atmospheric Glow Effects */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
}

.glow-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: var(--accent-color);
    animation: drift 20s ease-in-out infinite alternate;
}

.glow-2 {
    bottom: -10%;
    right: -10%;
    width: 40vw;
    height: 40vw;
    background: #3b82f6; /* Subtle blue for depth */
    animation: drift 25s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
    0% { transform: translate(0, 0); }
    100% { transform: translate(10%, 5%); }
}

/* Layout */
.app-container {
    width: 100%;
    max-width: 640px;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.logo .accent {
    color: var(--accent-color);
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    opacity: 0.8;
}

/* State Container & Animations */
.state-container {
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    
    /* Animation defaults */
    opacity: 0;
    transform: translateY(20px);
    animation: slideUpFadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUpFadeIn {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-out {
    animation: fadeOut 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeOut {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(-10px);
    }
}

/* Typography inside card */
.prompt-text {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 2rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.prompt-text.small {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Options */
.options-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.option-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    padding: 1.25rem 1.5rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.option-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-color);
    transform: scaleY(0);
    transition: transform var(--transition-speed) ease;
    transform-origin: bottom;
}

.option-btn:hover {
    background: var(--surface-hover);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateX(4px);
}

.option-btn:hover::before {
    transform: scaleY(1);
}

.option-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--focus-ring);
}

/* Input Form */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: all 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--focus-ring);
    background: rgba(0, 0, 0, 0.4);
}

.submit-btn {
    width: 100%;
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 1rem;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

.submit-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.6);
}

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

/* Success State */
.success-icon {
    width: 64px;
    height: 64px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem auto;
    color: var(--accent-color);
}

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

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

/* Loading State */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

@media (max-width: 640px) {
    .state-container {
        padding: 1.5rem;
    }
    .prompt-text {
        font-size: 1.125rem;
    }
}

/* Insights Box */
.insights-box {
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
    text-align: left;
}

.insights-title {
    color: var(--accent-color);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.insight-item {
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.5;
    position: relative;
    padding-left: 1.25rem;
}

.insight-item::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.insight-item:last-child {
    margin-bottom: 0;
}

.insight-item strong {
    color: #fff;
    font-weight: 600;
}