@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Main Branding */
    --primary: #10b981;
    --background: #fcfcfc;
    --surface: rgba(255, 255, 255, 0.7);
    --surface-border: rgba(0, 0, 0, 0.05);
    --surface-stroke: rgba(0, 0, 0, 0.02);
    --shadow-premium: 0 20px 40px -10px rgba(0, 0, 0, 0.1);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --input-bg: rgba(255, 255, 255, 0.9);
    --tab-bg: #ecfdf5;
    --tab-active: white;
    --card-secondary-bg: white;
    --accent-glow: rgba(16, 185, 129, 0.05);
    --dot-color: rgba(0, 0, 0, 0.05);
}

.dark {
    --background: #030405; /* Cyber Charcoal only in dark mode */
    --surface: rgba(15, 23, 42, 0.3);
    --surface-border: rgba(255, 255, 255, 0.08); /* Brighter for refraction */
    --surface-stroke: rgba(255, 255, 255, 0.05);
    --shadow-premium: 0 20px 40px -10px rgba(0, 0, 0, 0.6), 0 0 20px -5px rgba(16, 185, 129, 0.15);
    --text-main: #ffffff; /* Peak white for contrast */
    --text-muted: #94a3b8; /* Brighter slate for readability */
    --input-bg: rgba(30, 41, 59, 0.5);
    --tab-bg: #064e3b;
    --tab-active: #10b981;
    --card-secondary-bg: rgba(15, 23, 42, 0.5);
    --dot-color: rgba(255, 255, 255, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
    background-color: var(--background);
    color: var(--text-main);
    font-family: 'Geist', sans-serif;
    min-height: 100dvh;
    background-image: radial-gradient(var(--dot-color) 1px, transparent 1px);
    background-size: 16px 16px;
    transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: -0.01em;
    padding: 2rem 0;
    line-height: 1.6;
}

/* Premium Navigation/Toggle */
#themeToggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
    width: 3rem;
    height: 3rem;
    aspect-ratio: 1/1;
    border-radius: 50%;
    background: var(--surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--surface-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-premium);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#themeToggle:hover {
    transform: scale(1.1) rotate(12deg);
    border-color: var(--tab-active);
}

#themeToggle .sun { display: none; }
.dark #themeToggle .sun { display: block; fill: #fbbf24; }
.dark #themeToggle .moon { display: none; }

/* Glassmorphism Logic */
.glass-panel {
    background: var(--surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--surface-border);
    border-radius: 2rem;
    box-shadow: var(--shadow-premium);
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
    min-height: fit-content;
}

.result-card {
    word-break: break-all;
    overflow-wrap: break-word;
}

.glass-panel::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    border: 0.5px solid var(--surface-stroke);
    border-radius: inherit;
}

.glass-panel:hover {
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.2);
}

/* Typography Extensions */
.text-gradient {
    background: linear-gradient(135deg, #059669 0%, #10b981 50%, #0ea5e9 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

/* Tabs */
.tab-container {
    background: var(--tab-bg);
}

.tab-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
    color: var(--text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
}

.tab-btn.active {
    background: var(--tab-active);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    color: var(--primary-dark);
}

.dark .tab-btn.active {
    color: white;
}

/* Premium Inputs */
.input-field {
    background: var(--input-bg);
    border: 2px solid var(--surface-border);
    border-radius: 1rem;
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    width: 100%;
    color: var(--text-main);
    transition: all 0.2s ease;
}

.input-field:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
    transform: translateY(-1px);
}

/* Add custom mode toggle logic */
#goalTab .mode-btn {
    background: var(--input-bg);
    color: var(--text-muted);
    transition: all 0.3s ease;
}

#goalTab .mode-btn.active {
    background: var(--tab-active);
    color: var(--primary-dark);
}

/* Custom Range */
input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    background: transparent;
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    background: var(--surface-border);
    border-radius: 4px;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 24px;
    width: 24px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    margin-top: -8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 2px solid white;
    transition: transform 0.1s ease;
}

/* Result Cards */
.result-display {
    background: linear-gradient(135deg, #065f46 0%, #047857 100%);
    border-radius: 1.5rem;
    padding: 1.5rem;
    color: white;
    text-align: center;
    box-shadow: 0 10px 25px -5px rgba(6, 95, 70, 0.3);
}

.result-card-white {
    background: var(--card-secondary-bg);
    border: 2px solid var(--surface-border);
    color: var(--text-main);
}

.result-label {
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.75rem;
    font-weight: 700;
    opacity: 0.8;
}

.result-value {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.03em;
    font-variant-numeric: tabular-nums;
}

/* Conversational Summary Adjustments */
.summary-box {
    background: var(--tab-bg);
    border: 1px solid var(--surface-border);
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* FAQ Overrides */
.faq-box {
    background: var(--background);
    border: 1px solid var(--surface-border);
}

/* Mobile Adjustments */
@media (max-width: 640px) {
    body {
        padding: 1rem 0;
    }

    .glass-panel {
        padding: 1.25rem !important;
        border-radius: 1.5rem;
    }
    
    .result-value {
        font-size: 1.75rem;
    }

    #themeToggle {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 3rem !important;
        height: 3rem !important;
        aspect-ratio: 1/1 !important;
    }

    header {
        margin-bottom: 3rem !important;
    }
}