/* ==========================================================================
   Startup Equity Calculator - Emerald Theme
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Colors - Emerald Theme */
    --color-bg: #0a0f0d;
    --color-bg-elevated: #0f1613;
    --color-bg-card: rgba(15, 22, 19, 0.8);

    --color-primary: #10b981;
    --color-primary-glow: rgba(16, 185, 129, 0.4);
    --color-primary-dark: #059669;
    --color-accent: #34d399;
    --color-accent-glow: rgba(52, 211, 153, 0.3);

    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;

    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;

    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(16, 185, 129, 0.3);

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

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

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

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Animated Background
   -------------------------------------------------------------------------- */
.bg-animation {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.bg-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(16, 185, 129, 0.2), transparent),
        radial-gradient(ellipse 60% 40% at 20% 80%, rgba(52, 211, 153, 0.1), transparent);
}

.bg-grid {
    position: absolute;
    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: 50px 50px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black, transparent);
}

.bg-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.35;
    animation: float 25s ease-in-out infinite;
}

.bg-glow--1 {
    width: 500px;
    height: 500px;
    background: var(--color-primary);
    top: -150px;
    left: -100px;
}

.bg-glow--2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent);
    bottom: -100px;
    right: -100px;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(20px, -20px) scale(1.03); }
    66% { transform: translate(-15px, 15px) scale(0.97); }
}

/* --------------------------------------------------------------------------
   Container
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    padding-top: 80px;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(10, 15, 13, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.site-nav__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text);
}

.site-nav__icon {
    font-size: 1.25rem;
    color: var(--color-primary);
}

.site-nav__text {
    font-size: 1.1rem;
    font-weight: 700;
}

.site-nav__accent {
    color: var(--color-accent);
}

.site-nav__share {
    display: flex;
    gap: var(--spacing-sm);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.header__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.header__badge-icon {
    font-size: 1rem;
}

.header__title {
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header__tagline {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    box-shadow: 0 0 30px var(--color-primary-glow);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 50px var(--color-primary-glow);
}

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

.btn--secondary:hover {
    border-color: var(--color-border-hover);
    background: rgba(255, 255, 255, 0.05);
}

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

.btn--ghost:hover {
    color: var(--color-text);
    border-color: var(--color-border-hover);
}

.btn--small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.8125rem;
}

.btn--large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    width: 100%;
}

.btn svg {
    transition: transform var(--transition-fast);
}

.btn:hover svg {
    transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   Calculator Card
   -------------------------------------------------------------------------- */
.calculator-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.section-title svg {
    color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.form-section {
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.form-section:last-of-type {
    border-bottom: none;
    padding-bottom: 0;
}

.form-section__title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.form-section__title svg {
    opacity: 0.8;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-row:last-child {
    margin-bottom: 0;
}

@media (max-width: 500px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

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

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-prefix,
.input-suffix {
    position: absolute;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    pointer-events: none;
}

.input-prefix {
    left: var(--spacing-md);
}

.input-suffix {
    right: var(--spacing-md);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    padding-right: 60px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.form-input--currency {
    padding-left: 32px;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Hide number input spinners */
.form-input::-webkit-outer-spin-button,
.form-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.form-input[type=number] {
    -moz-appearance: textfield;
}

/* --------------------------------------------------------------------------
   Results Section
   -------------------------------------------------------------------------- */
.results-section {
    margin-top: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    animation: fadeInUp 0.4s ease;
}

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

/* Savings Hero (reused for equity value) */
.savings-hero {
    text-align: center;
    padding: var(--spacing-2xl);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(52, 211, 153, 0.1) 100%);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
}

.savings-hero__label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.savings-hero__amount {
    font-family: var(--font-mono);
    font-size: clamp(3rem, 10vw, 4.5rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.savings-hero__subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.stats-grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 600px) {
    .stats-grid--4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 500px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.stat-card {
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.stat-card--highlight {
    border-color: var(--color-primary);
    background: rgba(16, 185, 129, 0.08);
}

.stat-card__label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.stat-card__value {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.stat-card__value--negative {
    color: var(--color-danger);
}

.stat-card__unit {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* Breakdown Card */
.breakdown-card {
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.breakdown-card__title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.breakdown-card__title svg {
    color: var(--color-primary);
}

/* Vesting Timeline */
.vesting-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.vesting-year {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.vesting-year__label {
    flex-shrink: 0;
    width: 60px;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.vesting-year__bar-container {
    flex: 1;
    height: 24px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.vesting-year__bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-sm);
    transition: width 0.5s ease;
}

.vesting-year__bar--cliff {
    background: linear-gradient(90deg, var(--color-warning), #fbbf24);
}

.vesting-year__bar--vested {
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    opacity: 1;
}

.vesting-year__bar--future {
    background: rgba(16, 185, 129, 0.3);
}

.vesting-year__value {
    flex-shrink: 0;
    width: 80px;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.vesting-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

@media (max-width: 500px) {
    .vesting-summary {
        grid-template-columns: 1fr;
    }
}

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

.vesting-summary__label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.vesting-summary__value {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* Exit Scenarios */
.exit-scenarios {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.exit-scenario {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.exit-scenario:hover {
    background: rgba(255, 255, 255, 0.05);
}

.exit-scenario__left {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.exit-scenario__multiplier {
    font-weight: 600;
    color: var(--color-text);
}

.exit-scenario__valuation {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.exit-scenario__value {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-success);
}

.exit-scenario--highlight {
    border: 1px solid rgba(16, 185, 129, 0.3);
    background: rgba(16, 185, 129, 0.05);
}

.exit-scenario--highlight .exit-scenario__value {
    font-size: 1.5rem;
}

/* Disclaimer Card */
.disclaimer-card {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-lg);
}

.disclaimer-card__icon {
    flex-shrink: 0;
    color: var(--color-warning);
}

.disclaimer-card__content {
    flex: 1;
}

.disclaimer-card__title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-warning);
    margin-bottom: var(--spacing-sm);
}

.disclaimer-card__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.disclaimer-card__list li {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    padding-left: var(--spacing-md);
    position: relative;
}

.disclaimer-card__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 4px;
    height: 4px;
    background: var(--color-warning);
    border-radius: 50%;
}

.disclaimer-card__list li strong {
    color: var(--color-text);
}

.disclaimer-card__footer {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Share Card */
.share-card {
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.share-card__title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.share-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
}

.share-btn--twitter {
    background: #000;
    color: #fff;
    border: 1px solid #333;
}

.share-btn--twitter:hover {
    background: #1a1a1a;
}

.share-btn--linkedin {
    background: #0077b5;
    color: #fff;
}

.share-btn--linkedin:hover {
    background: #006097;
}

.share-btn--copy {
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.share-btn--copy:hover {
    border-color: var(--color-border-hover);
}

/* --------------------------------------------------------------------------
   Modal
   -------------------------------------------------------------------------- */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal__content {
    position: relative;
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-xl);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal__close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: color var(--transition-fast);
}

.modal__close:hover {
    color: var(--color-text);
}

.modal__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.modal__buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.modal__buttons .share-btn {
    width: 100%;
    justify-content: center;
    padding: var(--spacing-md);
}

/* --------------------------------------------------------------------------
   Toast
   -------------------------------------------------------------------------- */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.9375rem;
    animation: toastIn 0.3s ease;
    z-index: 1001;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

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

.footer__credit a {
    color: var(--color-primary);
    text-decoration: none;
}

.footer__credit a:hover {
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Accessibility
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

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

/* --------------------------------------------------------------------------
   Utility
   -------------------------------------------------------------------------- */
[hidden] {
    display: none !important;
}