/* ===================================
   Unsorted - Visual To Do List
   Landing Page Styles
   Apple-like aesthetic with dark mode
   =================================== */

/* CSS Variables */
:root {
    /* Light mode colors - Cleaner, more minimal */
    --bg-primary: #FFFFFF;
    --bg-secondary: #FAFAFA;
    --bg-tertiary: #F5F5F5;
    --text-primary: #000000;
    --text-secondary: #4A4A4A;
    --text-tertiary: #999999;
    --border-color: #E0E0E0;
    --shadow: rgba(0, 0, 0, 0.05);
    --shadow-hover: rgba(0, 0, 0, 0.1);

    /* Category colors */
    --color-school: #4A90E2;
    --color-work: #7B68EE;
    --color-personal: #50C878;
    --color-finance: #F4A460;
    --color-home: #E57373;

    /* Accent */
    --accent-color: #007AFF;
    --accent-hover: #0051D5;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing - More generous */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2.5rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

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

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

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1C1C1E;
        --bg-secondary: #2C2C2E;
        --bg-tertiary: #3A3A3C;
        --text-primary: #F8F9FA;
        --text-secondary: #A1A1A6;
        --text-tertiary: #8E8E93;
        --border-color: #38383A;
        --shadow: rgba(0, 0, 0, 0.3);
        --shadow-hover: rgba(0, 0, 0, 0.4);
    }
}

/* ===================================
   Reset & Base Styles
   =================================== */

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

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: var(--line-height-base);
}

/* ===================================
   Typography
   =================================== */

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.015em;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

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

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ===================================
   Layout
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* ===================================
   Header & Navigation
   =================================== */

header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    background-color: rgba(248, 249, 250, 0.8);
}

@media (prefers-color-scheme: dark) {
    header {
        background-color: rgba(28, 28, 30, 0.8);
    }
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 60px;
}

.nav-brand a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

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

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.nav-links a[aria-current="page"] {
    color: var(--accent-color);
}

@media (max-width: 480px) {
    .nav-links {
        gap: var(--spacing-sm);
    }

    .nav-links a {
        padding: var(--spacing-xs);
        font-size: 0.875rem;
    }
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    text-align: left;
    padding: var(--spacing-lg) var(--spacing-md);
    min-height: 95vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: var(--bg-primary);
}

/* Left column: Title + Tagline + Form */
.hero-left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.hero-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.hero-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    box-shadow: 0 2px 8px var(--shadow);
}

.hero-left h1 {
    margin-bottom: 0;
}

.hero-left .tagline {
    margin-left: 0;
    margin-right: 0;
    margin-bottom: var(--spacing-xs);
}

.hero-left .subtitle {
    margin: 0 0 var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-tertiary);
    line-height: 1.5;
    max-width: 100%;
}

.hero-left .waitlist-section {
    margin: 0;
}

.tagline {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.subtitle {
    font-size: clamp(0.9375rem, 1.5vw, 1rem);
    color: var(--text-tertiary);
    max-width: 550px;
    margin: 0 auto var(--spacing-md);
    line-height: 1.6;
}

/* Hero Two-Column Layout */
.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* Hero Screenshot Section */
.hero-screenshot {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.screenshot-heading {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.app-store-badge {
    margin-bottom: var(--spacing-xl);
}

.download-button {
    display: inline-block;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-hover);
}

.download-button:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

/* ===================================
   Bubble Demo
   =================================== */

.bubble-demo {
    position: relative;
    width: 100%;
    max-width: 600px;
    height: 300px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
}

.bubble {
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    text-align: center;
    padding: var(--spacing-sm);
    box-shadow: 0 4px 12px var(--shadow);
    transition: transform var(--transition-base);
    animation: float 6s ease-in-out infinite;
}

.bubble:hover {
    transform: scale(1.05);
}

.bubble-school { background: var(--color-school); }
.bubble-work { background: var(--color-work); }
.bubble-personal { background: var(--color-personal); }
.bubble-finance { background: var(--color-finance); }
.bubble-home { background: var(--color-home); }

.bubble:nth-child(1) { animation-delay: 0s; }
.bubble:nth-child(2) { animation-delay: 1s; }
.bubble:nth-child(3) { animation-delay: 2s; }
.bubble:nth-child(4) { animation-delay: 3s; }
.bubble:nth-child(5) { animation-delay: 4s; }

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

@media (max-width: 768px) {
    .bubble-demo {
        height: 250px;
    }

    .bubble {
        font-size: 0.75rem;
    }
}

/* ===================================
   Features Section
   =================================== */

.features {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
}

.features h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-hover);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Screenshot Section
   =================================== */

.screenshot-section {
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.screenshot-section h2 {
    margin-bottom: var(--spacing-lg);
}

.screenshot-placeholder {
    background-color: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    max-width: 500px;
    width: 100%;
    margin: 0 auto;
    min-height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

.screenshot-placeholder p {
    font-size: 1rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-md);
}

/* Bubble demo inside screenshot placeholder */
.screenshot-placeholder .bubble-demo {
    margin-top: var(--spacing-md);
    height: 350px;
}

/* Video Container */
.video-container {
    width: 100%;
    max-width: 350px;
    margin: 0 auto;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.video-container video {
    width: 100%;
    height: auto;
    display: block;
}

@media (max-width: 768px) {
    .video-container {
        max-width: 280px;
    }
}

/* ===================================
   Privacy Callout
   =================================== */

.privacy-callout {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
    text-align: center;
}

.privacy-callout h2 {
    margin-bottom: var(--spacing-md);
}

.privacy-callout p {
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-md);
}

.link-button {
    display: inline-block;
    font-weight: 600;
    color: var(--accent-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.link-button:hover {
    background-color: var(--bg-tertiary);
    transform: translateX(4px);
}

/* ===================================
   Footer
   =================================== */

footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
}

footer .container {
    text-align: center;
}

footer p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.footer-links span {
    color: var(--text-tertiary);
}

/* ===================================
   Legal Pages
   =================================== */

.legal-page {
    padding: var(--spacing-xl) 0;
    max-width: 900px;
    margin: 0 auto;
}

.legal-page h1 {
    margin-bottom: var(--spacing-sm);
}

.last-updated {
    color: var(--text-tertiary);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-lg);
}

.legal-page section {
    margin-bottom: var(--spacing-lg);
}

.legal-page h2 {
    font-size: 1.75rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.legal-page h3 {
    font-size: 1.25rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

.legal-page ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.legal-page li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.7;
}

.legal-page strong {
    color: var(--text-primary);
    font-weight: 600;
}

.legal-page a {
    color: var(--accent-color);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.legal-page a:hover {
    border-bottom-color: var(--accent-color);
}

/* TL;DR Box */
.tldr-box {
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-left: 4px solid var(--accent-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.tldr-box p {
    margin-bottom: var(--spacing-sm);
}

.tldr-box p:last-child {
    margin-bottom: 0;
}

.tldr-box ul {
    list-style: none;
    margin-left: 0;
}

.tldr-box li {
    padding-left: var(--spacing-sm);
}

/* ===================================
   Waitlist Form
   =================================== */

.waitlist-section {
    max-width: 380px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 2px 12px var(--shadow);
    text-align: left;
}

.waitlist-heading {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 0.25rem;
    text-align: center;
    color: var(--text-primary);
}

.waitlist-subheading {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.waitlist-form {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.form-group label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"] {
    padding: 0.5rem 0.75rem;
    font-size: 0.8125rem;
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus {
    border-color: var(--text-primary);
    background-color: var(--bg-primary);
    box-shadow: 0 0 0 1px var(--text-primary);
}

.form-group input[type="text"]:hover,
.form-group input[type="email"]:hover {
    border-color: var(--text-tertiary);
}

.form-group input[type="text"]::placeholder,
.form-group input[type="email"]::placeholder {
    color: var(--text-tertiary);
}

/* Invalid state */
.form-group input[type="email"]:invalid:not(:placeholder-shown) {
    border-color: #FF3B30;
}

.form-group input[type="email"]:invalid:not(:placeholder-shown):focus {
    box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.1);
}

/* Checkbox group */
.form-group-checkbox {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.form-group-checkbox input[type="checkbox"] {
    margin-top: 0.25rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-color);
}

.form-group-checkbox label {
    flex: 1;
    font-size: 0.875rem;
    font-weight: 400;
    cursor: pointer;
}

.required {
    color: #FF3B30;
    font-weight: 600;
}

.form-note {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    line-height: 1.4;
    margin-top: 0;
}

.form-note a {
    color: var(--accent-color);
    text-decoration: underline;
}

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

/* Primary Button */
.btn-primary {
    width: 100%;
    padding: 0.625rem 1rem;
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: var(--font-primary);
    color: white;
    background-color: var(--text-primary);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: none;
}

.btn-primary:hover {
    background-color: var(--text-secondary);
    transform: translateY(-1px);
}

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

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Success Message */
.waitlist-success {
    text-align: center;
    padding: var(--spacing-md);
}

.success-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    background-color: var(--color-personal);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    animation: successPop 0.5s ease-out;
}

@keyframes successPop {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.waitlist-success h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.waitlist-success p {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .waitlist-section {
        padding: var(--spacing-md);
        margin: var(--spacing-md) auto;
    }

    .waitlist-heading {
        font-size: 1.5rem;
    }

    .waitlist-subheading {
        font-size: 0.9375rem;
    }

    .form-group input[type="text"],
    .form-group input[type="email"] {
        padding: 0.625rem 0.875rem;
        font-size: 0.9375rem;
    }

    .btn-primary {
        padding: 0.75rem 1.25rem;
        font-size: 0.9375rem;
    }
}

/* ===================================
   Accessibility
   =================================== */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

/* ===================================
   Print Styles
   =================================== */

@media print {
    header,
    footer,
    .bubble-demo,
    .app-store-badge,
    .screenshot-section {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    a {
        color: black;
        text-decoration: underline;
    }
}

/* ===================================
   Performance & Loading
   =================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}