/* ===================================
   CSS Custom Properties (Variables)
   =================================== */
:root {
    /* Colors */
    --primary: #F97316;
    --primary-light: #FDBA74;
    --primary-dark: #EA580C;
    --background: #F5E1D0;
    --text-primary: #1C1917;
    --text-secondary: #57534E;
    --white: #FFFFFF;
    --error: #DC2626;
    --success: #16A34A;

    /* Typography */
    --font-display: 'DM Serif Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

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

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===================================
   Utility Classes
   =================================== */
.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;
}

/* ===================================
   Header
   =================================== */
.header {
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ===================================
   Tab Navigation
   =================================== */
.tab-nav {
    display: flex;
    gap: var(--space-xs);
}

.tab-btn {
    padding: var(--space-xs) var(--space-sm);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.tab-btn:hover {
    color: var(--text-primary);
    background-color: rgba(0, 0, 0, 0.05);
}

.tab-btn.active {
    color: var(--primary);
    background-color: rgba(249, 115, 22, 0.1);
}

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

/* ===================================
   Tab Content
   =================================== */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    text-decoration: none;
    color: var(--text-primary);
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo img {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--primary);
}

/* ===================================
   Main Content
   =================================== */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    text-align: center;
}

#tab-home {
    flex: 1;
    display: none;
    flex-direction: column;
}

#tab-home.active {
    display: flex;
}

.hero-content {
    max-width: 600px;
    width: 100%;
}

.hero-logo {
    margin-bottom: var(--space-lg);
}

.hero-logo img {
    width: 120px;
    height: 120px;
}

.hero-headline {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 400;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.hero-subheadline {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

/* ===================================
   Signup Form
   =================================== */
.signup-form {
    margin-bottom: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 420px;
    margin: 0 auto;
}

@media (min-width: 480px) {
    .form-group {
        flex-direction: row;
    }
}

.form-group input[type="email"] {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: 1rem;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-group input[type="email"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--shadow-md), 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.form-group input[type="email"]::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.btn-submit {
    position: relative;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-base);
    white-space: nowrap;
}

.btn-submit:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-loading {
    display: none;
    position: absolute;
    inset: 0;
    align-items: center;
    justify-content: center;
}

.btn-submit.loading .btn-text {
    visibility: hidden;
}

.btn-submit.loading .btn-loading {
    display: flex;
}

.spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Form Messages */
.form-message {
    margin-top: var(--space-sm);
    font-size: 0.875rem;
    min-height: 1.25rem;
}

.form-message.success {
    color: var(--success);
}

.form-message.error {
    color: var(--error);
}

/* ===================================
   Social Proof
   =================================== */
.social-proof {
    font-size: 0.875rem;
    color: var(--text-secondary);
    opacity: 0.8;
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: var(--space-lg);
    text-align: center;
}

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

/* ===================================
   Privacy Policy Page
   =================================== */
.policy-page {
    flex: 1;
    padding: var(--space-lg);
    padding-top: var(--space-md);
}

.policy-content {
    max-width: 800px;
    margin: 0 auto;
}

.policy-logo {
    text-align: center;
    margin-bottom: var(--space-md);
}

.policy-logo img {
    width: 60px;
    height: 60px;
}

.policy-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
    text-align: center;
}

.policy-section {
    margin-bottom: var(--space-xl);
}

.policy-section h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.policy-section p {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.policy-section ul {
    list-style: none;
    padding: 0;
    margin: var(--space-sm) 0;
}

.policy-section li {
    position: relative;
    padding-left: var(--space-md);
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.policy-section li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background-color: var(--primary);
    border-radius: 50%;
}

.policy-section li strong {
    color: var(--text-primary);
}

.policy-section a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.policy-section a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.policy-content-centered {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
}

.policy-content-centered .policy-logo img {
    width: 80px;
    height: 80px;
}

.policy-description {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
    max-width: 400px;
}

.btn-primary {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--radius-md);
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-base);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

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

@media (prefers-reduced-motion: no-preference) {
    .policy-content {
        animation: fadeInUp 0.6s ease-out;
    }
}

/* ===================================
   Animations
   =================================== */
@media (prefers-reduced-motion: no-preference) {
    .hero-content {
        animation: fadeInUp 0.6s ease-out;
    }
}

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