/* ============================================
   Links Page - Styles
   ============================================ */

:root {
    /* Colors from React component */
    --color-teal: #5EADB5;
    --color-peach: #E8B4A0;
    --color-mint: #A0C4B8;
    --color-purple: #C4A0D8;
    --color-dark: #111213;
    --color-light: #ffffff;
    --color-bg: #F5F3EF;
    --color-border: #E8E4DE;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;

    /* Border Radius */
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-dark);
    line-height: 1.6;
    background: linear-gradient(to bottom, rgba(245, 243, 239, 0.5), var(--color-light));
    min-height: 100vh;
}

/* ============================================
   Main Container
   ============================================ */
.links-page {
    min-height: 100vh;
}

.links-container {
    max-width: 1152px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

@media (min-width: 1024px) {
    .links-container {
        padding: 64px var(--spacing-lg);
    }
}

/* ============================================
   Header Section
   ============================================ */
.links-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.links-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-dark);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

@media (min-width: 768px) {
    .links-title {
        font-size: 3rem;
    }
}

.links-authors {
    font-size: 1.125rem;
    color: rgba(17, 18, 19, 0.6);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Email Form
   ============================================ */
.email-form {
    max-width: 448px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.input-group {
    display: flex;
    gap: 12px;
    width: 100%;
}

@media (max-width: 640px) {
    .input-group {
        flex-direction: column;
    }
}

.email-input-wrapper {
    position: relative;
    flex: 1;
}

.email-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: rgba(17, 18, 19, 0.4);
    pointer-events: none;
}

#email-input {
    width: 100%;
    height: 56px;
    padding: 0 16px 0 48px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-dark);
    background: var(--color-light);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#email-input::placeholder {
    color: rgba(17, 18, 19, 0.4);
}

#email-input:focus {
    outline: none;
    border-color: var(--color-teal);
    box-shadow: 0 0 0 3px rgba(94, 173, 181, 0.15);
}

.submit-btn {
    height: 56px;
    padding: 0 32px;
    background: var(--color-dark);
    color: var(--color-light);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    white-space: nowrap;
}

.submit-btn:hover {
    background: rgba(17, 18, 19, 0.9);
    transform: translateY(-2px);
}

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

.arrow-icon {
    width: 20px;
    height: 20px;
}

/* ============================================
   Consent Checkbox
   ============================================ */
.consent-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    max-width: 448px;
    margin: 16px auto 0;
    cursor: pointer;
}

.consent-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-light);
    transition: all 0.2s ease;
    position: relative;
    margin-top: 2px;
}

.consent-label:hover .checkmark {
    border-color: var(--color-teal);
}

.consent-label input[type="checkbox"]:checked~.checkmark {
    background: var(--color-teal);
    border-color: var(--color-teal);
}

.checkmark::after {
    content: '';
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.consent-label input[type="checkbox"]:checked~.checkmark::after {
    display: block;
}

.consent-text {
    font-size: 0.875rem;
    color: rgba(17, 18, 19, 0.6);
    line-height: 1.5;
}

.consent-label.shake .checkmark {
    border-color: #dc2626;
    animation: shake 0.5s ease;
}

.consent-label.highlight .checkmark {
    border-color: var(--color-teal);
    box-shadow: 0 0 0 3px rgba(94, 173, 181, 0.3);
}

/* ============================================
   Success Message
   ============================================ */
.success-message {
    max-width: 448px;
    margin: 0 auto;
    background: rgba(94, 173, 181, 0.1);
    border: 1px solid rgba(94, 173, 181, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: none;
    opacity: 0;
    transform: scale(0.95);
}

.success-message.visible {
    display: block;
    animation: scaleIn 0.4s ease forwards;
}

.success-message p {
    color: var(--color-dark);
    font-weight: 500;
}

/* ============================================
   Features Grid
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   Feature Card
   ============================================ */
.feature-card {
    width: 100%;
    text-align: left;
    border: 1px solid rgba(232, 228, 222, 0.5);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast), opacity 0.5s ease;
    font-family: inherit;
}

.feature-card:nth-child(1) {
    background: linear-gradient(135deg, rgba(94, 173, 181, 0.1), rgba(94, 173, 181, 0.05));
}

.feature-card:nth-child(2) {
    background: linear-gradient(135deg, rgba(232, 180, 160, 0.1), rgba(232, 180, 160, 0.05));
}

.feature-card:nth-child(3) {
    background: linear-gradient(135deg, rgba(160, 196, 184, 0.1), rgba(160, 196, 184, 0.05));
}

.feature-card:nth-child(4) {
    background: linear-gradient(135deg, rgba(196, 160, 216, 0.1), rgba(196, 160, 216, 0.05));
}

.feature-card:disabled {
    cursor: not-allowed;
    opacity: 0.7;
    pointer-events: auto;
    /* Allow click events on disabled buttons */
}

.feature-card:disabled .feature-card-inner {
    opacity: 0.7;
}

.feature-card.is-locked {
    cursor: not-allowed;
    opacity: 0.7;
}

.feature-card.is-locked .feature-card-inner {
    opacity: 0.7;
}

.feature-card:not(.is-locked):hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.1);
    border-color: transparent;
}

.feature-card:not(.is-locked):active {
    transform: translateY(-4px) scale(0.98);
}

.feature-card-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Feature Icon */
.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-fast);
}

.feature-card:not(.is-locked):hover .feature-icon {
    transform: scale(1.1);
}

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

/* Feature Title */
.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 12px;
}

/* Feature Description */
.feature-description {
    color: rgba(17, 18, 19, 0.6);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

/* Feature CTA */
.feature-cta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.feature-card:not(.is-locked):hover .feature-cta {
    opacity: 1;
    transform: translateX(0);
}

.feature-cta svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   Info Text
   ============================================ */
.info-text {
    text-align: center;
    font-size: 0.875rem;
    color: rgba(17, 18, 19, 0.4);
    margin-top: var(--spacing-xl);
}

.info-text.hidden {
    display: none;
}

/* ============================================
   Animations (only for success message)
   ============================================ */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ============================================
   Logged In State
   ============================================ */
.logged-in .feature-card {
    opacity: 1;
    cursor: pointer;
}

.logged-in .feature-card .feature-card-inner {
    opacity: 1;
}

/* ============================================
   Utility
   ============================================ */
.hidden {
    display: none !important;
}

/* ============================================
   Focus States (Accessibility)
   ============================================ */
.submit-btn:focus-visible,
.feature-card:focus-visible {
    outline: 2px solid var(--color-teal);
    outline-offset: 2px;
}

#email-input:focus-visible {
    outline: none;
}