/* ========================================
   CSS VARIABLES
   ======================================== */
:root {
    /* Colors */
    --color-primary: #143695;
    --color-primary-hover: #0d2566;
    --color-text: #141414;
    --color-text-secondary: #6b7280;
    --color-border: #e5e7eb;
    --color-bg-white: #fff;
    --color-bg-light: #f8f9fa;

    /* Typography */
    --font-sans:
        "Noto Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
    --font-serif: "Roboto Serif", serif;

    /* Spacing */
    --spacing-section: 48px;
    --spacing-container: 40px;

    /* Layout */
    --max-width-content: 800px;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    line-height: 1.5;
    font-size: 16px;
    color: var(--color-text);
    background-color: var(--color-bg-white);
}

.container {
    margin: 0 auto;
    padding: var(--spacing-section) var(--spacing-container);
    max-width: var(--max-width-content);
}

/* ========================================
   HEADER
   ======================================== */
.header {
    background-color: var(--color-bg-white);
    padding: 16px var(--spacing-container);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.logo img {
    height: 24px;
}

.logo-mark {
    display: none;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    text-decoration: none;
    color: var(--color-text-secondary);
    transition: color 0.2s;
}

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

/* ========================================
   BUTTONS
   ======================================== */
.cta-btn-small,
.cta-btn {
    background-color: var(--color-primary);
    color: var(--color-bg-white);
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
}

.cta-btn-small {
    padding: 8px 20px;
}

.cta-btn {
    padding: 12px 24px;
    white-space: nowrap;
}

.cta-btn-small:hover,
.cta-btn:hover {
    background-color: var(--color-primary-hover);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    background-color: var(--color-bg-white);
    background-image:
        linear-gradient(#f3f3f3 0.1em, transparent 0.1em),
        linear-gradient(90deg, #f3f3f3 0.1em, transparent 0.1em);
    background-size: 24px 24px;
    background-position: -1px -1px;
    border-bottom: 1px solid var(--color-border);
}

.hero h1 {
    font-family: var(--font-serif);
    font-size: 72px;
    line-height: 1;
    font-weight: 700;
    margin-bottom: 24px;
}

.subtitle {
    font-family: var(--font-serif);
    font-size: 24px;
    line-height: 2;
    font-style: italic;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.abstract-box {
    margin: 0 auto 24px;
    padding: 0 0 0 24px;
    border-left: 2px solid var(--color-primary);
    text-align: left;
}

.abstract-box p {
    margin-bottom: 24px;
}

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

.keywords {
    color: var(--color-text-secondary);
}

.waitlist-text {
    margin-bottom: 24px;
}

/* Email Signup */
.email-signup {
    display: flex;
    justify-content: left;
    gap: 12px;
    width: 66%;
    margin: 0;
}

.email-signup input {
    flex: 1;
    padding: 15px 8px;
    border: 1px solid var(--color-primary);
}

.email-signup input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* ========================================
   SECTION COMMON STYLES
   ======================================== */

ul,
ol,
p {
    margin-bottom: 24px;
}

li {
    margin-left: 16px;
}

.section-label {
    font-size: 16px;
    line-height: 1.5;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 24px;
}

/* ========================================
   FEATURES SECTION
   ======================================== */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.feature-card {
    text-align: left;
    border: 1px solid var(--color-border);
    padding: 24px;
}

.feature-card h3 {
    font-weight: 700;
    margin-bottom: 12px;
    font-family: var(--font-serif);
}

.feature-card p {
    color: var(--color-text-secondary);
}

.feature-image {
    background-color: var(--color-bg-light);
    padding: 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-top: 24px;
}

img {
    max-width: 100%;
}

.feature-image img {
    max-width: 100%;
    height: 48px;
}

.caption {
    color: var(--color-text-secondary);
    font-style: italic;
    margin-top: 24px;
    text-align: center;
}

/* ========================================
   WORKFLOW SECTION
   ======================================== */
.workflow {
    background-color: var(--color-bg-light);
}

.workflow-steps-container {
    background-color: var(--color-bg-white);
    padding: 48px;
    border: 1px solid var(--color-border);
}

.workflow-step {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
}

.workflow-step:last-child {
    margin-bottom: 0;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background-color: var(--color-bg-white);
    border: 2px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.step-content h3 {
    font-size: 16px;
    font-family: var(--font-serif);
    font-weight: 600;
    margin-bottom: 8px;
}

.step-content p {
    color: var(--color-text-secondary);
}

/* ========================================
   PRICING SECTION
   ======================================== */

.pricing-intro {
    margin: 0 auto 48px;
}

.pricing-comparison {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
}

.pricing-card {
    padding: 32px;
    background-color: var(--color-bg-white);
}

.pricing-card.traditional {
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
}

.pricing-card.proxima {
    border: 2px solid var(--color-primary);
}

.pricing-card h3 {
    font-weight: 600;
    margin-bottom: 8px;
    font-family: var(--font-serif);
}

.pricing-card.traditional h3 {
    font-size: 16px;
}

.pricing-card.proxima h3 {
    font-size: 20px;
}

.pricing-card .description {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.pricing-card.proxima .description {
    font-size: 20px;
}

.pricing-card .price {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 32px;
    font-family: var(--font-serif);
}

.pricing-card.traditional .price {
    font-size: 24px;
}

.pricing-card .period {
    font-size: 16px;
    font-weight: 400;
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
}

.pricing-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
}

.pricing-row span:first-child {
    color: var(--color-text-secondary);
}

.pricing-row span:last-child {
    font-weight: 500;
}

/* ========================================
   WAITLIST SECTION
   ======================================== */
.waitlist-section {
    background-color: var(--color-bg-light);
}

.waitlist-section h2 {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
}

.waitlist-section p {
    margin-bottom: 32px;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background-color: var(--color-bg-light);
    padding: 32px 0;
    text-align: center;
}

.footer p {
    color: #999;
}

/* ========================================
   MODAL
   ======================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow: auto;
}

.modal-content {
    background-color: var(--color-bg-white);
    margin: 5% auto;
    padding: 40px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    max-width: 600px;
    position: relative;
}

.modal-close {
    color: var(--color-text-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    transition: color 0.2s;
}

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

.modal-content h2 {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.modal-content > p {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 16px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

#waitlistForm .cta-btn {
    width: 100%;
    margin-top: 8px;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    :root {
        --spacing-section: 60px;
        --spacing-container: 24px;
    }

    .header .container {
        padding: 0 var(--spacing-container);
    }

    .logo span {
        display: none;
    }

    .logo-full {
        display: none;
    }

    .logo-mark {
        display: block;
    }

    .nav {
        gap: 12px;
    }

    .nav a {
        font-size: 12px;
    }

    .cta-btn-small {
        padding: 6px 12px;
        font-size: 12px;
    }

    .hero h1 {
        font-size: 48px;
    }

    .subtitle {
        font-size: 16px;
    }

    .feature-grid,
    .pricing-comparison {
        grid-template-columns: 1fr;
    }

    .email-signup {
        flex-direction: column;
        width: 100%;
    }

    .email-signup input,
    .cta-btn {
        width: 100%;
    }

    .workflow-step {
        flex-direction: column;
        gap: 12px;
    }

    .downloads-container {
        flex-direction: column;
    }

    .download-btn {
        width: 100%;
    }
}

/* ========================================
   CARD SORT PAGE SPECIFIC STYLES
   ======================================== */
.card-sort-page input[type="number"] {
    width: 25%;
    margin-bottom: 8px;
    padding: 11px 8px;
    border: 1px solid var(--color-primary);
}

.card-sort-page textarea,
input[type="text"] {
    width: 100%;
    margin-bottom: 8px;
    padding: 11px 8px;
    border: 1px solid var(--color-primary);
    font-family: var(--font-sans);
    font-size: 16px;
    color: var(--color-text);
}

.card-sort-page input[type="file"] {
    margin-bottom: 8px;
}

.card-sort-page button[type="submit"] {
    display: block;
    width: 50%;
    margin: 24px 0;
}

.card-sort-page h1,
.card-sort-page h2,
.card-sort-page h3 {
    font-family: Roboto Serif;
}

form label {
    font-weight: 600;
    font-family: Roboto Serif;
}

form h2 {
    margin-top: 24px;
}

details {
    margin-bottom: 16px;
}

#loading,
#results {
    margin-top: 48px;
}

/* Password screen styles */
#passwordScreen {
    max-width: 400px;
    margin: 100px auto;
    padding: 32px;
    text-align: center;
}

#passwordScreen h1 {
    margin-bottom: 24px;
}

#passwordScreen input {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    margin: 24px 0;
    border: 1px solid var(--color-border);
}

#passwordScreen button {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    background-color: var(--color-primary);
    color: var(--color-bg-white);
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#passwordScreen button:hover {
    background-color: var(--color-primary-hover);
}

.error {
    color: #dc3545;
    margin-top: 10px;
}

#appContent {
    display: none;
}

/* Analysis text styling */
#analysisText {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    white-space: pre-wrap;
    color: var(--color-text);
}

/* Downloads section */
.downloads-container {
    display: flex;
    flex-direction: row;
    gap: 8px;
    margin-bottom: 48px;
}

.download-btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--color-bg-light);
    color: var(--color-text);
    text-decoration: none;
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    font-weight: 500;
}

.download-btn:hover {
    background-color: var(--color-border);
}