:root {
    --color-primary: #bf323b;
    --color-primary-dark: #8f1f27;
    --color-text: #222222;
    --color-text-muted: #6e6e6e;
    --color-border: #e5e5e5;
    --color-bg: #ffffff;
    --color-bg-soft: #f6f6f6;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Malgun Gothic", -apple-system, sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Header */
.site-header {
    border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.site-nav__member {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--color-text-muted);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 9px 20px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
}

.btn--primary {
    background-color: var(--color-primary);
    color: #ffffff;
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
}

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

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

.btn--block {
    width: 100%;
    text-align: center;
}

/* Hero */
.hero {
    background-color: var(--color-bg-soft);
    padding: 90px 24px;
    text-align: center;
}

.hero h1 {
    margin: 0 0 16px;
    font-size: 40px;
    letter-spacing: -0.02em;
}

.hero p {
    margin: 0 0 28px;
    color: var(--color-text-muted);
    font-size: 17px;
}

/* Sections */
.section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 70px 24px;
}

.section h2 {
    font-size: 26px;
    margin: 0 0 40px;
    text-align: center;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.card {
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 32px 24px;
    text-align: center;
}

.card h3 {
    margin: 12px 0;
    font-size: 18px;
}

.card p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 14px;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-soft);
}

.site-footer__inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 28px 24px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 13px;
}

/* Login page */
.login-wrap {
    max-width: 380px;
    margin: 90px auto;
    padding: 0 24px;
}

.login-wrap h1 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 32px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.login-form input[type="text"],
.login-form input[type="password"] {
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 15px;
}

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

.login-signup-link {
    text-align: center;
    font-size: 14px;
    color: var(--color-text-muted);
    margin-top: 18px;
}

.login-signup-link a {
    color: var(--color-primary);
    font-weight: 600;
}

.login-error {
    color: var(--color-primary);
    font-size: 13px;
    text-align: center;
    margin: -4px 0 4px;
}

/* Signup page - dense table-style layout (Korean B2B/exhibition registration convention) */
.signup-wrap {
    max-width: 880px;
    margin: 44px auto 90px;
    padding: 0 20px;
}

.signup-wrap h1 {
    text-align: center;
    font-size: 22px;
    margin: 0 0 6px;
}

.signup-desc {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 13px;
    margin-bottom: 28px;
}

.form-section {
    border: 1px solid var(--color-border);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.form-section__title {
    margin: 0;
    padding: 13px 20px;
    background-color: var(--color-bg-soft);
    border-bottom: 1px solid var(--color-border);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.form-section__title::before {
    content: "";
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--color-primary);
    margin-right: 8px;
}

.form-table {
    display: grid;
    grid-template-columns: 160px 1fr;
}

.form-row__label,
.form-row__field {
    padding: 10px 18px;
    border-top: 1px solid var(--color-border);
    font-size: 13px;
}

.form-table .form-row:first-child .form-row__label,
.form-table .form-row:first-child .form-row__field {
    border-top: none;
}

.form-row {
    display: contents;
}

.form-row__label {
    display: flex;
    align-items: center;
    background-color: #fafafa;
    border-right: 1px solid var(--color-border);
    color: var(--color-text);
    font-weight: 500;
}

.form-row__field {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.required {
    color: var(--color-primary);
    margin-left: 2px;
}

.signup-form input[type="text"],
.signup-form input[type="password"],
.signup-form input[type="email"],
.signup-form input[type="number"] {
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 13px;
    background-color: var(--color-bg);
}

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

.signup-form select {
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 13px;
    background-color: var(--color-bg);
    color: var(--color-text);
}

.field-select {
    flex: 0 0 240px;
}

.field-grow {
    flex: 1 1 220px;
    min-width: 0;
}

.field-narrow {
    flex: 0 0 100px;
}

.field-sep {
    color: var(--color-text-muted);
    font-size: 12px;
}

.choice-group {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 16px;
    font-size: 13px;
}

.choice-group label {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--color-text);
    font-weight: 400;
    cursor: pointer;
}

.signup-submit {
    text-align: center;
    margin-top: 28px;
}

.signup-submit .btn {
    min-width: 220px;
    padding: 12px 20px;
    font-size: 15px;
}

@media (max-width: 640px) {
    .form-table {
        grid-template-columns: 1fr;
    }

    .form-row__label {
        border-right: none;
        border-bottom: none;
        padding-bottom: 4px;
        font-size: 12px;
        color: var(--color-text-muted);
    }

    .form-row__field {
        padding-top: 4px;
    }

    .form-table .form-row:not(:first-child) .form-row__label {
        border-top: 1px solid var(--color-border);
    }

    .form-table .form-row:not(:first-child) .form-row__field {
        border-top: none;
    }
}

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

    .hero {
        padding: 60px 20px;
    }

    .hero h1 {
        font-size: 28px;
    }
}