:root {
    --bg-color: #f7f9f9;
    --card-bg: #ffffff;
    --text-color: #0f1419;
    --secondary-text: #536471;
    --border-color: #eff3f4;
    --input-bg: #eff3f4;
    --input-focus-bg: #ffffff;
    --accent-color: #1d9bf0;
    --accent-hover: #1a8cd8;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
    --nav-height: 60px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.app-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.global-nav {
    width: 100%;
    height: var(--nav-height);
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.nav-content {
    width: 100%;
    max-width: 1000px;
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
}

.x-logo {
    width: 28px;
    height: 28px;
    fill: var(--text-color);
}

.nav-content h1 {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.main-content {
    width: 100%;
    max-width: 640px;
    margin: 32px 16px;
    background-color: var(--card-bg);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

#searchForm {
    padding: 32px;
    padding-bottom: 0;
    flex: 1;
}

.section {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.section-header {
    margin-bottom: 24px;
}

.section h2 {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 4px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    color: var(--secondary-text);
    margin-bottom: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-wrapper {
    position: relative;
    border-radius: 12px;
    background-color: var(--input-bg);
    transition: all 0.2s ease;
    border: 2px solid transparent;
}

.input-wrapper:focus-within {
    background-color: var(--input-focus-bg);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(29, 155, 240, 0.1);
}

input[type="text"],
input[type="number"],
input[type="date"],
select {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 16px;
    padding: 14px 16px;
    outline: none;
    font-family: inherit;
    font-weight: 500;
}

input::placeholder {
    color: #8b98a5;
}

.select-wrapper {
    position: relative;
    border-radius: 12px;
    background-color: var(--input-bg);
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.select-wrapper:focus-within {
    background-color: var(--input-focus-bg);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(29, 155, 240, 0.1);
}

select {
    appearance: none;
    cursor: pointer;
    padding-right: 40px;
}

.select-arrow {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-text);
    pointer-events: none;
    font-size: 12px;
}

.toggle-group {
    margin-top: 16px;
}

.toggle-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
    background-color: var(--input-bg);
    padding: 16px;
    border-radius: 16px;
}

.radio-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 16px;
    color: var(--text-color);
    font-weight: 500;
}

.radio-label input[type="radio"] {
    appearance: none;
    width: 22px;
    height: 22px;
    border: 2px solid #cfd9de;
    border-radius: 50%;
    outline: none;
    position: relative;
    margin-left: 12px;
    transition: all 0.2s;
    background-color: #fff;
}

.radio-label input[type="radio"]:checked {
    border-color: var(--accent-color);
    background-color: var(--accent-color);
}

.radio-label input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    background-color: white;
    border-radius: 50%;
}

.date-group {
    display: flex;
    gap: 20px;
}

.date-group .form-group {
    flex: 1;
}

.footer {
    padding: 24px 32px 32px 32px;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    margin-top: 8px;
}

#searchBtn {
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
    color: #ffffff;
    border: none;
    padding: 0 32px;
    height: 52px;
    border-radius: 26px;
    font-size: 17px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.2s;
    width: 100%;
    box-shadow: 0 4px 12px rgba(29, 155, 240, 0.3);
}

#searchBtn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(29, 155, 240, 0.4);
}

#searchBtn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(29, 155, 240, 0.3);
}

@media (max-width: 680px) {
    .main-content {
        margin: 0;
        border-radius: 0;
        box-shadow: none;
        max-width: 100%;
    }

    .nav-content {
        padding: 0 16px;
    }

    #searchForm {
        padding: 20px;
    }

    .footer {
        padding: 20px;
        position: sticky;
        bottom: 0;
        z-index: 10;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.05);
    }
}

.watermark {
    display: block;
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: #9ca3af;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.watermark:hover {
    color: var(--accent-color);
}