/* Reset and base styles */
* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: #f7f8fa;
    font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
    color: #222b45;
}

/* Unified Main Header */
.main-header {
    width: 100%;
    background: #fff;
    border-bottom: 1px solid #e4e9f2;
    box-shadow: 0 2px 8px rgba(52,120,246,0.05);
    position: sticky;
    top: 0;
    z-index: 20;
}

.header-inner {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 62px;
    justify-content: space-between;
    padding: 0 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 32px;
}

.site-title-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #3478f6;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-right: 18px;
}

.site-title {
    font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    color: #3478f6;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 18px;
}

.nav-link {
    color: #3d4253;
    text-decoration: none;
    font-size: 1.05rem;
    font-weight: 500;
    transition: color 0.18s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link:hover {
    color: #3478f6;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-right: 8px;
}

.icon {
    width: 22px;
    height: 22px;
    opacity: 0.65;
    cursor: pointer;
    transition: opacity 0.18s;
    display: flex;
    align-items: center;
    font-size: 1.2em;
}

.icon:hover {
    opacity: 1;
}

/* Main Content Container */
.container {
    max-width: 900px;
    margin: 44px auto;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 4px 24px 0 rgba(52,120,246,0.07), 0 1.5px 6px 0 rgba(60,72,88,0.04);
    padding: 36px 36px 28px 36px;
    border: 1px solid #f0f1f4;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin: 0 0 10px 0;
    letter-spacing: -1px;
}

.subtitle {
    text-align: center;
    color: #8f9bb3;
    font-size: 1.08rem;
    margin-bottom: 28px;
}

.form-label {
    font-size: 1rem;
    font-weight: 500;
    color: #8f9bb3;
    margin-bottom: 4px;
    display: block;
}

input[type="text"], textarea, select {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid #e4e9f2;
    border-radius: 8px;
    font-size: 1.07em;
    background: #f7f8fa;
    margin-bottom: 18px;
    transition: border 0.18s;
    color: #2d3551;
    font-family: inherit;
}

input[type="text"]:focus, textarea:focus, select:focus {
    border-color: #3478f6;
    outline: none;
}

textarea {
    min-height: 140px;
    resize: vertical;
}

.form-row {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
}

.form-row select {
    width: auto;
    min-width: 120px;
    margin-bottom: 0;
}

.form-row label {
    margin-bottom: 0;
    font-weight: 400;
}

.options-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    gap: 12px;
}

.options-row .option-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn {
    background: #3478f6;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 12px 32px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.18s, box-shadow 0.18s;
    box-shadow: 0 2px 8px rgba(52,120,246,0.08);
}

.btn:disabled {
    background: #d2d8e6;
    color: #fff;
    cursor: not-allowed;
}

.btn:hover:enabled {
    background: #255cc9;
}

::-webkit-scrollbar {
    width: 8px;
    background: #e4e9f2;
}
::-webkit-scrollbar-thumb {
    background: #c5d6ee;
    border-radius: 8px;
}

/* Footer */
.site-footer {
    width: 100%;
    background: #f7f8fa;
    border-top: 1px solid #e4e9f2;
    margin-top: 40px;
    padding: 0;
    font-size: 1.03em;
    flex-shrink: 0;
}

.footer-inner {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0 16px 0;
    flex-wrap: wrap;
}

.footer-left {
    color: #8f9bb3;
    font-size: 1em;
    font-weight: 400;
}

.footer-right {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.footer-link {
    color: #3478f6;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.18s;
    display: flex;
    align-items: center;
    font-size: 1em;
}

.footer-link:hover {
    color: #255cc9;
}

/* Sticky footer support */
.page-content {
    flex: 1 0 auto;
}

@media (max-width: 900px) {
    .container {
        max-width: 98vw;
        padding: 18px 6vw 18px 6vw;
    }
    .header-inner, .footer-inner {
        max-width: 98vw;
        padding: 0 6vw;
    }
    .header-left {
        gap: 12px;
    }
    .main-nav {
        gap: 10px;
    }
    .header-right {
        gap: 12px;
    }
    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 18px 6vw 16px 6vw;
    }
    .footer-right {
        gap: 14px;
    }
}