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

:root {
    --olive:  #7A8C6E;
    --mustard:#C4A33A;
    --blue:   #1C719B;
    --black:  #111111;
    --grey-9: #1F1F1F;
    --grey-7: #444444;
    --grey-5: #666666;
    --grey-3: #999999;
    --grey-2: #CCCCCC;
    --grey-1: #EEEEEE;
    --off:    #F5F5F5;
    --white:  #FFFFFF;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--white);
    color: var(--black);
    font-size: 15px;
    line-height: 1.55;
}

a {
    color: var(--blue);
    text-decoration: none;
}
a:hover { text-decoration: underline; }

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

/* HEADER */
header {
    border-bottom: 1px solid var(--grey-1);
    padding: 24px 0;
    margin-bottom: 40px;
}
header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.brand {
    font-size: 13px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--grey-5);
    font-weight: 600;
    text-decoration: none;
}
.brand:hover { color: var(--black); text-decoration: none; }
.brand-sub {
    font-size: 13px;
    color: var(--grey-3);
}

/* FOOTER */
footer {
    border-top: 1px solid var(--grey-1);
    margin-top: 64px;
    padding: 24px 0;
    font-size: 12px;
    color: var(--grey-3);
    text-align: center;
}

/* TYPOGRAPHY */
h1 {
    font-size: 1.8rem;
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 16px;
    color: var(--black);
}
h2 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--black);
}
h3 {
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--grey-5);
}
p { margin-bottom: 14px; color: var(--grey-7); }

/* FORMS */
.form-group {
    margin-bottom: 22px;
}
label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--grey-5);
    margin-bottom: 6px;
}
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
input[type="password"],
select,
textarea {
    width: 100%;
    border: 1px solid var(--grey-2);
    border-radius: 2px;
    padding: 11px 13px;
    font-family: inherit;
    font-size: 15px;
    color: var(--black);
    background: var(--white);
    transition: border-color 0.15s;
    outline: none;
}
input:focus,
select:focus,
textarea:focus {
    border-color: var(--blue);
}
textarea {
    min-height: 100px;
    resize: vertical;
}

/* RADIO + CHECKBOX */
.radio-group,
.check-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 4px;
}
.radio-group label,
.check-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: normal;
    text-transform: none;
    letter-spacing: 0;
    color: var(--black);
    cursor: pointer;
}
.radio-group input,
.check-group input {
    accent-color: var(--blue);
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* BUTTONS */
.btn {
    display: inline-block;
    padding: 11px 24px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.03em;
    cursor: pointer;
    border: none;
    border-radius: 2px;
    transition: background 0.15s, color 0.15s;
    text-decoration: none;
}
.btn-primary {
    background: var(--blue);
    color: var(--white);
}
.btn-primary:hover {
    background: var(--black);
    color: var(--white);
    text-decoration: none;
}
.btn-secondary {
    background: var(--white);
    color: var(--black);
    border: 1px solid var(--grey-2);
}
.btn-secondary:hover {
    border-color: var(--black);
    text-decoration: none;
}
.btn-urgent {
    background: var(--mustard);
    color: var(--black);
}
.btn-urgent:hover {
    background: var(--black);
    color: var(--white);
    text-decoration: none;
}

/* ALERTS */
.alert {
    padding: 12px 16px;
    margin-bottom: 18px;
    font-size: 14px;
    border-radius: 2px;
}
.alert-error {
    border-left: 3px solid #C0392B;
    background: #FDF0EF;
    color: #C0392B;
}
.alert-success {
    border-left: 3px solid var(--olive);
    background: #F2F5F1;
    color: #4A5E43;
}
.alert-info {
    border-left: 3px solid var(--blue);
    background: #EEF4F8;
    color: #1C719B;
}

/* CONDITIONAL FIELDS */
.hidden { display: none; }

/* HELPER */
.field-note {
    font-size: 12px;
    color: var(--grey-3);
    font-style: italic;
    margin-top: 4px;
}
.field-required {
    color: #C0392B;
    margin-left: 2px;
}