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

:root {
    --terracotta: #C4673A;
    --olive:      #7A8C6E;
    --slate:      #6B8E9F;
    --black:      #111111;
    --grey-dark:  #333333;
    --grey-mid:   #666666;
    --grey-light: #CCCCCC;
    --off-white:  #F5F5F5;
    --white:      #FFFFFF;
}

body {
    font-family: Georgia, 'Times New Roman', serif;
    background: var(--white);
    color: var(--black);
    font-size: 18px;
    line-height: 1.7;
}

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

/* HEADER */
header {
    border-bottom: 1px solid var(--black);
    padding: 32px 0 24px;
    margin-bottom: 56px;
}

header .container {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
}

.site-name {
    font-size: 13px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--grey-mid);
    text-decoration: none;
}

.site-name img {
    display: block;
    height: 32px;
    width: auto;
}

.site-title {
    font-size: 15px;
    font-weight: normal;
    color: var(--black);
    letter-spacing: 0.04em;
    text-decoration: none;
}

.site-title:hover {
    color: var(--terracotta);
    text-decoration: none;
}

/* FOOTER */
footer {
    border-top: 1px solid var(--grey-light);
    margin-top: 80px;
    padding: 32px 0;
    font-size: 13px;
    color: var(--grey-mid);
    text-align: center;
}

footer a {
    color: var(--grey-mid);
    text-decoration: none;
}

footer a:hover {
    color: var(--terracotta);
}

/* TYPOGRAPHY */
h1 {
    font-size: 2rem;
    font-weight: normal;
    line-height: 1.3;
    margin-bottom: 24px;
    color: var(--black);
}

h2 {
    font-size: 1.3rem;
    font-weight: normal;
    margin-bottom: 16px;
    color: var(--black);
}

h3 {
    font-size: 1rem;
    font-weight: bold;
    margin-bottom: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--grey-mid);
}

p {
    margin-bottom: 20px;
    color: var(--grey-dark);
}

a {
    color: var(--terracotta);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* FORMS */
.form-group {
    margin-bottom: 28px;
}

label {
    display: block;
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--grey-mid);
    margin-bottom: 8px;
}

input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    border: 1px solid var(--grey-light);
    border-radius: 0;
    padding: 14px 16px;
    font-family: Georgia, serif;
    font-size: 17px;
    color: var(--black);
    background: var(--white);
    transition: border-color 0.2s;
    outline: none;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
    border-color: var(--terracotta);
}

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

/* BUTTONS */
.btn {
    display: inline-block;
    padding: 14px 36px;
    font-family: Georgia, serif;
    font-size: 16px;
    cursor: pointer;
    border: none;
    transition: background 0.2s, color 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--terracotta);
    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(--black);
}

.btn-secondary:hover {
    background: var(--black);
    color: var(--white);
    text-decoration: none;
}

/* MODULE PROGRESS */
.progress-bar {
    display: flex;
    gap: 6px;
    margin-bottom: 48px;
}

.progress-step {
    height: 3px;
    flex: 1;
    background: var(--grey-light);
}

.progress-step.done {
    background: var(--olive);
}

.progress-step.active {
    background: var(--terracotta);
}

/* MODULE */
.module-number {
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--terracotta);
    margin-bottom: 12px;
}

.module-body {
    border-top: 1px solid var(--grey-light);
    padding-top: 32px;
    margin-top: 32px;
    margin-bottom: 48px;
}

/* REFLECTION */
.reflection {
    background: var(--off-white);
    padding: 32px;
    margin-top: 40px;
    margin-bottom: 32px;
}

.reflection h3 {
    margin-bottom: 20px;
}

.reflection p.prompt {
    font-style: italic;
    color: var(--grey-dark);
    margin-bottom: 16px;
}

/* REST NUDGE */
.rest-nudge {
    border-left: 2px solid var(--terracotta);
    padding: 16px 20px;
    margin: 32px 0;
    font-size: 16px;
    color: var(--grey-mid);
    font-style: italic;
}

/* NAVIGATION */
.module-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--grey-light);
}

/* ALERTS */
.alert {
    padding: 16px 20px;
    margin-bottom: 24px;
    font-size: 16px;
}

.alert-error {
    border-left: 3px solid #C0392B;
    background: #FDF0EF;
    color: #C0392B;
}

.alert-success {
    border-left: 3px solid var(--olive);
    background: #F2F5F1;
    color: #4A5E43;
}

/* LANDING PAGE */
.intro {
    margin-bottom: 56px;
}

.intro h1 {
    font-size: 2.4rem;
    margin-bottom: 20px;
}

.course-overview {
    border-top: 1px solid var(--grey-light);
    padding-top: 40px;
    margin-bottom: 56px;
}

.module-list {
    list-style: none;
    counter-reset: module-counter;
}

.module-list li {
    counter-increment: module-counter;
    padding: 16px 0;
    border-bottom: 1px solid var(--grey-light);
    display: flex;
    align-items: baseline;
    gap: 16px;
    font-size: 17px;
    color: var(--grey-dark);
}

.module-list li::before {
    content: counter(module-counter);
    font-size: 12px;
    color: var(--terracotta);
    letter-spacing: 0.08em;
    min-width: 20px;
}

/* COMPLETION */
.completion-message {
    text-align: center;
    padding: 56px 0;
}

.completion-message h1 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

/* RESPONSIVE */
@media (max-width: 600px) {
    body { font-size: 16px; }
    h1 { font-size: 1.6rem; }
    .intro h1 { font-size: 1.8rem; }
    .reflection { padding: 20px; }
    .btn { width: 100%; text-align: center; }
    .module-nav { flex-direction: column; gap: 12px; }
}
.form-row input,
.form-row select,
.form-row textarea {
    width: 100%;
}