*,
*::before,
*::after {
    box-sizing:border-box;

    flex-shrink:0;
    margin:0;
    padding:0;
    flex-wrap:nowrap;

}
.flex {
    display:flex;
}
:root {
    --color-dark-roast:#4e342e;
    --color-latte:#f4f0ec;
    --color-espresso:#6d4c41;
    --color-cream:#fff8e1;
    --color-caramel:#ffb74d;
    --color-water:#e0e0e0;
    --color-sugar:#ffffff;
    --color-dark-text:#212121;
}
a {
    color:var(--color-dark-roast);
}
body {
    font-family:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    background-color:var(--color-latte);
    color:var(--color-dark-text);
    min-height:100vh;
    margin:0;
    padding:0;
    box-sizing:border-box;
}
#containerparent {
    margin-left:auto;
    margin-right:auto;
    max-width:800px;
    padding:16px;
}
@media (min-width:768px) {
    #containerparent {
        padding:32px;
    }
}

header {
    background:linear-gradient(135deg, var(--color-espresso), var(--color-dark-roast));
    color:var(--color-sugar);
    padding:5px 24px;
    border-radius:12px;
    box-shadow:0 10px 15px rgba(0, 0, 0, 0.2);
    margin-bottom:16px;
    text-align:center;
}
header h1 {
    font-size:28px;
    font-weight:800;
    letter-spacing:-1px;
    margin-bottom:8px;
}
@media (min-width:768px) {
    header h1 {
        font-size:48px;
    }
}
header p {
    font-size: 18px;
    color: var(--color-water);
    hyphens:auto;
}

main {
    margin-bottom:48px;
}

/* divdefault */
.dd {
    padding:16px;
    background-color:var(--color-dark-roast);
    box-shadow:0 10px 20px rgba(0, 0, 0, 0.3);
    border-radius:12px;
    color: var(--color-sugar);
}
.mt, .mt10 {
    margin-top:10px;
}
nav {
    display:flex;
    border-bottom:0px solid var(--color-espresso);
}
nav button {
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    margin-right: 8px;
    border: none;
}
nav button.active {
    background-color: var(--color-cream);
    color: var(--color-dark-roast);
}
nav button:not(.active) {
    background-color: var(--color-espresso);
    color: var(--color-water);
}
nav button:not(.active):hover {
    background-color: var(--color-mocha);
}
aside {
    margin-bottom:48px;
    display:flex;
    flex-direction:column;
    gap:32px;
}
aside div {
    background-color:var(--color-sugar);
    padding:24px 32px;
    border-radius:12px;
    box-shadow:0 4px 10px rgba(0, 0, 0, 0.08);
    border-top-width:4px;
    border-top-style:solid;
}
aside h3 {
    font-size:20px;
    font-weight:700;
    margin-bottom:12px;
    color:var(--color-dark-text);
}
aside p {
    color:#4a4a4a;
    line-height:1.6;
    text-align:justify;
    hyphens:auto;
}
aside > div:nth-child(2n + 1) {
    border-top-color:var(--color-esprsso);
}
aside > div:nth-child(2n) {
    border-top-color:var(--color-caramel);
}

footer {
    background-color:var(--color-dark-roast);
    color:var(--color-water);
    text-align:center;
    padding:12px;
    box-shadow:0 -2px 10px rgba(0, 0, 0, 0.15);
}
footer a {
  color:var(--color-caramel)
}

.hidden { display: none; }


button {
    padding:12px;
    font-weight:600;
    border-radius:8px;
    transition:background-color 0.2s, box-shadow 0.2s;
    box-shadow:0 4px 6px rgba(0, 0, 0, 0.1);
    cursor:pointer;
    border:none;
    background-color:var(--color-caramel);
    color:var(--color-dark-roast);            
}
button:hover {
    background-color:#f7a32b;
}
label {
    display:block;
    font-size:14px;
    font-weight:bold;
    color:var(--color-water);
    margin-bottom:4px;
    margin-top:10px;
}
textarea, input, select {
    width:100%;
    padding:12px;
    border-radius:8px;
    border:2px solid transparent;
    background-color:var(--color-espresso);
    color:var(--color-sugar);
    outline:none;
    transition:border-color 0.2s, box-shadow 0.2s;
}
textarea::placeholder, input::placeholder {
    color:var(--color-water);
}
textarea:focus, input:focus {
    border-color:var(--color-caramel);
    box-shadow:0 0 0 3px rgba(255, 183, 77, 0.5);
}

main h2 {
    font-size:24px;
    font-weight:700;
    margin-bottom:16px;
}