@import url('https://fonts.googleapis.com/css2?family=David+Libre:wght@400;700&display=swap');
@import url('https://fonts.cdnfonts.com/css/inter');
@import url('https://fonts.cdnfonts.com/css/rubik');

:root {
  --color-primary-accent: #FFAD6F;
  --color-nav-active: #8D3D00;
  --color-nav-default: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-card-bg: #D9D9D9;
  --color-text: #000000;
  --font-primary: 'rubik', 'David Libre', serif;
  
  --border-radius: 20px;
  --transition: all 0.2s ease;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
}

header p {
    font-size: 1.2rem;
    color: #666;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    align-items: start;
}

.card {
    background: var(--color-card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
}

.card h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--color-text);
    padding-bottom: 0.5rem;
    display: inline-block;
}

/* Forms & Inputs */
input, textarea, select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #999;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    background: #fff;
    transition: var(--transition);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--color-primary-accent);
    box-shadow: 0 0 5px var(--color-primary-accent);
}

textarea {
    resize: vertical;
    min-height: 150px;
}

button {
    font-family: inherit;
    font-weight: 600;
    font-size: 1rem;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    transition: var(--transition);
    color: var(--color-text);
}

button:hover {
    background: var(--color-primary-accent);
}

.btn-primary {
    background: var(--color-primary-accent);
}

.btn-primary:hover {
    background: var(--color-nav-active);
    color: #fff;
}

.actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

/* Preset Sizes */
.filters {
    margin-bottom: 1.5rem;
}

.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tab {
    padding: 0.5rem 1rem;
    background: #fff;
    font-size: 0.9rem;
    border-radius: 20px;
}

.tab.active {
    background: var(--color-primary-accent);
}

.sizes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
    max-height: 400px;
    overflow-y: auto;
    padding-left: 0.5rem; /* For scrollbar */
}

/* Custom scrollbar for grid */
.sizes-grid::-webkit-scrollbar {
    width: 8px;
}
.sizes-grid::-webkit-scrollbar-thumb {
    background-color: #999;
    border-radius: 4px;
}

.size-card {
    border-radius: 8px;
    padding: 1rem;
    background: #fff;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.size-card h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.size-card p {
    font-size: 0.9rem;
    direction: ltr;
    margin-bottom: 0.5rem;
}

.size-card button {
    padding: 0.4rem;
    font-size: 0.8rem;
    width: 100%;
    background: #eee;
}
.size-card button:hover {
    background: var(--color-primary-accent);
}

/* Unit Converter */
.converter-settings {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.setting-group {
    flex: 1;
}

.setting-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
}

.units-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.unit-input label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.2rem;
    text-transform: uppercase;
}

.input-with-copy {
    display: flex;
    position: relative;
}

.input-with-copy input {
    border-radius: 0 8px 8px 0;
    direction: ltr;
}

.copy-unit {
    border-radius: 8px 0 0 8px;
    border-right: none;
    padding: 0 0.8rem;
    background: #eee;
}

.copy-unit:hover {
    background: var(--color-primary-accent);
}

.feedback {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: #4CAF50;
    font-weight: 600;
    min-height: 1.5em;
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    .actions {
        flex-direction: column;
    }
    .converter-settings {
        flex-direction: column;
    }
}