* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

:root {
    /* Cores de base */
    --background: hsl(0, 0%, 97%);
    --card: hsl(0, 0%, 100%); 
    --border: hsl(214.3, 31.8%, 91.4%);

    /* Cores de marca (Brand) */
    --primary: hsl(121, 50%, 58%);
    --primary-hover: hsl(121, 49%, 62%);
    --secondary: hsl(122, 52%, 71%);
    --secondary-hover: hsl(121, 57%, 48%);
    --shadow: hsla(122, 52%, 71%, 0.2);

    /* Cores de texto */
    --text-primary: hsl(222, 88%, 13%);
    --text-on-primary: hsl(0, 0%, 100%);
    --text-secondary: hsl(215, 16%, 47%);
    --text-muted: hsl(0, 0%, 46%);
    
    /* Cores de feedback/status */
    --success: var(--primary);
    --danger: hsl(0, 78%, 63%);
    
    /* Cores de componentes específicos */
    --result-background: hsl(120, 50%, 98%);
    --result-border: hsl(122, 49%, 85%);
}

body {
    height: 100vh;
    background-color: var(--background);
    color: var(--text-primary);
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.calculadora {
    display: flex;
    flex-direction: column;
    max-width: 447px;
    width: 100%;
    background-color: var(--card);
    padding: 1.5rem 1.5rem 0;
    margin: 1rem;
    border-radius: 10px;
    box-shadow: var(--shadow) 0px 8px 24px;
}

.calculadora__header {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.calculadora__header-icon {
    color: var(--primary);
    font-size: 1.875rem;
}

.calculadora__title {
    font-size: 1.5rem;
    text-align: center;
}

.calculadora__input-group {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.calculadora__input-icon {
    position: absolute;
    top: 14%;
    left: 12px;
    color: var(--text-muted);
}

.calculadora__input {
    font-size: 1rem;
    padding: 0.5rem 0.75rem 0.5rem 2.50rem;
    background-color: var(--background);
    border: 2px solid var(--border);
    border-radius: 8px;
}

.calculadora__input:focus {
    outline: none;
    border-color: var(--primary);
}

.calculadora__button {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    color: var(--text-on-primary);
    font-weight: 600;
    padding: 12px 1rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s ease-in-out;
}

.calculadora__button:hover {
    transform: scale(1.01);
}

.calculadora__button .fa-plus,
.calculadora__button .fa-equals {
    font-size: 0.875rem;
}

.calculadora__button--add {
    background-color: var(--primary);
    font-size: 0.875rem;
}

.calculadora__button--add:hover {
    background-color: var(--primary-hover);
}

.calculadora__button--calculate {
    background-color: var(--secondary);
    font-size: 1rem;
    margin: 1.5rem 0;
}

.calculadora__button--calculate:hover {
    background-color: var(--secondary-hover);
}

.calculadora__notes-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.calculadora__note-item {
    list-style: none;
    font-weight: 600;
    background-color: var(--background);
    padding: 0.625rem 1rem;
    border-radius: 10px;
}

.calculadora__result {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--result-background);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    border: 2px solid var(--result-border);
    border-radius: 12px;
}

.calculadora__result-average {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--success);
    margin-bottom: 0.75rem;
}

.calculadora__result-status {
    font-weight: 700;
}

.calculadora__result-status--approved {
    color: var(--success);
}

.calculadora__result-status--failed {
    color: var(--danger);
}